An oil superheater-based feed system for phthalic anhydride production

Abstract

The invention discloses a feed system based on an oil superheater for the production of phthalic anhydride, which includes a tube reactor, a feed tube is arranged on the outer surface of the upper end of the tube reactor, and one of the feed tubes is The outer surface of the side is provided with an air pipe, the outer surface of one side of the tube reactor is provided with a crude benzene storage bin, the outer surface of the upper end of the crude benzene storage bin is provided with an oil superheater, and the other side of the crude benzene storage bin A steam generator is arranged on the outer surface of one side. The other outer surface of the steam generator is provided with a first distillation tower, the upper outer surface of the first distillation tower is provided with a waste gas filter mechanism, and the other outer surface of the first distillation tower is provided with a connecting pipe . A feed system based on an oil superheater for the production of phthalic anhydride according to the present invention facilitates the production of phthalic anhydride, increases safety, and prevents waste gas from being directly discharged, causing pollution, etc., bringing Better prospects for use.

Description

technical field [0001] The invention relates to the field of phthalic anhydride, in particular to a feed system based on an oil superheater for the production of phthalic anhydride. Background technique [0002] Phthalic anhydride, the full name of phthalic anhydride, as an important organic chemical raw material, is mainly used in the production of phthalic plasticizers, unsaturated polyester resins, alkyd resins, etc., and is widely used in plastics, coatings, synthetic materials, etc. In other fields, a small amount is used in the production of dyes, pharmaceuticals, pesticide intermediates and saccharin. Among them, 95% of the total amount of plasticizers (80% are phthalic plasticizers) are used for the processing of polyvinyl chloride (PVC) plastics, and the dominant position of phthalic plasticizers is difficult to shake. Due to the good plasticity and excellent performance of plastic products, they have already become substitutes for wood, cotton, etc., and the marke...

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Problems solved by technology

The traditional naphthalene process (fluidized bed) has high unit consumption of raw materials, low phthalic anhydride yield, unstable product quality, and pollution; the ortho-phthalic anhydride process has stable production, high yield, clean and environmentally friendly, and product quality is guaranteed, but , in recent years, due to the tight supply of raw material o-benzene, the price has been rising continuously, and the price of product raw materials has been inverted. , so that the temperature of naphthalene gas cannot be raised, resulting in a lack of safety

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