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Production method of 3-methyl sulfolane

A technology of methyl sulfolane and a production method, applied in the field of organic solvents, can solve the problems such as the failure of commercialization of 3-methyl sulfolane, and achieve the effects of reducing isoprene self-polymerization and reducing generation

Active Publication Date: 2010-11-03
辽宁光华化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 3-Methylsulfolane is used as an organic solvent for aromatics extraction, which can improve the selectivity of heavy aromatics extraction, but at present, 3-methylsulfolane has not been commercialized at home and abroad

Method used

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  • Production method of 3-methyl sulfolane
  • Production method of 3-methyl sulfolane
  • Production method of 3-methyl sulfolane

Examples

Experimental program
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Effect test

Embodiment 1

[0013] First drop into 0.8 grams of polymerization inhibitor hydroquinone, then add 230 grams of liquid sulfur dioxide and 204 grams of isoprene successively, heat while stirring, stop heating when the temperature rises to 80 ° C, because the reaction temperature of the material will continue to rise, At this time, water was used to cool it down, and the temperature was controlled at 90°C-100°C (at this time, the pressure in the reactor was 2.5-3.0Mpa), and when the temperature rose slowly and did not cool down without water and did not heat up, it was stirred for another 20 minutes to obtain crude Sulphone, the content of sulphone is detected by chemical method (bromine value determination method), the yield of sulphone is 82.3%; add water equal to the weight of the crude sulphone for dilution, filter out the flocculent precipitate and then transfer it to the hydrogenation reactor At the same time, add 17.4 grams of Raney nickel catalyst, after stirring, pass high-purity hydro...

Embodiment 2

[0015] First drop into 0.8 grams of polymerization inhibitor hydroquinone, then add 230 grams of liquid sulfur dioxide and 204 grams of isoprene successively, heat while stirring, stop heating when the temperature rises to 80 ° C, because the reaction temperature of the material will continue to rise, At this time, water was used to cool it down, and the temperature was controlled at 90°C-100°C (at this time, the pressure in the reactor was 2.5-3.0Mpa), and when the temperature rose slowly and did not cool down without water and did not heat up, it was stirred for another 20 minutes to obtain crude sulfene, the yield of sulfone is 82.5%; add water equal to the weight of crude sulfone to dilute, filter out the flocculent precipitate and then move it into the hydrogenation reactor, add 30.5 grams of Raney nickel catalyst at the same time, stir and then Put high-purity hydrogen into the reaction kettle for hydrogenation reaction. The hydrogen pressure is generally 2.0Mpa, and the ...

Embodiment 3

[0017] First drop into 0.8 grams of polymerization inhibitor hydroquinone, then add 230 grams of liquid sulfur dioxide and 204 grams of isoprene successively, heat while stirring, stop heating when the temperature rises to 80 ° C, because the reaction temperature of the material will continue to rise, At this time, water was used to cool it down, and the temperature was controlled at 90°C-100°C (at this time, the pressure in the reactor was 2.5-3.0Mpa), and when the temperature rose slowly and did not cool down without water and did not heat up, it was stirred for another 20 minutes to obtain crude sulfone, the yield of sulfone is 82.6%; add water equal to the weight of crude sulfone to dilute, filter out the flocculent precipitate and then move it into the hydrogenation reactor, add 43.4 grams of Raney nickel catalyst at the same time, stir and then Put high-purity hydrogen into the reaction kettle for hydrogenation reaction. The hydrogen pressure is generally 2.0Mpa, and the ...

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Abstract

The invention discloses a production method of 3-methyl sulfolane, relating to an organic solvent capable of being used for aromatic hydrocarbon extraction and mainly aiming to solve the problem that the commercialization of the 3-methyl sulfolane is not realized at home and abroad at present. The production method comprises the steps of: putting a polymerization inhibitor hydroquinone into a combination reaction kettle in the presence of nitrogen protection, then sequentially adding sulfur dioxide liquid and isoprene, heating while stirring, stopping heating when the temperature raises to 80DEG C, cooling by using water, controlling the temperature to be within 90-100 DEG C, continuing stirring for 20 minutes when stopping heating so as to obtain crude alkene, adding water for diluting, filtering flocculent precipitates and then immigrating into a hydrogenation reaction kettle, simultaneously adding a Raney nickel catalyst, introducing high-purity hydrogen into the reaction kettle for hydrogenation reaction, controlling the temperature to be below 70 DEG C, stopping water cooling and heating to terminate the reaction when the hydrogen supply pressure is 3.0 MPa, and filtering, dehydrating and rectifying a product.

Description

Technical field: [0001] The invention relates to an organic solvent which can be used for extraction of aromatic hydrocarbons. Background technique: [0002] 3-Methylsulfolane is used as an organic solvent for the extraction of aromatics, which can improve the selectivity of the extraction of heavy aromatics. However, 3-methylsulfolane has not been commercialized at home and abroad. Invention content: [0003] The technical problem to be solved by the present invention is to provide a production method of 3-methyl sulfolane. [0004] The purpose of the present invention is achieved like this: earlier with stirring, heating, the stainless steel compound reaction kettle that the pressure of cooling facility is 10Mpa cleans up, dry, through nitrogen replacement, drop into polymerization inhibitor hydroquinone under the condition of nitrogen protection , the weight of hydroquinone is 0.18%-0.27% of the total amount of reaction materials, then add liquid sulfur dioxide and iso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D333/48
Inventor 佟赢
Owner 辽宁光华化工有限公司
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