Recycling system of chlorination mother solution and recycling method thereof

Abstract

The invention relates to a recycling system of chlorination mother solution and a recycling method thereof in an automatic anion exchange resin production system, white ball and chloromethyl ether are sent to a chloromethylation reaction kettle respectively by an airflow transmitting system and pump transmission, stirring is carried out at normal temperature; after inflating, ferric trichloride dissolvable in the chloromethyl ether is added for catalysis, and exothermic reaction is generated, the adding speed of the chloromethyl ether is regulated according to temperature, chlorine ball is prepared after the temperature is raised to 48 DEG C and temperature insulation is carried out for 10 hours, temperature reduction is carried out, the separated chlorine ball is washed sequentially by chloride methanol for two times, and by methanol for one time; then, solid-liquid separation is carried out, solid-phase chlorine ball enters amination reaction, liquid-phase chlorination mother solution and chlorine ball cleaning solution enter a chlorination liquid recycling reaction kettle, chloride methanol generated in the chlorination liquid recycling reaction kettle enters a chloromethyl ether reaction kettle; and then, solid methanol and chlorine hydride are added in the chloromethyl ether reaction kettle for reaction, chloromethyl ether volatilized in the reaction process enters a chloromethylation reaction kettle after condensation by a condenser, and noncondensable gas enters an alkali spray tower for absorption treatment.

Description

technical field [0001] The invention relates to a recycling system and a recycling method for chlorinated mother liquor in an anion exchange resin automatic production system, and belongs to the field of anion exchange resin production systems and production methods. Background technique [0002] In the production of chloromethyl ether, liquid formaldehyde and hydrochloric acid are generally used to participate in the production of chloromethyl ether. Since less than 37% of the liquid formaldehyde is formaldehyde and more than 63% is water, a large amount of waste liquid will be generated in the 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 ...

AI Technical Summary

Problems solved by technology

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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