Dewatering method for glycol production process

A production process, ethylene glycol technology, applied in the chemical industry, can solve the problems affecting the production cost of ethylene glycol, long production process, energy and water consumption, etc., and achieve the effect of long service life, short process and high dehydration depth

Active Publication Date: 2013-03-06
ALLY HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the production process is long, the equipment is large, and the energy consumption is high, which directly affects the production cost of ethylene glycol; Hydrolysis, dehydration and rectification of al...

Method used

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  • Dewatering method for glycol production process
  • Dewatering method for glycol production process
  • Dewatering method for glycol production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A kind of dehydration method in the ethylene glycol production process, the working process of its adsorption tower A and adsorption tower B comprises the following steps:

[0051] a', the raw material ethylene glycol solution is vaporized by the vaporization superheater, and after being heated by the heater, the valve V102 is opened to allow the ethylene glycol vapor to pass through the adsorption tower B from top to bottom through the valve KC05, and the room temperature and adsorption pressure in the adsorption tower B Under the condition of 0.1Mpa, the adsorption is carried out on the molecular sieve bed for 3-10 minutes; the gas after adsorption is condensed through the one-way valve V108 and the condenser, and then discharged, and the gas after the adsorption can get 99.5% ( For ethylene glycol above V / V%), after the adsorption is completed, close the valve KC05, stop feeding the raw material gas, and heat and vaporize at a temperature of 150-170°C.

[0052] ...

Embodiment 2

[0065] A kind of dehydration method in the ethylene glycol production process, the working process of its adsorption tower A and adsorption tower B comprises the following steps:

[0066] The raw material ethylene glycol solution is vaporized by the vaporization superheater, and after being heated by the heater, the valve V102 is opened, so that the ethylene glycol vapor passes through the valve KC05 and passes through the adsorption tower B from top to bottom. The normal temperature and adsorption pressure in the adsorption tower B are 0.1Mpa Adsorption is carried out on the molecular sieve bed for 8 minutes under certain conditions; the adsorbed gas is condensed through the one-way valve V108 and the condenser, and then discharged, and the adsorbed gas can obtain 99.5% (V / V%) after passing through the condenser After the above ethylene glycol is adsorbed, close the valve KC05 and stop feeding the raw material gas.

[0067] a. Adsorption: The raw material ethylene glyco...

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Abstract

The invention relates to a dewatering method for a glycol production process. The dewatering method comprises the technological steps of an absorption adsorption tower A and an absorption adsorption tower B, wherein the absorption adsorption tower A has the following operation steps of a. , absorptionadsorption: delivering glycol steam into the absorption adsorption tower A to absorbadsorb, condensing, collecting the glycol, and stopping to delivering the raw material gas after absorbingadsorbing; b. , reverse pressure drop: opening a valve to carry out reverse pressure drop, desorbing the impurity components, and emptying; c. , temperature raising: heating the absorbed adsorbed regeneration gas, and delivering the absorbed adsorbed regeneration gas into the absorption adsorption tower A, so as to regenerate an absorbing adsorbing agent; d. , cooling; and e. , pressure raising pressure. The operation steps of the absorption adsorption tower B are the same as the operation steps of the absorption adsorption tower A, but the times are mutually staggered. The dewatering method has the advantages that the fault-free operation is realized, the annual operation time can reach more than 300 days, the flow process is short, the investment is saved, the recovery rate of the glycol is high, the service life of the absorbing adsorbing agent is long, and the replacement time of the absorbing adsorbing agent is generally 15 to 20 years under normal operation conditions.

Description

Technical field [0001] The invention involves a dehydration method in the chemical field, which is specifically a dehydration method in the production process of ethan glycol. Background technique [0002] Ethylene Glycol (EG or MEG) is commonly known as glycol. It is the simplest alipan glycol and an important organic chemical raw material.It can be used as a production raw material for antifreeze, lubricant, plasticizer, surfactant, etc.Therefore, ethylene glycol is a basic organic chemical material with extensive use. [0003] At present, the main method of industrialization of ethylene glycol at home and abroad is that the direct water of ethylene oxide is legal.Ethylene and oxygen as the raw material, under the presence of silver catalysts, methane or nitrogen stabilizers, chloride inhibitors, ethylene directly oxidize ethylene oxide, and hydrophilic reactions are performed in the tube reactor to generate ethylene glycol, ethyl two two, ethyl two two, ethyl two two.Alcohol s...

Claims

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Application Information

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IPC IPC(8): C07C31/20C07C29/76
Inventor 沈静王业勤杜雯雯
Owner ALLY HI TECH CO LTD
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