乙炔

Compressed acetylene access to a clean series of towers, tower 2 clean washed by the oxidation of sodium hypochlorite solution to remove sulfur, phosphorus and other impurities, and then into the tower and 10% to 15% alkali solution and, after purification acetylene by the cooling device of the initial removal of the water saturation after the sperm of more than 98.5 purity acetylene synthesis process used to send VCM.

压缩后的乙炔进入串联的1号清净塔、2号清净塔，经次氯酸钠溶液洗涤氧化除去硫、磷等杂质后，再进人中和塔用10%～15%碱液中和，净化后的乙炔经预冷器初步除去饱和的水分后，纯度98.5%以上的精乙炔送VCM合成工序使用。

The poly with p-aminophenyl-ethynyl as a side-group was synthesized through Pd-catalyzed Sonogashira coupling reaction between 4-[(2,5-dibromophenyl)ethynyl] aniline and 1,4-diethynyl-2,5-bis benzene.

通过单体4-[(2，5-二溴苯)乙炔基]苯胺和1，4-二乙炔基-2，5-二戊氧基苯之间的Sonogashira偶合反应合成了带有p-氨基苯乙炔基共轭侧基的聚对苯撑乙炔。

China mainly natural gas used in the production of nitrogen, followed by the production of methanol, formaldehyde, acetylene, methylene chloride, carbon tetrachloride, carbon disulfide, nitromethane, hydrocyanic acid and extraction of helium and carbon black. Since the 70s, has built more than natural gas and oil field associated gas as raw materials for large-scale ammonia plant, as well as a number of small and medium-sized ammonia plant, so that the national structure of the synthetic ammonia production of raw materials, natural gas share of about 30%; also be built at the same time A system of acetylene gas plant to manufacture Vinylon and vinyl acetate, acetylene gas used in the production of methanol.

中国天然气主要用于生产氮肥，其次是生产甲醇、甲醛、乙炔、二氯甲烷、四氯化碳、二硫化碳、硝基甲烷、氢氰酸和炭黑以及提取氦气。70年代以来，已兴建多座天然气和油田伴生气为原料的大型合成氨厂，以及一批中、小型合成氨厂，使全国合成氨生产原料结构中，天然气所占的比例约达到30％；同时还兴建了天然气制乙炔工厂，以制造维尼纶和醋酸乙烯酯，乙炔尾气用于生产甲醇。

The most common is the oxyacetylene welding, namely the use of acetylene and oxygen produced during combustion of oxyacetylene flame to melt the workpiece and the wire heating, condensation formed after the seam welding method.

最常用的是氧乙炔焊，即利用乙炔和氧混合燃烧时所产生氧乙炔焰，来加热熔化工件与焊丝，冷凝后形成焊缝的焊接的方法。

The relationship of the content of acetylene black to the articulation of the veins in the anti-static terrazzo has been researched in the text; the relationship of the content of acetylene black to the electrical conductivity of anti-static terrazzo is also presented in this paper.

课题研究了在选择乙炔碳黑作为导电填料时，乙炔碳黑加入量与水磨石纹路清晰程度的关系，并着重研究了其加入量与体积电阻率的关系，探讨了不同的乙炔碳黑添加量对水磨石纹抗静电地板导电性能的变化规律。

Four soluble poly(p-phenylene vinylene) derivatives with asymmetric alkoxyl substituents, poly (2-methoxy-5-butoxy)-p-phenylene vinylene, poly [2-methoxy-5-(3'-methyl)butoxy]-p-phenylene vinylene, poly (2-methoxy-5-hexyloxy)-p-phenylene vinylene and poly (2-methoxy-5-octoxy)-p-phenylene vinylene, were prepared by dehydrochlorination reaction with using p-hydroxyanisole and alkyl bromide as raw materials.

以对羟基苯甲醚和溴代烷烃为原料，采用强碱诱导的脱氯化氢缩合聚合法合成了四种可溶性不对称烷氧基取代聚对苯乙炔衍生物，分别为聚（2-甲氧基－5-丁氧基）对苯乙炔、聚［2-甲氧基－5-（3'-甲基）丁氧基］对苯乙炔、聚（2-甲氧基－5-己氧基）对苯乙炔和聚（2-甲氧基－5-辛氧基）对苯乙炔。

This invention products have high sensitivity for ethyne and alcohol etc, wide working range for keeping sensitivity, better selectivity, rapid response and resume function and better stability. It is suited to leakage detection of enthyne and alcohol etc,particularly for on line detection of low concn. ethyne in transformer insulating oil.

本发明对乙炔、乙醇等气体灵敏度高，保持灵敏度的工作范围宽，选择性好，响应、恢复快，稳定性好，适合于一般乙炔、乙醇等气体检漏，特别是适合于变压器绝缘油中低浓度乙炔气体的在线检测。

Have been investigated for the first time, obtaining poly , copolymers of para-diethynylbenzere with propargyl alcohol , propiolic acid with ethynylbenzene , propiolic acid with para-diethynylbenzene, and propiolic acid with propargyl alcohol.

制得丙炔酸均聚物，以及对二乙炔苯与丙炔醇，丙炔酸与苯乙炔，丙炔酸与对二乙炔苯，丙炔酸与丙炔醇共聚物。

Using 1,4-dibromobenzene,1,3,5-tribromobenzene and 2-methyl-3-butyn-2-ol as starting materials and PdCl2,triphenylphosphine,CuI and KOH as catalysts,1-bromo-4-ethynylbenzene,1,4-diethynylbenzene and 1,3,5-triethynylbenzene were synthesized by Sonogashina coupling reaction and elimination reaction.

以对二溴苯、1，3，5-三溴苯和2-甲基-3-丁炔-2-醇为原料，在PdC l2、PPh3和CuI的催化作用下进行Sonogash ina偶联反应，偶联产物在KOH作用下发生消去反应，分别得到对溴苯乙炔、对二乙炔基苯、1，3，5-三乙炔基苯。

Then acetylene black is obtained and collected.

乙炔黑是用电石制成乙炔，把净化后的乙炔气在高温下隔绝空气进行热裂解后，冷却收集制得的高性能炭黑

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。