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A method for reactive desulfurization of hydrogen sulfide and sulfur dioxide

A technology of sulfur dioxide and hydrogen sulfide, applied in chemical instruments and methods, separation methods, sulfur compounds, etc., can solve the problems of harsh reaction conditions, low purity of solid sulfur products, and difficulty in refining, and achieve mild reaction conditions and simple equipment and easy processing. , the effect of low investment

Active Publication Date: 2021-07-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] In order to solve the problems in the prior art that the liquid phase reaction conditions of hydrogen sulfide and sulfur dioxide are harsh, or buffer solutions and catalysts are required, and the resulting solid sulfur product has low purity and difficult refining, the present invention intends to provide a hydrogen sulfide and sulfur dioxide reactive desulfurization system. method, a solution is used in the reaction as the liquid for the reaction of hydrogen sulfide and sulfur dioxide, which can realize the rapid reaction of the two under mild conditions and have a high S removal rate. The purity of sulfur is high, and only needs to be simply separated without refining

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The reaction solution is prepared by using benzylamine and deionized water, the mass fraction of benzylamine in the solution is 30%, and the mixture is uniformly placed in the reactor. SO at room temperature 2 The gas is passed into the reactor with a flow rate of 300mL / min. After the pH value of the solution in the reactor becomes acidic, H 2 S gas, H 2 The flow rate of S gas is 600mL / min, it can be seen that the liquid in the reactor turns yellow quickly, and the time is about 6s, indicating that the H 2 S and SO 2 The reaction time is short. Sodium hydroxide lye is used as the tail gas absorbent to absorb the unreacted impurity gas, and the tail gas is emptied. After completion of the reaction, get the reaction solution in the reactor to filter and reclaim sulfur, dry and weigh, calculate according to material balance, H 2 The conversion rate of S was 92.4%.

Embodiment 2

[0041] The reaction solution was prepared by using benzylamine and deionized water, the mass fraction of benzylamine in the solution was 20%, and the reaction solution was mixed uniformly and placed in the reactor. SO at room temperature 2 The gas is passed into the reactor with a flow rate of 300mL / min. After the pH value of the solution in the reactor becomes acidic, H 2 S gas, H 2 The flow rate of S gas is 600mL / min, it can be seen that the liquid in the reactor turns yellow quickly, and the time is about 6s, indicating that the H 2 S and SO 2 The reaction time is short. Sodium hydroxide lye is used as the tail gas absorbent to absorb the unreacted impurity gas, and the tail gas is emptied. After completion of the reaction, get the reaction solution in the reactor to filter and reclaim sulfur, dry and weigh, calculate according to material balance, H 2 The conversion rate of S was 91.8%.

Embodiment 3

[0043] The reaction solution was prepared by using isopropanolamine and deionized water, the mass fraction of isopropanolamine in the solution was 20%, mixed evenly and placed in the reactor. SO at room temperature 2 The gas is passed into the reactor with a flow rate of 300mL / min. After the pH value of the solution in the reactor becomes acidic, H 2 S gas, H 2 The flow rate of S gas is 600mL / min, it can be seen that the liquid in the reactor turns yellow quickly, and the time is about 5s, indicating that the H 2 S and SO 2 The reaction time is short. Sodium hydroxide lye is used as the tail gas absorbent to absorb the unreacted impurity gas, and the tail gas is emptied. After completion of the reaction, get the reaction solution in the reactor to filter and reclaim sulfur, dry and weigh, calculate according to material balance, H 2 The conversion rate of S was 95.7%.

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Abstract

A method for desulfurization by reaction of hydrogen sulfide and sulfur dioxide. Hydrogen sulfide and sulfur dioxide are reacted in a solution, the solution includes water and at least one organic basic compound soluble in water, and the initial pH value of the solution is ≥7.2. The mass fraction of the organic basic compound in the solution is 0.1% to 30%; in the above method, the selected organic basic compound is a compound with a solubility in water ≥ 0.1g / 100g water, preferably a solubility ≥ 1g / 100g water. The above reaction can be carried out at normal temperature and pressure, and the addition of organic basic compounds makes H 2 S and SO 2 The reaction time is greatly shortened, indicating that the dissolution rates of the two in water tend to be similar, so that the reaction is more likely to occur, and the sulfur product obtained by the reaction is high in purity, only liquid-solid separation is required without refining. The required reaction conditions of the method of the invention are mild, the equipment is simple and easy to process, the investment is low, and the operation is safe.

Description

technical field [0001] The invention relates to a method for reactive desulfurization of hydrogen sulfide and sulfur dioxide, which belongs to the field of industrial production or industrial waste gas purification. Background technique [0002] Due to the development of our country's economy, the demand for crude oil continues to increase, and domestic crude oil is no longer enough to meet national needs, so imported crude oil is continuously being imported into China. From January to December 2016, China imported 381.01 million tons of crude oil, an increase of 13.6% compared with the same period last year. With the increase of my country's imported crude oil year by year, the proportion of high-sulfur crude oil is increasing. For this reason, major oil refining companies have developed a series of high-sulfur crude oil processing technology. During cracking, catalytic cracking and other processing processes, a large amount of H-containing 2 S acid gas and containing SO ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/52B01D53/50C01B17/04
CPCC01B17/0426C01P2006/80
Inventor 方向晨李磊李欣王海波金平齐慧敏王明星
Owner CHINA PETROLEUM & CHEM CORP
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