Production of esters chemical products from crop straw and method for preparing ester
A technology of straw and ethyl acetate, applied in the fields of energy, agriculture, and chemical industry
Inactive Publication Date: 2008-08-13
ECONOMIC CROPS RES INST OF SHANXI ACAD OF AGRI SCI
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Problems solved by technology
[0005] Extracting organic acids with ethyl acetate, using chloroacetic acid as an esterification catalyst, azeotropic deacidification of esters with water, and azeotropic separation of esters with water were invented by the inventor in the process of producing ethyl acetate with 15% waste acetic acid in 1990. Now Not yet at home and abroad
Method used
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Embodiment Construction
[0017] For example: to build a processing plant that processes 10,000 tons of wheat straw per year.
[0018] The wheat straw is cut, dried, crushed and stored. Into the cracking equipment, under the condition of isolating the air, contact with aluminum silicate particles with a preheating of 600℃ for thermal cracking, which can produce 6000 tons of liquid organic matter. Enter the extraction tower to extract 4000 tons of organic acids, and add 3000 tons of organic acids. Tons of ethanol and chloroacetic acid catalyst enter the esterification tower to synthesize 6000 tons of mixed esters. Through azeotropic distillation, 4500 tons of ethyl acetate, 1000 tons of ethyl propionate, 300 tons of ethyl butyrate, and 100 tons of ethyl valerate can be obtained. Esters, 100 tons of other high-grade esters, in the azeotropic distillation process, the remaining acid in the esterification reaction is removed, and then dehydrated and rectified into finished products. The average price per ton o...
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Abstract
Disclosed is a method for producing ester chemial industrial products from cropper straw and preparing ester. The method belongs to the agricultural products deep processing technology, the ester production bleongs to the chemical industry technology, by-product liquid fuel and gas fuel belong to the renewable energy development technology. The invention relates to the agriculture, chemical industry and energy fields. The invention mainly solves the pyrolysis technology problem of cropper straw, a technology problem of using pyrolysis products as materials to produce chemical industrial products such as ethyl acetate or the like, and technology problems of by-product liquid fuel and gas fuel. The invention is characterized in that, cropper straw is heated and pyrolyzed, the pyrolysis products are synthesized with ethanol to form mixture ester, the ester is refined, thereby producing chemical industrial products such as ethyl acetate or the like. At the same time, liquid fuel and gas fuel are by-produced.
Description
Technical field [0001] The thermal cracking of crop straw belongs to the deep processing technology of agricultural and sideline products, the production of ethyl ester belongs to the chemical technology, and the by-product liquid fuel and gas fuel belong to the development technology of renewable energy. This patent is involved in the fields of agriculture, chemical industry and energy. Background technique [0002] Under anaerobic conditions, crop straws are rapidly pyrolyzed, and aluminum silicate is used as a heat carrier, which is not available at home and abroad. [0003] As the raw material for the production of ethyl acetate, 98% acetic acid is used in China. Some foreign manufacturers use dilute acetic acid produced by fermentation method and use crop straw pyrolysis as raw material, which is not available at home and abroad. [0004] The title of the inventor is a chemical engineer. He has a history of producing ethyl acetate for 30 years. At that time, the raw material...
Claims
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IPC IPC(8): C07C67/14C07C69/003
Inventor 郭志强石其贵刘文萍侯东辉许瑛
Owner ECONOMIC CROPS RES INST OF SHANXI ACAD OF AGRI SCI