Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of method that hydrogenation of acetic acid prepares ethanol

A technology for the preparation of hydrogen and acetic acid, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve problems such as catalyst deactivation, no commercial value, serious liquid phase corrosion, etc., to reduce energy consumption , improve quality, reduce the effect of acetic acid content

Active Publication Date: 2017-03-29
CHINA PETROLEUM & CHEM CORP +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The direct hydrogenation of acetic acid liquid phase discloses few documents and patents, and this is because acetic acid is a highly corrosive organic acid, and the corrosiveness of its liquid phase is particularly serious. Therefore, as described in European Patent US EP0198681, in In liquid phase direct hydrogenation of acetic acid, the catalysts used are rapidly deactivated, which makes the process not commercially viable

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of method that hydrogenation of acetic acid prepares ethanol
  • A kind of method that hydrogenation of acetic acid prepares ethanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In this embodiment, the catalyst for gas-phase hydrogenation of acetic acid 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 catalyst weight %; (2) molybdenum and tin account for 2wt% and 15wt% of the total catalyst weight respectively; the remainder is silicon oxide. The catalyst is prepared by co-precipitation. The catalyst for liquid-phase hydrogenation of acetic acid is a ruthenium-tin-platinum catalyst supported by activated carbon.

[0047] The specific flow chart is attached figure 1 shown

[0048] (1) Gas-phase hydrogenation: preheating acetic acid raw material and hydrogen to form a steam feed stream, introducing the steam feed stream into the reactor R101 equipped with a gas-phase hydrogenation catalyst to hydrogenate acetic acid into crude ethanol product. The process condition of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing ethanol through hydrogenating acetic acid. The method comprises the steps of directly carrying out gas phase hydrogenation on acetic acid under the condition of low pressure so as to prepare a crude ethanol product, separating a liquid phase by a gas-liquid separation tank, and then, carrying out liquid phase hydrogenation, thereby obtaining high-selectivity ethanol. The method has the advantages that the quality of the final ethanol product can be improved, and the energy consumption of a subsequent separation process can be effectively lowered.

Description

technical field [0001] The invention belongs to the field of catalytic hydrogenation, in particular to a method for preparing ethanol through hydrogenation of acetic acid. Background technique [0002] At present, the industrial production methods of ethanol mainly include fermentation method and ethylene hydration method. Ethylene hydration method is developed along with the rise of petrochemical industry, including indirect hydration method and direct hydration method. Due to the increase of ethylene production cost in recent years, the ethylene hydration method in my country is basically in a state of suspension. The main raw material of the fermentation method is crops (including corn, sugarcane, sorghum, cassava, rice, etc.), and ethanol is obtained by fermenting starch in the crops. The raw materials used by my country's main ethanol production enterprises are corn, wheat and cassava (mainly relying on imports). In fact, the cost of food has risen sharply in recent ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/08C07C29/149
CPCC07C29/149C07C31/08
Inventor 杨溢黄龙田保亮唐国旗李宝芹戴伟王国清
Owner CHINA PETROLEUM & CHEM CORP