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Method for production of fuel ethanol from acetic acid

A technology for fuel ethanol and ethyl acetate, which can be applied in chemical instruments and methods, preparation of organic compounds, separation/purification of hydroxyl compounds, etc., and can solve the problems of increased size, energy consumption, low corrosion strength, etc.

Inactive Publication Date: 2014-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the second method, the first method has more esterification process, and a large amount of ethanol needs to be recycled as the esterification raw material, which increases the size of the hydrogenation reactor and the size and energy consumption of the heat exchangers before and after it, at least Part of the refining process is also doubled. The advantage is that the corrosion intensity of the hydrogenation process may be lower, but there is more or less acetic acid in the process, and there is still corrosiveness.

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  • Method for production of fuel ethanol from acetic acid
  • Method for production of fuel ethanol from acetic acid
  • Method for production of fuel ethanol from acetic acid

Examples

Experimental program
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Effect test

Embodiment 1

[0048] In this example, the catalyst for acetic acid hydrogenation is the acetic acid hydrogenation catalyst produced by Beijing Research Institute of Chemical Industry, the brand is BC-E-20, and the catalyst contains: (1) cobalt, wherein the cobalt metal content accounts for 30wt% of the total weight of the catalyst ; (2) molybdenum and chromium, respectively account for 2wt% of the total weight of the catalyst; the balance is silicon oxide. The catalyst is prepared by co-precipitation.

[0049] The method for producing fuel ethanol by acetic acid comprises the following steps:

[0050] (1) Hydrogenation: Preheat the acetic acid raw material and hydrogen, and then make it pass through a reactor equipped with a hydrogenation catalyst to hydrogenate acetic acid into crude ethanol product; the process conditions of acetic acid hydrogenation are: the liquid phase volume of acetic acid is empty The speed is 0.5h -1 , the molar ratio of hydrogen to acetic acid is 20:1, the reacti...

Embodiment 2

[0058] In this example, the acetic acid hydrogenation catalyst is the acetic acid hydrogenation catalyst produced by Beijing Research Institute of Chemical Industry, the brand is BC-E-20, and the catalyst contains: (1) cobalt, wherein the cobalt metal content accounts for 30wt% of the total weight of the catalyst ; (2) molybdenum and chromium, respectively account for 2wt% of the total catalyst weight; the balance is silicon oxide. The catalyst is prepared by co-precipitation.

[0059] The method for producing ethanol by acetic acid comprises the following steps:

[0060](1) Hydrogenation: Preheat the acetic acid raw material and hydrogen, and then make it pass through a reactor equipped with a hydrogenation catalyst to hydrogenate acetic acid into crude ethanol product; the process conditions of acetic acid hydrogenation are: the liquid phase volume of acetic acid is empty The speed is 0.75h -1 , the molar ratio of hydrogen to acetic acid is 15:1, the reaction temperature i...

Embodiment 3

[0068] In this example, the catalyst for acetic acid hydrogenation is the acetic acid hydrogenation catalyst produced by Beijing Research Institute of Chemical Industry. The catalyst contains: (1) cobalt, wherein the cobalt metal content accounts for 35wt% of the total weight of the catalyst; (2) barium and silver, Account for 1.5wt% of the total weight of the catalyst; the balance is silicon oxide. The catalyst is prepared by a homogeneous deposition method.

[0069] The method for producing ethanol by acetic acid comprises the following steps:

[0070] (1) Hydrogenation: Preheat the acetic acid raw material and hydrogen, and then make it pass through a reactor equipped with a hydrogenation catalyst to hydrogenate acetic acid into crude ethanol product; the process conditions of acetic acid hydrogenation are: the liquid phase volume of acetic acid is empty The speed is 0.5h -1 , the molar ratio of hydrogen to acetic acid is 17:1, the reaction temperature is 275°C, and the r...

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Abstract

Belonging to the technical field of alcohol substance production, the invention discloses a method for production of ethanol by acetic acid hydrogenation so as to solve the defects of ethanol purification processes in the prior art. Through intensive study, the inventor puts forward the process including: conducting hydrogenation on acetic acid directly to obtain a crude ethanol product, then separating unreacted acetic acid, removing ethyl acetate and removing water in order, thus obtaining the ethanol product. The method provided by the invention can effectively produce ethanol from the crude ethanol product produced in the acetic acid hydrogenation process, thus not only lowering the energy consumption of the separation process, but also effectively making up the petroleum energy shortage in China.

Description

technical field [0001] The invention relates to a method for producing ethanol, more specifically, the invention relates to a method for obtaining ethanol product through hydrogenation of acetic acid to ethanol and refining process. Background technique [0002] Ethanol is the earliest and most widely used fatty alcohol, and it is also the main component of wine. Ethanol is a colorless, volatile, flammable liquid at room temperature. Ethanol has a wide range of uses. For example, it can be used to produce chemical raw materials such as acetaldehyde, ether, ethyl acetate, ethylamine, ethyl acrylate, ethylene oxide, medicine, and pesticides. It can be mixed into gasoline and diesel oil, and can be mixed with water, Miscible with solvents such as acetic acid, acetone, benzene, carbon tetrachloride, chloroform, ether, ethylene glycol, glycerin, nitromethane, pyridine, and toluene, and can also be used as disinfectants, beverages, thinners, environmental protection paints, pesti...

Claims

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Application Information

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IPC IPC(8): C07C31/08C07C29/149C07C29/76
CPCC07C29/149B01J23/8878B01J23/8946C07C29/76C07C29/84C07C31/08
Inventor 田保亮唐国旗黄龙杨溢戴伟
Owner CHINA PETROLEUM & CHEM CORP
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