丙烯腈-丁二烯-苯乙烯

Although modern commercial acrylonitrile process appear similar and produce very pure product ,each is characterized by its own original features

虽然现代化的商业丙烯腈工艺似乎是类似的，而且生产出很纯的产品，但每一种都有它们自己的固有特点

Since about 1960,the leading route to acrylonitrile has been by catalytic reaction of propylene with ammonia and air.

大约从1960年起，获得丙烯腈的主要技术路线一直是利用丙烯与氨水和空气的催化反应。

The catalyst is presently produced by in facilities near the acrylonitrile plant.

该催化剂目前由靠近丙烯腈工厂的设备中生产。

Existing defects of present quenching tower and process in China's acrylonitrile production plants were analyzed.

针对国内现有丙烯腈生产装置急冷工艺所存在的缺陷，经热模试验、冷模试验分析研究和工业试验修改验证，开发了一种新的急冷工艺。

Additionally, acrylonitrile reactor is used as modeling object. The proposed network shows the better performance.

以丙烯腈反应器作为建模研究对象，该网络显示出较强的泛化能力。

Objective: A method for determination of residual acrylonitrile monomer in food packaging by headspace capillary gas chromatography has been developed.

目的：建立了自动顶空毛细管气相色谱法测定食品包装材料中残留丙烯腈单体含量的分析方法。

The catalyst of the present invention is especially suitable for use in the conditions of low reaction temperature, high reaction pressure and high propylene load, may result in high yield of acrylonitrile, and may be used in industrial production.

本发明催化剂特别适用于在较低反应温度、较高的反应压力和高丙烯负荷条件下使用，且可保持高的丙烯腈单收，可用于工业生产中。

It was confirmed by ATRFTIR analysis that acrylonitrile was grafted onto the polymer surface.

并利用ATRFTIR分析证明了丙烯腈单体接枝到聚合物薄膜样品表面。

The reaction produces about 20 MJ/Kg acrylonitrile.

此反应产生大约20兆焦耳/公斤的丙烯腈。

Finally, Based on the whole research work, a new technology, named"ultimate recycle operation"was proposed. The main purpose of this technology is to obtain the maximum selectivity of acrylonitrile and it is of great importance on conservation of resources and environment protection.

最后，在全文研究工作的基础之上，本文提出一种"极限式循环操作"反应技术的设想，利用该反应技术能够最大限度地提高丙烯腈的选择性，降低深度氧化产物的生成，在节省资源和环境保护等方面均具有突出的应用意义。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。