Process control method of hppo unit reactor

A process control and reactor technology, applied in the production of bulk chemicals, organic chemistry, etc., can solve problems such as poor heat transfer effect, uneven reaction temperature, and difficulty in controlling the temperature in the reactor, so as to achieve selectivity improvement and good technology effect of effect

Active Publication Date: 2019-11-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem of poor heat transfer effect, uneven reaction temperature, and difficult control of the temperature in the reactor in the prior art, and a new process control method for the reactor of the HPPO device is provided

Method used

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  • Process control method of hppo unit reactor
  • Process control method of hppo unit reactor

Examples

Experimental program
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Effect test

Embodiment 1

[0020] like figure 1 As shown, when the process material and the circulating cooling water flow in parallel, the methanol solvent (5), the propylene raw material (6) and the hydrogen peroxide raw material (7) enter the corrugated plate group of the catalytic reactor (1), and under the action of the catalyst, The initial reaction is carried out. The reacted process material (8), together with the propylene raw material (6) and the hydrogen peroxide raw material (7), enter into the corrugated plate group of the catalytic reactor (2), and then undergo an initial reaction under the action of the catalyst. The reacted process material (9) enters outside the corrugated plate group of the catalytic reactor (3), and undergoes a later reaction under the action of the catalyst. The reacted process material (10) enters outside the corrugated plate group of the catalytic reactor (4), and undergoes a later reaction under the action of the catalyst. The reacted propylene oxide product (11...

Embodiment 2

[0026] According to the conditions and steps of Example 1, the production scale is changed to 100,000 tons / year of HPPO industrial production equipment, and the circulating cooling water of the present invention is adopted to be forced to circulate to optimize heat removal and to control the temperature of the circulating cooling water by a thermometer and a regulating valve to evenly Propylene oxide is produced by controlling the reaction temperature. The process parameters of the epoxidation reaction are as follows: the temperatures of the four reactors are respectively 78°C, 65°C, 58°C, and 50°C, the reaction pressure is 2.8MPaG, and the propylene weight space velocity is 3.2 h -1 , the methanol / hydrogen peroxide molar ratio is 8:1, the propylene / hydrogen peroxide molar ratio is 1.4:1, and the TS-1 titanium-silicon molecular sieve catalyst is used, and the titanium-silicon ratio is SiO 2 : TiO 2 =165, the ratio of the flow rate of circulating cooling water for forced circu...

Embodiment 3

[0029] According to the conditions and steps of Example 1, the production scale is changed to 200,000 tons / year HPPO industrial production device, and the circulating cooling water of the present invention is adopted to be forced to circulate to optimize heat removal and to control the temperature of the circulating cooling water by a thermometer and a regulating valve to be uniform. The method of controlling the reaction temperature produces propylene oxide. The process parameters of the epoxidation reaction are as follows: the temperatures of the four reactors are respectively 79°C, 70°C, 59°C, and 50°C, the reaction pressure is 3.2MPaG, and the propylene weight space velocity is 4.6 h -1 , the methanol / hydrogen peroxide molar ratio is 12:1, the propylene / hydrogen peroxide molar ratio is 3.2:1, and the TS-1 titanium-silicon molecular sieve catalyst is used, and the titanium-silicon ratio is SiO 2 : TiO 2 =130, the ratio of the flow rate of circulating cooling water for forc...

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Abstract

The invention relates to a reactor process control method of an HPPO (hydrogen peroxide to propylene oxide) device and mainly solves the problems that a heat transfer effect is poor, the reaction temperature is not uniform and the temperature in a reactor is difficult to control in the prior art. By means of the reactor process control method of the HPPO device, four serially connected corrugated plate reactors are adopted, circular cooling water is forced to circulate to optimize heat removing, and the temperature of the circular cooling water is controlled through a thermometer and an adjusting valve, so that the reaction temperature is uniform. Accordingly, by means of the technical scheme that the total heat transfer coefficient K is increased to 2,400-2,800 w / m<2>k, the service life of a catalyst is prolonged to 4.8-5.0 years and the selectivity of epoxypropane is improved to 97.2%-97.3%, the problems are better solved, and the reactor process control method can be used in the HPPO device.

Description

technical field [0001] The invention relates to a process control method for a reactor of an HPPO device. Background technique [0002] Propylene oxide is a very important organic chemical raw material, which can be used in the production of polyols, polyurethanes, non-ionic surfactants, oil field demulsifiers, pesticide emulsifiers, etc. It is widely used in automobiles, construction, food, tobacco, medicine and cosmetics. and other industries. The invention patent CN 201310683291.4 in the prior art discloses a method for preparing propylene oxide, which discloses that each reactor in which the reaction raw material enters the reactor of the process device contacts and reacts with the catalyst to generate propylene oxide. The product stream from each reactor may selectively enter a subsequent separation section and / or enter at least one of the remaining reactors. After the catalyst in the process unit reactor is deactivated, the reactor can be isolated for catalyst regene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D301/12C07D303/04
CPCC07D301/12C07D303/04Y02P20/52
Inventor 吴德荣张斌孙丽丽叶志一白玫杨建平何琨
Owner CHINA PETROLEUM & CHEM CORP
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