Process method for producing ethylene glycol mono-tert-butyl ether

A technology of mono-tert-butyl ether and process method, applied in the field of chemical product production technology, can solve problems such as low content of ethylene glycol mono-tert-butyl ether, and achieve the effect of improving market value

Active Publication Date: 2018-01-09
CHAMBROAD CHEM IND RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of low content of ethylene glycol mono-tert-butyl ether prepared by steam azeotropic distillation, the present invention uses ordinary ethylene glycol mono-tert-butyl ether as raw material and adds a certain proportion ...

Method used

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  • Process method for producing ethylene glycol mono-tert-butyl ether
  • Process method for producing ethylene glycol mono-tert-butyl ether
  • Process method for producing ethylene glycol mono-tert-butyl ether

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A kind of processing method of producing ethylene glycol mono-tert-butyl ether, this processing method is realized by following device:

[0028] The used device for producing ethylene glycol mono-tert-butyl ether, the 1-ethylene glycol mono-tert-butyl ether refining tower feed pump is connected to the lower part of the 2-ethylene glycol mono-tert-butyl ether refining tower through pipeline a, 2- The top of the ethylene glycol mono-tert-butyl ether refining tower is connected to the circulation tank of the 7-ethylene glycol mono-tert-butyl ether refining tower through pipeline b, and the top of the 7-ethylene glycol mono-tert-butyl ether refining tower circulation tank is passed through the pipeline c is connected with 2-ethylene glycol mono-tert-butyl ether refining tower; the bottom of 2-ethylene glycol mono-tert-butyl ether refining tower is connected with the lower part by pipeline d; described 2-ethylene glycol mono-tert-butyl ether The bottom of the refining tower ...

Embodiment 2

[0031]The ordinary ethylene glycol mono-tert-butyl ether product with ethylene glycol mono-tert-butyl ether content of 98.5%, ethylene glycol bis-tert-butyl ether content of 0.6%, and water content of 0.9% is used as rectification raw material, and isoamyl acetate As an entrainer, it is sent to the ethylene glycol refining tower for azeotropic distillation; the amount of isoamyl acetate added is twice the total mass of ethylene glycol bis-tert-butyl ether and water, and the rectifying pressure is normal pressure , the extraction temperature at the top of the tower is 85-87°C, and the temperature of the tower bottom is 120-122°C, the heavy components are extracted from the bottom of the ethylene glycol mono-tert-butyl ether refining tower, and after being condensed by the condenser to 40°C, the Airspeed 2.0h -1 Remove the remaining trace water through the ethylene glycol mono-tert-butyl ether purifier equipped with 5A molecular sieves to obtain high-quality ethylene glycol mono...

Embodiment 3

[0033] The ordinary ethylene glycol mono-tert-butyl ether product with ethylene glycol mono-tert-butyl ether content of 98.5%, ethylene glycol bis-tert-butyl ether content of 0.6%, and water content of 0.9% is used as the rectification raw material, and isoamyl alcohol is used as the The entrainer is sent to the ethylene glycol refining tower for azeotropic distillation; the addition of isoamyl alcohol is twice the total mass of ethylene glycol di-tert-butyl ether and water, and the rectifying pressure is normal pressure. Under the condition that the top extraction temperature is 92-95°C and the tower tank temperature is 123-125°C, the heavy components are extracted from the bottom of the ethylene glycol mono-tert-butyl ether refining tower, and after being condensed by the condenser to 40°C, the 2.0h -1 Remove the remaining trace water through the ethylene glycol mono-tert-butyl ether purifier equipped with 5A molecular sieves to obtain high-quality ethylene glycol mono-tert-...

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Abstract

The invention discloses a process method for producing ethylene glycol mono-tert-butyl ether and belongs to the field of process production of chemical products. The production process comprises the following steps: taking common ethylene glycol mono-tert-butyl ether as a raw material, adding a certain proportion of a special entrainer, carrying out azeotropic distillation under certain conditions, and rectifying out impurities, namely ethylene glycol tert-dibutyl ether and water in the ethylene glycol mono-tert-butyl ether, so that the content of the product ethylene glycol mono-tert-butyl ether is greater than or equal to 99.9 percent, the content of the ethylene glycol tert-dibutyl ether is smaller than 500 ppm and the water content is smaller than 100 ppm; the process method can be used for the fields of pharmaceutical intermediates, high-end coatings, high-end electronic cleaning agents and the like. The process has the advantages of simplicity, low energy consumption, high purityof products, environment friendliness and the like; the entrainer is simple in separation and can be recycled; in addition, the process is an advanced production process of the ethylene glycol mono-tert-butyl ether with high quality.

Description

technical field [0001] The invention relates to the technical field of chemical product production technology, in particular to a process for producing high-quality ethylene glycol mono-tert-butyl ether Background technique [0002] As a product with low photochemical reactivity, ethylene glycol mono-tert-butyl ether (ETB) can be used as a substitute solvent for ethylene glycol butyl ether (EB) in some fields, and it is a new type of environmentally friendly solvent. Compared with EB, ETB has the advantages of good water solubility, good latex dispersion stability, good aqueous solution volatility, mild skin irritation, and low photochemical reactivity; it can be widely used in water-based paint solvents, paint solvents, ink dispersants, Household cleaning agents, fuel additives and other fields. High-quality ethylene glycol mono-tert-butyl ether can be used as a cleaning solution, stripping agent, industrial cleaning agent, and photoresist buffer in liquid crystal display ...

Claims

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Application Information

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IPC IPC(8): C07C43/13C07C41/42C07C41/36
Inventor 龙显灵马韵升张凤岐陈梅梅刘克锋李艳芳刘鹏郭亮王旭亮
Owner CHAMBROAD CHEM IND RES INST CO LTD
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