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裴福沪 《石油化工技术经济》2007,23(4):42-44
使蚕丝蛋白与丙烯腈在硫氰酸钠水溶液中共聚,得到蚕丝蛋白丙烯腈共聚物。实验表明,随着蚕丝蛋白质量分数的增加,共聚物的非水溶性下降。用蚕丝蛋白质量分数为75%的蚕丝蛋白改性丙烯腈共聚物溶液以不同比例与常规腈纶纺丝原液共混并纺丝,得到蚕丝蛋白质量分数不同的蚕丝蛋白改性聚丙烯腈纤维(SPMAF)。对SPMAF的分析测试表明。当蚕丝蛋白的质量分数超过20%时,纤维的断裂强度开始明显下降;蚕丝蛋白的质量分数对SPMAF的断裂伸长的影响不大;蚕丝蛋白的引入可以大大提高SPMAF的保水和导湿性能。 相似文献
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丙烯腈(ACN)是一种重要的有机化工中间体,主要用于生产丙烯腈纤维、丙烯腈-丁二烯-苯乙烯共聚物(ABS)和苯乙烯-丙烯腈树脂(SAN)。当前丙烯氨氧化工艺是丙烯腈的主流商业化生产工艺。世界上大多数丙烯腈生产装置均采用BP公司的Sohio工艺,该工艺可以将丙烯、氨和空气转化成丙烯腈以及乙腈和氰氢酸等副产品。其它专利许可商还包括旭化成公司和Solutia公司。 相似文献
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我国苯乙烯生产消费现状及市场前景 总被引:1,自引:0,他引:1
乙烯(SM)是一种重要的基本有机化工原料,主要用于生产聚苯乙烯树脂(PS)、丙烯腈-丁二烯-苯乙烯三元共聚物(ABS)、苯乙烯-丙烯腈共聚物(SAN)树脂、离子交换树脂、不饱和聚酯以及苯乙烯系列橡胶(SBR、SBS)等。此外。还可用于制药、染料、农药以及选矿等行业。用途十分广泛。 相似文献
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丙烯腈(ACN)是一种重要的有机化工中间体,主要用于生产丙烯腈纤维、丙烯腈-丁二烯-苯乙烯共聚物(ABS)和苯乙烯-丙烯腈树脂(SAN)。当前丙烯氨氧化工艺是丙烯腈的主流商业化生产工艺。世界上大多数丙烯腈生产装置均采用BP公司的Sohio工艺,该工艺可以将丙烯、氨和空气转化成丙烯腈以及乙腈和氰氢酸等副产品。其它专利许可商还包括旭化成公司和Solutia公司。据总部位于伦敦的Tecnon Or-biChem公司分析师Marjorie Walker表示,由于装置关闭导致产能减少量超过新增产能的数量,近年来全球丙烯腈市场已出现供应趋紧的局面,装置的开工率也已处… 相似文献
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醋酸乙烯单体(Vinyl Acetate Monomer,简称VAM)是一种无色透明。易燃性液体。用途非常广泛,可应用于涂料、粘合剂、纺织品、纸张、薄膜和口香糖等,同时还可聚合成聚醋酸乙烯酯(PVAC)、聚乙烯醇(PVA)、聚乙烯缩醛类化合物、乙烯-醋酸乙烯共聚物(EVA)、氯乙烯-醋酸乙烯共聚物、丙烯-醋酸乙烯共聚物等各种不同的聚合物。 相似文献
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以聚苯硫醚纤维和不锈钢纤维混纺纱为基础,设计并织制了不同混纺比、不同排列方式、不同组织的织物;测试了不同规格织物的抗静电性能、防电磁辐射性能和阻燃性能等功能性指标,分析了上述性能实现的影响因素及其作用机理。研究结果表明,不锈钢纤维含量对织物抗静电性能、防辐射性能影响显著,且织物抗静电性能、防辐射性能随不锈钢含量的增加而增强,但不锈钢纤维含量对织物的阻燃性能影响不显著;混纺纱的排列方式、织物组织对织物的防电磁辐射性能影响显著,混纺织物具有良好的阻燃性能。 相似文献
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国内外醋酸乙烯生产应用及市场分析 总被引:1,自引:0,他引:1
沈菊华 《石油化工技术经济》2006,22(1):35-39
醋酸乙烯作为重要有机原料品种之一,需求增长较快,在我国发展前景看好。文章对国内外醋酸乙烯生产技术发展动向和市场供需作了综述,对国外固定床乙烯法和上正在开发的流化床乙烯法制醋酸乙烯的生产技术作了评述,指出国内在开发固定床技术的同时应重视流化床乙烯法制醋酸乙烯的技术开发。 相似文献
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顾文兰 《石油化工技术经济》2010,(4)
采用丙烯腈(AN)-丙烯酸甲酯(MA)-衣康酸(IA)三元共聚,NaSCN一步法湿法纺丝工艺路线进行聚丙烯腈(PAN)基大丝束原丝的工业化试验,确定了工艺条件,形成了工业化生产技术。与进口产品相比,大丝束原丝的金属杂质含量和均匀性指标偏高,需要对关键设备进行研究,以更好地满足生产需要。 相似文献
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凝胶纺丝法制备聚丙烯腈基碳纤维原丝的研究 总被引:1,自引:0,他引:1
利用凝胶纺丝方法制备了聚丙烯腈基碳纤维原丝。采用纤维截面摄影、扫描电子显微镜(SEM)分析、溶解速度测定等方法对凝胶纺所得丝条的截面结构形态进行表征。结果表明,采用凝胶纺所得的丝条,截面形状为圆形,且表里结构均一。 相似文献
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The certification test standards that presently exist for flame arresters are highly inadequate for inline applications. A proper flame arrester test method should ensure that a unit will work with any flame front conditions that it could be exposed to in actual use. When evaluating flame arrester performance, it is just as dangerous to neglect deflagration testing as detonation testing. The comprehensive inline flame arrester test method outlined here involves exposing a unit to the entire flame propagation pressure spectrum. This includes low, medium and high pressure deflagrations as well as overdriven and stable detonations. The test method also takes into account the following factors: flow restriction on the protected side of the flame arrester, flame propagation through a flowing gas, initial system pressure and temperature, and specified gas mixture. Flow restriction on the protected side of the flame arrester has a very significant effect on performance and has not previously been given consideration in flame arrester testing. Besides moving flame front test, endurance burn testing and hydrostatic pressure testing are also discussed here. Major regulatory organizations have recently adopted these findings as the basis for new standards proposed to cover an inline flame arrester test method. 相似文献
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The mechanisms of laminar premixed flame propagation have been intensively studied over the last century. Numerous authors have highlighted intrinsic phenomena in flame propagation such as Darrieus-Landau instability and Rayleigh-Taylor instability. Rayleigh-Taylor instability is often linked to the interaction between the flame front and an acoustic wave. To better characterize the interaction between a flame and aerodynamic conditions, we designed a special vertical closed tube apparatus. Our analysis focused on the behavior of a flame that propagates in a uniform stoichiometric mixture of H2 and O2 diluted with nitrogen. The experimental investigation revealed that acoustic waves emitted as the flame formed near the ignition point could increase the flame front surface by a factor of 10. An acoustic node with an amplitude of 1.3 m was identified and seemed to be responsible for the disappearance of one of the acoustic modes and for a reduction in the average flame surface. This could explain why the flame trajectory had two distinct parts: one corresponding to propagation at a high speed in the lower part of the tube, and the other with a slower speed in the upper part of the tube. The flame surface seemed to depend primarily on the frequencies of vibration and marginally on the nature of the reactive components. Propagation velocities, obtained by multiplying these flame surfaces by the fundamental burning velocity, strongly depended on the mixture reactivity. © 2009 American Institute of Chemical Engineers Process Saf Prog, 2009 相似文献
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化学混凝法有色污水处理工艺研究 总被引:1,自引:0,他引:1
韩风 《石油化工技术经济》2007,23(6):38-41
以原液着色腈纶生产过程中产生的含颜料的污水为研究对象,采用化学混凝法对污水进行处理,研究了不同种类的混凝剂、污水的pH值等因素对混凝效果的影响,提出了有色污水处理的最佳工艺条件,并根据目前原液着色腈纶的生产的现状,提出了有色污水处理的方案。 相似文献
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Thomas C. Piotrowski 《Process Safety Progress》1991,10(2):102-106
The current regulations and accepted recommended practices relating to the use of mechanical flame arresting devices on low pressure, flammable liquid storage tanks will be reviewed. The applicability of these recommendations to typical manifolded tank and closed piping vapor recovery systems, as opposed to the more common “stand alone”, venting to atmosphere storage tanks, will be examined with particular emphasis on the widely varying service conditions that mechanical flame arresting devices may encounter. The limitations placed on the use of commercially available Factory Mutual Approved and Underwriters Laboratories Listed flame arresters will be explained. 相似文献