醋酸乙烯生产技术发展综述

详细介绍了醋酸乙烯生产技术的发展历程,对醋酸乙烯主要的生产工艺路线进行了对比,认为乙烯气相法Leap工艺和VAntage工艺是目前最先进的生产工艺,指出醋酸乙烯生产技术未来的发展趋势。分析了我国醋酸乙烯的研究、生产和发展情况,并对我国醋酸乙烯工业的发展提出了建议。     

我国醋酸乙烯生产现状及其发展趋势

从生产方法、所使用催化剂、生产厂家、消费情况4个方面介绍了我国醋酸乙烯生产的现状,并对我国醋酸乙烯生产的发展趋势进行了分析.     

我国醋酸乙烯市场分析及预测

分析了我国醋酸乙烯市场的供需、消费、价格及进出口情况.对我国醋酸乙烯行业在世界经济危机大环境下的状况及未来发展态势进行了分析和预测.     

我国醋酸主要下游产品的进出口分析

醋酸是一种重要的化工中间体,以其为原料可以生产许多用途广泛的化工产品。本文分析了2010年我国醋酸乙烯、精对苯二甲酸、醋酸乙酯、醋酸丁酯以及醋酸酐等醋酸主要下游产品的进出口情况。1醋酸乙烯2010年我国醋酸乙烯的总进口量为257669.824吨,同比2009年的256110.842吨增长约0.61%。其中进口量最多的是11月份,进口量为38038.607     

我国醋酸乙烯及聚乙烯醇进出口分析

分析了2022年我国醋酸乙烯及聚乙烯醇的进出口情况。     

醋酸乙烯的生产消费与技术进展

介绍了国内外醋酸乙烯的生产、消费及市场情况,分析并比较了醋酸乙烯的各种生产方法,综述了生产技术的进展情况,提出了几点发展建议。     

我国醋酸乙烯和聚乙烯醇进出口分析

从进出口数量、进出口国家或地区以及进出口海关等方面分析了2017年我国醋酸乙烯和聚乙烯醇的进出口情况。     

我国醋酸乙烯乳液工业之发展

本文回顾了醋酸乙烯乳液发展历史;介绍了我国醋酸乙烯乳液工业的现状和对未来前景的展望;对如何发展我国醋酸乙烯乳液提出了二点建议。     

浅谈醋酸乙烯生产技术

介绍了国内外合成醋酸乙烯（VAc）的生产技术进展情况。对比不同生产工艺路线及其优缺点，同时提出了合成醋酸乙烯技术的选择原则。阐述了未来醋酸乙烯合成技术的发展趋势。     

醋酸乙烯的供需现状及国内市场前景

分析了国内外醋酸乙烯的生产、消费现状及国内市场前景,提出了我国醋酸乙烯行业的发展建议。     

氯乙烯-醋酸乙烯酯共聚物的后功能化研究

通过将氯乙烯－醋酸乙烯酯－丙烯酸羟乙醋共聚物（VAGF）与马来酸酐酯化接枝，制得带羟基的氯醋三元共聚物。探索了原料配比、催化剂用量、反应时间及反应温度对酯化接枝反应的影响，并用红外光谱进行表征。得到酯化反应的最佳条件为：催化剂用量为VAGF质量的0．8％，VAGF质量分数为15％，温度100℃，时间9h。氯乙烯－醋酸乙烯酯－丙烯酸羟乙酯三元共聚物的马来酸酐酯化活性高于氯乙烯－醋酸乙烯酯－乙烯醇三元共聚物。     

酯溶性氯乙烯-醋酸乙烯酯共聚树脂的研发生产

对比进口与国产氯乙烯-醋酸乙烯酯共聚树脂的常规性能和应用性能,查找了国产氯醋树脂质量差距;针对氯乙烯和醋酸乙烯酯悬浮聚合过程提出了优化措施,改善了氯醋树脂的颗粒形态和分子组成的均匀度,进而提升了酯溶性等应用性能.     

Comment on radical polymerization mechanism of vinyl benzoate

Summary The elementary rate constants for the radical polymerization of vinyl acetate and vinyl benzoate have been determined in various aromatic solvents and ethyl acetate. The kp values for vinyl benzoate are larger than those for vinyl acetate in all solvents, although methyl affinities of both monomer were similar. These results show that the poly(vinyl benzoate) radical is more reactive than the poly(vinyl acetate) radical.     

Physicochemical characterization of hydrogels based on polyvinyl alcohol–vinyl acetate blends

Hydrogels made of polyvinyl alcohol–vinyl acetate and its blends with water soluble polymer were studied in terms of swelling behavior, microstructure, and dynamic mechanical properties. Hydrogels prepared by blending polyvinyl alcohol–vinyl acetate with either polyacrylic acid or poly(4‐vinyl pyridine) exhibited a strong pH dependency. When poly(vinyl pyrrolidone) was used for blending, an unusual pH dependency was observed. An increase in the equilibrium water content in all systems resulted in an increase in the freezable water as determined by DSC. Critical point drying led to a striated surface on polyacrylic acid–polyvinyl alcohol–vinyl acetate hydrogels, whereas a porous structure was observed on the freeze‐dried poly(vinyl pyrrolidone)–polyvinyl alcohol–vinyl acetate gels. Hydrogels with elevated storage modulus were obtained when either polyvinyl alcohol–vinyl acetate alone or polyacrylic acid–polyvinyl alcohol–vinyl acetate blends were thermally treated at high temperatures (i.e., 150°C). Low storage modulus was observed for both poly(vinyl pyrrolidone) and poly(4‐vinyl pyridine)‐containing hydrogels. Temperature dependency of storage modulus from 20 to 60°C was observed only for poly(4‐vinyl pyridine)–polyvinyl alcohol–vinyl acetate hydrogels. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 3578–3590, 2001     

醋酸下游产品综合开发技术方案探讨

以煤基甲醇羰基合成醋酸过程为基础,设计了一种醋酸乙烯及其衍生物的综合开发方案。对方案中所涉及的醋酸乙烯、聚醋酸乙烯、聚乙烯醇和醋酸乙烯-乙烯共聚物4个主要醋酸下游产品的生产工艺现状进行总结,并结合资源分布及产业政策的实际情况,分析和比较了每种产品不同的工业化生产路线,为相关醋酸乙烯及其衍生物开发项目的方案设计和技术路线的确定提供参考。     

醋酸乙烯生产技术的研究进展

文章简要回顾了醋酸乙烯的生产技术,从新原料路线、催化剂新技术方面介绍了近年醋酸乙烯合成的技术研究现状和特点,同时展望了醋酸乙烯合成技术的发展方向.     

Study of Vinyl Acetate Partitioning in Emulsion Copolymerization of Vinyl Chloride-Vinyl Acetate by FTIR and HNMR Spectroscopy

Emulsion copolymerization of vinyl chloride with vinyl acetate comonomer was performed. Potassium persulfate, a mixture of stearyl alcohol and sodium lauryl sulfate, was used and reactions were performed at 55 °C in a pressurized reactor. By sampling during the reaction in different intervals copolymer composition was investigated using FTIR and NMR spectroscopy. The results showed that the partitioning of vinyl acetate in the copolymerization in general follows the Mayo-Lewis copolymerization equation with some discrepancy. This was attributed to the gaseous nature of vinyl chloride monomer and the differences between polymerization in heterogeneous and homogeneous systems. Both FTIR and NMR spectroscopy showed two peaks in vinyl acetate content of copolymer beyond 65% conversion which was attributed to the elimination of vinyl chloride droplets in the media and replacing them with vinyl acetate monomer. The first increase is related to the consumption of vinyl chloride droplets and the second is related to the consumption of gaseous vinyl chloride; in both instances vinyl acetate governs the polymerization.     

醋酸乙烯生产技术进展及其市场前景

醋酸乙烯（VAc）是世界上产量最大的有机化工原料之一，作为重要的有机化工原料，主要用于生产聚醋酸乙烯（PVAc）、聚乙烯醇（PVA）、乙烯-醋酸乙烯共聚物（VAE）、氯乙烯-醋酸乙烯共聚物（EVC）、聚丙烯腈共聚单体等衍生物，这些衍生物的用途十分广泛，可用于涂料、浆料、粘合剂、维纶、薄膜、乙烯基共聚树脂、缩醛树脂等化工产品，