Process for desulfurization by reacting hydrogen sulfide with sulfur dioxide

A technology of sulfur dioxide and hydrogen sulfide, which is applied in chemical instruments and methods, sulfur preparation/purification, separation methods, etc., can solve the problems of low purity of solid sulfur products, harsh liquid reaction conditions, and difficult refining, and shorten the reaction time. , The equipment is easy to process and the investment is low.

Active Publication Date: 2019-03-29
CHINA PETROLEUM & CHEM CORP +1
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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. In this process, hydrogen sulfide and sulfur dioxide react in the liquid phase system to generate sulfur. The reaction conditions are mild and have a high desulfurization rate. High-purity sulfur can be obtained through simple liquid-solid separation.

Method used

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  • Process for desulfurization by reacting hydrogen sulfide with sulfur dioxide
  • Process for desulfurization by reacting hydrogen sulfide with sulfur dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0045] use figure 1 The hydrogen sulfide and sulfur dioxide reaction desulfurization process of the device shown is as follows:

[0046] Pure SO 2 The gas is passed into the bottom of the reactor 100 through the gas flow meter I11, and the bottom of the reactor 100 is provided with a gas distributor 101, and the aqueous solution of an organic basic compound is installed in the reactor 100 as a reaction solution, SO 2 The gas is dissolved in the reaction solution after passing through the gas distributor 101. An online pH detector 102 is installed on the wall of the reactor 100. When the pH detector 102 shows 6.8, pure H begins to be introduced into the reactor 100. 2S gas is passed into the reactor 100 after passing through the gas flow meter II12, and the liquid in the reactor 100 quickly turns yellow, which shows that the two react immediately to generate sulfur; the product sulfur in the reactor 100 is released from the reactor along with part of the reaction solution The...

Embodiment 2

[0050] use figure 1 The device shown is a process for reactive desulfurization of hydrogen sulfide and sulfur dioxide:

[0051] Except that the organic basic compound solution is a 20% benzylamine solution, other conditions are the same as in Example 1.

[0052] According to the material balance calculation, H 2 The conversion rate of S was 94.1%.

Embodiment 3

[0054] use figure 1 The device shown is a process for reactive desulfurization of hydrogen sulfide and sulfur dioxide:

[0055] In addition to the organic alkaline compound solution is 20% isopropanolamine solution, SO 2 Gas flow rate is 400mL / min, H 2 Except that the flow rate of S gas is 800mL / min, other conditions are the same as embodiment 1.

[0056] According to the material balance calculation, H 2 The conversion rate of S was 97.7%.

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Abstract

Disclosed is a process for desulfurization by reacting hydrogen sulfide with sulfur dioxide. The process includes the following steps: gas containing hydrogen sulfide and gas containing sulfur dioxideare introduced into a reactor, wherein the reactor is filled with a reaction solution, the reaction solution comprises water and at least one organic alkaline compound mutually soluble with water, and the organic alkaline compounds make the pH value of the solution greater than or equal to 7.2; and the hydrogen sulfide reacts with the sulfur dioxide to produce sulfur, the sulfur is removed in thereaction process, the reaction solution is replenished online, and liquid and solid in the reactor are separated after the reaction is completed to obtain the sulfur. The process of the invention utilizes the addition of the organic alkaline compounds in the reaction solution to greatly shorten the reaction time of H2S and SO2 in liquid phase, the reaction response time is less than 15 seconds, and the reaction can be carried out at normal temperature and atmospheric pressure for desulfurization. The high-purity sulfur can be obtained by simply liquid-solid separation without refinement. Theprocess of the invention has the advantages of mild reaction conditions required, simple and easy processing equipment, low investment and safe operation.

Description

technical field [0001] The invention relates to a process 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 Applications(China)
IPC IPC(8): B01D53/52B01D53/50C01B17/05
CPCB01D53/50B01D53/52B01D2258/02B01D2258/0283C01B17/05C01P2006/80
Inventor 李磊李欣王海波金平齐慧敏韩天竹王昊辰
Owner CHINA PETROLEUM & CHEM CORP
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