由乙烯裂解副产品轻质原料油中提取精萘

介绍了从乙烯副产的轻质燃料油中的取精奈的方法：通过精密精馏得到工业萘，再通过颁布结晶得到精萘。     

提高氯化钾产品质量的工艺研究

通过对氯化钾生产过程中光卤石及氯化钾的成核、结晶理论进行分析探讨,并结合生产实际,提出了利用TDB结晶技术生产光卤石和利用控速结晶技术生产优质氯化钾的理论并进行了工艺研究.实验证明,采用本工艺技术生产的氯化钾产品,其粒径达0.45mm以上、干基氯化钾含量达98%以上.     

ANALYSIS OF BATCH CRYSTALLIZATION PROCESSES

The analysis of batch crystallization processes normally requires the consideration of the time-dependent, batch conservation equations (e.g., population, mass, and energy balances), together with appropriate nucleation and growth kinetic equations. The solution of these integro-differential equations is relatively difficult, even by numerical techniques. This review outlines the advances that have been made in the experimental techniques and data analyses which can be used to study the crystallization kinetics and the crystal size distribution (CSD) in batch suspension crystallizers. Several simple and useful methods are discussed which include characterization of CSD maximum, cumulative CSD approach, SSBCR crystallizer, thermal response technique, maximum allowable growth rate, and desupersaturation curve technique.     

国内硝盐工业生产技术新进展

介绍近年来国内硝盐工业生产现状及主要技术成果,如碱液多次加碱多次吸收;两效蒸发工艺的应用;OSLO结晶器效益的分析等。指出存在的主要问题及发展建议。     

Efficient separation of enantiomers by preferential crystallization in two coupled vessels

The focus of this work is to study the enantioseparation of conglomerate forming systems using an innovative configuration for preferential crystallization. Two batch crystallizers are coupled by an exchange of their liquid phases. In each vessel one of the two enantiomers is seeded initially and crystallizes subsequently. Compared with conventional single batch crystallization the exchange of the crystal free liquid phases between two crystallizers leads to an increase of the concentrations of the preferred enantiomers and therefore to an increase of the driving forces for the crystallization. This enhances the productivity of the process compared with the conventional operation. © 2009 American Institute of Chemical Engineers AIChE J, 2009     

冶金严苛服役环境中热喷涂技术的应用现状及展望

以超音速火焰喷涂、大功率等离子喷涂等为代表的先进热喷涂技术,已成为冶金行业关键装备及部件在严苛服役环境下实现高温耐磨、耐腐蚀、抗结瘤、隔热等多功能化的关键技术.概述了不同热喷涂技术的基本原理及涂层特性,进而详细论述热喷涂技术在服役于严苛环境中的冶金关键设备(如连铸结晶器铜板、热镀锌铝锅组件及高温炉辊等)上的研究现状及应...