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A method for compressing/condensing and reclaiming sulfur dioxide in the production process of sulfolane

A sulfur dioxide, production process technology, applied in chemical instruments and methods, sulfur compounds, organic chemistry, etc., can solve the problem of reducing the pressure of sulfur dioxide by alkali elution, and achieve the effect of reducing pressure

Active Publication Date: 2019-07-12
SHENYANG POLYTECHNIC UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the fact that the emission concentration of sulfur dioxide in the desulfurization process in the intermittent sulfolane production process cannot be guaranteed to meet the standard at all times, the present invention redesigns the desulfurization process. Through the innovative compression / condensation process, on the one hand, the largest amount of sulfur dioxide, the reactant, can be recovered and the reaction rate can be reduced. At the same time, reduce the pressure of subsequent alkali washing desulfurization to ensure that the concentration of sulfur dioxide in the exhaust gas meets the current emission standards of the atmospheric environment; and for the desulfurization process of the continuous sulfolane production process, a compression / condensation process scheme is also proposed to achieve To achieve the dual purpose of environmental protection and cost reduction

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  • A method for compressing/condensing and reclaiming sulfur dioxide in the production process of sulfolane
  • A method for compressing/condensing and reclaiming sulfur dioxide in the production process of sulfolane
  • A method for compressing/condensing and reclaiming sulfur dioxide in the production process of sulfolane

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Embodiment 1

[0049] For a batch production process, the composition of the raw material liquid entering the reactor is 1070kg of liquid 1,3-butadiene and 1400kg of liquid sulfur dioxide, which enter the reactor together to produce sulfolene and then undergo hydrogenation and rectification to obtain sulfolane products. After the sulfolene reaction is complete, the composition of the exiting material from the reactor is 2290.411kg of sulfolene, 158.064kg of sulfur dioxide remaining in the reaction, 21.4kg of 1,3 butadiene, sulfur dioxide and 1,3 butanediene Alkenes are dissolved in the sulfolene liquid phase. The material pressure out of the reactor is 1.0MPa, and the temperature is 110°C. The composition of the exiting material from the kettle is decompressed step by step. Depressurization step: directly reduce the liquid phase material to 0.4MPa, recover part of sulfur dioxide and 1,3 butadiene through condensation, and then reduce the pressure of the remaining liquid phase material to 0....

Embodiment 2

[0051]For a batch production process, the composition of the raw material liquid entering the reactor is 1070kg of liquid 1,3-butadiene and 1400kg of liquid sulfur dioxide, which enter the reactor together to produce sulfolene and then undergo hydrogenation and rectification to obtain sulfolane products. After the sulfolene reaction is complete, the composition of the exiting material from the reactor is 2290.411kg of sulfolene, 158.064kg of sulfur dioxide remaining in the reaction, 21.4kg of 1,3 butadiene, sulfur dioxide and 1,3 butanediene Alkenes are dissolved in the sulfolene liquid phase. The material pressure out of the reactor is 1.0MPa, and the temperature is 110°C. Step-by-step decompression of the composition of the exiting material, the step of depressurization: directly reduce the liquid phase material to 0.5MPa, recover part of sulfur dioxide and 1,3 butadiene through condensation, and then depressurize the remaining liquid phase material to 0.4MPa, and recover p...

Embodiment 3

[0053] For a batch production process, the composition of the raw material liquid entering the reactor is 1070kg of liquid 1,3-butadiene and 1400kg of liquid sulfur dioxide, which enter the reactor together to produce sulfolene and then undergo hydrogenation and rectification to obtain sulfolane products. After the sulfolene reaction is complete, the composition of the exiting material from the reactor is 2290.411kg of sulfolene, 158.064kg of sulfur dioxide remaining in the reaction, 21.4kg of 1,3 butadiene, sulfur dioxide and 1,3 butanediene Alkenes are dissolved in the sulfolene liquid phase. The material pressure out of the reactor is 1.0MPa, and the temperature is 90°C. Step-by-step depressurization of the composition of the exiting material, the depressurization step: directly reduce the pressure of the liquid phase material to 0.4MPa, recover part of the sulfur dioxide and 1,3 butadiene through condensation, and then reduce the pressure of the remaining liquid phase mate...

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Abstract

The invention relates to a method for recovering sulfur dioxide by compression / condensation in the production process of sulfolane. In the production of sulfolane, the residual pressure of the sulfolane reactor, an intermediate product, is used to reduce the pressure, and the unreacted sulfur dioxide in the production process of sulfolane is recovered in a step-by-step compression and condensation mode. and 1,3 butadiene; no matter for the intermittent production process or the continuous sulfolane production process, it has achieved a good desulfurization effect, reduced the concentration of sulfur dioxide emissions, and met the national environmental protection requirements.

Description

technical field [0001] The invention relates to a method for recovering sulfur dioxide by adopting a compression / condensation process in the production process of sulfolane. Background technique [0002] Sulfolane, as an extraction agent for aromatics extraction, has an important application in the petrochemical industry. At present, there are three methods for synthesizing sulfolane, one is tetrahydrothiophene oxidation method, using potassium permanganate or hydrogen peroxide as the oxidizing agent, the oxidation product is extracted with benzene, and fractionated to obtain nearly 100% sulfolane. The second method is the synthesis of ethylene and sulfur dioxide. The third method is the sulfolene hydrogenation method, that is, the reaction of liquid 1,3 butadiene and sulfur dioxide in the presence of a polymerization inhibitor to generate sulfolene, and then hydrogenation of sulfolene to produce sulfolane. Due to technical and economical reasons, the first two methods hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D333/48C07C11/167C07C7/00C01B17/56
CPCC01B17/56C07C7/005C07D333/48C07C11/167
Inventor 姚辉赵波刘红晶于大伟杨旭鹏王园园
Owner SHENYANG POLYTECHNIC UNIV
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