一種回收順酐的工藝方法。該方法是以正丁醇與含有順酐生成氣進(jìn)行酯化反應(yīng)生成單酯，再將單酯分解成正丁醇和順酐。該工藝的特征在于設(shè)置一個(gè)熱分解反應(yīng)精餾塔，它以酯化反應(yīng)生成的單酯和一定含量的二酯為原料，在相應(yīng)的工況下在塔內(nèi)進(jìn)行反應(yīng)蒸餾，塔頂產(chǎn)出正丁醇回酯化反應(yīng)塔循環(huán)使用，塔底產(chǎn)出順酐和二酯去精品精餾塔進(jìn)行順酐精制。具有吸收快、吸收收率高、不腐蝕設(shè)備、無(wú)三廢、、操作可靠特點(diǎn)。
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.
正丁醇在室溫?zé)o催化劑條件下，與含有順酐反應(yīng)生成氣反應(yīng)生成單酯（ＭＢＭ），再將單酯加熱反應(yīng)，生成正丁醇和順酐的工藝路線回收順酐的新工藝，它由酯化反應(yīng)吸收塔１，正丁醇予處理塔２和冷凝器５，冷卻器６，及精品精餾塔４和冷卻器８所構(gòu)成，其特征在于，設(shè)置一個(gè)熱分解反應(yīng)精餾塔３及塔頂冷凝器７，該塔以酯化反應(yīng)吸收塔塔底產(chǎn)出的單酯和一定量的二酯為原料，在進(jìn)料溫度為５０℃－１２０℃，塔頂真空度為３００－７５０ｍｍＨｇ，回流比為１－３的工況下實(shí)行熱分解反應(yīng)精餾，塔頂產(chǎn)出純正丁醇經(jīng)冷凝器７送回酯化反應(yīng)吸收塔１循環(huán)使用，塔底產(chǎn)出順酐與二酯送精品精餾塔４進(jìn)行順酐精制。
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.
濟(jì)南金昊化工有限公司主要從事化工產(chǎn)品經(jīng)營(yíng)，主要產(chǎn)品有：順酐、氫氧化鉀、粉末氫氧化鉀、食品級(jí)氫氧化鉀、食品級(jí)氫氧化鈉、食品級(jí)碳酸鈉、工業(yè)級(jí)碳酸鉀、食品級(jí)碳酸鉀、過(guò)硫酸鈉、過(guò)硫酸銨、甲酸鉀、二氯甲烷、硼砂、硼酸、糖蜜、EDTA、硬脂酸等。順酐伸展工貿(mào)，歡迎新老客戶前來(lái)選購(gòu)，公司本著誠(chéng)信務(wù)實(shí)的理念，以您的需求就是我們的責(zé)任，您提供、、獨(dú)到的服務(wù)。
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.
