Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing sulfolane by hydrogenation of sulfolene

A technology for preparing sulfolane and hydrogen, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as affecting costs, and achieve the effects of industrialization, speeding up the reaction rate, and easy separation

Inactive Publication Date: 2006-03-22
NANKAI UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the production cost, the skeleton nickel accounts for a large proportion, which seriously affects the cost of the product - sulfolane

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing sulfolane by hydrogenation of sulfolene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve 30g of sulfolene in 60g of tetrahydrofuran and 60g of water respectively, transfer them to a 250ml autoclave, add 1.5g of skeleton nickel catalyst, raise the temperature to 50°C, under the condition that the stirring speed is 400rpm and the hydrogen pressure is 3.0M Pa Under reaction for 2.5h, the product was analyzed by gas chromatography. It can be seen from Table 1 that the hydrogenation reaction of sulfolene with tetrahydrofuran as a solvent has a higher conversion rate.

Embodiment 2

[0022] Change the amount of catalyst and the reaction speed, add 0.7g skeleton nickel catalyst, the stirring speed is 200rpm, other operations are as in Example 1. It can be seen from Table 1 that at low rotational speeds, using tetrahydrofuran as a solvent, the hydrogenation reaction of sulfolene can still achieve a relatively high conversion rate. This is very beneficial to industrialization.

Embodiment 3

[0024] Change the amount of catalyst and the amount of solvent added, add 0.7g skeleton nickel catalyst, add 30g solvent, other operations are as in Example 1. It can be seen from Table 1 that the hydrogenation reaction of sulfolene still maintains a high conversion rate under the situation that the catalyst consumption of tetrahydrofuran is greatly reduced. This shows that using tetrahydrofuran as a solvent can greatly reduce the amount of framework nickel, thereby reducing production costs and reducing environmental pollutant emissions.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a process for preparing sulfolane by sulfolene hydrogenation wherein sulfolene is dissolved into solvent with the presence of catalyst for low-temperature catalytic hydrogenation, the process comprses the steps of, using tetrahydrofuran or mixed solvent with tetrahydrofuran as the main body, at 45-55 deg.C, agitating at the speed of 200-400 mps, continuously supplying hydrogen gas, reacting 2-3.5h under the pressure of 3.0 MPa, subjecting the product yield to constant pressure distillation or constant pressure rectification, recovering tetrahydrofuran, the catalyst / sulfolene charging amount is 2-10% by mass ratio. The invention can be applied to sustain high activity for the catalyst, accelerate reaction rate, and facilitate separation of solvent and sulfolane.

Description

technical field [0001] The invention belongs to the improvement of the technology for preparing sulfolane by hydrogenation of sulfolane. Specifically, it is a method for preparing sulfolane by hydrogenation of sulfolane. Background technique [0002] Sulfolane is a multifunctional solvent with excellent performance developed following glycol solvents. Used in the extraction process, it has the advantages of high selectivity, small solvent circulation, less loss, high recovery rate of aromatics and heavy aromatics, low water and electricity consumption, and easy separation of solvents and aromatics. Therefore, sulfolane has become the commonly used aromatic hydrocarbon extraction solvent in the world today. In addition, it can also be used as a purifying agent for natural gas, synthetic raw material gas and refinery gas; polymer spinning solvent, desulfurization solvent and plastic, rubber solvent; not only that, it can also be used in textile, printing and dyeing industrie...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C317/12C07C315/04
Inventor 李伟张明慧吴志杰陶克毅
Owner NANKAI UNIV