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Method for preparing barium carbide and producing acetylene

A barium carbide and product technology, which is applied in the field of barium carbide and acetylene preparation, can solve the problems of high energy consumption and harsh synthesis conditions of coal-based acetylene carbide, and achieve the effects of simple process, reduced energy consumption and mild reaction conditions

Active Publication Date: 2022-02-18
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method for preparing barium carbide and producing acetylene, aiming to solve the problem of harsh synthesis conditions of coal-based acetylene carbide and high energy consumption in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Mix lumpy metallurgical coke (fixed carbon content of 85%) and barium carbonate (mass content of barium carbonate is greater than 98%) according to the molar ratio of carbon to barium of 4:1, and then process it into a powder mill with a particle size of 20 mesh or more The mixed powder with no more than 2% is sent into a microwave heating furnace with an air extraction system, and reacted at 1390-1420°C and a pressure of 0.01-0.02atm for 60 minutes to obtain barium carbide with a mass percentage of 82-85%. The product, the furnace gas is sent to the CO purification process after heat exchange and dedusting, and the barium carbide product is sent to the acetylene generator after heat exchange to react with water to generate acetylene.

Embodiment 2

[0031] Mix blue carbon (fixed carbon content of 87%) and barium carbonate (mass content of barium carbonate is greater than 98%) according to the carbon-barium molar ratio of 3.9:1 and then process it into a mixed powder with a particle size of 40-80 mesh. Send the powder into a microwave heating furnace with an air extraction system, and react in a hydrogen atmosphere at 1380-1410°C and a pressure of 0.015-0.02 atm for 60 minutes to obtain a product with a mass percentage of barium carbide of 89-93%. After heat exchange and cooling, the barium carbide product is sent to the acetylene generator to react with water to obtain acetylene, and the furnace gas is sent to the CO purification process after heat exchange and dust removal. By comparison of Example 1 and Example 2, it can be seen that the reaction in a hydrogen atmosphere can increase the content of barium carbide in the product.

Embodiment 3

[0033] Coal-based activated carbon (fixed carbon content is 99%) and barium hydroxide (mass content of barium hydroxide is greater than 97%) is made into a mixed powder with a particle size of 20-40 mesh according to the carbon-barium molar ratio of 3.9:1. Put the powder into an electric heating furnace, react at 1520°C, 0.015-0.02atm, and argon atmosphere for 180 minutes to obtain a product with a mass percentage of barium carbide of 86%. After heat exchange and cooling, the barium carbide product is sent to the acetylene generator to react with water to obtain acetylene, and the furnace gas is sent to the CO purification process after heat exchange and dust removal.

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Abstract

The invention discloses a method for preparing barium carbide and producing acetylene. The method includes steps of: mixing a carbon raw material and a barium raw material in proportion to prepare a powdery material; placing the treated mixed material in a high-temperature furnace and heating the material to 1300-1650 DEG C in a non-oxygen atmosphere to react for 0.5-4 hours to obtain a barium carbide product, the mass percentage content of barium carbide in the product being not lower than 60%; and further feeding the prepared barium carbide into an acetylene generator to react with water to obtain acetylene gas. According to the method, barium carbide is adopted to replace calcium carbide to prepare acetylene, barium carbide with high content can be prepared under milder conditions, and acetylene can be directly generated through gas generation with water without complex procedures such as liquid-phase carbide cooling, demolding and crushing in the later period. Compared with a calcium carbide acetylene process, the barium carbide acetylene process is mild in reaction condition and simple in process, energy consumption and emission can be reduced, and the purposes of energy conservation, consumption reduction and environment-friendly acetylene production are achieved.

Description

technical field [0001] The invention relates to the technical field of preparing barium carbide and acetylene, in particular to a method for preparing barium carbide and producing acetylene. Background technique [0002] Acetylene is an important chemical basic raw material, which can produce acetaldehyde, acetic acid, vinyl chloride, tetrachloroethane, vinyl acetylene and other ethers and esters through addition or polymerization reactions, and is widely used in solvents, plastics , rubber, coatings, pesticides, synthetic fibers, solar cells, semiconductor materials and other new energy fields, known as the "mother of organic chemistry". my country is a country rich in coal, poor in oil and little in gas. Acetylene is mainly produced through the reaction of coal with calcium carbide and water to generate gas. Due to the simple reaction process of calcium carbide and water, the key technology and cost control of coal-based acetylene mainly lies in coal-based calcium carbide...

Claims

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Application Information

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IPC IPC(8): C01B32/935C10H21/00C01B32/40C01F11/02
CPCC01B32/935C10H21/00C01B32/40C01F11/02
Inventor 姜标赵虹陈思远
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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