CN216837758U - Device for improving separation and extraction of sulphone salt - Google Patents
Device for improving separation and extraction of sulphone salt Download PDFInfo
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- CN216837758U CN216837758U CN202122933012.8U CN202122933012U CN216837758U CN 216837758 U CN216837758 U CN 216837758U CN 202122933012 U CN202122933012 U CN 202122933012U CN 216837758 U CN216837758 U CN 216837758U
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- sulfone
- mother liquor
- dimethyl sulfone
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Abstract
The utility model discloses a device for improving separation and extraction of sulfone salt. The mother liquor tank is connected with the feed inlet of the crystallization kettle through a mother liquor feeding pump. The device is adopted to extract the dimethyl sulfone by taking nitrate solution (dimethyl sulfoxide, dimethyl sulfone, sodium nitrate, sodium nitrite and water) as a raw material through reduced pressure distillation, brine condensation crystallization and centrifugal filtration; the device for producing the dimethyl sulfone can realize multistage extraction of the dimethyl sulfone, improve the recovery rate of the dimethyl sulfone, carry out secondary recovery by recovering the centrifugal mother liquor, increase the recovery rate of the dimethyl sulfone and improve the production benefit.
Description
Technical Field
The utility model belongs to the field of production and preparation of dimethyl sulfone, and particularly relates to a separation and extraction device for improving sulfone salt.
Background
Dimethyl sulfone is a white needle crystal with special odor, and is mainly used as a high-temperature solvent for inorganic and organic substances; organic synthesis raw materials; food additive and health product raw material, and can also be used as gas chromatography stationary liquid (maximum use temperature of 30 deg.C, solvent is acetone) and analytical reagent. High boiling point solvent, polar solvent, selective solvent for extractive distillation, electroplating bath solvent, ink and adhesive solvent.
MSM is a newly discovered nutrient substance for human body, has therapeutic value and health care function for human diseases, is a necessary medicine for human survival and health guarantee, is thus regarded by attention of developed countries and is widely applied and sold abroad. The application research of MSM in China is not yet developed, so that the export of the product department is large in population of China, and the MSM is produced and exported in large countries, so that sufficient raw materials are provided for MSM production. Therefore, provides superior conditions for the production and application development of MSM. MSM is sold at a price of about 5 ten thousand yuan per ton in China, and is sold as a health care medicine in 60-70 dollars per kilogram in international markets. Therefore, the MSM is a high and new technology product and a fine chemical product with high added value. The product is new, has great market potential and outstanding benefit, can export earnings and has wide production, application and development prospects.
Disclosure of Invention
The utility model provides a separation and extraction device for improving sulfone salt, which adopts nitrate solution as a raw material and extracts dimethyl sulfone through reduced pressure distillation, brine condensation crystallization and centrifugal filtration. Through the device, the dimethyl sulfone of the sulfone salt in the production device is further recovered, the yield of the dimethyl sulfone is improved, and the production benefit is increased.
A process and a device for improving the separation and extraction of sulfone salt at least comprise the following equipment: evaporating kettle, crystallization kettle, centrifuge, mother liquor groove, waste salt groove, machine pump, and each equipment is connected as follows:
the bottom discharge port of the evaporation kettle is connected with a waste salt tank through a pipeline, the waste salt tank is connected with the feed inlet of the crystallization kettle through a sulfone salt feeding pump, the discharge port of the crystallization kettle is connected with a centrifuge through a pipeline, and the waste liquid outlet of the centrifuge is connected with a mother liquid tank through a pipeline.
The mother liquor tank is connected with the feed inlet of the crystallization kettle through a mother liquor feeding pump.
The mother liquid tank is also connected with the waste salt tank.
For more complete recovery of dimethyl sulfone, the raw material of the process is nitrate solution, and the process comprises the following processes:
and (3) distillation in an evaporation kettle: the nitrate solution enters a nitrate evaporation kettle, the temperature in the kettle is controlled by controlling the steam flow in a shell layer, the concentration of the nitrate solution is compressed, dimethyl sulfoxide is vaporized and separated, and the proportion of the materials in the sulfone salt solution in the kettle is controlled to be 2-3 by sulfoxide-containing wastewater in a sulfoxide device.
Condensation of a crystallization kettle: and the sulfone salt solution extracted from the evaporation kettle enters the crystallization kettle through a waste salt tank feeding pump, the temperature in the kettle is adjusted by controlling the flow rate of the salt water in the shell layer, and the dimethyl sulfone in the sulfone salt solution is crystallized and separated out into crystals at the temperature.
And (3) centrifugal extraction: and (3) allowing the sulfone salt solution extracted from the crystallization kettle to enter a centrifuge, controlling the blanking speed by operating a feed valve, filtering by the centrifuge, and directly entering a centrifugal mother liquor tank, wherein the filtered solid is dimethyl sulfoxide and the liquid is a desulfonated nitrate solution.
Secondary extraction: the centrifugal mother liquor enters the crystallization kettle through a mother liquor tank feeding pump, and is condensed and crystallized, and then dimethyl sulfone is centrifugally extracted through a flat centrifuge.
Drawings
FIG. 1 is a simplified block diagram of the apparatus employed in the process of the present invention.
1: evaporating the kettle; 2: a waste salt tank; 3: a crystallization kettle; 4: a mother liquor tank; 5: a waste salt tank feeding pump; 6: a mother liquor feeding pump; 7: a centrifugal machine.
Detailed Description
The utility model is further described with reference to the following figures and examples, but the scope of the patent claims is not limited to the examples.
Example 1
The utility model provides an improve sulfone salt separation extraction element, 1 bottom discharge mouth of evaporation kettle passes through the pipeline and is connected with waste salt groove 2, and waste salt groove 2 passes through sulfone salt charge pump 5 and is connected with 3 feed inlets of crystallization kettle, and 3 discharge gates of crystallization kettle pass through the pipeline and are connected with centrifuge 7, and 7 waste liquid exports of centrifuge pass through pipe connection mother liquor groove 4.
The mother liquor tank 4 is connected with a feed inlet of the crystallization kettle 3 through a mother liquor feeding pump 6.
The mother liquor tank 4 is also connected with the waste salt tank 2.
Example 2
The device for separating and extracting the salt of sulfone for recovering dimethyl sulfone, which is described in the embodiment 1, is used for recovering dimethyl sulfone, and the process adopts a nitrate solution as a raw material and comprises the following process steps:
and (3) distillation in an evaporation kettle: nitrate solution (nitrate solution comprises 1% of dimethyl sulfoxide, 90% of dimethyl sulfone, 5% of sodium nitrate, 2% of sodium nitrite and the balance of water) with the volume of 10m3And h, feeding the mixture into a nitrate evaporation kettle, controlling the temperature in the kettle to 157 ℃ by controlling the steam flow in a shell layer, compressing the concentration of the nitrate solution and vaporizing and separating the dimethyl sulfoxide, and controlling the specific gravity of the material to 2.6 by the sulfone salt solution in the kettle through sulfoxide-containing wastewater in a sulfoxide device.
And (3) condensation of a crystallization kettle: and the sulfone salt solution extracted from the evaporation kettle enters the crystallization kettle through a waste salt tank feeding pump, the temperature in the kettle is adjusted to 10-12 ℃ by controlling the flow rate of the salt water in the shell layer, and the temperature enables the dimethyl sulfone in the sulfone salt solution to crystallize and separate out crystals.
And (3) centrifugal extraction: and (3) allowing the sulfone salt solution extracted from the crystallization kettle to enter a centrifugal machine, filtering by the centrifugal machine, wherein the filtered solid is dimethyl sulfoxide, and the liquid is a desulfonated nitrate solution and directly enters a centrifugal mother liquid tank.
Secondary extraction: the centrifugal mother liquor enters a crystallization kettle through a mother liquor tank feeding pump, and is condensed and crystallized, and then dimethyl sulfone is centrifugally extracted through a flat centrifuge again, the product purity is 99.95%, and the recovery rate can reach 98% or above.
Claims (3)
1. The utility model provides an improve sulfone salt separation extraction element, its characterized in that, evaporation kettle (1) bottom discharge mouth passes through the pipeline and is connected with waste salt groove (2), and waste salt groove (2) are connected with crystallization kettle (3) feed inlet through sulfone salt charge pump (5), and crystallization kettle (3) discharge gate passes through the pipeline and is connected with centrifuge (7), and centrifuge (7) waste liquid export passes through pipe connection mother liquor groove (4).
2. The device for separating and extracting sulfone salt as recited in claim 1, wherein the mother liquor tank (4) is connected to the feed inlet of the crystallization kettle (3) through a mother liquor feeding pump (6).
3. The apparatus for separating and extracting sulfone salt as recited in claim 1, wherein the mother liquor tank (4) is further connected to the waste salt tank (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122933012.8U CN216837758U (en) | 2021-11-26 | 2021-11-26 | Device for improving separation and extraction of sulphone salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122933012.8U CN216837758U (en) | 2021-11-26 | 2021-11-26 | Device for improving separation and extraction of sulphone salt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216837758U true CN216837758U (en) | 2022-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122933012.8U Active CN216837758U (en) | 2021-11-26 | 2021-11-26 | Device for improving separation and extraction of sulphone salt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216837758U (en) |
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2021
- 2021-11-26 CN CN202122933012.8U patent/CN216837758U/en active Active
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