Method for mixing and gasifying liquid-phase acetic acid and hydrogen

A technology of mixed gas and acetic acid, which is applied in chemical methods, chemical instruments and methods, and preparation of organic compounds for reacting liquid and gaseous media. Corrosion problems, effect of reducing requirements

Active Publication Date: 2013-02-06
JIANGSU SOPO CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mixed gasification method of acetic acid and hydrogen described in this patent has the following disadvantages: First, the molar ratio of H2 / acetic acid in the mixed gas cannot be accurately controlled

Method used

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  • Method for mixing and gasifying liquid-phase acetic acid and hydrogen
  • Method for mixing and gasifying liquid-phase acetic acid and hydrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] refer to figure 1 , this specific embodiment adopts the following technical solutions: temperature 160 o C. Acetic acid 1 with a pressure of 1MPa enters the evaporator from the bottom, and the acetic acid is distributed in the evaporator as a continuous phase; the temperature is 230 o C, the hydrogen-containing gas 2 with a pressure of 1 MPa passes through the acetic acid layer in the form of bubbling, and in the contact process with acetic acid, under the effect of an external heat source, by controlling the temperature of the mixed gas 3 at the top of the evaporator, the H2 / acetic acid molar ratio is obtained. 15. Mixed gas with a pressure of 1MPa. The temperature of the mixed gas 3 at the top of the evaporator under the operating pressure of 1 MPa is lower than the boiling point of acetic acid under the operating pressure.

[0026] The data of each process parameter in Embodiment 2 to Embodiment 7 are shown in Table 1, and other conditions are the same as Embodimen...

Embodiment 8

[0030] temperature 30 o C. Propionaldehyde 1 with a pressure of 1MPa enters the evaporator from the bottom, and the propionaldehyde is distributed in the evaporator as a continuous phase; the temperature is 100 o C. Hydrogen-containing gas 2 with a pressure of 1 MPa passes through the propionaldehyde layer in a bubbling manner. During the contact process with propionaldehyde, under the action of an external heat source, by controlling the temperature of the mixed gas 3 at the top of the evaporator, H2 / propionaldehyde is obtained A mixed gas with a molar ratio of 1 and a pressure of 1 MPa. The temperature of the mixed gas 3 at the top of the evaporator under the operating pressure of 1 MPa is lower than the boiling point of propionaldehyde under the operating pressure.

Embodiment 9

[0032] Temperature 160 o C. Propionaldehyde 1 with a pressure of 20MPa enters the evaporator from the bottom, and the propionaldehyde is distributed in the evaporator as a continuous phase; the temperature is 300 o C. Hydrogen-containing gas 2 with a pressure of 20 MPa passes through the propionaldehyde layer in a bubbling manner. During the contact process with propionaldehyde, under the action of an external heat source, by controlling the temperature of the mixed gas 3 at the top of the evaporator, H2 / propionaldehyde is obtained A mixed gas with a molar ratio of 250 and a pressure of 20 MPa. The temperature of the mixed gas 3 at the top of the evaporator under the operating pressure of 20 MPa is lower than the boiling point of propionaldehyde under the operating pressure.

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Abstract

The invention provides a method for mixing and gasifying liquid-phase acetic acid and hydrogen, comprising the steps of mixing and gasifying acetic acid and gas containing hydrogen in an evaporator, wherein the temperature of the hydrogen before mixing is 100-300 DEG C, the temperature of the acetic acid is 30-160 DEG C and the pressure of the acetic acid and the hydrogen is 1.0-20.0 MPa; and controlling the temperature of mixed gas of the top of the evaporator to obtain the mixed gas with an H2 / acetic acid mol ratio of 1-250 and the pressure of 1.0-20.0 MPa. According to the method disclosed by the invention, the acetic acid can be gasified at the temperature which is lower than an acetic acid boiling point under operation pressure and the problem of high-temperature corrosion of the liquid-phase acetic acid is solved; and the H2 / acetic acid mol ratio in the mixed gas can be well controlled. Furthermore, in a process of mixing and gasifying the liquid-phase acetic acid and the gas containing the hydrogen, the acetic acid is heated by an external heat source to provide gasification latent heat of the acetic aid, and the requirement on an external heat supply can be reduced.

Description

technical field [0001] [0002] The invention relates to the field of chemical production, in particular to a method for gasification by mixing liquid-phase acetic acid and hydrogen-containing gas. [0003] technical background [0004] Ethanol is an important basic chemical raw material and organic solvent, as well as an ideal high-octane non-polluting vehicle fuel and its additives. The existing industrial production methods of ethanol basically adopt the fermentation method, which can be divided into starch fermentation ethanol production process and cellulose ethanol production process according to different raw materials. Fuel ethanol has developed rapidly as a clean energy source, but it cannot be widely promoted in my country due to the limitation of raw material costs and food problems, and it is urgent to develop new ways of ethanol production. In recent years, with the expansion of industrial acetic acid production capacity, the price of acetic acid has cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J10/00C07C31/08C07C29/149
Inventor 宋勤华夏吴邵守言肖晓愚凌晨王留书朱桂生阳俊朱怀松彭杰唐丽
Owner JIANGSU SOPO CHEM
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