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Device and method used for producing ethylene glycol diacetate from low concentration glycol

A technology of diacetate and ethylene glycol, which is applied in the field of production of ethylene glycol diacetate, can solve the problems of ethylene glycol waste, economic benefit reduction, environmental protection pressure, and inability to produce benefits, etc., to achieve excellent product quality , Obvious economic benefits and environmental advantages

Pending Publication Date: 2019-11-08
KAIRUI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of waste cannot produce benefits, and even requires other companies to dispose of it at a cost, resulting in waste of ethylene glycol, resulting in a decline in economic benefits and pressure on environmental protection

Method used

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  • Device and method used for producing ethylene glycol diacetate from low concentration glycol
  • Device and method used for producing ethylene glycol diacetate from low concentration glycol

Examples

Experimental program
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Effect test

Embodiment 1

[0066] A method utilizing low-concentration ethylene glycol to produce high-concentration ethylene glycol diacetate, specifically comprising the following steps:

[0067] (1) Esterification reaction: Acetic acid and ethylene glycol (molar ratio is 2.4:1) are heated to 65-70°C by the preheater, and then passed into the fixed bed reactor through the feed port I, and the space velocity is 0.8h -1 , acetic acid and ethylene glycol are catalyzed by catalyst A in the fixed-bed reactor to carry out esterification reaction under the conditions of 65-70°C and 0.7-0.8Mpa to obtain the primary reaction product; the primary reaction product flows through the discharge Port I and feed port II enter the catalytic distillation tower;

[0068] The ethylene glycol raw material is the waste produced in the ethylene glycol production process, wherein the concentration of ethylene glycol is 30%, the concentration of heavy substances that do not participate in the reaction is 10%, and the rest is...

Embodiment 2

[0085] A method utilizing low-concentration ethylene glycol to produce high-concentration ethylene glycol diacetate, specifically comprising the following steps:

[0086] (1) Esterification reaction: Acetic acid and ethylene glycol (molar ratio is 2.4:1) are heated to 65-70°C by the preheater, and then passed into the fixed bed reactor through the feed port I, and the space velocity is 0.8h -1 , acetic acid and ethylene glycol are catalyzed by catalyst A in the fixed-bed reactor to carry out esterification reaction under the conditions of 65-70 ° C and 0.7-0.8 MPa to obtain primary reaction products; the primary reaction products flow through the discharge Port I and feed port II enter the catalytic distillation tower;

[0087] The ethylene glycol raw material is the waste produced in the ethylene glycol production process, wherein the concentration of ethylene glycol is 50%, the concentration of heavy substances that do not participate in the reaction is 10%, and the rest is...

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Abstract

The invention discloses a device and a method used for producing ethylene glycol diacetate from low concentration glycol. The device comprises a pre-heater, a fixed bed reactor, a catalytic distillation column, a heavy component removing column, a light component removing column, and a refining column which are connected successively; low concentration glycol and acetic acid are reacted in the fixed bed reactor; a primary product is introduced into the catalytic distillation column for continuous catalytic distillation reaction, and is separated; tower bottom heavy components are introduced into the heavy component removing column for separation; tower top products from the heavy component removing column are introduced into the light component removing column for separation; tower bottomproducts from the light component removing column are introduced into the refining column for refining; and the finished product ethylene glycol diacetate is discharged through the tower top of the refining column. According to the method, waste generated in glycol production process is taken as a raw material, waste is changed into valuables, glycol concentration is not lower than 20%, the concentration of the obtained ethylene glycol diacetate is 99.0% or higher, ethylene glycol monoacetate concentration is 1% or lower, water concentration is 0.1% or lower, and acetic acid concentration is 0.2% or lower.

Description

technical field [0001] The invention relates to a device and method for producing ethylene glycol diacetate, in particular to a device and method for producing ethylene glycol diacetate using low-concentration ethylene glycol, and further relates to a device and method for producing ethylene glycol diacetate using low-concentration ethylene glycol A device and method for producing high-concentration ethylene glycol diacetate from alcohol. Background technique [0002] Ethylene glycol diacetate, also known as ethylene glycol diacetate or ethylene glycol diacetate, is a colorless liquid with a boiling point of 190.2°C. It is an efficient, safe, non-toxic and environmentally friendly organic solvent. Widely used in the pharmaceutical industry, casting resin organic ester curing agent, and also as an excellent solvent for various organic resins, especially nitrocellulose, and raw materials for leather brighteners; in paints and coatings as nitro spray paint, printing ink, cellul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/16
CPCC07C67/08C07C69/16Y02P20/10
Inventor 葛立军王磐路华良
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH