Technological method and apparatus for separating triethylamine in industrial waste solution

Abstract

The invention relates to a technological method and apparatus for separating triethylamine in industrial waste solution. Raw materials are preheated to 50 to 70 DEG C by virtue of a raw material preheater, and the preheated materials are separated by virtue of a primary phase separator to obtain a water phase and an oil phase. An azeotrope enters an azeotropic rectifying tower to remove water dissolved in triethylamine from the top of the aceotropic rectifying tower, and is condensed by virtue of a condenser and then enters a secondary phase separator, after the phase separation, an oil phaseand a water phase are obtained respectively, the oil phase is recycled to the azeotropic rectifying tower, and steam of a tower kettle is condensed by virtue of a product separation tower, a heat exchanger and the condenser and then enters a product receiving tank. The product is dried by a drying dehydration tower to obtain anhydrous triethylamine product. The water phase from the primary phase separator and the secondary phase separator is treated through a water phase treatment tower to remove the triethylamine dissolved in the water, the recycled triethylamine is returned to the raw material preheater, and the water of the tower kettle can be directly biochemically treated. The triethylamine product steam exchanges the heat with the raw materials, so that the heat energy loss can be reduced, the triethylamine can be well separated from the water, and the water content in the separated triethylamine product is low.

Description

technical field [0001] The invention relates to a process and a device for separating triethylamine from industrial waste liquid, and relates to the technical field of material separation. Background technique [0002] Triethylamine is an organic compound, named N,N-diethylethylamine systematically. It is a colorless and transparent liquid with a strong ammonia odor. It emits slight smoke in the air. It is soluble in water, soluble in ethanol and ether, and its aqueous solution is Weakly alkaline, flammable, explosive, toxic and highly irritating. Triethylamine is an important chemical raw material. It is often used as template agent in molecular sieve and catalyst synthesis industry and as catalyst in glyphosate production. During the corresponding production process, high-concentration triethylamine-containing wastewater will be discharged. Because triethylamine has strong biological toxicity, when the content exceeds 50mg / L, it will inhibit the growth of microorganisms, ...

AI Technical Summary

Problems solved by technology

Although this technical scheme realizes the separation of triethylamine and water mixed liquid, and does not need to use entrainer, but the whole process can not carry out repeated treatment to waste liquid, the primary yield of product is low, heat energy loss is big, and product The separation effect is not ideal

Images