A high-efficiency and energy-saving reaction process and reaction system for alcohol ether ester solvents

Abstract

The invention discloses an efficient and energy-saving reaction process for an alcohol ether solvent and a reaction system of the reaction process, and relates to the technical field of chemical production equipment. The reaction process comprises the following steps: (1) respectively feeding an alcohol ether solvent and ethyl acetate into a static mixer from a glycol ether or propylene glycol ether pump and an ethyl acetate feeding pump according to a ratio of (1:1)-(1:3), uniformly mixing, feeding into a reactive distillation column, and implementing a reaction, wherein the reaction pressure is 0.1-3MPa, and the reaction temperature is 90-110 DEG C; (2) pressurizing, removing excessive ethyl acetate and ethanol generated from the reaction from the top of the reactive distillation column, and recycling the ethyl acetate as first ester into an ethyl acetate esterification system; (3) feeding an alcohol ether ester solvent generated from the reaction and an unreacted alcohol ether solvent into a light component removal tower, and removing the unreacted alcohol ether solvent, thereby obtaining a finished product of the alcohol ether ester solvent from the bottom of the light component removal tower. The reaction process is high in conversion rate, low in cost and convenient in separation, and the utilization rate of ethyl acetate is increased.

Description

technical field [0001] The invention relates to the technical field of chemical production equipment, in particular to a high-efficiency and energy-saving reaction process and a reaction system for alcohol ether ester solvents. Background technique [0002] The molecular structure of alcohol ether ester solvents contains alkyl groups, ether bonds, and carbonyl groups. They have good solubility and are widely used in the coating industry. The traditional process for industrially preparing alcohol ether ester solvents is to obtain alcohol ether esters through the esterification reaction between alcohol ethers and acids. This process generates water, and water is miscible with alcohol ethers and alcohol ether esters. Boiling separation, the energy consumption of separation is high, and the raw material contains acetic acid, which corrodes the equipment, and this method limits the use of alkaline catalysts, the acidity of the product needs to be strictly controlled, and industri...

AI Technical Summary

Problems solved by technology

The traditional process for industrially preparing alcohol ether ester solvents is to obtain alcohol ether esters through the esterification reaction between alcohol ethers and acids. This process generates water, and water is miscible with alcohol ethers and alcohol ether esters. Boiling separation, the energy consumption of separation is high, and the raw material contains acetic acid, which corrodes the instrument, and this method limits the use of alkaline catalysts, the acidity of the product needs to be strictly controlled, and industrial wastewater will be generated during the production process.

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