磺化氰 的英文怎麼說
中文拼音 [huánghuà]-
Using ethyl cyanoacetate, triethyl orthoformate and methylhydrazine as main raw materials, the herbicide pyrazosulfuron was prepared through the reactions of substitution, amination, cylclization, diazotization and chlorosulfonation
摘要以氰乙酸乙酯、原甲酸三乙酯和甲肼等為主要原料，通過取代、胺化、環化、重氮化和氯磺化等反應制得了除草劑吡嘧磺隆原料藥。Using sodium dicyandiamide and saccharin as raw materials, tribenuron - methyl is synthesized via ring - opening reaction, phosgenation and condensation with total yield of 57. 0 % and product purity of 95. 6 %
以雙氰胺鈉和糖精為起始原料，經過開環、光氣化、縮合等一系列反應制備了苯磺隆，合成反應的總收率可達57 . 0 %以上，純度可達95 . 6 %以上。Abstract : the basic synthesis process parameters of water reducing agent of melamune series was studied. the factors affecting hydroxymethylation, stlfonation, low - ph condensation, and high - ph condensation were thoroughly studied. from that, the good conditions for every stages were determined. by addition of compound additives made of some cheap components, the production cost of melamine water reducing agent was greatly decreased so that the spread and application value was increased
文摘:研究了三聚氰胺系列減水劑的基本合成工藝，考察了各種因素對羥甲基化階段、磺化階段、縮聚階段的影響，確定了各階段的最佳工藝條件，通過加入一些廉價組分製成復合型減水劑，使得三聚氰胺系列減水劑的生產成本大幅度降低，提高了產品的推廣應用價值
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