烷基磺酸钠型砂的质量控制

介绍了控制烷基磺酸钠型砂的混砂工艺、配制要点及保存使用等控制要点，并就实际生产中可能出现的一些问题作了探讨，提出了解决的办法。     

烷基糖苷—新型世界级表面活性剂

本文综述了烷基糖苷的合成方法、物化性能及应用性能。     

易染性共聚醚酯热氧化稳定性研究

分析了高聚物的氧化裂解机理及抗氧化剂的作用原理。选择了对提高共聚醚酯的热稳定性较为有效的复合抗氧化剂，用测定该共聚醚酯的特性粘度和端羧基含量改变的方法来表征分子量的变化，证实了抗氧剂的作用机理和复合抗氧化剂之间的协同效应     

烷基磷酸酯的合成及动力学研究

采用五氧化二磷法直接酯化制备烷基磷酸酯。研究了反应机理,建立了反应动力学方程。在本实验条件下,测出反应的表观活化能为42.8 kJ.mol-1,指前因子为864 L.mol-1.min-1。同时,得到了反应的表观动力学方程。     

SYNTHESIS OF AROMA COMPONENTS DURING THE SPONTANEOUS FERMENTATION OF LAMBIC AND GUEUZE

Lambic is a type of Belgian beer obtained by spontaneous fermentation of wort. The fermentation in casks takes almost two years, and after that period the beer may be re-fermented in bottles and is then called gueuze. To gain insight into the many microbiological transformations occurring during this process, a qualitative and quantitative study of several components formed over a two-year period was undertaken. It was found that lambic and gueuze are characterized by high contents of ethyl acetate, ethyl lactate, lactic acid and acetic acid. Two phases of fermentation may be distinguished: a primary phase lasting for about three months during which almost all the ethanol and higher alcohols are formed and a very long secondary phase during which lactic acid is formed first, followed by ethyl lactate. Some lower fatty acids, including all the acetic acid, are made at the very beginning of the first phase. An important part of the ethyl acetate is made during the first phase but the amounts increase slowly to high levels during the second phase. Unusually low amounts of isoamyl acetate are detected. Several components are above the reported threshold levels of taste and are thus probably involved in the genesis of the typical aroma of lambic and gueuze. These results will allow a further study of the relations between the components found and the microbial populations involved in the spontaneous fermentation inherent in the brewing of lambic and gueuze.     

Assay of ascorbic phosphates and in-vitro availability assay of ascorbic mono-and polyphosphates

A method was devised to assay ascorbic phosphate esters in biological materials by potassium bromoxide hydrolysis followed by determination of the liberated ascorbic acid. For the differential measurement of ascorbic acid and ascorbic phosphate, a spectrophotometric method was employed to screen out the interfering substances based on studies of absorbance curves of 2,4-dinitrophenyl hydrazine derivatives. A variety of vertebrate tissues were examined for phosphatase activity on ascorbic phosphate esters. The results suggest that pigeon kidney, rat liver and several tissues of fishes readily hydrolyse ascorbic monophosphate but not ascorbic polyphosphate. Hydrolysis of ascorbic monophosphate is completed by both phosphatases of intestine, kidney and liver acting at neutral pH and phosphatase of stomach acting at acid pH. Thus, ascorbic monophosphate has the potential to be a source of available vitamin C in vivo, and this explains its antiscorbutic activity in scurvy-prone animals.     

Oil soluble polymers as a viscosity-reducing agent for super heavy oil

We, the Editor and the Publisher of Petroleum Science and Technology, have retracted the following article:

Li-Yan Pan, Guo-Qing Feng, Jin-cheng Mao &; Hai-Bin Wang. “Oil soluble polymers as a viscosity-reducing agent for super heavy oil,” Petroleum Science and Technology, Volume 35, 2017, Issue 8, pages 747–753. doi:10.1080/10916466.2016.1273240

We are now cognizant of the fact that the above article has substantial text-matching with the following article, to which no attribution was made:

Jincheng Mao, Jiawei Liu, Haibin Wang, Xiaojiang Yang, Zhaoyang, Bo Yang &; Jinzhou Zhago. “Novel terpolymers as viscosity reducing agent for Tahe super heavy oil,” RSC Advances, Volume 7, 2017, Issue 31, pages 19257–19261.

It is therefore not deemed to be an original contribution. We note the breach of warranties made by the authors with respect to originality and provenance, and of our policy on publishing ethics and integrity. We note that we received, peer-reviewed, accepted, and published the article in good faith based on these warranties, and censure this action.

We have been informed in our decision-making by our policy on publishing ethics and integrity and the COPE guidelines on retractions. The retracted article will remain online to maintain the scholarly record, but it will be digitally watermarked on each page as “Retracted”.     

Heavy paraffin dehydrogenation and hydrogenation of nitrobenzene to aniline: Effects of operating conditions

Auto-thermal heat exchanger configurations are recognized as a novel concept in process intensification. In the current study, the influence of operating conditions in a novel coupling reactor with radial-flow pattern is investigated for heavy paraffin dehydrogenation process. Catalytic hydrogenation of nitrobenzene to aniline takes place in the exothermic side and supplies the necessary heat for the endothermic dehydrogenation of heavy paraffin reaction. The performance of the reactor is numerically investigated for various key operating variables, such as inlet molar flow rates of exothermic and endothermic streams, number of subsections, and exothermic side angle. The reactor performance is analyzed based on temperature, olefin production rate, and nitrobenzene conversion.     

生物基润滑油基础油的结构创新与产业化进展

润滑油源头污染、过程污染、泄漏和再加工污染问题日益受到重视,研究开发与应用环保型生物基润滑油基础油至关重要。在经济和法律双重引导下,国外大型润滑油公司不断推陈出新,小型的专业化公司持续涌现,先后开发了多种不同结构、制备路线的生物基润滑油基础油,部分已面向工业化。笔者就近年来生物基润滑油基础油的结构创新与产业化进展进行综述,详细列举了植物油脂或糖制备高性能基础油的新路径,并探讨了脂肪酸内酯基础油分子结构对理化性能的影响规律,从分子尺度揭示影响基础油性能的关键因素。最后,简单讨论了国内生物基润滑油基础油与国外所存在的技术水平、环境效益和经济效益的差距,提出了发展设想。发展设想。     

Synthesis and Interfacial Tension Behavior of Heavy Alkyl Benzene Sulfonates

Heavy alkyl benzene sulfonates (HABS) were synthesized, and their interfacial tensions were measured and compared with those of petroleum sulfonates ORS-41. Effects of their coupling with lignosulfonate were also studied. The results showed that HABS exhibited good interfacial activities and the system of HABS blending with LS displayed better interfacial activities than ORS-41 and therefore reduced the prime cost. Their best proportions of synergism were from 3:1 to 4:1. HABS might be a more promising alkali-surfactant-polymer (ASP) flooding agent.