前景较好的特种PVC树脂

根据多年的实际工作经验,推荐了一些发展前景较好、市场需求旺盛、盈利水平不错的特种PVC树脂(如高白高透明PVC树脂、直接加工用PVC树脂、高抗冲PVC树脂、消光PVC树脂、高聚合度PVC树脂等),介绍了其性能特点、市场应用情况及改进措施等,建议PVC生产企业走差异化发展道路,积极研发特种PVC树脂,避开普通PVC树脂激烈的市场竞争,以提高PVC生产企业的经济效益。     

国内外PVC糊树脂生产现状、市场需求与预测

叙述了国内外PVC糊树脂生产及市场需求现状,指出了国内外PVC糊树脂生产与 应用的差距,从而提出了国内今后PVC糊树脂发展的方向。     

2008年中国PVC产业动态及分析

概括了2008年中国PVC行业的特点,介绍了2008年中国PVC产业的生产状况、供需状况、消费状况和市场情况。分析了2008年中国PVC行业状况、生产原料路线、相关产业政策及金融危机对中国PVC行业的较大影响,总结了中国PVC行业技术进展的情况。展望了中国PVC行业的发展形势,指出中国PVC行业已经进入整合期,进行结构调整并实现产业升级已成为当前中国PVC行业亟待解决的问题。     

"十三五"期间中国PVC产业回顾和展望(续完)

从生产、进出口、市场、应用等方面分析了国内PVC行业现状.介绍了国家有关PVC行业的政策.阐述了"十三五"期间国内PVC产业受国际环保、能源、低碳公约及国家环保、能源、产业政策等规范,产业升级改造逐步走向正轨.回顾了"十三五"期间PVC行业发生的重大生产、安全、环保、技术事件,并展望了"十四五"期间PVC产能增长的预期.列举了"十三五"期间PVC行业的主要实用生产技术,并分析了国内PVC行业存在的主要问题.     

PVC地板行业研究现状及发展趋势

概述了国内外PVC地板行业的生产及应用现状,比较了几种地板材料的优缺点,介绍了PVC地板生产技术的研究进展情况,分析了国内PVC地板行业的发展趋势。     

"十三五"期间中国PVC产业回顾和展望(待续)

从生产、进出口、市场、应用等方面分析了国内PVC行业现状.介绍了国家有关PVC行业的政策.阐述了"十三五"期间国内PVC产业受国际环保、能源、低碳公约及国家环保、能源、产业政策等规范,产业升级改造逐步走向正轨.回顾了"十三五"期间PVC行业发生的重大生产、安全、环保、技术事件,并展望了"十四五"期间PVC产能增长的预期.列举了"十三五"期间PVC行业的主要实用生产技术,并分析了国内PVC行业存在的主要问题.     

特种聚氯乙烯树脂生产概况

简述了国内外主要特种聚氯乙烯树脂(包括高聚合度PVC树脂、消光PVC树脂、PVC掺混树脂、氯乙烯一醋酸乙烯共聚树脂和氯化PVC树脂)的生产情况。并列举了主要特种PVC树脂的生产厂商、牌号和技术规格。     

用离型纸法生产PU/PVC复合人造革

介绍了PVC人造革的品种和生产方法的分类及PU/PVC人造革的发展状况,重点阐述了PU/PVC复合人造革的特点、生产原料及配方、主要生产设备及其作用、工艺流程及技术要点和注意事项.     

分散剂对PVC树脂产品质量的影响

简述了PVC树脂生产原料的工艺指标及分散剂在VCM聚合中的作用,调整了采用70 m3聚合釜生产PVC树脂的工艺配方,并对生产出的PVC树脂产品质量进行了检测。结果表明:PVC树脂颗粒形态规整,内部结构疏松,表观密度为0.53~0.54 g/mL,黏数为112~114 mL/g,100 g PVC树脂增塑剂吸收量为23~25 g,"鱼眼"数小于10个。     

中国PVC产业快速发展10年回顾与2010年动态分析

回顾了2000-2010年10年间中国从PVC进口国发展成为PVC生产和消费第一大国的发展历程,分析了中国PVC产业的产能、产量、消费及技术进步状况,指出中国PVC产业的国产化技术在国际上已具备较强的竞争力,经过市场的调整和整合,中国PVC产业正由快速发展期向成熟期过渡,将向世界PVC生产强国迈进。     

CONTINUOUS PRODUCTION OF DISSOLVED OXYGEN-FREE WATER USING RAMOND SUPERMIXER®

The process of continuous production of dissolved oxygen free water was investigated by means of desorption of dissolved oxygen into fine nitrogen bubbles generated in a novel motionless mixer named Ramond Supermixer® (RSM). The pressure drop across the mixer (ΔP_SM) and the volumetric mass transfer coefficient (k_La) during the desorption of oxygen from water were measured for various combinations of process variables; liquid and gas velocities and number of mixing units. The k_La during absorption was smaller by less than approximately 6% than that during desorption. Specific gas-liquid interfacial areas (a) were measured by the chemical absorption method for a CO₂-aqueous sodium hydroxide solution system. Such process characteristics as ΔP_SM, k_La, and a were correlated with the process variables and compared with those available in the literature. To further confirm the mass transfer characteristics in RSM, the desorption of oxygen from aqueous electrolyte solutions was also investigated. All the correlations obtained for k_La during the desorption of oxygen from water and aqueous electrolyte solutions were compatible to a great higher extent.     

氯化氢生产工艺探讨

简介合成法与解吸法生产氯化氢的工艺流程，并对其产品进行了比较，分析了两种生产工艺的特点，并提出改进措施。     

斯塔米卡邦和斯纳姆尿素装置解吸水解技术的对比与分析

阐述了尿素生产装置工艺冷凝液解吸水解技术原理,从操作条件、设备特点、外送废水质量以及设备投资等方面对斯塔米卡邦和斯纳姆尿素工艺冷凝液解吸水解技术进行了对比和分析,论述了上述2种解吸水解工艺在装置运行中的常见问题及解决措施。     

基于水全循环的尾氯脱吸工艺

介绍了尾氯脱吸工艺在PVC生产中的应用情况及存在的问题。结合PVC水碱洗工序生产装置的特点,提出了水平衡的观点。设计了基于水全循环的尾氯脱吸工艺。初步探讨了水循环尾氯脱吸工艺的操作运行。     

基于水全循环的尾氯脱吸工艺

(接上期)从氯化氢气体合成的角度看,在尾氯脱吸系统中,由于工艺设计为防止泡罩塔在吸收氯化氢尾气时顶部产生酸雾,提高氯化氢气体的吸收率,采用吸收水(软水)进行喷淋吸收,这部分水最终以浓盐酸的形     

The loss rate by sublimation of mercuric chloride adsorbed on activated carbon

This paper reports on the directly measured loss rate by sublimation of mercuric chloride supported on the surface of activated carbon in the process of synthesizing vinyl chloride. An equation is derived for the sublimation rate. The result coincides with the practice in production and the data in literature. The desorption heat was calculated from the desorption equilibrium data by means of the Clausius—Clapeyron equation. It was found that the desorption heat is related to the degree of coverage of mercuric chloride and the average heat value is identical with the evaporation heat. This research provides some fundamental data for research into catalyst deactivation caused by the loss of active species.     

盐酸深解吸工艺的改进

简述常规的浓盐酸解吸工艺和传统的稀盐酸深解吸工艺,建议对现有处理工艺中产生的大量质量分数为1％的盐酸废液在氯化钙浓缩釜中用氢氧化钙中和后再蒸发,改进后,采用碳钢设备,不产生废液,实现了清洁生产,降低了成本.     

Pd(II) ion adsorption onto emulsion gel beads in a fixed bed

We developed previously an emulsion gel adsorbent for improved metal adsorption. This study focuses on a continuous adsorption–desorption process of metal ions from a solution onto emulsion gel beads using the fixed-bed method. The monodisperse millimeter-sized emulsion gel beads, a polymeric hydrogel containing randomly distributed oil microdroplets of di-n-hexylsulfide as an extractant, were prepared using an automatic production method combining sedimentation polymerization and two-fluid atomization. The isotherms and the kinetics for Pd(II) adsorption were investigated. A continuous adsorption–desorption process was successfully demonstrated, and the breakthrough curve was successfully predicted by a mathematical analysis.     

副产盐酸解吸制氯化氢技术及应用

介绍了副产盐酸解吸制取氯化氢技术的应用背景及意义;叙述了盐酸常规解析、变压精馏和萃取精馏制取气态氯化氢的基本原理和工艺流程;对各种方法作了比较并说明了适用条件,对生产工艺、设备及材料的选择提出了建议;提出了副产盐酸解吸制取氯化氢应用的注意事项及改进建议.     

盐酸深度脱吸装置在PVC生产中的应用及改进

介绍了盐酸深度脱吸的原理与工艺流程及其在PVC生产中的应用,总结了盐酸深度脱吸工艺与设备的改进措施。