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回收顺酐的工艺方法有哪些?

来源:http://www.jnjhhg.cn/ 日期:2021-08-20 发布人: 浏览次数:0
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.
The invention relates to a process for recovering maleic anhydride. In this method, n-butanol is esterified with the gas containing maleic anhydride to produce a monoester, and then the monoester is decomposed into n-butanol and maleic anhydride. The process is characterized by a thermal decomposition reactive distillation column
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。
It takes the monoester and a certain amount of diester generated by esterification reaction as raw materials, carries out reactive distillation in the tower under corresponding working conditions, the n-butanol produced at the top of the tower is recycled to the esterification reaction tower, and the maleic anhydride and diester produced at the bottom of the tower are sent to the fine distillation tower for maleic anhydride refining. It has the characteristics of fast absorption, high absorption yield, no corrosion of equipment, no three wastes, energy saving and 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.
Under the condition of no catalyst at room temperature, n-butanol reacts with the gas containing maleic anhydride to produce monoester (MBM), and then the monoester is heated and reacted to produce n-butanol and maleic anhydride. It is a new process for recovering maleic anhydride. It is composed of esterification reaction absorber 1, n-butanol pretreatment tower 2, condenser 5, cooler 6, fine distillation tower 4 and cooler 8, The utility model is characterized in that a thermal decomposition reactive distillation column 3 and a tower top condenser 7 are arranged
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。
The tower uses the monoester and a certain amount of diester produced at the bottom of the esterification reaction absorption tower as raw materials. Under the working conditions of feed temperature of 50 ℃ - 120 ℃, vacuum degree at the top of the tower of 300-750mmhg and reflux ratio of 1-3, the thermal decomposition reaction distillation is carried out. The pure butanol produced at the top of the tower is sent back to the esterification reaction absorption tower 1 for recycling through condenser 7, Maleic anhydride and diester produced at the bottom of the tower are sent to high-quality distillation tower 4 for maleic anhydride refining.
说到这里,相信大家对顺酐也有了一个大致的了解了吧。了解更多相关内容可以直接关注http://www.jnjhhg.cn如果您还有什么问题,欢迎来电咨询,或者到公司参观考察,期待您的光临!
At this point, I believe you have a general understanding of maleic anhydride. For more information, you can pay direct attention to it http://www.jnjhhg.cn If you have any questions, welcome to inquire or visit the company. We look forward to your presence!

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