环己酮肟液相重排反应机理及动力学研究

研究了环己酮肟重排反应生成己内酰胺的机理及反应动力学方程。在建立用分光光度法测定环己酮肟浓度方法的基础上,实验研究了反应温度为20~45℃范围内的液相重排反应动力学。提出了此反应的化学反应动力学速率方程式: -r肟= k0exp (-E/RT)Ca肟Cb硫酸,其中环己酮肟反应级数a为2,硫酸反应级数b为1,活化能为-E/R = -19.86 kJmol-1, 频率因子k0为1.35×1027。通过实验研究证实了作为催化剂的硫酸参与重排反应的机理,认为重排反应过程中游离SO3不参与反应,仅作为水的吸收剂,此结论对环己酮肟液相重排反应的生产技术改造提供了有力依据,并在生产中得到了应用。     

Synthesis and Crystal Structure of RE[CH_2(CH_2)_4CONC_4H_9]_3(NO_3)_3(RE=Dy,La)

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆＲＥ［ＣＨ２（ＣＨ２）４ＣＯＮＣ４Ｈ９］３（ＮＯ３）３（ＲＥ＝Ｄｙ，Ｌａ）ＷａｎｇＨａｎｚｈａｎｇ（王汉章），ＸｕＱｉｎｇｆｅｎｇ（徐庆锋），ＱｉａｎＰｕ（钱朴）ＳｕｎＪｉａｎｐｉｎｇ（孙建...     

铸型尼龙改性的研究进展

铸型尼龙产品广泛地用于各种机械零件，改性后的铸型尼龙，可克服其自身的缺点，满足工业应用的要求。文章就我国近年来在铸型尼龙改性研究方面的情况及不同的改性方法做了详细的介绍。     

B2O3/TiO2-ZrO2催化剂上环己酮肟的气相Beckmann重排反应

用共沉淀法制备了TiO2-ZrO2复合氧化物载体，BET，DTA，XRD表征结果表明，该复合载体具有较大的比表面和较好的热稳定性，对于环己酮肟气相Beckmann重排反应制己内酰胺，用复合载体制备的B2O3／TiO2-ZrO2催化剂，比分别以TiO2,ZrO2为载体所制备的B2O3/TiO2和B2O3／ZrO2催化剂具有更高的活性和选择性，实验表明，催化剂表面中等强度的酸位是环己酮肟气相Beckmann重排反应的有效活性中心。     

中空纤维更新液膜在己内酰胺精制中的应用

研究了中空纤维更新液膜技术用于己内酰胺精制时的传质性能,考察了两相流速、萃取剂用量对传质的影响,并与大块液膜技术以及萃取塔技术进行了对比。在实验范围内,中空纤维更新液膜过程总传质系数随两相流速的增大而增大,且壳程流速对传质的影响较大。中空纤维更新液膜过程传质通量可达大块液膜的1．5倍,总体积传质系数可达工业萃取塔的2．3倍,萃取剂用量相比于大块液膜、工业萃取塔大幅度降低,具有很大的应用潜力。     

Study on the polymerization of ϵ‐caprolactam in the interlamellar spaces of [TEACOOH]–montmorillonite intercalations complex and its characterization

The polymerization of ?‐caprolactam between the interlamellar spaces of the [TEACOOH]–montmorillonite intercalations complex was attempted using Na–montmorillonite and 10‐carboxy‐n‐decyltriethylammonium bromide to achieve [TEACOOH]–polycaprolactam–montmorillonite, in which montmorillonite (inorganic polymer) is chemically bonded with the polycaprolactam (organic polymer). The results of X‐ray and IR analysis for the samples obtained after polymerization showed that the polymerization reaction has been successfully accomplished. For the purpose of studying the polymeric reaction product more precisely, we have isolated the polymerized product from the silicate layers and analyzed it with X‐ray diffractometer and IR spectrometer. Comparison of the results of X‐ray and IR analysis between the isolated polymer and the polymer that was synthesized by the reaction of ?‐caprolactam only with the organic cation without montmorillonite showed that both obtained polymers are the same compounds. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 1904–1910, 2003     

利用A/O技术处理己内酰胺生产废水的研究

探讨采用先进的A/O(厌氧菌 /好氧菌 )生物脱氮技术对己内酰胺生产废水进行处理的工作机理和工艺设计方法 ,分析了温度、溶解氧、pH值、进水碳氮比等参数对生物脱氮工艺过程的影响 ,并对其关键技术进行了研究     

甲醇钠催化制取MC尼龙

研究了甲醇钠替代传统催化剂氢氧化钠催化合成MC尼龙的工艺方法，改进了催化剂的投加方式，用甲醇钠溶液取代氢氧化钠颗粒催化合成MC尼龙，有助于催化剂的准确计量，结果表明，使用甲醇钠催化剂合成MC尼龙，工艺简单，合成周期短，制品产生气孔的几率低，产品颜色浅，力学性能不变，并且避免了因反应条件波动引起的不聚合现象。     

己内酰胺市场分析及技术发展概况

概述了己内酰胺行业的生产技术及市场消费情况;对影响己内酰胺产品价格的主要因素进行了分析;对降低己内酰的成本工艺路线进行了探讨。     

Kinetics of and catalyst decay accompanying the gas phase rearrangement of cyclohexanone-oxime over a hy ultrastable zeolite

The kinetics of the rearrangement of cyclohexanone-oxime has been studied in a fixed bed, glass tubular reactor at atmospheric pressure and temperatures of 240, 270, 300 and 335°C, using ultrastable HY zeolite catalyst. Several kinetic models, including the Langmuir-Hinshelwood type, have been derived and the best statistical fit has been obtained with a pseudo-first order kinetic equation. The rate constants and activation energies for the formation of the products caprolactam, cyclohexanone and 5-cyanopent-l-ene have been calculated. Based on the evolution of the selectivity with temperature, and the I.R. spectra of the poisoned catalyst, different decay models have been deduced and discussed.