Method for preparing acetylene by utilization of calcium carbide powder

A technology of calcium carbide powder and acetylene, applied in the parts of acetylene gas generators, acetylene generators, petroleum industry, etc., can solve the problems of low purity of acetylene, achieve the effect of low cost, simple process, and low purity

Inactive Publication Date: 2016-06-22
宁波市北仑欧绿乙炔制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing acetylene by using calcium carbide powder. The method is simple in process, easy to operate, low in cost, and the purity of acetylene can reach 99.99%, which solves the problem of low purity of acetylene and has good Application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Put 100kg of calcium carbide powder with a particle size of 60mm into the acetylene generator (the pressure is 800mmH 2 (2), react with 100kg of water at 76°C to generate thick acetylene and carbide slag;

[0017] (2) Cool the crude acetylene first, then enter the concentrated sulfuric acid cleaning tower to remove hydrogen sulfide, phosphine, and arsine, and then enter the neutralization tower to neutralize with sodium hydroxide solution to remove the hydrogen sulfide carried in the crude acetylene. Acid gas; then enter the low-pressure dryer, dry with calcium chloride, remove part of the water in the acetylene, and send it to the low-pressure oil-water separator for oil-water separation; finally remove the oil and water to obtain pure acetylene, the purity of which is 99.99% after testing %.

Embodiment 2

[0019] (1) Put 100kg of calcium carbide powder with a particle size of 50mm into the acetylene generator (the pressure is 700mmH 2 (2), react with 110kg of water at 78°C to generate thick acetylene and carbide slag;

[0020] (2) Cool the crude acetylene first, then enter the concentrated sulfuric acid cleaning tower to remove hydrogen sulfide, phosphine, and arsine, and then enter the neutralization tower to neutralize with sodium hydroxide solution to remove the hydrogen sulfide carried in the crude acetylene. Acid gas; then enter the low-pressure dryer, dry with calcium chloride, remove part of the water in the acetylene, and send it to the low-pressure oil-water separator for oil-water separation; finally remove the oil and water to obtain pure acetylene, the purity of which is 99.99% after testing %.

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Abstract

The invention relates to a method for preparing acetylene by the utilization of calcium carbide powder. the method comprises the following steps: (1) pouring calcium carbide powder into an acetylene generator, and reacting between the calcium carbide powder and water at 76-78 DEG C to generate crude acetylene and calcium carbide residue; (2) cooling the crude acetylene, letting the cooled crude acetylene enter a concentrated sulfuric acid cleaning tower to remove hydrogen sulfide, hydrogen phosphide and arsenide hydrogen, neutralizing with alkali lye by entering a neutralizing tower, and removing acid gas in the crude acetylene; drying with calcium chloride by entering a dryer, removing part of moisture in acetylene, and carrying out oil-water separation by sending into an oil-water separator; and finally removing oil and moisture so as to obtain pure acetylene. The method has simple process, is easy to operate and is low-cost. Purity of acetylene can reach 99.99%. Thus, the problem of low purity of acetylene is solved. The method of the invention has a good application prospect.

Description

technical field [0001] The invention belongs to the field of acetylene preparation, in particular to a method for preparing acetylene by using calcium carbide powder. Background technique [0002] Acetylene (C 2 h 2 ) is one of the important raw materials of the basic organic synthesis industry, with calcium carbide (CaC 2 ) as raw material, the process of producing acetylene by adding water (wet method) is simple and mature. It has an industrial history of more than 60 years, and it still accounts for a large proportion in our country. Adding water to 1 ton of calcium carbide can generate more than 300 kg of acetylene gas, and at the same time generate 10 tons of industrial waste liquid with a solid content of about 12%, commonly known as calcium carbide slurry. [0003] At present, with the continuous expansion of the application of dissolved acetylene, the quality of acetylene is becoming more and more important. Excessive impurity content in acetylene will affect the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10H11/00C10H21/00
Inventor 唐旭东王一群王金伟王一丰王维维石纪雅
Owner 宁波市北仑欧绿乙炔制造有限公司
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