Wastewater separation device of dibutyl phthalate production system

Abstract

The invention discloses a wastewater separation device of a dibutyl phthalate production system. The wastewater separation device comprises a horizontal separation tank, a heating tank, a wastewater tower, a condenser and a liquid separation tank, wherein a feeding port is formed in the front end of the horizontal separation tank, an ester returning port is formed in the top of the back end of the horizontal separation tank, a wastewater drain outlet is formed in the bottom of the back end of the horizontal separation tank and communicated with the heating tank, the wastewater tower is arranged at the top of the heating tank, the top of the wastewater tower is communicated with a gas inlet of the condenser, a liquid outlet of the condenser is communicated with the upper end of the liquid separation tank, and the liquid separation tank is provided with an alcohol outlet and a water outlet positioned below the alcohol outlet. The wastewater separation device of the dibutyl phthalate production system has the advantages that products and raw materials are recycled effectively, environmental pollution is reduced and later-period water treatment cost is lowered.

Description

technical field [0001] The invention relates to the technical field of dibutyl phthalate production, in particular to a wastewater separation device for a dibutyl phthalate production system. Background technique [0002] Dibutyl phthalate is the most commonly used plasticizer for polyvinyl chloride, which can make the product have good flexibility, but its volatility and water extraction are relatively high, so its durability is poor. Dibutyl phthalate is an excellent plasticizer for nitrocellulose, with strong gelling ability, used in nitrocellulose coatings, and has good softening effect. Stability, flex resistance, adhesion and water resistance are superior to other plasticizers. Dibutyl phthalate can also be used as a plasticizer for polyvinyl acetate, alkyd resin, nitrocellulose, ethyl cellulose, neoprene, and nitrile rubber. [0003] The production process of dibutyl phthalate: phthalic anhydride and alcohol are heated and reacted in sulfuric acid as a catalyst to p...

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Problems solved by technology

[0004] Dibutyl phthalate will produce a large amount of waste water during the production process. The waste water contains some alcohols and esters. If it is not recycled in time, it will cause waste of raw materials on the one hand and pollute the environment on the other hand.

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