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基本信息：中文名称 （1,1,3-三氧代-1,3-二氢-1lambda6-苯并[d]异噻唑-2-基）-乙腈英文名称 2-(1,1,3-trioxo-1,2-benzothiazol-2-yl)acetonitrile英文别名 3-oxo-1,2-benzoisothiazoline-2-acetonitrile 1,1-dioxide;saccharin-2-acetonitrile;CAS号 52188-12-2上游原料CAS号 中文名称107-14-2 氯乙腈81-07-2 糖精590-17-0 溴乙腈128-44-9 糖精钠更多上下游产品参见：pose CaHPO4. Through the analyzing of the relation between sulfate used and decomposition time, we find for all the reaction, the reaction rate is fast at the beginning, but slow down following the reaction time, no matter how large the ratio of SO42- and Ca2+. So it shows that a "transparent solid-state membrane" occurs and the passivation of plain fertilizer is mainly caused by the overdose of H2SO4. The amount of used SO42- takes big effect on the passivation. When the amount of H2SO4 acid is excess for 30%, the reaction will be stopped uncompleted, that indicates that there is a limitation of overdose SO42- the same as for wet H3PO4 acid process. The key point to gain more phosphorus is to overcome the passivation of plain fertilizer. For the reaction of plain fertilizer and KHSO4, in the beginning of the reaction, transforms quickly, from 1 to 1.5 hour it could be transformed to 80%, after this period, in the end of the reaction, the speed of reaction will decrease, but still continues. The decomposition rate mainly depends on the time of reaction and the amount of used H2SO4.The result of the research indicates increasing the time and the temperature of the reaction can raise the decomposition rate. In the beginning of the reaction, the decomposing speed under 50℃ is faster than under 70℃， under 60℃ thedecomposing speed is the fastest. But in the end of the reaction, during the range of 50-70℃，the decomposition rate will increase as the increasing of temperature and speed of the reaction.Through the research the reaction of two kinds of particle sizes under different temperature, we consider the reaction speed of small particle plain fertilizer is faster than the big ones.The liquid-solid multiple-decomposition reaction of plain fertilizer and KHSO4 is a diffusion controlled reaction and its kinetic model can be written as follows:In this model, we do not consider the CaHPO4 particles spherical theoretically and believe that there are fine holes between their surface and interior. When fitting the - 2.2 power of the time into the equation, it is find that as the time goes on, the reaction is more and more difficult to complete, the reason is the resistance of the diffusion increases with the time.The process study of producing KH。
7.乙腈物理化学性质及其工业生产方法及步骤多少说点吧,急
中文名称： 乙腈（jīng）；甲基氰；氰甲烷 英文名称： acetonitrile ;methyl cyanide;cyanomethane CAS No。
: 75-05-8 分子式： C2H3N ;CH3CN 分子量： 41。 05 主要成分： 纯品 气味与性状：本品为无色透明液体；微有醚样臭气 熔点（℃）： -45。
7 沸点（℃）： 81。1 相对密度（水=1）: 0。
79 相对蒸气密度（空气=1）: 1。42 饱和蒸气压（kPa）: 13。
33(27℃) 燃烧热（kJ/mol）: 1264。0 临界温度（℃）： 274。
7 临界压力（MPa）: 4。83 辛醇/水分配系数的对数值： -0。
34 闪点（℃）： 2 引燃温度（℃）： 524 爆炸上限%（V/V）: 16。 0 爆炸下限%（V/V）: 3。
0 溶解性： 与水混溶，溶于醇等多数有机溶剂。 燃爆危险： 本品易燃。
危险特性： 易燃，其蒸气与空气可形成爆炸性混合物，遇明火、高热或与氧化剂接触，有引起燃烧爆炸的危险。与氧化剂能发生强烈反应。
燃烧时有发光火焰。与硫酸、发烟硫酸、氯磺酸、过氯酸盐等反应剧烈 腈的生产方法很多，其中工业生产的主要有醋酸氨化法；乙炔氨化法和丙烯氨氧化副产法等。
1。醋酸氨化法以醋酸；氨为原料，在三氧化二铝催化剂作用下，在360-420℃温度下，进行反应，一步合成乙腈，反应液经吸水和精馏即得成品。
原料消耗定额：乙酸（98%）1763kg/t；液氨（99。5%）691kg/t。
2。乙炔氨化法以乙炔；氨为原料，以三氧化二铝催化剂， 在500-600℃温度下，一步反应合成乙腈。
原料消耗定额：乙炔10231m3；液氨（99。4%）1007kg/t。
3。丙烯氨氧化副产法以丙烯；氨和空气为原料，通过催化剂合成丙烯腈时，同时副产乙腈。
每吨丙烯腈可副产25-100kg乙腈。 4。
由乙酰胺与五氧化二磷脱水而得。 5。
由硫酸二甲酯与氰化钠作用而得。 。
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