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Deacidification agent applied to methyl tert-butyl ether (MTBE) production device and preparation method for deacidification agent

A deacidification agent and product technology, applied in the field of deacidification agent, can solve the problems of catalyst poisoning, shorten the service life of the catalyst, increase the risk of methanol with sodium ions, etc., and achieve the effect of reducing corrosion and simple operation and management

Active Publication Date: 2014-02-19
KAIRUI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are two measures taken in the MTBE industrial installations: one is to replenish and drain a large amount of water into the circulating water system, which not only increases the consumption of water resources, but also increases the sewage treatment due to the high COD wastewater discharged outside. device load
The other is to add a certain amount of caustic soda to the circulating water to neutralize the acidic substances in the water and increase the pH value of the water, but this method increases the risk of sodium ions in the methanol recovered by rectification. The return of methanol to the etherification reactor will cause catalyst poisoning and shorten the service life of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1).Acylation reaction

[0027] Add the polymerized white balls of D113 ion exchange resin to dichloroethane solvent, the amount added is 3 times the mass of the polymerized white balls; stir at room temperature for 2 hours to fully swell the white balls; then add anhydrous aluminum chloride with a mass percentage of 30% of the polymerized white balls , polymerize chloroacetyl chloride with a mass percentage of white balls of 10%, heat up to 80°C; react for 8h; wash the product with dichloroethane until there is no aluminum ion, and obtain the intermediate product 1.

[0028] 2). Amination reaction

[0029] The intermediate product 1 and dimethylamine are added to the reactor at a mass ratio of 1:4, and then 2-methyl-4-trifluoromethylimidazole of 5% by mass percentage of the intermediate product 1 is added, and 80% of the mass percentage of the intermediate product 1 is Anhydrous zinc chloride, in a stirring state, heat up to 40°C; react for 40 hours; stop the reaction,...

Embodiment 2

[0033] In step 1, the polymerized white balls of D001 macroporous acrylic weakly acidic cation exchange resin are selected, and the others are the same as in Example 1. The resulting product number is KRB-2.

Embodiment 3

[0035] In step 1, select the polymerized white ball of D301 macroporous weakly basic acrylic anion exchange resin, and the others are the same as in Example 1. The resulting product number was KRB-3.

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PUM

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Abstract

The invention discloses a deacidification agent applied to a methyl tert-butyl ether (MTBE) production device. The deacidification agent is weak acid and weak base type amphoteric resin containing an amido imidazole functional group, and is prepared by the following steps of: reacting an aggregation white ball of styrene or acrylic acid macroporous cation exchange resin with chloroacetyl chloride to generate an acylation ball with an acetylchloride functional group; reacting the acylation ball with dimethylamine, fluorine-containing imidazole and a lewis acid catalyst to generate ion exchange resin containing an amino fluorine-containing imidazole functional group; and phosphorylating to finally generate the weak acid and weak base type amphoteric resin containing the amido imidazole functional group. When the deacidification agent is applied to the MTBE production device, a deacidification effect can be effectively improved.

Description

technical field [0001] The invention relates to an ion exchange resin, in particular to a deacidifying agent applied to an MTBE production device, and a preparation method thereof. Background technique [0002] MTBE (methyl tert-butyl ether) is the main additive and blending agent used to improve gasoline octane number and shock resistance in unleaded gasoline in recent years. Its production process is based on catalytic cracking of carbon four and ethylene produced by heavy oil cracking in refineries The by-product C4 is the raw material, and the isobutene and methanol undergo etherification reaction under the catalysis of acidic resin to generate methyl tert-butyl ether (MTBE). After the etherification reaction, the product is separated in a catalytic distillation tower or an azeotropic tower MTBE, excess methanol enters the methanol recovery system along with carbon four after ether, is extracted with water in the methanol extraction tower, and then enters the methanol re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J43/00
Inventor 王金明张勇
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH