順丁烯二酸酐在工業(yè)上是在五氧化二釩催化下用空氣氧化苯制得.甲苯、二甲苯或環(huán)烷烴也可作該法的原料.順丁烯二酸酐主要用于與乙二醇縮聚制造不飽和聚酯樹脂,廣泛用于制造烘漆、清漆和油墨等.順丁烯二酸酐是制造反丁烯二酸、丁二酸、酒石酸的原料.
Maleic anhydride is prepared by air oxidation of benzene catalyzed by vanadium pentoxide. Toluene, xylene or cycloalkanes can also be used as raw materials. Maleic anhydride is mainly used to produce unsaturated polyester resin by polycondensation with ethylene glycol, and is widely used in baking paint, varnish and ink. Maleic anhydride is the raw material for the production of fumaric acid, succinic acid and tartaric acid
順丁烯二酸酐與亞硫酸氫鈉加成生成的磺基丁二酸,可用于制造潤濕劑.順丁烯二酸酐還可用于制造農(nóng)藥、醫(yī)藥、染料、石油添加劑和潤滑劑.
The sulfonic succinic acid produced by the addition of maleic anhydride and sodium bisulfite can be used to make wetting agent. Maleic anhydride can also be used in the manufacture of pesticides, pharmaceuticals, dyes, petroleum additives and lubricants
為了減少聚合物的生成量,加人阻聚劑,并采用酸作催化劑進(jìn)行閉環(huán)反應(yīng),采用玲結(jié)晶處理;
In order to reduce the amount of polymer, inhibitor was added and acid was used as catalyst for closed-loop reaction;
按此配方投料,在氮?dú)鈿夥障录訜?50℃,再逐步升溫到220℃.酸值降40mgKOH/g后加入對(duì)苯二酚0.005份,加入苯乙烯使能在反應(yīng)后徹底去除阻聚劑
According to the formula, heat it to 150 ℃ in nitrogen atmosphere, and then gradually raise the temperature to 220 ℃. When the acid value is reduced to 40mg KOH / g, 0.005 phr hydroquinone is added, and styrene is added to remove the polymerization inhibitor completely after the reaction
