Search

The copolymer composed with acrylamide (AM) and N, N-dimethylacrylamide (DMAA) was prepared by using inverse emulsion polymerization with sorbitan monooleate (SPAN-80) as emulsifier, white mineral oil as oil phase, and ammonium persulfate (APS) and tetramethylenediamine (TEMED) as redox initiation systems. The product was characterized by hydrogen nuclear magnetic resonance spectroscopy. Firstly, the relationship between polymerization rate (rp) and monomer feed molar ratio was studied in the range of n(DMAA)∶n(AM)= 1∶100 to 1∶25. The results showed that the polymerization rate increased with increasing the DMAA in feed molar ratio and the amount of DMAA structural unit in the resultant copolymer was higher than that in the recipe. By comparing with conventional emulsion polymerization, there was no constant rate period ( i.e., interval II) according to the behavior of polymerization rate versus time, suggesting that the mechanism for particle nucleation (i.e., formation of polymer particles) might be dominated by monomer droplet nucleation. Then a variety of hehaviors were studied for the polymerization rate versus monomer concentration (cM, 14.42—16.00 mol/L), initiator concentration (cI, 0.0043—0.0081 mol/L), and emulsifier concentration (cE, 0.200—0.234 mol/L) at 296.15 K. The polymerization rate equation was rp=kcM1.74cI0.82cE0.77, indicating that monomer concentration had the greatest effect on the polymerization rate among the behaviors investigated. Finally, the apparent activation energy of 20.53 kJ/mol for the inverse emulsion polymerization of AM and DMAA was obtained by Arrhenius formula in the range of 288.15—301.15 K. [ABSTRACT FROM AUTHOR]

Copyright of Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Wool Textile Journal is the property of National Wool Textile Science & Technology Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Petroleum Geology & Oilfield Development in Daqing is the property of Editorial Department of Petroleum Geology & Oilfield Development in Daqing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Plastics / Zhongguo Suliao is the property of Journal Office of CHINA PLASTICS and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food & Machinery is the property of Food & Machinery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Preventive Veterinary Medicine / Zhongguo Yufang Shouyi Xuebao is the property of Chinese Journal of Preventive Veterinary Medicine Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective Solve the single raw material problem of rubber filling oil production. Methods All-hydrogen hydrogenation tests were carried out on the mixed oil of intermediate base and naphthyl using hydrogenation catalysts A and B, heterogeneous dewaxing catalyst C and supplementary refining catalyst D. Results Under the conditions of temperature of 382 ℃, 315 ℃, 240 ℃, space velocity of 0.4 h-1, 1.0 h-1, 0.6 h-1, hydrogen to oil ratio of 1 000∶1, 800∶1, 800∶1, the viscosity of 380-400 ℃ fraction at 100 ℃ was 6.208 mm~2/s, CA value was 0, CN value was 56.1%, which met the standard of rubber oil N4006 in HG/T 5085-2016 Rubber plasticizer-naphthene base mineral oil. The viscosity of 400-440 ℃ fraction at 100 ℃ was 9.565 mm~2/s, CA value was 0, CN value was 54.7%, which met the standard of rubber oil N4010 in HG/T 5085-2016. The viscosity of the fraction above 440 ℃ at 100 ℃ was 15.94 mm~2/s, the CA value was 0, and the CN value was 51.5%, which met the standard of rubber oil N4016 in HG/T 5085-2016. Conclusion Above results verified the feasibility of intermediate base oil blended with naphthenic oil to produce rubber filling oil. [ABSTRACT FROM AUTHOR]

Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The Cretaceous continental strata developed in eastern Northeast China are rich in animal and plant fossils and have formed important minerals such as coal and oil shale. The only records of the earliest marine strata in Early Cretaceous are also preserved here besides Tibet' which is of great significance for the study on Cretaceous geography in China. Many new discoveries have been made in the Cretaceous stratigraphy of this area in recent years' some of which have filled the gaps of strata study in Northeast China. The paper also preliminarily discusses the co-evolution of Late Cretaceous flora and fauna represented by dinosaurs in the region. [ABSTRACT FROM AUTHOR]

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In view of the strict performance requirements of screw air compressor oil in oxidation resistance, friction and wear resistance and oil-water separation, the base oil composed of mineral oil and synthetic oil was adopted, and appropriate phenolic antioxidant, amine antioxidant, metal corrosion inhibitor, extreme pressure anti-wear agent and other functional additives were added, and a screw air compressor oil with stable antioxidant and excellent extreme pressure and anti-wear was developed. The extreme pressure performance and friction and wear properties of the developed oil were evaluated on the four ball friction and wear test machine, and simulated oxidation evaluation test was carried out. The results show that the developed oil has excellent oxidation resistance, can meet the long oil change cycle of 5 000 h, and its performance is equivalent to that of imported special oil. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Cotton Textile Technology is the property of Cotton Textile Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Surfactant Detergent & Cosmetics (1001-1803) is the property of China Surfactant Detergent & Cosmetics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Ｉｎ ｏｒｄｅｒ ｔｏ ｖｉｓｕａｌｉｚｅ ｔｈｅ ｉｎｔｅｒｎａｌ ｄｅｆｏｒｍａｔｉｏｎ ｏｆ ｃｌａｙ ｄｕｒｉｎｇ ｃｏｎｓｏｌｉｄａｔｉｏｎꎬ ｔｒａｎｓｐａｒｅｎｔ ｃｌａｙ ｗｉｔｈ ｓｉｍｉｌａｒ ｃｏｎｓｏｌｉｄａｔｉｏｎ ｃｈａｒａｃｔｅｒｉｓｔｉｃｓ ｎｅｅｄｓ ｔｏ ｂｅ ｐｒｅｐａｒｅｄ. Ａ ｔｒａｎｓｐａｒｅｎｔ ｃｌａｙ ｗｈｉｃｈ ｃａｎ ｓｉｍｕｌａｔｅ ｔｈｅ ｃｏｎｓｏｌｉｄａｔｉｏｎ ｏｆ ｃｌａｙ ｓｏｉｌ ｗａｓ ｐｒｅｐａｒｅｄ ｂｙ ｕｓｉｎｇ ａｍｏｒｐｈｏｕｓ ｓｉｌｉｃａ ｐｏｗｄｅｒꎬ ｔｈｅ ｍｉｘｔｕｒｅ ｏｆ ｗｈｉｔｅ ｍｉｎｅｒａｌ ｏｉｌ ａｎｄ ｎ￣ｄｏｄｅｃａｎｅ. Ｐｅｒｍｅａｂｉｌｉｔｙ ｔｅｓｔ ａｎｄ ｃｏｍｐｒｅｓｓｉｏｎ ｃｏｎｓｏｌｉｄａｔｉｏｎ ｔｅｓｔ ｏｎ ｔｒａｎｓｐａｒｅｎｔ ｃｌａｙ ｗｉｔｈ ｄｉｆｆｅｒｅｎｔ ｇｒａｉｎ ｃｏｍｐｏｓｉｔｉｏｎ ｗｅｒｅ ｃａｒｒｉｅｄ ｏｕｔ. Ｔｈｅ ｅｘｐｅｒｉｍｅｎｔａｌ ｒｅｓｕｌｔｓ ｓｈｏｗ ｔｈａｔ ｔｈｅ ｅ￣ｌｇｋꎬ Ｃｖ ￣ｐ ａｎｄ Ｅｓ ￣ｐ ｃｕｒｖｅｓ ｏｆ ｔｒａｎｓｐａｒｅｎｔ ｃｌａｙ ａｒｅ ｓｉｍｉｌａｒ ｔｏ ｔｈｏｓｅ ｏｆ ｎａｔｕｒａｌ ｃｌａｙ. Ｔｈｅ ｈｉｇｈｅｒ ｔｈｅ ｃｌａｙ ｃｏｎｔｅｎｔ ｉｓꎬ ｔｈｅ ｓｍａｌｌｅｒ ｔｈｅ ｐｅｒｍｅａｂｉｌｉｔｙ ｃｏｅｆｆｉｃｉｅｎｔ ｉｓꎬ ａｎｄ ｔｈｅ ｓｍａｌｌｅｒ ｔｈｅ ｃｏｎｓｏｌｉｄａｔｉｏｎ ｃｏｅｆｆｉｃｉｅｎｔ ｉｓꎬ ｔｈｅ ｈｉｇｈｅｒ ｔｈｅ ｃｏｍｐｒｅｓｓｉｂｉｌｉｔｙ ｉｓ. Ｔｈｅ ｓｉｍｉｌａｒｉｔｙ ｂｅｔｗｅｅｎ ｔｒａｎｓｐａｒｅｎｔ ｃｌａｙ ａｎｄ ｎａｔｕｒａｌ ｃｌａｙ ｉｎ ｃｏｎｓｏｌｉｄａｔｉｏｎ ａｎｄ ｐｅｒｍｅａｂｉｌｉｔｙ ｓｈｏｗｓ ｔｈｅ ｆｅａｓｉｂｉｌｉｔｙ ｏｆ ｕｓｉｎｇ ｔｒａｎｓｐａｒｅｎｔ ｃｌａｙ ｔｏ ｑｕａｌｉｔａｔｉｖｅｌｙ ｓｉｍｕｌａｔｅ ｔｈｅ ｃｏｎｓｏｌｉｄａｔｉｏｎ ｄｅｆｏｒｍａｔｉｏｎ ｏｆ ｎａｔｕｒａｌ ｃｌａｙ. [ABSTRACT FROM AUTHOR]

In order to clarify the effect of different thickeners on the stability of oil suspension system with mineral oil as dispersion medium, 12.5% oxadiargyl + pyrazosulfuron-ethyl oil dispersion was used as the research object. The effects of three types of thickeners (including organic bentonite, organic polymer and gaseous silica) and organic bentonite used with other two types of thickeners on the physical stabilities of oil dispersions were studied by rheology and multiple light scattering methods. The results showed that the flow characteristic index (n) of all samples were less than 1, which was a pseudoplastic fluid with thixotropic properties. Except the combination of organic bentonite and organic polymer Atlox Rheostrux 100, the system was more in line with the Casson equation. While other samples were more in line with the Herschel-Bulkley equation. Organic bentonite has a relatively good performance to increase the stability of the system when used alone. Two kinds of organic polymer thickeners, including Atlox Rheostrux 100 and Atlox Rheostrux 200, had different performance. Atlox Rheostrux 100 had more significsant effect than that of Atlox Rheostrux 200, which might result from their different molecular structures. Two gaseous silica thickeners exhibited little effect, because they can’t form hydrogen bonds effectively. When organic bentonite used with other two types of thickeners, organic bentonite and organic polymer combination can improve the performance. Particularly, organic bentonite 869 and Atlox Rheostrux 100 combination was better than others, wich suspension system had high viscosity and good thixotropy, and excellent physical stability. However, organic bentonite 869 and hydrophobic silica R974 combination had no improvement. The results showed that both rheological and multiple light scattering can characterize the physical stability of the oil dispersion, and the novel orgainc polymer thickener and organic bentonite have synergistic effect, combination reasonable can greatly improve the stability of the oil dispersion. [ABSTRACT FROM AUTHOR]

Copyright of Forest Research is the property of Forest Research Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas Industry is the property of Natural Gas Industry Journal Agency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Hydrocarbon charging during burial period can cause a series of organic-inorganic physical and chemical changes in the reservoir, thus reforming the size of the reservoir space and wettability of the reservoir, thereby affecting the physical properties and the migration of oil and gas. The influence of hydrocarbon charging on reservoir is mainly manifested in the following four aspects: ① Organic hydrocarbon generation and early occupancy of hydrocarbon charging can increase the compaction resistance of rock layers, so that the reservoir under deep buried conditions can still preserve more reservoir space and permeability; ② hydrocarbon charging can restrain the growth of authigenic minerals to a certain extent, such as authigenic quartz, authigenic illite and so on, then reduce the pore-reducing effect caused by cementation; ③ organic acid accompanied by hydrocarbon charging can dissolve and transform the soluble minerals, such as feldspar clastic and calcite cements in the reservoir, thus effectively improving the physical properties and pore structure of the rock; ④ early hydrocarbon charging can form oil film on the mineral surface, which makes the reservoir appear neutral-weak lipophilic, and is beneficial to overcome the surface tension of molecules in oil and gas migration. To sum up, it is effective to predict the dominant migration path of oil and gas by establishing the diagenetic evolution sequence of hydrocarbon charging and reservoir, and restoring the spatial association of authigenic minerals in the reservoir-forming period. [ABSTRACT FROM AUTHOR]

Chemical demulsification treatment of waste oil-based drilling fluid was studied. The screened best demulsifier SA could recover the mineral oil and the oil recovery rate reached 93%. The optimal demulsification process parameters were determined: adding amount of demulsifier SA is 0.8%, PAC coagulant dosage is 600 mg/L, flocculants PAM dosage is 8mg/ L, and the reaction time is 1h, temperature is (50±0.5)°C. Harmless treatment of isolated waste water and residue were also conducted. [ABSTRACT FROM AUTHOR]