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我国聚氯乙烯行业现状与发展趋势 总被引:2,自引:0,他引:2
介绍了近年我国PVC树脂生产能力、产量、消费量、进出口,列出了主要企业产能,并与世界和日本、德国、美国的一些情况进行了比较。总结了我国PVC行业的特点,并提出了几点看法。 相似文献
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《化学工业与工程技术》2019,(1):17-23
介绍了丁二烯装置溶剂精制工艺流程,分析了溶剂精制系统中产生的焦油、丁二烯二聚物及废水三大污染源及其危害。制定并实施了工艺改进措施,经过改进排焦工艺、丁二烯二聚物脱除工艺、溶剂精制系统脱水工艺,实现了排焦作业密闭操作、减少了作业过程带来的现场异味污染、消除了焦油池内人工开挖焦油带来的高风险作业、减少了装置废渣生成量、COD排放总量得到了控制,达到了净化溶剂品质、规避环保风险、节约资源、环境友好的生产目标,提高了装置运行质量,同时丁二烯二聚物污染源转化为副产品销售,增加了装置的经济效益。 相似文献
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聚乙烯醇缩丁醛树脂的研究与应用 总被引:4,自引:0,他引:4
综述了聚乙烯醇缩丁醛树脂的生产原理、一步法、二步法生产工艺以及溶解法、沉淀法生产工艺, 并对不同生产工艺进行了比较;介绍了聚乙烯醇缩丁醛树脂的结构与性能的关系以及其在安全玻璃、胶粘剂、陶瓷花纸等领域的应用;概述了国内外发展现状、新技术的应用状况,展望了技术、应用的发展动态。 相似文献
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正本书比较全面地介绍了国内外粉末涂料与涂装的概况,详细介绍了粉末涂料的分类、品种、大量列举了粉末涂料基本配方组成;还论述了粉末涂料配方设计的基本思路;详细介绍了粉末涂料的制造设备和生产工艺、粉末涂装方法的分类;重点叙述了静电粉末涂装的设备和工艺、粉末涂料与涂装中的安全、卫生等问题;还介绍了粉末涂料与涂膜的检验方法。 相似文献
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主要介绍了醚化反应的机理,明确了反应温度、反应压力、醇烯比、空速等参数对异丁烯与甲醇反应生成甲基叔丁基醚(MTBE)这一个可逆放热反应的影响。从而优化了操作条件,该善了MTBE产品及醚后碳四产品质量、降低了生产成本、提高了经济效益。 相似文献
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对本文(I)报中MCSPT方程与物质有关的参数A_1、A_2、A_3、A_4和A_5给出了以偏心因子ω和临界压缩因子Z_c为关联因子的普遍化关联式,从而将MCSPT方程推广到极性、强极性物质热力学性质的预测.通过对72种物质饱和液体密度和151种物质液体蒸发焓的计算结果表明,MCSPT不仅能精确地预测物质的饱和性质,而且也能准确地计算焓差. 相似文献
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N. SHANKAR TIMOTHY J. WILTSHIRE R. SHANKAR SUBRAMANIAN 《Chemical Engineering Communications》2013,200(5-6):263-281
The problem of the dissolution or growth of an isolated, stationary, sphere in a large fluid body is analyzed. The motion of the boundary as well as the resulting motion in the liquid are properly taken into account. The governing equations are solved using a recently developed technique (Subramanian and Weinberg, 1981) which employs an asymptotic expansion in time. Results for the radius of the sphere as a function of time are calculated. The range of utility of the present solution is established by comparison with a numerical solution of the governing equations obtained by the method of finite differences. 相似文献
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在一定的工艺条件下,定性指出了纺丝箱体温度、计量泵温度与粘度降成正比。通过数理统计的回归分析法。找出了两条经验公式。 相似文献
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N. Shankar Timothy J. Wiltshire R. Shankar Subramanian 《Chemical Engineering Communications》1984,27(5):263-281
The problem of the dissolution or growth of an isolated, stationary, sphere in a large fluid body is analyzed. The motion of the boundary as well as the resulting motion in the liquid are properly taken into account. The governing equations are solved using a recently developed technique (Subramanian and Weinberg, 1981) which employs an asymptotic expansion in time. Results for the radius of the sphere as a function of time are calculated. The range of utility of the present solution is established by comparison with a numerical solution of the governing equations obtained by the method of finite differences. 相似文献
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E.A. Fesenko P.A. Barnes G.M.B. Parkes E.A. Dawson M.J. Tiernan 《Topics in Catalysis》2002,19(3-4):283-301
This paper summarises some applications of advanced thermal techniques for the characterisation and preparation of catalysts using different sample controlled thermal analysis (SCTA) methods. The techniques are applied to temperature programmed decomposition (calcination), oxidation, reduction, dehydration, desorption and reaction. SCTA methods can produce significant enhancements in the resolution of complex reactions, provide a detailed insight into the energetics of surface and bulk processes and, when applied to catalyst preparation, give improvements in the pore structure and uniformity of the resulting materials. The advantages and limitations of SCTA methods, in which the sample temperature or concentration of reactant gas is altered as some function of the rate of a thermally induced physico-chemical process, are discussed. 相似文献
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Erik M. Galimov 《International journal of molecular sciences》2009,10(5):2019-2030
This paper shows that the steady state of a system of conjugated reactions, which are characterized by disproportionation of entropy and proceed in the domain of linear interactions, is an attractor of ordering. Such systems are primed to produce ordering, and life is a specific manifestation of the sustained ordering inherent to the chemistry of carbon. The adenosine triphospate (ATP) molecule has properties which makes ATP hydrolysis to be most appropriate to form such a system in primitive world. Hence, ATP is suggested to play a key role in prebiological evolution. Principles of the origin and evolution of life following from the concept of ordering are stated. 相似文献