System and method of coproduction of propylene oxide and arene

A technology for the reaction of propylene oxide and aromatic hydrocarbons, applied in the field of chemical process, can solve the problems of large amount of solvent recovery, difficult environmental treatment of waste residue and waste gas, and high investment in solvent recovery equipment, and achieves the effect of reducing steam consumption.

Active Publication Date: 2018-12-14
HUADIAN COAL IND GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Propylene oxide (PO) is a basic chemical product of petrochemical industry. The methods for producing propylene oxide include the chlorohydrin method and the direct oxidation method of hydrogen peroxide; the chlorohydrin method is a traditional PO industrial production route, but the process requires a Chlorine gas seriously corrodes equipment, discharges a large amount of waste water containing CaCl2, waste residue and waste gas pollute the environment and is difficult to treat; the direct hydrogen peroxide oxidation method is a new process for the preparation of propylene oxide due to its simple process, few by-products and green pollution-free, but , the process uses methanol as a solvent in the oxidation process, water, propylene glycol, propylene glycol methyl ether and other substances will be generated in methanol during the oxidation process, and methanol solvent needs to be recovered
Among them, the investment in solvent recovery equipment is high, and the amount of solvent recovery is large. The methanol required for the production of one ton of propylene oxide solvent recovery reaches 5-8 tons of steam (0.8MPa)
At the same time, due to the difficulty of long-distance transportation of hydrogen peroxide, the source of hydrogen peroxide needs to be considered

Method used

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  • System and method of coproduction of propylene oxide and arene
  • System and method of coproduction of propylene oxide and arene
  • System and method of coproduction of propylene oxide and arene

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1, with reference to figure 2 , a system for the co-production of hydrocarbons from propylene oxide, comprising a hydrogen peroxide synthesis unit 1, the output of the hydrogen peroxide synthesis unit 1 is connected to the first input of the propylene oxide synthesis unit 2, the second input of the propylene oxide synthesis unit 2 and propylene Pipeline connection, propylene oxide output of propylene oxide synthesis unit 2 and input connection of propylene oxide refining unit 3, solvent methanol output of propylene oxide synthesis unit 2 and first input connection of methanol-to-aromatics reaction unit 4-2, The output of the methanol-to-aromatics reaction unit 4-2 is connected to the input of the gas-liquid-liquid three-phase separation unit 5, the first output of the gas-liquid-liquid three-phase separation unit 5 is connected to the input of the light hydrocarbon separation unit 6, and the light hydrocarbon separation unit 6 The output of C3, C4, C5 hydroc...

Embodiment 2

[0030] Embodiment 2, with reference to image 3 , a system for the co-production of hydrocarbons from propylene oxide, comprising a hydrogen peroxide synthesis unit 1, the output of the hydrogen peroxide synthesis unit 1 is connected to the first input of the propylene oxide synthesis unit 2, the propylene oxide output of the propylene oxide synthesis unit 2 and The input connection of propylene oxide refining unit 3, the solvent methanol output of propylene oxide synthesis unit 2 and the first input connection of methanol to aromatics reaction unit 4-2, the output of methanol to aromatics reaction unit 4-2 and gas-liquid-liquid three-phase The input connection of the separation unit 5, the first output of the gas-liquid-liquid three-phase separation unit 5 and the input connection of the light hydrocarbon separation unit 6, the C4 and C5 hydrocarbon output of the light hydrocarbon separation unit 6 and the reaction unit 4-2 of methanol to aromatics The second input connection...

Embodiment 3

[0034] Embodiment 3, with reference to Figure 4 , a system for the co-production of hydrocarbons from propylene oxide, comprising a hydrogen peroxide synthesis unit 1, the output of the hydrogen peroxide synthesis unit 1 is connected to the first input of the propylene oxide synthesis unit 2, the propylene oxide output of the propylene oxide synthesis unit 2 and The input connection of propylene oxide refining unit 3, the solvent methanol output of propylene oxide synthesis unit 2 and the first input connection of methanol to olefins reaction unit 4-3, the output of methanol to olefins reaction unit 4-3 and gas-liquid-liquid three-phase The input connection of the separation unit 5, the first output of the gas-liquid-liquid three-phase separation unit 5 and the input connection of the light hydrocarbon separation unit 6, the C4 and C5 hydrocarbon output of the light hydrocarbon separation unit 6 and the methanol-to-olefins reaction unit 4-3 The second input connection of the ...

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Abstract

The invention relates to a system and method of coproduction of propylene oxide and arene. A solvent namely methanol in the production course of the propylene oxide is used for the course of preparinghydrocarbon with the methanol, and besides, byproducts of hydrogen gas and propylene in the course of preparing the hydrocarbon with the methanol are used for preparing a hydrogen peroxide solution,so that the source problem of the hydrogen peroxide solution is solved; and a product byproduct namely the propylene is used as the raw material of the propylene oxide, so that the production technology and the energy consumption of the propylene oxide are reduced. Through the adoption of the system and method disclosed by the invention, steam consumption of production of the propylene oxide is substantially reduced, and the reduction of the steam consumption quantity reaches 50% or above.

Description

technical field [0001] The invention belongs to the field of chemical process, and in particular relates to a system and method for co-producing hydrocarbons from propylene oxide. Background technique [0002] Propylene oxide (PO) is a basic chemical product of petrochemical industry. The methods for producing propylene oxide include the chlorohydrin method and the direct oxidation method of hydrogen peroxide; the chlorohydrin method is a traditional PO industrial production route, but the process requires a Chlorine gas seriously corrodes equipment, discharges a large amount of waste water containing CaCl2, waste residue and waste gas pollute the environment and is difficult to treat; the direct hydrogen peroxide oxidation method is a new process for the preparation of propylene oxide due to its simple process, few by-products and green pollution-free, but , the process uses methanol as a solvent in the oxidation process, water, propylene glycol, propylene glycol methyl eth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/12C07D303/04C07C1/20C07C15/02
CPCC07C1/20C07C15/02C07D301/12C07D303/04
Inventor 崔宇黄晓凡汤效平王彤骞伟中高长平王秀林殷作如王旺旺
Owner HUADIAN COAL IND GRP
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