抽余C_4烃中异丁烯催化逆流水合制叔丁醇

采用大颗粒离子交换树脂催化剂,在φ100mm×10m的反应器中进行了异丁烯催化逆流水合制叔丁醇的中间试验。考察了反应温度、水油体积比和抽余C4烃的流速等对异丁烯转化率的影响。试验结果表明,异丁烯催化逆流水合制叔丁醇的适宜操作条件为:反应温度80~90℃,水油体积比为4~5,抽余C4烃的流速为0.45~0.55mm/s。在此条件下,异丁烯的转化率可达88.8%。工业装置运转结果表明,异丁烯转化率大于75%。     

拟活性阳离子聚合——异丁烯与苯乙烯嵌段共聚物的合成与表征

以丙烯酸正丁酯-四氯化钛-二甲基亚砜为引发体系,于二氯甲烷中、-45℃下进行异丁烯与苯乙烯的拟活性阳离子嵌段共聚反应。结果表明,选择适当的反应条件,可得到两单体的共聚效率为50％,共聚物中平均苯乙烯结合量为31.7％(质量),分子量为3万,分子量分散指数约为1.8的嵌段共聚物。     

CIP-1型裂解催化剂的研究

CIP-1裂解催化剂是一种多组元分子筛催化剂, 适用于催化裂解Ⅱ型工艺（DCC-Ⅱ）。该催化剂具有在生产高辛烷值汽油的同时多产丙烯及低碳异构烯烃的特点工业应用表明, 在反应温度505℃ 下汽油、丙烯、异丁烯和异戊烯的产率分别为40.98、12.52、4.57和5.78wt%, 在反应温度530℃下分别为38.45、14.43、4.75和5.93wt%.     

聚合型受阻酚抗氧剂的合成及应用

研究了以对甲酚为主要原料合成聚合型受阻酚抗氧剂的工艺。结果表明，树脂缩合反应条件是对甲酚与双环戊二烯为3：1～1．25，ZnCl2催化剂为对甲酚质量分数的2．0％，反应温度为75～80℃，双环戊二烯滴加时间为2h。烷基化反应温度为70～75℃，H2S04催化剂为缩合树脂质量分数的2．0％。制得的聚合型受阻酚抗氧剂产品对聚氨酯泡沫用聚醚2802具有较好的抗氧化性，起燃温度达224℃。     

重质原料油生产轻烯烃的Ⅱ型催化裂解工艺和催化剂

Ⅱ型催化裂解是以重质油为原料生产丙烯、异丁烯和异戊烯等轻烯烃, 并同时兼产高辛烷值优质汽油的新催化工艺。该工艺使用新研制的新型择形催化剂, 可以加工减压馏分油、减压馏分油掺渣油或二次加工油以及全常压渣油, 并成功地进行了工业化试验。以临胜减压馏分油掺左右脱沥青油为原料, 可以得到12.52wt%~14.43wt%的丙烯和11.23wt%~11.41wt%的丁烯,同时还得到40wt%左右93号优质汽油。型催化裂解工艺开创了一条以重质油为原料生产轻烯烃和高辛烷值优质汽油的新途径     

Synthesis and properties of bromide‐ functionalized poly(isobutylene‐co‐p‐ methylstyrene) random copolymer

Poly(isobutylene‐co‐p‐methylstyrene) (IB/p‐MS) random copolymer is a new generation of polyisobutylene‐based elastomers. The cationic copolymerization of IB with p‐MS was thoroughly examined by using 2‐chloro‐2,4,4‐trimethylpentane/ethylaluminiumsesquichloride/electron donor as initiating system. IB/p‐MS random copolymers with high molecular weight were obtained at elevated temperature through the addition of ethyl acetate; the reaction proceeded in a mildly exothermic manner. Although the reactivity ratios of comonomer pairs differ by close to an order of magnitude, p‐MS was uniformly distributed in the chains. IB/p‐MS random copolymer can be brominated by adding molecular bromine into the copolymer solution, thereby yielding a completely saturated polymer backbone with a chemically reactive site. The types and selection of appropriate vulcanization systems for bromide‐functionalized IB/p‐MS random copolymers are also discussed. © 2016 Society of Chemical Industry     

BIMSM纳米复合材料在药用丁基橡胶塞中的应用

本文主要研究了溴化异丁烯-对甲基苯乙烯共聚物（BIMSM）/高岭土纳米复合材料的性能以及其在药用丁基橡胶塞中的应用。实验结果表明,BIMSM纳米复合材料具有优异的气密性和耐老化性能;用BIMSM纳米复合材料生产的药用丁基橡胶塞的穿刺落屑性能、气密性均有显著的改善。     

Effects of nitrogen plasma treatment of pressure-sensitive adhesive layer surfaces on their peel adhesion behavior

The influence of the surface modification of pressure-sensitive adhesive tapes on their adhesion behavior has been investigated. PBA [poly(butyl acrylate)] and PIB [poly(isobutylene)] adhesives were chosen as pressure-sensitive adhesives and nitrogen plasma was used for the surface modification of the adhesives. The peel force of PBA or PIB adhesive/stainless steel joints was evaluated. The nitrogen plasma treatment showed large effects on the adhesion behavior of both the PBA and the PIB adhesives. The peel force for the PBA adhesive/stainless steel joint decreased by 57 times as a result of the nitrogen plasma treatment and that for the PIB adhesive/stainless steel joint increased by 2.2 times. There are essential differences in the modification reactions caused by the nitrogen plasma between the PBA and PIB adhesives. For the PBA adhesive, cross-linking reactions occurred among the PBA polymer chains and the surface was hardened. For the PIB adhesive, degradation reactions occurred and products with a low molecular weight were formed on the surface. These differences are due to the different responses of the PBA and PIB adhesives towards the nitrogen plasma. The mechanism of the changes in adhesion behavior caused by the nitrogen plasma is discussed.     

Selective Oxidation of Isobutane to Methacrolein over Mo–V–Te–Sb Mixed Oxide Catalysts with Different Antimony Contents

A series of MoV_0.3Te_0.23Sb_x (x=0–0.6) mixed oxides were prepared and investigated for the selective oxidation of isobutane. Among them, MoV_0.3Te_0.23Sb_0.5 showed the best methacrolein selectivity (as high as 39%), and the yield to methacrolein reached 7.8% at 20.0% isobutane conversion at 470 °C.