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Process for producing acetic acid by utilizing tail gas of calcium carbide furnace

A technology of calcium carbide furnace tail gas and acetic acid, which is applied in the chemical industry, can solve the problems of waste of CO resources, pollute the environment, etc., and achieve the effects of reducing production costs, improving economic benefits, and reducing costs

Inactive Publication Date: 2010-02-17
傅永茂
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, for the treatment of calcium carbide furnace tail gas, most enterprises burn it with a torch or introduce a boiler to burn it, which pollutes the environment and wastes valuable CO resources.

Method used

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  • Process for producing acetic acid by utilizing tail gas of calcium carbide furnace

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Embodiment Construction

[0029] Concrete technological process of the present invention is:

[0030] The high-temperature calcium carbide furnace tail gas of about 600 ℃ drawn from the exhaust pipe of the closed calcium carbide furnace is cooled to 220 ℃ ~ 250 ℃ by the air-cooled dust collector, and then sent to the bag filter for dust removal. After leaving the bag filter, the calcium carbide furnace tail gas contains dust. The amount is 40mg / Nm 3 the following. Then send it to the cooling and dedusting water washing tower for further wet cooling and dedusting, so that the temperature of the calcium carbide furnace tail gas is less than 45°C and the dust content is less than 1mg / Nm 3 the following. After leaving the water washing tower, the water droplets entrained in the gas are separated by the separation tower, and a booster is introduced to increase the pressure of the gas to 350 mm Hg, and then it is stored in a pipeline gas supply cabinet. The purified calcium carbide furnace tail gas from t...

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Abstract

The invention relates to a process for producing acetic acid by utilizing the tail gas of a calcium carbide furnace. The process is characterized in that after the tail gas of the calcium carbide furnace is treated by dry dedusting, wet dedusting, alkaline wash, coal tar removal and CO purification, a methanol-carbon monoxide low-pressure oxo-synthesis method is adopted to produce acetic acid in aprocess production system. The process places emphasis on purifying the tail gas of calcium carbide and providing CO which is a raw material gas for a production system for producing the acetic acidwith a high added value by recovering, optimizing and utilizing high-concentration CO in the tail gas of the calcium carbide. The invention has the following technical characteristics of opening a newraw material source of acetic acid production, sufficiently recovering and utilizing the CO in the tail gas of the calcium carbide so as to convert the CO into an acetic acid product with a higher added value, reducing the production cost of acetic acid, improving the economic benefit of the product, reducing the pollution treatment cost of the tail gas of the calcium carbide and being beneficialto the establishment of a circulating economic circle in the field.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a process for producing acetic acid by utilizing tail gas of a calcium carbide furnace. Background technique [0002] Acetic acid, scientific name acetic acid, alias glacial acetic acid, molecular weight 60.05, mainly soluble in water, ether, glycerin, insoluble in carbon disulfide. [0003] Acetic acid is a colorless clear liquid with a pungent odor. At low temperature, anhydrous acetic acid solidifies into ice, commonly known as glacial acetic acid. Acetic acid is a kind of organic carboxylic acid and is an extremely important organic chemical raw material. The most important use is to produce vinyl acetate, acetic anhydride, cellulose acetate, acetates, terephthalic acid, chloroacetic acid and acetates, etc. It is an important raw material for synthetic fibers, adhesives, medicines, dyes and pesticides. In addition, acetic acid is an excellent organic solvent and...

Claims

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Application Information

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IPC IPC(8): C07C53/08C07C51/12
Inventor 傅永茂魏彦辉
Owner 傅永茂
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