Anion exchange resin production system and production technology

Abstract

The invention relates to a production system used for anion exchange resin and production technology. The production technology comprises chloromethylether production technology, chloromethylation production technology, chlorine ball cleaning technology, an amination reaction, and washing technology and obtains the finished product anion resin finally. Chloromethylether needed by producing the anion resin first time is prepared by a chemical reaction generated by solid formaldehyde, methanol and gas hydrochloric acid. The system and the technology are characterized in that a chloridization mother liquor generated by the chloromethylation production technology and a cleaning solution generated by the chlorine ball cleaning technology are sent to chloridization solution recovering technology. Chloridization methanol in the chloridization mother liquor reacts with the additive solid formaldehyde and chloride hydrogen gas to obtain the chloromethylether directly taken as a raw material for circulating the anion resin production and circulate in the way to obtain the chloromethylether.

Description

technical field [0001] The invention relates to a system and a production process for anion exchange resin production, and belongs to the field of anion resin production equipment and production methods. Background technique [0002] In the existing system and production process of anion effect resin, the first is the preparation of chloromethyl ether, which adopts the reaction of methanol with liquid formaldehyde and chlorosulfonic acid to prepare chloromethyl ether, and the reaction formula is: methanol+liquid formaldehyde+chlorine Sulfonic acid → chloromethyl ether + sulfuric acid. Its shortcoming is: although the preparation of this technology can obtain chloromethyl ether, but when producing chloromethyl ether, produced the sulfuric acid containing HCL, this sulfuric acid not only can't be used for the production of phosphate fertilizer, and directly affects the environment Produce serious pollution; The 2nd, adopt liquid formaldehyde and hydrochloric acid to participa...

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Problems solved by technology

Its shortcoming is: although the preparation of this technology can obtain chloromethyl ether, but when producing chloromethyl ether, produced the sulfuric acid containing HCL, this sulfuric acid not only can't be used for the production of phosphate fertilizer, and directly affects the environment Produce serious pollution; the 2nd, adopt liquid formaldehyde and hydrochloric acid to participate in chloromethyl ether production, because formaldehyde is formaldehyde below 37% in liquid formaldehyde, and more than 63% is water, so will produce a large amount of waste liquids in production

Due to the extremely high cost of secondary treatment of the waste liquid, the general user does not process the liquid, but directly discharges it, which causes great pollution to the environment and directly increases the production cost of the anion exchange resin; the second is to use hydrochloric acid for the reaction, And get hydrogen chloride gas from the reaction of hydrochloric acid

Since the hydrogen chloride contained in hydrochloric acid only accounts for about 30%, the use of hydrochloric acid to obtain hydrogen chloride not only increases the production cost, but also produces a large amount of waste liquid while obtaining hydrogen chloride, causing environmental pollution. In view of this, most manufacturers have to purchase Chloromethyl ether is used in the production of anion resin

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