国内首套四氯化碳转产四氯乙烯装置投产

8月29日，昊华西南化工有限责任公司又一新产品四氯乙烯（PCE）首车发运，这标志着该公司在国内率先将四氯化碳（CTC）转产四氯乙烯（PCE），并实现工业化生产，填补了国内CTC转产PCE技术的空白。项目建成达产后预计每年可处理四氯化碳上万吨，年销售收入可达近亿元。     

四氯化碳转化与处理技术

介绍了国内外四氯化碳转化与处理技术，重点介绍了以四氯化碳为原料合成氯仿和合成四氯乙烯的技术进展情况。     

首套四氯化碳转产四氯乙烯装置投产

昊华西南化工有限责任公司又一新产品四氯乙烯(PCE)首车发运,这标志着该公司在国内率先将四氯化碳(CTC)转产四氯乙烯(PCE),并实观工业化生产,填补了国内CTC转产PCE技术的空白。项目建成达产后预计每年可处理四氯化碳上万吨,年销售收入可达近亿元。该项目将为国内甲烷氯化物企业     

四氯化碳转化与处理技术

本介绍国内外四氯化碳转化与处理技术,重点介绍了以四氯化碳为原料合成氯仿和四氯乙烯技术进展.     

DZ系列低压空气雾化比例调节燃烧器的改进

１概述专利产品高效节能ＤＺ系列低压空气雾化比例调节燃烧器,在燃烧工作范围内,有恒定的效率,节油率在８％～１７％之间。主要特点：１．采用具有独特的风展薄膜燃油雾化方式,火焰悬浮燃烧,燃油燃烧完全、温度场均匀,火焰稳定;２．可任意改变火焰长短,实现燃烧性...     

比例调节泵改进前后粘损情况研究

目前,聚合物注入的流程中很大部分采用比例调节泵,注入过程中出现泵出口、静混出口与井口粘度低,粘度波动较大等问题。经过实验分析,对比泵前后、静混前后、井口前后的粘度差异,得出这一问题的主要原因是比例调节泵。对比例调节泵进行改进后,粘损下降明显。     

热点产品推荐之四——四氯化碳处理与转化产品

1 背景资料 四氯化碳是甲烷氯化物的一种，主要用于生产氟致冷剂CFC-11和CFC-12，为了保护臭氧层，国际社会制定了《关于消耗臭氧层物质的蒙特利尔议定书》，作为缔约国之一我国将在2010年完全淘汰CFC-11和CFC-12。     

磷酸二铵产品养分含量的快速调节方法

针对磷酸二铵生产过程产品总养分含量的波动,结合生产过程分析结果,阐述了快速调节磷酸二铵产品养分含量的方法。对养分含量超标(w(总养分)64.3%)情况,采用加入硫酸或磷酸一铵渣,以及提升产品水含量的方法降低养分含量;对养分含量低(w(总养分)63.9%)的情况,采用降低产品水含量,或调节N、P质量比的方法提升总养分含量。两种方法皆可快速、有效地使磷酸二铵产品w(总养分)接近64.0%。     

四氯化碳催化加氢研究进展

从四氯化碳选择性加氢脱氯催化剂的活性组分、反应机理和催化剂失活及预处理等方面详细介绍了四氯化碳选择性加氢脱氯反应及催化剂的最新研究进展,简述了反应温度、压力和n(H2)/n(CCl4)比对四氯化碳催化加氢产品分布的影响,并指出了四氯化碳选择性加氢脱氯反应的发展方向。     

Kinetics and mechanism of the charge‐transfer polymerization of methyl methacrylate initiated with n‐butyl amine and carbon tetrachloride catalyzed by palladium dichloride

We studied the kinetics and mechanism of the charge‐transfer polymerization of methyl methacrylate (MMA) initiated with n‐butyl amine (BA) and carbon tetrachloride (CCl₄) catalyzed by palladium dichloride (PdCl₂ or Pd^II) in a dimethyl sulfoxide medium by using a dilatometric technique at 60°C. The rate of polymerization (R_p) was a function of [MMA], [BA], [CCl₄], and [Pd^II]. The kinetic data indicated a mechanism involving the possible participation of the charge‐transfer complex formed between the {BA–Pd^II} complex and CCl₄ or monomer in the polymerization of MMA. In the absence of either CCl₄ or BA, no polymerization of MMA was observed under these experimental conditions. R_p was inhibited by hydroquinone; this suggested a free‐radical initiation. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

Explorations of surface and cavity properties on the nucleate boiling of carbon tetrachloride

Natural convection and pool boiling heat transfer were observed on centrally heated, flat superfinished nickel surfaces using thoroughly degassed, spectroscopic grade carbon tetrachloride at 0.5, 1, and 1.5, atm. pressure. Three distinct modes of natural convective circulation were observed and surface superheats as high as 125°F. were recorded. Single and multiple cylindrical cavities (0.0002 to 0.001 inch in diameter) served as active nuclei. Each cavity exhibited characteristic ebullition and disarming temperature excesses which were indicative of critical internal geometries.     

二硫化碳-四氯化碳精馏过程模拟与优化

为实现二硫化碳氯化工艺中产生的二硫化碳和四氯化碳的完全回收,利用Aspen Plus软件对二硫化碳、四氯化碳混合物的精馏工艺进行了模拟计算.分析了理论塔板数、进料口位置、回流比对分离效果的影响,选出最适宜的工艺条件:理论塔板数为21块,进料口位于第9块塔板,回流比为1.9.在该工艺条件下,塔顶温度为46.9℃,二硫化碳...     

我国四氯化碳现状和出路

通过对国内四氯化碳产能、产量、原料路线、用途和用量等现状的分析，提出了四氯化碳的出路，同时介绍了焚烧技术和以四氯化碳为原料特产氯仿、四氯乙烯、一氯甲烷、HFC—236af、肉桂酸等产品的最新进展。     

n-C7H16/CCl4热解处理对粘胶基碳纤维性能的影响

采用浸渍热解法,以n-C_7H_(16)/CCl_4为热解质,讨论浸渍液体积比、热解温度等对粘胶基碳纤维(RCF)拉伸性能的影响。结果表明,经热处理后纤维线密度降低,表面缺陷减少,当n-C_7H_(16)/CCl_4为2:3(体积比),热解温度900～1100℃时,碳纤维拉伸强度可提高17％。用韦氏统计理论对强度分布进行分析.证实经热解处理后,RCF强度分布更集中,均匀性更好。     

The removal of carbon tetrachloride from chlorinated polyisoprene using carbon dioxide

This study demonstrates the use of supercritical carbon dioxide in the removal of residual carbon tetrachloride from chlorinated polyisoprene in a packed column. The effects of varying temperature and pressure on the efficiency of extraction are examined. The data indicate that there exists an optimum combination of pressure and temperature and that quite small deviations from these conditions can produce substantially poorer extraction efficiency and lead to the destruction of the polymer particle morphology.     

Hepatic Δ9 and Δ6 desaturase activities during the recovery period following carbon tetrachloride poisoningdesaturase activities during the recovery period following carbon tetrachloride poisoning

The liver microsomal Δ⁹ and Δ⁶ desaturase activities have been studied in rats with carbon tetrachloride-induced hepatitis. Immediately after poisoning, significant decreases were observed for both types of desaturase activity. However, recovery kinetics were slower for the Δ⁶ desaturase than for the Δ⁹ desaturase. The activities of NADH-ferricyanide and NADH-cytochrome C reductases, proteins involved in the electron transfers associated with microsomal desaturation, were also measured. There was a fall in both activities after poisoning, but this decrease was less than that of the desaturase activities.     

CCl4低温氯化人造金红石制备TiCl4

为了开发低温钛氯化工艺及解决工业副产物CCl₄的再利用问题,在固定床和流化床反应器中考察了自贡法人造金红石原料与CCl₄低温氯化制备TiCl₄的反应过程,利用SEM、XRD、XPS等手段表征了人造金红石原料在反应前后的变化。结果显示,在450～500℃下,自贡法人造金红石能与CCl₄快速反应生成TiCl₄产品。少量Fe元素的掺杂是金红石相具备较高反应速率的关键原因。人造金红石原料制备过程中的弱氧化焙烧处理在颗粒表面形成的惰性金红石壳层,导致TiCl₄收率极限为90%,但该壳层能在酸解过程以及低温CCl₄氯化过程中维持颗粒粒度,使该原料能用于流化床操作。此过程具有显著的环保价值和工业应用前景。