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Method for producing carbon disulfide

A carbon disulfide and compound technology, applied in the field of carbon disulfide preparation, can solve the problems of low gas cost, incomplete pyrolysis, low dry distillation temperature, etc., and achieve the effects of protecting the environment, saving wood, and solving environmental pollution

Inactive Publication Date: 2003-07-23
SHANGHAI BAIJIN CHEM GROUP
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Problems solved by technology

[0005] At present, in some places in my country, taking advantage of the characteristics of local weakly cohesive coal with high volatile content and easy carbonization to produce gas, the raw coal is directly carbonized to produce dry distillation gas without washing and coal blending. The cost of gas produced thus Low, high calorific value, but semi-coke, a by-product of dry distillation after gas production, has become an environmental hazard. Because it has not been washed and blended with coal, and the temperature of dry distillation is low, the pyrolysis is not complete, so this by-product is in the industry. No suitable application found yet
Only a small part is used as fuel in rural areas, and most of them are treated as waste, causing great environmental pollution and wasting a lot of resources

Method used

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  • Method for producing carbon disulfide
  • Method for producing carbon disulfide
  • Method for producing carbon disulfide

Examples

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example 1

[0027] Example 1 Take gas coal dry distillation by-product-semi-coke, (the dry-distillation by-product semi-coke can be directly taken from the by-product of Datong's local vertical carbonization gasifier-carbonization semi-coke) and grind it into powder, and sieve to get 2-10 The physical and chemical parameters of the target semi-coke particles are as follows: bulk density 0.4g / ml; surface area 200m 2 carbon content 95%; moisture 2%; ash 15%; volatile matter 15%; take 100 grams of the above-mentioned semi-coke particles, put them into a laboratory cast iron reaction furnace, heat to 800 ° C, add sulfur liquid, and put them in the reaction tube The temperature was kept at 800-950° C., and after 5 hours, 220 grams of carbon disulfide were obtained. Yield 35.0%.

Embodiment 2

[0028] Example 2 The raw material is the leftover coke powder after crushing coke in a coking plant, and its physical and chemical parameters are as follows: bulk density 0.75g / ml; surface area 8m 2 / g; carbon content 60%; moisture 10%; ash 3%; volatile matter 4%; particle size 2-10 mesh. The experimental method is the same as in Example 1. The semi-coke raw material is still 100 grams, which is added to the reaction furnace at one time, but the liquid sulfur is added step by step, and added in two times within 5 hours, that is, half of the first addition, two hours Afterwards, add other half, reaction result is substantially identical with embodiment 1.

Embodiment 3

[0029] Example 3 The raw material source is the solid residue after dry distillation of lignite, the weight is 120 grams, and its physical and chemical parameters are as follows: bulk density 0.6g / ml; surface area 150m 2 / g; carbon content 88%; water content 5%; ash content 10%; volatile content 6%; particle size 5-20 mesh. Still adopt the experimental method of embodiment 1, reaction result is to obtain 265 grams of carbon disulfide. The yield was 36.4%.

[0030] Industrial Example According to the technical indicators of semi-coke in Example 1, an elliptical industrial carbon disulfide reactor with a long diameter of 1.0m, a short diameter of 0.5m and a height of 3.3m was used to expand the test, and 101kg of semi-coke was added and reacted for 23.5 hours to produce a total of 186kg of carbon disulfide .

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Abstract

A process for preparing CS2 features that the semi-coke or coke powder which is the solid dregs after dry distillation of crude coal or the refuse of coking plant is used as its raw material.

Description

technical field [0001] The invention relates to a preparation method of a compound containing carbon and sulfur, in particular to a preparation method of carbon disulfide. Background technique [0002] The traditional method of producing carbon disulfide is to use charcoal / activated carbon to react with liquid sulfur to generate carbon disulfide vapor, which is liquefied and rectified to obtain high-quality carbon disulfide. 80% of my country's current carbon disulfide production comes from charcoal, and 1 million tons of charcoal is needed every year, so a large amount of wood must be consumed. In recent years, with the implementation of the policy of restricting deforestation, the supply of charcoal has become increasingly tense and the price has been increasing, which has seriously affected the production of carbon disulfide. [0003] In the existing technology, the process of using methane as raw material to produce carbon disulfide is very mature in foreign countries, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/26
Inventor 孔庆然
Owner SHANGHAI BAIJIN CHEM GROUP
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