一种回收顺酐的工艺方法。该方法是以正丁醇与含有顺酐生成气进行酯化反应生成单酯，再将单酯分解成正丁醇和顺酐。该工艺的特征在于设置一个热分解反应精馏塔，它以酯化反应生成的单酯和一定含量的二酯为原料，在相应的工况下在塔内进行反应蒸馏，塔顶产出正丁醇回酯化反应塔循环使用，塔底产出顺酐和二酯去精品精馏塔进行顺酐精制。具有吸收快、吸收收率高、不腐蚀设备、无三废、、操作可靠特点。
A process for recovery of maleic anhydride. In this method, a monoester was synthesized by esterification of n-butanol with a gas containing maleic anhydride, and the monoester was decomposed into n-butanol and maleic anhydride. Features of this process is to set up a pyrolysis reaction rectification tower, it by esterification of monoester and certain content of two ester as raw materials, in the corresponding working conditions in the reaction distillation tower, tower output back to the normal butyl alcohol esterification reaction tower circulation use, bottom output second ester and maleic anhydride to fine rectifying column for maleic anhydride refining. With fast absorption, high absorption rate, no corrosion equipment, no waste, energy saving, reliable operation.
正丁醇在室温无催化剂条件下，与含有顺酐反应生成气反应生成单酯（ＭＢＭ），再将单酯加热反应，生成正丁醇和顺酐的工艺路线回收顺酐的新工艺，它由酯化反应吸收塔１，正丁醇予处理塔２和冷凝器５，冷却器６，及精品精馏塔４和冷却器８所构成，其特征在于，设置一个热分解反应精馏塔３及塔顶冷凝器７，该塔以酯化反应吸收塔塔底产出的单酯和一定量的二酯为原料，在进料温度为５０℃－１２０℃，塔顶真空度为３００－７５０ｍｍＨｇ，回流比为１－３的工况下实行热分解反应精馏，塔顶产出纯正丁醇经冷凝器７送回酯化反应吸收塔１循环使用，塔底产出顺酐与二酯送精品精馏塔４进行顺酐精制。
N-butyl alcohol under the condition of room temperature without catalyst, and containing maleic anhydride reaction generated gas generated monoester (MBM), then monoester heating reaction, the recycling process routes of the formation of n-butyl alcohol and anhydride maleic anhydride, new technology, it is absorbed by the esterification reaction tower 1, n-butyl alcohol to deal with 2 and 5 condenser, cooler, and the fine rectifying column 4 and 8 cooler, its characteristics is to set up a pyrolysis reaction rectification column 3 and 7 overhead condenser, the tower to esterification reaction absorption tower bottom single ester and the output of a certain amount of two ester as raw materials, the feed temperature is 50 ℃ to 120 ℃, At the top of the tower, the vacuum degree is 300-750mmhg, and the reflux ratio is 1-3, the thermal decomposition reaction rectification is carried out. The pure butanol produced at the top of the tower is sent back to the esterification absorption tower 1 by the condenser 7 for circular use. At the bottom of the tower, the maleic anhydride and diester are delivered to the fine distillation tower 4 for maleic anhydride refining.
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Jinan Jin Hao chemical co., LTD., mainly engaged in chemical products business, main products are: maleic anhydride, potassium hydroxide, potassium hydroxide, potassium hydroxide powder, food grade, food grade sodium hydroxide, food grade, industrial grade potassium carbonate, sodium carbonate food grade potassium carbonate, sodium persulfate, ammonium persulfate, potassium formate, methylene chloride, borax, boric acid, molasses, EDTA, stearic acid, etc. Maleic anhydride extension industry and trade quality, welcome new and old customers to come to choose and buy, the company in good faith and pragmatic concept, to your needs is our responsibility, you provide comprehensive, quality, unique service.
