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Preparation of an odorless amido dithiocarbonate compound and its application in flotation

An amido dithiocarbonate compound and the technology of amido dithiocarbonate, which are applied in the field of odorless xanthate and its preparation, can solve the problems of environmental pollution in xanthate production plants and mineral processing plants, and achieve The effect of shortening the production cycle, high product yield and mild reaction conditions

Active Publication Date: 2021-11-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, conventional xanthate molecules have a pungent odor and cause serious environmental pollution to xanthate production plants and mineral processing plants. The industry urgently needs new xanthate agents that are odorless and have good flotation performance

Method used

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  • Preparation of an odorless amido dithiocarbonate compound and its application in flotation
  • Preparation of an odorless amido dithiocarbonate compound and its application in flotation
  • Preparation of an odorless amido dithiocarbonate compound and its application in flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1: O-(2-benzamidoethyl)potassium dithiocarbonate preparation of

[0061] Add 17.21 parts of N-hydroxyethylbenzamide and 9.43 parts of distilled water into a three-necked flask, stir to dissolve the alcohol, then add 7.99 parts of carbon disulfide, and add a total of 6.60 parts of flake potassium hydroxide (85 %), after all was added, the stirring was continued for 30 minutes below 20°C, and then the temperature was raised to 30°C for 2.5h. 7.12 parts of solid xanthate with a purity of 98.30% and 34.11 parts of liquid xanthate with a purity of 59.2% were obtained. The total yield is 97.5%.

[0062] Note: The solid or liquid state of the product is caused by the amount of water content. When the water content is large, the product is a liquid aqueous solution; when the water content is slightly small, some products crystallize and can be separated by filtration to obtain solid products and liquid products; when the water content is further reduced, The xant...

Embodiment 2

[0063] Embodiment 2: Mother liquor circulation method prepares O-(2-benzamidoethyl) potassium dithiocarbonate

[0064] The first cycle: add 34.11 parts of liquid xanthate obtained in Example 1 into the reaction vessel, and simultaneously add 17.21 parts of N-hydroxyethylbenzamide, stir to dissolve the alcohol, then add 7.99 parts of carbon disulfide, and add in three batches 6. 60 parts (85%) of KOH in flake form. After the addition was complete, the mixture was stirred at a temperature below 20°C for 30 minutes, and then the temperature was raised to 30°C for 2.5 hours. 24.45 parts of solid xanthate with a purity of 96.00% and 41.46 parts of liquid xanthate with a purity of 55.8% were obtained, with a total yield of 94.7%.

[0065] The second circulation: 41.46 parts of liquid xanthates obtained in the previous step are added in the reaction vessel, then add 0.56 parts of distilled water and 17.21 parts of N-hydroxyethyl benzamide, stir to make it dissolve, then add 7.99 par...

Embodiment 3

[0067] Embodiment 3: O-(2-acetamidoethyl)potassium dithiocarbonate preparation of

[0068] Add 10.74 parts of N-hydroxyethylacetamide and 15.45 parts of distilled water into a three-necked flask, then add 7.99 parts of carbon disulfide, and add a total of 6.60 parts of flaky potassium hydroxide (85%) in three batches below 20°C. , Stirring was continued below 20°C for 30 minutes, and then the temperature was raised to 30°C for 2.5h. 40.76 parts of liquid xanthate with a purity of 50.58% were obtained, and the yield was 94.86%.

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Abstract

The invention belongs to the field of flotation, and in particular relates to the preparation of an odorless amidodithiocarbonate compound and its application in flotation. The collector of the present invention, based on the intramolecular coordination of the amide group and the xanthate group functional group, can unexpectedly eliminate the xanthate smell, can eliminate the peculiar smell of the xanthate from the source, and has good stability. It will not decompose and release xanthate odor; not only that, but also can improve the sorting performance of the target ore based on the intramolecular synergy of the chemical structure.

Description

technical field [0001] The invention belongs to the field of mineral collectors, and relates to an odorless xanthate and its preparation method and application. Background technique [0002] In the non-ferrous metal industry, xanthate has been the most widely used sulfide ore since 1925 when Keller discovered that xanthate (the structural formula is ROCSSNa, and the scientific name is xanthate or hydrocarbyl dithiocarbonate) can be used as a sulfide ore collector. Flotation collectors. At present, my country's annual output of xanthate has reached more than 200,000 tons, and the annual export volume is about 80,000 tons, accounting for more than 70% of the world's total xanthate output. Because xanthate has a typical pungent odor of organic thiosalts, it causes serious odorous environmental pollution during its production and use. Even a small amount of xanthate remaining in the flotation wastewater will cause the surrounding air to have a peculiar smell . [0003] At pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/012B03D101/02B03D103/02
CPCB03D1/012B03D2201/02B03D2203/02
Inventor 钟宏林奇阳马鑫张湘予王帅
Owner CENT SOUTH UNIV
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