三聚氯氰含氰尾气治理工艺研究

为解决三聚氯氰生产过程中尾气含氰污染物问题,提出采用甲烷燃烧、氨催化、水吸收3步处理技术。分析结果表明,三聚氯氰结晶尾气中的氯化氰和氯气首先与甲烷发生氧化还原反应生成CO_2、NO_x、H_2O、HCl,再进一步与氨气混合后经脱盐、氨催化反应生成CO_2、N_2,尾气中微量活性炭经水吸收去除,最终实现了三聚氯氰尾气的无害化排放。     

应用塑料尾气烟囱效果显著

三聚氯氰生产排放出的尾气中,含有氯气、氯化氢和单体氯氰等强腐蚀性气体。生产一吨三聚氯氰,尾气中排放出的氯气约6公斤/小时,氯化氢和氯氰约7.46公斤/小时。由于尾气中含有这些腐蚀性气体,因此排放烟囱的防腐蚀就成为生产中的一个重要问题。过去,我厂曾采用碳钢筒壁内、外涂几道环氧树脂,涂防腐漆,以及衬环氧玻璃布等方法防腐。从1973年以来,尾气烟囱平均两年就得更     

三聚氯氰的生产应用及市场

介绍了三聚氯氰的性质、生产方法和应用 ,分析了国内外三聚氯氰的生产和消费情况 ,提出了发展我国三聚氯氰生产的一些建议。     

三聚氯氰的生产应用及市场前景

介绍了三聚氯氰的生产方法和用途，分析了国内外三聚氯氰的生产消费现状及发展前景，提出了发展我国三聚氯氰生产的一些建议。     

三聚氯氰的生产应用及市场分析

介绍了三聚氯氰的性质，生产方法和应用情况，分析了国内外三聚氯氰的生产和消费情况，提出了发展我国三聚氯氰生产的一些建议。     

三聚氯氰的生产应用及市场

介绍了三聚氯氰的性质、生产方法和应用，分析了国内外三聚氯氰的生产和消费情况，提出了发展我国三聚氯氰生产的一些建议。     

三聚氯氰的生产应用及市场分析

介绍了三聚氯氰的生产方法和用途，分析了国内外：三聚氯氰的生产和消费情况，提出了发展我国三聚氯氰生产的一些建议。     

三聚氯氰的生产应用及市场分析

介绍了三聚氯氰的性质，生产方法和压用情况，分析了国内外三聚氯氰的生产和消费情况，提出了发展我国三聚氯氰生产的一些建议。     

三聚氯氰的生产应用及市场分析

介绍了三聚氯氰的性质，生产方法和应用情况，分析了我国三聚氯氰的生产和消费情况，提出了发展我国三聚氯氰生产的一些建议。     

三聚氯氰的生产应用及市场分析

介绍了三聚氯氰的性质、生产方法和应用情况，分析了国内外三聚氯氰的生产和消费情况，提出了发展我国三聚氯氰生产的一些建议。     

Reaction of cyanuric chloride and its derivatives with polyamide fibres in non-aqueous medium

Polyamide fibres (Nylon 6) were treated with cyanuric chloride in organic solvents (tetrachloroethylene and xylene) under different conditions. This treatment caused an increase in the fibre nitrogen content. The magnitude of the latter was dependent upon the cyanuric chloride concentration, the time and temperature of the treatment as well as the nature of solvent. For instance an extra nitrogen content of 0.08% was obtained at a cyanuric chloride concentration (based on wt. of fabric) of 25%. This contrasts with 0.46% at 100% concentration of cyanuric chloride. Similarly and extra nitrogen content of 0.08% was achieved at 50°C while at 121°C it amounted to 1.18%. However, the cyanuric chloride treated nuylon failed to link covalently to dyestuffs containing labile hydrogen, indicating no chemical reaction between polyamide 6 and cyanuric chloride. This chemical reaction could only be achieved by use of 2-anilino-4,6-dichloro-1,3,5-triazine instead of cyanuric chloride. Similarly a disperse dye containing a chlorotriazine ring as the reactive group was found to react chemically with polyamide 6.     

三嗪系成炭剂的研究进展

三嗪系成炭剂依据分子构型可分为小分子、线形大分子和超支化大分子,分别介绍了其合成原料、合成工艺和阻燃效果,重点对采用三聚氯氰、三聚氰胺、异氰尿酸及其衍生物等原料制备的成炭剂进行了评述,分析了不同品种成炭剂的优缺点,并对三嗪系阻燃剂的发展方向进行了展望。     

国内外三聚氯氰的市场现状

世界三聚氯氰的生产企业主要有Degussa ,Syngenta和中国营口三征有机化学有限公司 ,2 0 0 2年世界三聚氯氰的生产能力为 2 2 33万t/a ,产量 11 4 16万t。截至 2 0 0 4年 5月 ,我国有三聚氯氰生产厂家 14家 ,实际开工 10家。 2 0 0 3年我国三聚氯氰的生产能力为 9 6 3万t/a ,产量 4 86 2万t,开工率 5 0 5 %。在我国 ,三聚氯氰的消费构成是三嗪类农药占 4 5 % ,染料占 30 % ,化学助剂占 18% ,医药占 2 % ,其他占 5 %。作者提出的发展建议是开发下游产品 ,促进产业发展 ;调整产业结构 ,实行大战略 ;增加出口量 ,占领国际市场。     

生产三聚氰酸的新方法

介绍了以尿素为原料，利用燃烧气加热、三聚氰酸粉作为加热介质生产三聚氰酸的新方法。该法具有产品收率高、质量好、能耗低等优点。     

值得开发的几种精细化工类氯产品

介绍了２,６－二氯甲苯、苄基氯、氯乙醇、二氯乙酰氯、氯灭酸、三聚氯氰、氯化亚砚、３,５二氯苯胺、氯乙酸甲酯及氯代异氰尿酸等近１０种精细化工氯产品的生产方法与用途,并对部分产品的市场前景进行了展望,指出它们是值得开发的产品。     

三聚氯氰的生产及应用

介绍了三聚氯氰的生产及应用现状,并对其发展前景进行了探讨。     

Surface modification of macroporous poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) resins for improved Candida antarctica lipase B immobilization

Crosslinked macroporous hydrophilic poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) [abbreviated poly(GMA-co-EGDMA)] with identical chemical structure (60% of glycidyl methacrylate) but with varied average pore sizes (from 30 to 560 nm), specific surface areas (from 13.2 to 106.0 m²/g), specific volumes (from 0.755 to 1.191 cm³/g) and particle sizes (<100 μm–630 μm) were synthesized via suspension polymerization. Modifications of poly(GMA-co-EGDMA) with various diamines (1,2-diaminoethane, 1,4-diaminobutane, 1,6-diaminohexane and 1,8-diaminooctane), 2-fluoroethylamine, glutaraldehyde and cyanuric chloride were carried out. The influence of the interaction between Candida antarctica lipase B (Cal-B) and various carriers during immobilization on the loading and hydrolytic activity (hydrolysis of para-nitrophenyl acetate) of the immobilized Cal-B were studied. Immobilization of Cal-B was performed at different temperatures and pH values. Cal-B immobilized at 30 °C and pH 6.8 was leading to increased activities. Purely physical adsorption between enzyme and copolymer was observed on carriers in which amine or fluorine groups were introduced into the carrier structure by modification with various diamines or 2-fluoroethylamine. As a consequence enzyme loading and activity decreases. In contrary, modification of the poly(GMA-co-EGDMA) with glutaraldehyde and cyanuric chloride results in a covalent connection between enzyme and carrier. The obtained results show a significant increase in Cal-B activity. The influence of the amount of glutaraldehyde and cyanuric chloride used for modification was screened. Increasing the amount of glutaraldehyde or cyanuric chloride used for modification resulted in an increase of the enzyme loading. Consequently, higher amount of glutaraldehyde used led to a higher fraction of the enzyme molecules that are covalently connected on to the carrier. As the amount of glutaraldehyde or cyanuric chloride used for modifications increases, activity of immobilized C. antarctica lipase B primarily increases, showing the highest value for 0.66% and 0.050% w/w, respectively, and subsequently decreases. We could show that Cal-B immobilized on epoxy-containing copolymer modified with glutaraldehyde and cyanuric chloride performs higher activity than free enzyme powder.     

高品质1,3,5-三烯丙基-均三嗪-2,4,6-三酮的合成与测试表征

三烯丙基异氰脲酸酯(TAIC)是一种用途广泛的精细化工产品。笔者以氰尿酸和氯丙烯为起始原料,主要研究了TAIC的合成、提纯和测试表征。TAIC的合成采用二步法,粗产物通过分步提纯后,气相色谱(GC)测试纯度>99.5%。结合对产物、样品TAIC和样品三聚氰酸三烯丙酯(TAC)的熔点、气相色谱(GC)、核磁(13C NMR)和红外(FT-IR)测试分析比较,以及有机化合物图库(SDBS)数据比较,其结果显示合成产物即TAIC。     

三聚氯氰在荧光增白剂工业中的应用与展望

本文系统地介绍了用三聚氯氰合成的荧光增白剂,按其母体化学结构类型可分为:双三嗪氨基二苯乙烯类型、含三嗪基的香豆素类型、三嗪基芘类型、4-酰胺基-4‘-三嗪氨基二苯乙烯类型.详细列出了这四类荧光增白剂主要品种的化学结构式、商品名称、CAS登录号、C.I.索引号.简述了典型合成工艺和它们的主要用途.还介绍了目前双三嗪氨基二苯乙烯类型荧光增白剂的研究进展,并在相关产业链的持续拉动下,随着荧光增白剂产品不断打入国际市场,预测了今后十年内三聚氯氰在荧光增白剂中的消耗量仍将逐年递增,年均递增速率约为6%左右.     

三嗪氨基二苯乙烯型荧光增白剂改性及其应用前景

介绍了三嗪基氨基二苯乙烯型荧光增白剂的结构、性质、增白机理及影响其增白效果的因素,重点讨论了其合成、共聚改性以及缩聚改性.按照亲核性由弱到强次序,原料依次与三聚氯氰反应,通过高分子改性,可使其荧光反式活性分子固定在大分子链上,显著提高其增白性能、光化学稳定性和荧光量子产率,同时降低其光致异构现象.指出今后应重点开发高效环保液态型及耐强酸强碱的荧光增白剂,并认为缩聚改性、膜分离技术、复配增效以及开发合适的显白剂将是研究热点.