Method for recycling alcohol from butyl acrylate wastewater
A technology of butyl acrylate and recovery method, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as easy blockage of devices, unable to drive normally, poor recovery effect, etc., to prevent parking or damage device, convenient and efficient recycling, the effect of reducing structure and cost
Inactive Publication Date: 2013-08-14
谦信化工集团有限公司
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Problems solved by technology
Since the water generated in the production process of butyl acrylate and the wastewater generated in the subsequent neutralization process will take away part of butanol, the boiling point of butanol under normal pressure is 117.8 ° C, which is higher than that of water. Alcohol and water are separated. The traditional method is to directly recover the butanol taken away by the above two kinds of process wastewater through atmospheric pressure. However, since the wastewater after the neutralization process contains more solid impurity salts, it is easy to block the device, resulting in failure to operate normally. Affect normal production and cause device damage in severe cases
[0003] At present, the butanol in the butyl acrylate process wastewater is directly distilled and recovered by the traditional atmospheric distillation method, but the recovery effect is poor, the energy consumption is high, and the equipment requirements are high.
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Embodiment 1
[0020] Embodiment 1 of the present invention describes the present invention in further detail below in conjunction with the embodiments.
[0021] Such as figure 1 Shown, a kind of recovery method of alcohol in butyl acrylate waste water, this method may further comprise the steps:
[0022] (1) Vacuum distillation: The clear water generated by the esterification reaction is firstly preheated from the clear water buffer tank through the clear water recovery alcohol tower feed pump into the clear water recovery tower feed preheater, after preheating, it is fed into the clear water recovery alcohol tower, and then From the clean water recovery alcohol tower into the clean water recovery alcohol tower reboiler heating, after heating, return to the clean water recovery alcohol tower, the pressure of the clean water recovery alcohol tower is 80-90kPaA, a small amount of water and alcohol form alcohol-water azeotrope from clean water recovery alcohol The top of the tower enters the ...
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Abstract
The invention discloses a method for recycling alcohol from butyl acrylate wastewater, and relates to a method for recycling butyl alcohol from process wastewater. Butyl alcohol taken away from clear water generated in esterification reaction and butyl alcohol taken away from sewage after neutralization are respectively recovered by means of reduced pressure and constant pressure. According to the method, alcohol taken away from the clear water generated in esterification reaction and alcohol taken away from the sewage after neutralization are respectively recovered by using two recovery towers, so that butyl alcohol in the process water is conveniently and efficiently recovered in continuous processes of reduced pressure distillation, constant pressure distillation, recovery of butyl alcohol and wastewater treatment. By using the method, the defect that the neutralized wastewater contains multiple impurity solids and a distillation tower is blocked by the impurity solids so that a vehicle is stopped or a device is damaged when butyl alcohol in butyl acrylate process wastewater is recovered by using the traditional method is overcome. The product manufactured by using the method is used as an extracting agent for oil grease, medicines ( like antibiotics, hormone and vitamins) and spices, an additive of an alkyd resin coating and the like, and also can be an organic dye, a solvent of printing oil ink and a dewaxing agent.
Description
technical field [0001] The invention relates to a method for recovering butanol in butyl acrylate wastewater, in particular to a method for recovering butanol respectively under reduced pressure and normal pressure for clear water and sewage generated by esterification reaction. Background technique [0002] Butanol is mainly used as an extractant for oils, drugs (such as antibiotics, hormones and vitamins) and spices, an additive for alkyd resin coatings, etc. It can also be used as a solvent for organic dyes and printing inks, and a dewaxing agent. Since the water generated in the production process of butyl acrylate and the wastewater generated in the subsequent neutralization process will take away part of butanol, the boiling point of butanol under normal pressure is 117.8 ° C, which is higher than that of water. Alcohol and water are separated. The traditional method is to directly recover the butanol taken away by the above two kinds of process wastewater through atmo...
Claims
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IPC IPC(8): C07C31/12C07C29/82
Inventor赵楚榜于冬娥朱宏文叶四华王风廖瑜曹传海陈世兴何文晖
Owner谦信化工集团有限公司