Process for continuously producing epoxy propane through propylene and propane mixed gas directly oxidized by hydrogen peroxide

A technology of propylene oxide and mixed gas, applied in chemical recovery, organic chemistry, etc., can solve the problems of high equipment cost, high process operation pressure, large amount of waste water and waste residue, etc., and achieve the effect of reducing energy consumption

Active Publication Date: 2014-11-05
HENAN JUNHUA DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The methods for industrial production of propylene oxide mainly include the chlorohydrin method and the co-oxidation method. The chlorohydrin method has a mature production process and does not require high purity of raw material propylene, but a large amount of waste water and waste residues are produced in the production process. With people's awareness of environmental protection This method will be eliminated; although the co-oxidation method overcomes the shortcomings of the chlorohydrin method with a large amount of waste water and waste residue, it is also severely restricted due to the high requirements for propylene purity, high process operation pressure, and high equipment cost.

Method used

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  • Process for continuously producing epoxy propane through propylene and propane mixed gas directly oxidized by hydrogen peroxide
  • Process for continuously producing epoxy propane through propylene and propane mixed gas directly oxidized by hydrogen peroxide
  • Process for continuously producing epoxy propane through propylene and propane mixed gas directly oxidized by hydrogen peroxide

Examples

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example 1

[0027] Such as figure 1Shown flow process, the propylene / propane gas mixture of 500Kg / h (propylene volume content is 90%, and propane volume content is 10%), the mass fraction of 920Kg / h is 27.5% hydrogen peroxide aqueous solution and solvent methyl alcohol, enter flow stream through pipeline respectively The bed loop reactor R1, while the catalyst slurry enters the reactor R1 at a flow rate of 50Kg / h, wherein the molar ratio of propylene:propane:hydrogen peroxide:methanol is 1.43:0.16:1:15, and the reaction temperature of the reactor R1 is 45°C. The reaction pressure is maintained at 1.0MPa, and the unreacted oxypropylene / propane gas mixture is taken out from the top of the reactor R1, and the recovered methanol solvent is used to spray and absorb the oxypropylene in the spray absorption tower T5, and then recycled to the reactor R1, sprayed The operating pressure of the leaching absorption tower T5 is 1.5MPa, and the operating temperature is 0°C. The propylene / propane mixed...

example 2

[0029] Such as figure 1 Shown flow process, the propylene / propane gas mixture of 500Kg / h (the propylene volume content is 80%, and the propane volume content is 20%), the mass fraction of 691Kg / h is 27.5% hydrogen peroxide aqueous solution and solvent methyl alcohol, enter flow stream through pipeline respectively The bed loop reactor R1, while the catalyst slurry enters the reactor R1 at a flow rate of 50Kg / h, wherein the molar ratio of propylene:propane:hydrogen peroxide:methanol is 1.27:0.32:1:15, and the reaction temperature of the reactor R1 is 80°C. The reaction pressure is maintained at 0.2MPa, and the unreacted oxygen-containing propylene / propane mixture gas is extracted from the top of the reactor R1, and the recovered methanol solvent is used to absorb the oxygen-containing propylene in the bubbling absorption tower T5, and then circulated to the reactor R1, and the bubbling absorption The operating pressure of column T5 is 0.8 MPa, and the operating temperature is -...

example 3

[0031] Such as figure 1 Shown flow process, the propylene / propane mixed gas of 500Kg / h (propylene volume content is 70%, and propane volume content is 30%), the mass fraction of 691Kg / h is 27.5% hydrogen peroxide aqueous solution and solvent methyl alcohol, enter flow stream through pipeline respectively The bed loop reactor R1, while the catalyst slurry enters the reactor R1 at a flow rate of 50Kg / h, wherein the molar ratio of propylene:propane:hydrogen peroxide:methanol is 1.11:0.48:1:24, and the reaction temperature of the reactor R1 is 20°C. The reaction pressure is maintained at 0.6MPa, and the unreacted oxygen-containing propylene / propane gas mixture is extracted from the top of the reactor R1, and the recovered methanol solvent is used to absorb the oxygen-containing propylene in the Venturi injector absorption tower T5 and then recycled to the reactor R1. The operating pressure of the Venturi ejector absorption tower T5 is 0.02MPa, and the operating temperature is 30°C...

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Abstract

The invention discloses a process for continuously producing epoxy propane through propylene and propane mixed gas directly oxidized by hydrogen peroxide. In the reaction process, a fluidized bed circulation flow reactor is adopted, and a fine particle molecular sieve catalyst is used. The process comprises the following steps: discharging slurry to pass trough a flash column, respectively flashing low-oxygen propylene / propane mixed gas and epoxy propane, separating catalyst slurry and mother solution in the catalyst-containing mother solution through a membrane separator, performing flash separation on methanol in the mother solution, synchronously recovering the reacted residual high-oxygen propylene / propane mixed gas for recycling in a high-oxygen propylene / propane absorption tower by utilizing a recovery solvent methanol, and regenerating an online part of the catalyst slurry to return to the reactor for recycling. According to the process, the stability and continuity of the process for producing the epoxy propane through propylene and propane mixed gas directly oxidized by hydrogen peroxide are realized.

Description

technical field [0001] The invention relates to a technological process for continuously producing propylene oxide by directly oxidizing propylene / propane mixed gas by using hydrogen peroxide aqueous solution as an oxidant, methanol as a solvent, and fine-grained titanium-silicon molecular sieve as a catalyst. The process belongs to an energy-saving, green and clean continuous production environment. Oxypropane new technology. Background technique [0002] The methods for industrial production of propylene oxide mainly include the chlorohydrin method and the co-oxidation method. The chlorohydrin method has a mature production process and does not require high purity of raw material propylene, but a large amount of waste water and waste residues are produced in the production process. With people's awareness of environmental protection This method will be eliminated; although the co-oxidation method overcomes the shortcomings of the chlorohydrin method with a large amount of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/12C07D303/04
CPCY02P20/584C07D301/12C07D303/04
Inventor 汤广斌刘灏郑强徐向前李新丽温贻强武春阳
Owner HENAN JUNHUA DEV
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