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A recovery device and method for carbon disulfide in the production process of xanthate

A production process, technology of carbon disulfide, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., can solve problems such as impossible economic benefit of carbon disulfide oxidative decomposition, failure to meet carbon disulfide emission standards, large amount of sodium hypochlorite used as a working medium, etc., to achieve Significant energy saving effect, simple solvent follow-up treatment, and high recovery rate

Active Publication Date: 2018-06-29
SHAANXI HUAGUANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Yet for alcohol: sodium hydroxide (or potassium hydroxide): carbon disulfide=1:(0.8~1):(2~8) (molar ratio) process material ratio, on the one hand working medium sodium hypochlorite consumption is big and cannot repeat On the other hand, it is impossible to oxidize and decompose carbon disulfide from the aspect of economic benefit analysis; the removal efficiency of carbon disulfide by using this method is 70% to 93%, which cannot meet the emission standard of carbon disulfide

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  • A recovery device and method for carbon disulfide in the production process of xanthate

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Embodiment 1

[0045] Such as figure 1 As shown, the recovery device of carbon disulfide in the xanthate production process of the present embodiment comprises a deduster 1, a primary condenser 2, a primary cryocooler 3, a secondary condenser 5, a secondary cryocooler 6 and an absorber connected successively. Tower 7;

[0046] The lower part of the dust collector 1 is provided with an air inlet and a dust outlet, and the upper part of the dust collector 1 is provided with an exhaust port. The primary condenser 2, primary cryocooler 3, and secondary condenser 5 are and the bottom of the secondary cryocooler 6 are all provided with an air inlet, a liquid outlet and a refrigerant inlet, and the primary condenser 2, the primary cryocooler 3, the secondary condenser 5 and the secondary cryocooler 6 The upper part of the absorption tower 7 is provided with an exhaust port and a refrigerant outlet, the lower part of the absorption tower 7 is provided with an air inlet and a liquid discharge port, ...

Embodiment 2

[0056] to combine figure 1 , the present embodiment reclaims the method for carbon disulfide from the gas that produces in the xanthate production process, comprises the following steps:

[0057] Step 1. Dust removal: The gas generated during the xanthate production process is passed into the dust collector 1 through the air inlet of the dust collector 1 for dust removal treatment, so that the dust in the gas settles and gathers at the bottom of the dust collector 1, and finally is discharged The dust port is discharged into the dust collection tank 12, and the gas after dust removal is discharged from the exhaust port of the dust collector 1, and enters the next step of the first-stage condensation process;

[0058] In order to improve the dust removal efficiency, in this embodiment, the vacuum pump 4 is preferably used to evacuate the dust collector 1 to a vacuum degree of -0.08MPa, and the heater 10 is preferably used to heat the dust collector 1 so that the internal temper...

Embodiment 3

[0076] to combine figure 1, the present embodiment reclaims the method for carbon disulfide from the gas that produces in the xanthate production process, comprises the following steps:

[0077] Step 1. Dust removal: The gas generated during the xanthate production process is passed into the dust collector 1 through the air inlet of the dust collector 1 for dust removal treatment, so that the dust in the gas settles and gathers at the bottom of the dust collector 1, and finally is discharged The dust port is discharged into the dust collection tank 12, and the gas after dust removal is discharged from the exhaust port and enters the next step of the first-level condensation process;

[0078] In order to improve the dust removal efficiency, in this embodiment, the vacuum pump 4 is preferably used to evacuate the dust collector 1 to a vacuum degree of -0.07MPa, and the heater 10 is preferably used to heat the dust collector 1 so that the internal temperature of the dust collecto...

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Abstract

The invention provides a recovery device for carbon disulfide in the production process of xanthate, comprising a deduster, a primary condenser, a primary cryogenic cooler, a secondary condenser, a secondary cryogenic cooler and an absorption tower connected in sequence, the The primary condenser and the secondary condenser are all communicated with the first refrigerator, the primary cryocooler and the secondary cryocooler are all connected with the second refrigerator, the absorption tower is filled with fillers, and the absorption A sprinkler head is also arranged in the tower. The present invention also provides a method for recovering carbon disulfide from the gas generated in the xanthate production process by using the device, comprising the following steps: 1. dust removal; 2. primary condensation; 3. primary cryogenic cooling; 4. secondary Condensation; fifth, secondary cryogenic cooling; sixth, collection to obtain a water-containing carbon disulfide recovery liquid. The comprehensive recovery rate of the carbon disulfide recovered and treated by the invention is over 99.0%, and the tail gas is discharged up to the standard, thereby reducing the pollution to the environment and improving the working environment.

Description

technical field [0001] The invention belongs to the technical field of comprehensive recovery of raw materials in the production process of beneficiation aids, and in particular relates to a recovery device and method for carbon disulfide in the production process of xanthate. Background technique [0002] Xanthate is xanthate, the scientific name is hydrocarbyl dithiocarbonate, and the chemical formula is ROCSSNa (or ROCSSK). It is a yellow powdery solid, easy to absorb moisture, alkaline, highly toxic, and pungent. Odor, with the properties of surfactants, is widely used in medicine, agriculture, mining and other fields. [0003] The synthesis of xanthate is an organic reaction process, and its raw materials are alcohols, carbon disulfide and sodium hydroxide (or potassium hydroxide), and the reaction formula is: ROH+NaOH+CS 2 →ROCSSNa+H 2 O+Q, or ROH+KOH+CS 2 →ROCSSK+H 2 O+Q. At present, domestic mainstream xanthate manufacturers adopt the kneading method, and the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D45/02B01D53/00B01D53/04
Inventor 孙胜奇冯卫国宋江吴庆伟刘卫峰刘明亮张金磊任博
Owner SHAANXI HUAGUANG IND
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