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Epoxidation reaction and separation system and method by means of cumene process

A technology of epoxidation reaction and separation method, applied in organic chemistry and other directions, can solve problems such as incomplete process flow

Inactive Publication Date: 2021-05-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention only discloses the technology of returning unreacted propylene to the epoxidation reactor for recycling by using the process flow of high and low pressure propylene recovery tower, without the process of separation and purification of reaction products, the process flow is incomplete, and the production scale is only 10 10,000 tons / year, the separation and recovery rate of PO products is only 99.9wt%

Method used

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  • Epoxidation reaction and separation system and method by means of cumene process
  • Epoxidation reaction and separation system and method by means of cumene process
  • Epoxidation reaction and separation system and method by means of cumene process

Examples

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Effect test

Embodiment 1

[0025] Be 50,000 tons / year CHPPO industrial plant as example with the nominal capacity, adopt the cumene method epoxidation reaction and separation system and method of the present invention, as figure 1 As shown, the process flow of this embodiment is as follows: propylene A1 from outside the system and cumene hydroperoxide B1 from outside the system are mixed and then enter the first reactor 01, and after the first epoxidation reaction, the outflowed second The first reaction product P1 enters the second reactor 02, and after the second epoxidation reaction, the second reaction product P2 that flows out enters the gas-liquid separation tower 03, and is separated by rectification, and the unreacted propylene A2 flows out from the top of the tower. The kettle flows out the reaction product P3. The unreacted propylene A2 is pressurized by the compressor 04, and the recycled propylene A3 is mixed with the propylene A1 and cumene hydroperoxide B1 and returned to the first reactor...

Embodiment 2

[0029] Same as Example 1, only the nominal capacity and process operation parameters are changed, the nominal capacity is changed to 100,000 tons / year CHPPO industrial device, the process operation parameters of this embodiment are modified as follows: the number of first reactors M and the number of second reactors N For M=N=8 units, the operating temperature of the first reactor 01 is 160° C., the operating pressure is 12.0 MPaA, and the molar ratio of the feed amount of propylene A1 and circulating propylene A3 to the feed amount of cumene hydroperoxide B1 is 40:1, the combined propylene concentration of propylene A1 and recycled propylene A3 is 98wt%, the concentration of cumene hydroperoxide in cumene hydroperoxide B1 is 80wt%, and the weight space velocity of cumene hydroperoxide is 6.0h -1 ; The operating temperature of the second reactor 02 is 160° C., and the operating pressure is 11.6 MPaA. The operating pressure of the gas-liquid separation tower 03 is 0.75MPaA, th...

Embodiment 3

[0032]Same as Example 1, only the nominal capacity and process operation parameters are changed, the nominal capacity is changed to 100,000 tons / year CHPPO industrial device, the process operation parameters of this embodiment are modified as follows: the number of first reactors M and the number of second reactors N For M=N=3 units, the operating temperature of the first reactor 01 is 80°C, the operating pressure is 2.0MPaA, the mol ratio of the feed amount of propylene A1 and circulating propylene A3 to the feed amount of cumene hydroperoxide B1 is 4:1, the combined propylene concentration of propylene A1 and recycled propylene A3 is 88wt%, the concentration of cumene hydroperoxide in cumene hydroperoxide B1 is 10wt%, and the weight space velocity of cumene hydroperoxide is 0.4h -1 The operating temperature of the second reactor 02 is 80°C and the operating pressure is 1.6MPaA; the operating pressure of the gas-liquid separation tower 03 is 0.30MPaA, the operating temperatur...

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Abstract

The invention discloses an epoxidation reaction and separation system and method by means of a cumene process. The reaction and separation system comprises a first reactor, a second reactor, a gas-liquid separation tower, a compressor, a crude PO tower, an alkaline washing tower, a heavy component removal tower, a light component removal tower, an extraction tower, an oil-water separation tank, a flash tower and a dehydration tower. According to the reaction and separation method, the activity of a catalyst is gradually improved from the logic first position to the logic last position by switching series reactors, the PO reaction yield is improved to 97.70-98.20 wt%, low-pressure steam is injected into a separation tower to reduce the kettle temperature and reduce the loss of cumene, the kettle temperature of the crude PO tower is reduced to 80-110 DEG C, and the outlet cumene is reduced to 320-326 mg / kg; and the PO separation recovery rate is increased to 99.95 to 99.97 wt%.

Description

technical field [0001] The present invention relates to a kind of epoxidation reaction and separation system and reaction and separation method, especially relate to a kind of cumene oxidation CHPPO method propylene and hydroperoxide cumene epoxidation reaction generate propylene oxide and carry out reaction product Separation systems and methods. Background technique [0002] As an important basic organic chemical raw material, propylene oxide has high surface tension and high reactivity. In industry, it is mainly used to prepare polyether polyol, propylene glycol, alcohol amine, polyurethane and surfactant, etc. Its derivatives are widely used in chemical industry, petrochemical industry, energy chemical industry, daily chemical industry, medicine, pesticide, cosmetics, food, tobacco, Construction, home appliances, automobiles, textiles and other industries, with the continuous development of the national economy, the annual growth rate of demand for propylene oxide has a...

Claims

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Application Information

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IPC IPC(8): C07D301/32C07D303/04C07D301/19
CPCC07D301/32C07D303/04C07D301/19
Inventor 何琨杨建平王红白玫孙丽丽
Owner CHINA PETROLEUM & CHEM CORP