尿液喷浆造粒--生产复合肥的一种新工艺

介绍了在团粒法工艺的基础上，用尿素熔融尿液或尿素车间二段蒸发器的尿液进行喷浆造粒生产复合肥的改造方案、改造内容、改造效果和投资情况。     

大颗粒尿素造粒工艺简介

介绍了大颗粒尿素造粒工艺，着重介绍了荷兰NSM公司的流化床造粒技术和法国K－T公司的流化床转鼓造粒（FDG）技术。     

尿素熔融喷浆造粒工艺在复合肥生产过程中存在的问题及对策

介绍在团粒法工艺的基础上，将尿素熔融成尿液进行喷浆造粒生产复合肥的过程中，存在的问题，原因及解决的对策。     

2-HEMA-g-Na-PCMS: A Novel Polymeric Matrix for the Controlled Release of Paracetamol

2-hydoxyethyl methacrylate (2-HEMA) was graft copolymerized with sodium salt of partially carboxymethylated starch (Na-PCMS). Thus prepared, graft copolymer (2-HEMA-g-Na-PCMS) was used as a polymeric matrix for preparing controlled-release tablets of paracetamol. Tablets of standard specification were prepared using the wet granulation method. Ingredients utilized for tablet preparation were 2-HEMA-g-Na-PCMS graft copolymer, paracetamol and excipients. Tablets were characterized for disintegration time (min), hardness, angle of repose and percent friability. It was found that tablets prepared by the compression of graft copolymer, excipients and drug in specified ratios resulted in an excellent controlled-release tendency of paracetamol.     

高海拔地区预中和氨化粒化法磷铵生产过程特点

对高海拔地区预中和氨化粒化法磷按生产过程进行了分析,认为高海拔地区的自然环境与低海拔地区相比有较大的差异。在高海拔地区进行工艺参数选取和设备选型时必须考虑其特点,主要为干燥推动力大,各部分氨逸出量大,尾气处理最大,故相关设备的尺寸应适当加大。     

尿基复合肥生产工艺

在团粒法工艺基础上 ,用熔融尿素或尿素车间一段蒸发器的尿液进行喷浆造粒生产复合肥的改造方案、内容、投资及效果。成球率由 6 0 %～ 70 %提高到 80 %～ 90 % ,含氮量控制精度± 1% ,产品水分≤ 1.5 %。     

Non-uniformity of binder distribution in high-shear granulation

Further experimental investigation based on a microscopic, or single granule, scale has been conducted to investigate the uniformity of binder composition within a given size class for high shear melt granulation. This work assesses whether there is significant non-uniformity of binder composition within size classes to warrant considering this level of detail to improving population balance modelling of high shear granulation. It is concluded that at early times in a batch granulation process there is a broad variation in binder content between individual granules and that this variation persists in granules of small size.     

委内瑞拉减渣热转化及其残渣油反溶剂造粒研究

研究在间歇釜式反应装置上委内瑞拉渣油的热转化,在常温常压下,选择甲苯为溶剂,正戊烷为反溶剂,选取反应温度为420℃,反应时间为30～90 min的热反应残渣油进行反溶剂造粒。残渣油浓度从20.0%～66.7%,剂油比从2∶1至8∶1进行反溶剂造粒,随着溶液浓度的减小和剂油比的增大,不溶物沥青颗粒收率呈下降趋势;随着溶液浓度的减小和剂油比的增大,不溶物沥青颗粒的粒度减小且粒度分布趋于均匀。反溶剂比为8∶1时,戊烷可溶物和戊烷不溶物中的H/C原子比都相对较高。     

Preparation of CaO granules using the granulation method

ABSTRACT

Improving the hydration resistance of CaO particle in manufacturing and application of free CaO-containing materials has practical significance. In this study, CaO granules was made from Ca(OH)₂ particles, which were fabricated by the granulation method. The results showed that the hydration resistance of the CaO granules which was prepared under 1700?r?min^?1 was the best, the CaO granules was sintered well in calcination process, the shell of CaO granules was relatively dense, which improves the hydration resistance of CaO granules, and the rate of hydration weight increment was 0.58% after placed in the air for 20 days under a temperature of 10–14°C and a relative humidity of 57–81%.     

Facile synthesis and characterization of novel coronene chromophores and their application to LCD color filters

New coronene derivatives, diphenylcoronene tetracarboxdiimide and monophenylbenzoperylene tetracarboxdiimide, were synthesized from N,N′-bis(2,6-diisopropylphenyl)-1,7-dibromoperylene-3,4,9,10-tetracarboxdiimide via a one-step reaction. The suggested synthetic route is the simplest and most economical among the methods to extend the aromatic systems along the short molecular axis of perylene. The synthesized molecules exhibited superior stability and color strength as yellow chromophores. They were characterized by significant hypsochromic shifts of the absorption compared to perylene tetracarboxdiimide and high fluorescence quantum yields.