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C3-C5 alkyl alcohol and ethanol production system through acetic acid C3-C5 alkyl ester with hydrogen

A technology of C3-C5 and alkyl esters, which is applied in the system field of hydrogenation of C3-C5 alkyl acetates to produce C3-C5 alkyl alcohols and co-production of ethanol, which can solve the problems of high hydrogenation reaction pressure, harsh equipment requirements, Solve the problems of low selectivity of sec-butanol, and achieve the effects of high heat utilization rate, simple and practical process, and low equipment requirements

Active Publication Date: 2015-02-25
HUNAN RUIYUAN PETROCHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrogenation reaction pressure of this method is high, and the equipment requirement is harsh, and the conversion rate of sec-butyl acetate and the selectivity of sec-butanol are difficult to balance; the selectivity of sec-butanol is low, and the hydrogenation reaction is accompanied by the isomerization of sec-butanol The oxidation reaction leads to the production of a large amount of butanol, so it is not suitable for the industrial preparation of sec-butanol from sec-butyl acetate

Method used

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  • C3-C5 alkyl alcohol and ethanol production system through acetic acid C3-C5 alkyl ester with hydrogen
  • C3-C5 alkyl alcohol and ethanol production system through acetic acid C3-C5 alkyl ester with hydrogen
  • C3-C5 alkyl alcohol and ethanol production system through acetic acid C3-C5 alkyl ester with hydrogen

Examples

Experimental program
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Effect test

Embodiment 1

[0050] (1) Preparation of hydrogenation catalyst: prepared according to copper-chromium (Cu-Cr) atomic ratio of 2.35. Take copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) 70g and chromium nitrate (Cr(NO 3 ) 3 9H 2 O) 50g were dissolved in water respectively at 50°C to form a mixed aqueous solution. Weigh 12g carrier γ-Al 2 o 3 Add it to the solution, and maintain it in an incubator at 25°C for 20h. Ordinary filtration was used to remove excess solution, and the filtrate was dried in an oven at 120°C for 12 hours, and then calcined in a muffle furnace for 5 hours at 500°C to obtain an alumina-supported copper-chromium catalyst.

[0051] (2) Hydrogenation catalyst loading and reduction: 5 parts by weight of the copper-chromium catalyst and 1 part by weight of alumina particles were mixed uniformly and loaded into the reactor. The hydrogenation reactor is a small stainless steel fixed bed reactor. The inner diameter of the reaction chamber is 14mm, filled with 30g of the catalyst ...

Embodiment 2

[0054] The catalyst preparation steps are the same as in Example 1, except that the active component copper-chromium (Cu-Cr) atomic ratio is 10. Under optimized process conditions, the conversion rate of sec-butyl acetate is 97.62%, and the selectivity of sec-butanol is 98.33%.

Embodiment 3

[0056] The catalyst preparation steps are the same as in Example 1, except that the active component copper-silver (Cu-Ag) atomic ratio is 18, and the carrier is mesoporous molecular sieve. Under optimized process conditions, the conversion rate of sec-butyl acetate is 93.61%, and the selectivity of sec-butanol is 97.21%.

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Abstract

The invention relates to a C3-C5 alkyl alcohol and ethanol production system through acetic acid C3-C5 alkyl ester with hydrogen. The system comprises an acetic acid C3-C5 alkyl ester gasifier, a raw material preheating device, a mixing valve, a hydrogenation reactor, a high pressure buffering tank, a low pressure buffering tank, a crude alcohol separation tower, an ethanol dehydration tower, an ethanol dehydration tower reflux tank and a C3-C5 alkyl alcohol distillation tower. By using the system, the process is simple, the required equipment is few, the environment is protected, main by-product emission is avoided, and the system has high adaptability; the heat of the whole process is utilized in a stepped manner, the heat efficiency is high, and energy consumption is low.

Description

technical field [0001] The invention relates to a system for hydrogenating C3-C5 alkyl acetate to produce C3-C5 alkyl alcohol and co-producing ethanol, in particular to a non-grain method for hydrogenating C3-C5 alkyl acetate to produce C3-C5 alkyl alcohol and co-producing the system A system for the co-production of ethanol. Background technique [0002] According to the classification data of acetate products released by the National Bureau of Statistics, acetates mainly include methyl acetate, ethyl acetate, n-butyl acetate, isobutyl acetate, 2-ethoxyethyl acetate, vinyl acetate And other aliphatic hydrocarbon esters, in addition there are other unstated acetates such as propyl acetate, amyl acetate, etc. [0003] As the international oil price drops step by step, the domestic chemical product market continues to slump, and the development of new chemical derivatives has become the key direction of various manufacturers and scientific research structures. Among them, ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/149C07C31/08C07C31/10C07C31/12C07C31/125
CPCC07C29/149C07C29/80C07C29/82C07C31/08C07C31/10C07C31/12C07C31/125
Inventor 甘健李园园刘成
Owner HUNAN RUIYUAN PETROCHEM
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