Application of N2O4 as catalyst in dimethyl sulfoxide production

A technology of dimethyl sulfoxide and dinitrogen tetroxide, which is applied in the direction of physical/chemical process catalysts, preparation of organic compounds, organic chemistry, etc., can solve problems such as easy leakage, side reactions, unfavorable clean production, etc., to avoid The effect of the explosion accident

Inactive Publication Date: 2007-01-03
HUBEI XINGFA CHEM GRP CO LTD
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Problems solved by technology

The mixed gas produces a large amount of acid wastewater during the generation process, which is not conducive to clean production, and is highly corrosive to equipment, prone to leakage, and high maintenance costs
On the other hand, the mixed gas is impure, and as a catalyst, it is prone to side reactions in the oxidation reaction of dimethyl sulfoxide, and is not conducive to the safe, continuous and stable oxidation reaction.

Method used

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Examples

Experimental program
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Embodiment Construction

[0006] An application of dinitrogen tetroxide as a catalyst in the production of dimethyl sulfoxide, the liquid dinitrogen tetroxide is pressed into the gasifier at a pressure of 0.2MPa-0.25MPa, and gasified at a temperature of 45°C-65°C , the nitrogen dioxide gas generated after gasification enters the buffer tank, the pressure of the buffer tank is controlled at 0.15MPa-0.2MPa, the flow rate of nitrogen dioxide gas at the outlet of the buffer tank is adjusted, and it directly enters the oxidation reactor in the production of dimethyl sulfoxide as a catalyst use.

[0007] Press the liquid dinitrogen tetroxide in the storage tank into the vaporizer under the pressure of 0.2MPa-0.25MPa, keep the liquid level of the material in the vaporizer, and keep the temperature of the vaporizer at 45°C-65°C, dinitrogen tetroxide Nitrogen dioxide gas is generated after gasification, and then the gasified nitrogen dioxide gas enters the buffer tank, the pressure of the buffer tank is control...

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Abstract

The present invention discloses the application of N2O4 as catalyst in producing dimethyl sulfoxide. Liquid N2O4 is pressurized into a gasifier at the pressure of 0.2-0.25 MPa and gasified at 45-65 deg.c to produce NO2 gas, and the produced NO2 gas is made to enter buffering tank at 0.15-0.2 MPa and further flow from the buffering tank to oxidizing reactor at controlled flow rate for serving as catalyst in producing dimethyl sulfoxide. The present invention has the advantages of no waste produced, stable reaction and no explosion accident.

Description

technical field [0001] The invention relates to the selection of a catalyst for oxidizing dimethyl sulfide to generate dimethyl sulfoxide in the production of dimethyl sulfoxide, especially the application of dinitrogen tetroxide as a catalyst in the production of dimethyl sulfoxide . Background technique [0002] The production of dimethyl sulfoxide mainly uses methanol (or hydrogen sulfide) and carbon disulfide as raw materials to synthesize dimethyl sulfide, and dimethyl sulfide is then oxidized with oxygen under the action of a catalyst to form dimethyl sulfoxide. The existing technology uses the mixed gas of nitrogen dioxide and nitric oxide generated by the direct reaction of sodium nitrite and concentrated sulfuric acid in a reactor as a catalyst for the oxidation reaction of dimethyl sulfoxide. The mixed gas produces a large amount of acid wastewater during the generation process, which is not conducive to clean production, and is highly cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C317/04C07C315/02
Inventor 田云华龙真明陈孝周杨军
Owner HUBEI XINGFA CHEM GRP CO LTD
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