System and method for continuously producing epoxypropane from industrial propane

Abstract

The invention discloses a system and a method for continuously producing epoxypropane from industrial propane. The system comprises a dehydrogenation unit and a separation unit which are connected with each other, wherein one part of propylene output of the separation unit is sent out of the system, the other part of propylene output is connected with an epoxidation unit, hydrogen output of the separation unit is connected with a hydrogen peroxide unit, and hydrogen peroxide output and methanol output of the hydrogen peroxide unit are connected with the epoxidation unit for epoxidation reaction to produce epoxypropane. According to the method, cheap propane, water and air are used as raw materials, a propane dehydrogenation byproduct, namely hydrogen is used as a raw material for preparing hydrogen peroxide, the yield of propylene is increased by 1.71-30.83 million tons per year, and the yield of the hydrogen byproduct is increased at the same time, so the technical purpose that the yield of hydrogen is the same as the required amount is achieved, and industrial continuous preparation of epoxypropane from propane is realized. The obtained product has purity of greater than or equal to 99.95 wt%, chromaticity of less than or equal to 5, aldehyde acid content of less than or equal to 0.008 wt%, and water content of less than or equal to 0.02 wt%.

Description

technical field [0001] The invention relates to a system and method for producing propylene oxide, in particular to a system and method for continuously producing propylene oxide from industrialized propane. Background technique [0002] The production technologies of propylene oxide PO at home and abroad mainly include chlorohydrin CHPO method, propylene oxide / styrene PO / SM co-oxidation method, propylene oxide / tert-butanol PO / TBA co-oxidation method, cumene oxidation CHPPO method And the hydrogen peroxide oxidation HPPO method, these technologies all use expensive propylene as the raw material for the preparation of propylene oxide, so the project construction investment payback period is longer. [0003] Patent CN200710010674.X discloses a device for the direct oxidation of propane and molecular oxygen to prepare propylene oxide, specifically disclosing that in the annular space formed by the double-layer glass medium, propane molecules generate isopropyl oxide under the a...

AI Technical Summary

Problems solved by technology

In this patent, the methanol used as a solvent is changed to the raw material of methanol to aromatics, and the consumption is huge. When producing propylene oxide products, a large amount of aromatics or ethylene and propylene are co-produced, and it is difficult to reduce the construction investment payback period of the propylene oxide project.

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