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Preparation method of xanthate collecting agent

A technology of xanthates and xanthates, which is applied in the field of preparation of xanthate collectors, can solve problems such as difficult separation of xanthates, unfavorable dispersion or dissolution, and strong pungent odor. Achieve outstanding environmental benefits, no irritating odor, and weak water solubility

Pending Publication Date: 2022-05-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, solvents such as carbon disulfide, raw material alcohol, benzene, toluene, xylene, ethylbenzene, ethylene dichloride, acetone, sherwood oil (hydrocarbon solvent), water, gasoline, kerosene, tetrahydrofuran, or boiling point High, difficult to separate from xanthate (raw material alcohol, benzene, toluene, xylene, ethylbenzene, gasoline, kerosene), or side reactions (carbon disulfide, water, tetrahydrofuran), or participate in the reaction during the reaction (dichloro ethane, acetone), or unfavorable for alkali dispersion or dissolution, low reaction efficiency (benzene, toluene, xylene, ethylbenzene, gasoline, kerosene, sherwood oil), although the xanthate purity and yield of solvent method synthesis It is slightly higher than that of the kneading method, but there is still a strong pungent smell of xanthate products, and there is still room for improvement in purity and yield

Method used

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  • Preparation method of xanthate collecting agent
  • Preparation method of xanthate collecting agent
  • Preparation method of xanthate collecting agent

Examples

Experimental program
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Effect test

Embodiment 1

[0047] The preparation of embodiment 1 sodium isobutyl xanthate (I)

[0048] Add 43 parts of diethyl ether with a purity of 99% into the reactor, start stirring, add 8.4 parts of granular sodium hydroxide with a purity of 96%, then add 14.97 parts of isobutanol with a purity of 99% dropwise at 0°C to 10°C, and complete the addition After that, react at 10°C for 30 min. Then slowly add 15.69 parts of carbon disulfide dropwise at 5°C to 10°C, after the addition, stir and react at 10°C for 2 hours, and then react at 18°C ​​for 2 hours. After the reaction was completed, the reaction mixture was distilled to remove ether to obtain a product of sodium isobutyl xanthate monohydrate with a purity of 99.5%. The product had a very light smell and no stimulation, and the yield based on isobutanol was 99.6%. The reaction equation of synthetic sodium isobutyl xanthate is as follows:

[0049]

Embodiment 2 10

[0050] The preparation of embodiment 2 sodium dodecyl xanthate

[0051] Change 14.97 parts of 99% isobutanol into 37.26 parts of 99% dodecanol with a purity of 99% in Example 1, change 43 parts of diethyl ether into 64 parts of diethyl ether, and stir and react at 12° C. for 2 hours after adding carbon disulfide. Reaction at 24°C for another 3h. Other conditions were the same as in Example 1, and the sodium dodecyl xanthate product was obtained, which had a very light smell and was non-irritating. The yield based on lauryl alcohol was 99.4%, and the purity was shown in Table 1.

Embodiment 3

[0052] The preparation of embodiment 3 hexyloxyethyl xanthate sodium

[0053] Change 14.97 parts of 99% isobutanol into 29.84 parts of ethylene glycol monohexyl ether with a purity of 98% in Example 1, change 43 parts of diethyl ether into 52 parts of diethyl ether, and stir and react at 12°C after adding carbon disulfide After 2 hours, react at 24°C for another 2h. Other conditions were the same as in Example 1, and the sodium hexyloxyethyl xanthate product was obtained, which had a very light smell and was non-irritating. The yield based on ethylene glycol monohexyl ether was 99.1%, and the purity was shown in Table 1.

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PUM

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Abstract

The invention belongs to the field of preparation of flotation reagents, and particularly relates to a preparation method of a xanthate collector, which comprises the following steps: reacting alkali, organic alcohol and carbon disulfide in linear ether, and separating the linear ether from the reaction mixture after the reaction is completed to obtain xanthate. According to the method disclosed by the invention, the xanthate compound is almost quantitatively prepared. Through desolvation, a high-purity xanthate product is obtained, and the xanthate product is very light in smell and free of strange smell; the method is suitable for preparation of most xanthate and dixanthate compounds, and has outstanding economic and environmental benefits.

Description

technical field [0001] The invention belongs to the field of preparation of flotation agents, in particular to a preparation method of xanthate collectors. Background technique [0002] Xanthate, commonly known as "xanthate", the basic formula is: [0003] [0004] In the formula, R is an alkyl group with a different carbon chain length, an alkoxy group, etc.; Me is generally sodium or potassium. In 1815, Zeise synthesized xanthate for the first time; in 1925, Keller discovered that xanthate could be used as a flotation collector for sulfide minerals. At present, xanthate is still the most widely used sulfide ore flotation collector. [0005] The methods of synthesizing xanthate include "kneading method" and "solvent method". The kneading method is to directly add alcohol and carbon disulfide to the kneader, and then gradually add powdered caustic (sodium hydroxide or potassium hydroxide), and react at 25°C to 35°C to form xanthate. The production process of kneading ...

Claims

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Application Information

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IPC IPC(8): C07C329/14
CPCC07C329/14
Inventor 刘广义卿旭东刘胜
Owner CENT SOUTH UNIV
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