新型化学反应器研究的前沿课题

对目前国内外新型化学反应器研究的前沿课题进行了简要总结,指出了开发新型与多功能化学反应器的４条途径,并给出了具体实例。     

热流道技术专题

随着热流道技术的日渐推广应用,热流道模具在塑料模具中所占比重将逐步提升。在国外,许多塑料模具厂生产的模具50%以上采用热流道技术,有的甚至达80%以上,效果十分明显。热流道在国内也已用于生产,但目前总体不足10%,这个差距相当巨大,但也意味着这个行业在国内有着相当大的发展空间。     

历年世界环境日主题

1974年只有一个地球 1975年人类居住 1976年水:生命的重要源泉 1977年关注臭氧层破坏、水土流失、土壤退化和滥伐森林 1978年没有破坏的发展 1979年为了儿童和未来一—没有破坏的发展 1980年新的10年,新的挑战—没有破坏的发展 1981年保护地下水和人类食物链;防治有毒化学品污染 1982年纪念斯德哥尔摩人类环境会议10周年—提高环境意识 1983年管理和处置有害废弃物;防治酸雨破坏和提高能源利用率 1984年沙漠化1985年青年、人口、环境 1986年环境与和平 1987年环境与居住 1988年保护环境、持续发展、公众参与 1989年警惕,全球变暖! 1990年儿…     

Update on curtain granulation of phosphates

The TVA process for curtain granulation of ammonium polyphosphate, which was described at the 194th National Meeting of the American Chemical Society, has been modified to allow production of a variety of ammonium phosphate fertilizers. Ammonium polyphosphate, monoammonium phosphate, diammonium phosphate, and urea-ammonium polyphosphate fertilizers have been produced. In the process, wet-process orthophosphoric acid, ammonia, and, for some products, urea melt are fed to a pipe reactor to produce an ammonium phospahte or a urea-ammonium polyphosphate melt. The melt is sprayed directly from the pipe reactor onto a falling curtain of recycled fines in a granulator with specially designed internals. The melt solidifies in thin, successive layers and forms round, closely sized granules. The products have excellent physical properties and are suitable for direct application, bulk blending, or production of suspensions.     

最新树脂

由于涂料企业对树脂产品的依赖性越来越强，树脂供应商在面临自身生产成本不断上升的同时还必须肩负起更多的责任，生产出更多性能更好的树脂产品。     

氯产品生产、市场与热点话题的分析

针对国内氯碱产品,尤其是氯产品的生产现状和市场需求情况,重点分析了氯碱行业内的一些热点话题。指出氯碱行业内应优化产业结构,避免装置的低水平重复建设,进行一体化产业链的整合与建立,推广绿色清洁工艺,加速产品向精细化、系列化和高附加值化发展的进程,正确认识和面对反倾销,以促进我国氯碱工业健康、有序的发展。     

Update on vegetable lecithin and phospholipid technologies

This paper reviews the production technologies for sourcing lecithins from the oil‐bearing seeds soybean, rapeseed and sunflower kernel. The phospholipid composition is measured by newly developed HPLC‐LSD and ³¹P‐NMR methods. The phospholipid compositions of the three types of lecithin show small differences, while the fatty acid composition is largely equivalent to the oil source. Regulatory specifications (FAO/WHO, EU, FCC) and DGF and AOCS analytical methods for product quality are compiled. Phospholipid modifications by enzymatic hydrolysis, solvent fractionation, acetylating and hydroxylation processes result in lecithins with specific enhanced hydrophilicity and oil‐in‐water emulsifying properties. New available phospholipase and lipase enzymes represent opportunities for the esterification of phospholipids with special omega fatty acids and serine groups. Application characteristics are given for use in yellow fat spreads, baked goods, chocolate, agglomerated instant powders, liposome encapsulation, animal feed, food supplements and pharmaceutics.