Reaction of hydroxymethylanthraquinones with thionyl chloride

The reaction of thionyl chloride with some hydroxymethylanthraquinone derivatives was investigated. The reaction product was found to be dependent on other ring substituents and on the reaction temperature. In the case of amino derivatives and at lower temperatures, chlorosulphinylmethylanthraquinones were obtained; while at higher temperatures, chlorination of the anthraquinone nucleus occurred. Hydroxy derivatives gave only chloromethyl compounds.     

1,4-二氯蒽醌水解制备1,4-二羟基蒽醌

以廉价的对二氯苯和邻苯二甲酸酐为原料制得1,4-二氯蒽醌,经硼酸催化水解得到1,4-二羟基蒽醌。系统地考察了反应温度、硫酸浓度、原料摩尔比和反应时间对氯转羟基反应的影响。确定了氯转羟基反应制备1,4-二羟基蒽醌的优化实验条件为：以95%浓硫酸为溶剂,在反应温度为220℃、硫酸∶1,4-二氯蒽醌∶硼酸（摩尔比）为37.5∶1.0∶1.4、反应时间为60min的条件下,以1,4-二氯蒽醌计的产物收率为71.0%。探讨和解释了硼酸催化作用下氯代蒽醌转换成羟基蒽醌可能的机理。     

氯化亚砜生产技术进展

简要叙述了国内外氯化亚砜合成方法、提纯技术和尾气处理方面的技术进展情况,按年代顺序介绍了各种技术的开发情况,并进行了简单评价.提出我国尚需提高氯化亚砜生产装置的整体科技水平.     

影响氯化亚砜产量的因素

分析了影响氯化亚砜产量的因素（物料配比和反应温度）,并实施了提高产量的改进措施.改造后,氯化亚砜年产量由3 600t提高至4 680 t.     

氯化亚砜的生产与应用

介绍了氯化亚砜生产工艺、应用与市场,并对氯化亚砜今后的发展提出建议.     

氯化亚砜的生产现状及其发展前景

介绍了氯化亚砜的生产现状及工艺特点 ,并对各种工艺进行了比较。简述了氯化亚砜的应用情况 ,并展望了市场发展前景     

The solubility of lithium chloride in 1.8M lithium tetrachloroaluminate in thionyl chloride

The solubility of LiCl in a 1.8M solution of LiAlCl₄ in SOCl₂ has been determined by a variety of methods. The solubility is discussed in relation to the morphology of the LiCl passivating layer on Li metal.     

氯化亚砜的生产、应用及市场

介绍了无机精细化工产品氯化亚砜在医药、农药等工业领域的应用及其在有机合成反应、成环 (或闭环 )反应中的应用开发现状 ;评述了氯磺酸法、三氧化硫法、二氧化硫法、联产法等氯化亚砜合成方法及其采用这些合成方法的生产企业情况 ;分析了氯化亚砜国内生产、需求、进出口情况。建议尽快淘汰落后的氯磺酸法工艺 ,新建装置应考虑原料来源、规模效益等因素并采用先进工艺技术。     

Synthesis and characterization of poly(1,4-dihydroxyanthraquinone terephthalate)

A novel polymeric dye containing an anthraquinone ring was prepared by solution polycondensation. The molecule geometry was fully optimized on the basis of the AM1 method. The hydrogen bond was formed and retained coplanarity in the molecular structure. In its UV spectrum, a large hypsochromic shift and a hypochromic effect were observed due to polyesterification. The polymeric dye was also characterized by means of IR and TG. Its thermal degradation mechanism was elucidated. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 2246–2248, 2001     

反式-1,4-聚异戊二烯的氯化改性

采用水相悬浮法，在常压下对反式-1，4-聚异戊二烯（TPI）进行氯化改性。研究了温度、时间、粒径等对氯化反式-1，4-聚异戊二烯（CTPI）氯含量的影响。得到适宜的反应条件是：采用两阶段升温的方法，控制一定的通氯量，第一阶段，反应温度为35℃，反应时间为2～3h；第二阶段．反应温度为50～55℃，反应时间为1～6h，可获得氯质量分数在50％以内的CTPI，产品为可溶解的白色疏松颗粒。     

联产法生产氯化亚砜的合成工艺及经济评价

综述了氯化亚砜的 3种生产工艺 ,并对其进行了技术分析和经济评价。重点介绍了联产法生产工艺的原理、设备选择、三废处理等内容     

氯化亚砜精馏系统技改总结

总结了对氯化亚砜精馏系统进行的技改,对比了技改前后的产品质量。     

连续联合制备氯化亚砜和三氯氧磷新工艺

为提高联合制备氯化亚砜和三氯氧磷间歇工艺的生产效率,采用多段釜式或塔式连续反应器,以三氯化磷为原料,通入二氧化硫和氯气,连续合成三氯氧磷和氯化亚砜。实验结果表明:氯化亚砜含量达到国家标准一级品指标,三氯氧磷质量分数达到99%以上,产品收率>90%。该工艺具有收率高、质量好、连续生产的优点,宜于规模化生产,是一种值得推广应用的工业制备方法。     

氯化亚砜生产装置中过硫器结构的改造

针对氯化亚砜生产过程中精馏系统塔顶过硫器硫黄分布不均匀问题,提出了改造过硫器结构的方案。改造后,通过控制工艺指标和改变操作方式,氯化亚砜月产量由340t提高到365t,产品优级品率达95％以上。     

16m~3蒸馏釜生产氯化亚砜工艺

介绍中平能化开封东大化工有限公司采用16 m3蒸馏釜生产氯化亚砜的情况,最佳工艺参数为:0.5MPa蒸汽,加热至80℃,全回流时间为3～4 h,采出时间为10～12 h,初馏分采出时间为1.5～2 h。     

隔板精馏塔分离氯化亚砜的模拟及工艺优化

利用AspenPlus软件对常规的两塔间接序列精馏工艺分离氯化亚砜进行了模拟计算,并提出了一种新型分离工艺—隔板精馏塔工艺。通过对隔板精馏塔的模拟计算,研究了预分离段进料位置、侧线采出位置、回流进料比和分配比对产品纯度和再沸器能耗的影响,结果说明最佳的工艺条件为:预分离段第6块板进料,主塔第55块板采出,回流进料比为4.45,液相分配比为1.60,汽相分配比为1.98。将隔板塔在最佳操作条件下的能耗与常规两塔工艺操作能耗和设备投资进行比较,隔板精馏塔节约冷凝器负荷和再沸器负荷分别为34.62%和34.64%;然后运用专业的设备投资计算软件CAPCOST计算2种工艺设备投资,结果表明,隔板精馏塔新工艺可以降低17.27%的设备投资。综上可知隔板精馏分离氯化亚砜是一种节能、高效的新型分离工艺。     

氯化苄氯化技术进展分析

介绍了氯化苄氯化机理及技术发展，重点分析了反应精馏型氯化装置的能耗。经过比较认为液相塔式氯化技术更具竞争力。     

Removal of disinfection by-products precursors by polyaluminum chloride coagulation coupled with chlorination

The effect of coagulation coupled with chlorination (i.e., pre-, inter-, and post-chlorination) on the formation of disinfection by-products (DBPs) and the removal efficiency of DBPs precursors were investigated. Compared with coagulation coupling with pre-chlorination, coagulation coupled with inter-chlorination could lead a higher removal efficiency of dissolved organic carbon (DOC), specific ultraviolet absorbance (SUVA) and chloroacetic acids formation potential (CAAsFP). The CAAsFP/DOC value of residual DOC showed that coagulation with inter-chlorination has a beneficial effect on CAAs precursors removal. More DBPs were produced during inter-chlorination than that of pre-chlorination at pH 7.5, while less DBPs were produced during inter-chlorination than that of pre-chlorination at pH 5.5. In addition, the precipitate of humic acid (HA) after coagulation was chlorinated to study the kinetics of chlorine decay. The results showed that coagulated-HA had a higher reactivity with chlorine than aqueous-HA at pH 7.5. Furthermore, the trends of zeta potential during coagulation process suggested that the distribution of chlorine species had significant influence on the removing of DBPs precursors by coagulation coupled with chlorination.