Catalyst for preparing acetaldehyde from methanol synthesis gas and preparation method thereof

A technology for methanol synthesis gas and catalyst, which is applied in catalyst activation/preparation, chemical instruments and methods, carbon monoxide reaction preparation, etc., can solve problems such as low ethane conversion rate, and achieve the effect of simple operation

Active Publication Date: 2021-05-07
SHANDONG YUHUANG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(5) Ethane oxidation method, Zhao et al. used bismuth and cerium as active components, and silica as a carrier catalyst to oxidize ethane to acetaldehyde. The selectivity of acetaldehyde was 40%, and the conversion rate of ethane was lower than 5%.

Method used

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  • Catalyst for preparing acetaldehyde from methanol synthesis gas and preparation method thereof

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Effect test

preparation example Construction

[0021] The preparation method of catalyst comprises:

[0022] S1. Immerse the solution of the precursor dissolved with the active component and the precursor dissolved with the auxiliary agent on the carrier.

[0023] Among them, the precursor of the active component is an organic water-soluble salt solution or an inorganic water-soluble salt solution of metals Pd, Zn, Co, Ni, Mn, Cu, and Fe. Specifically, the organic water-soluble salt includes acetate, and the inorganic water-soluble Salts include any of sulfates, nitrates and chlorides.

[0024] The precursor of the auxiliary agent is an inorganic water-soluble metal salt of alkali metal Na, K, Li and Cs, wherein the inorganic water-soluble metal salt includes any one of carbonate, nitrate, chloride and sulfate.

[0025] The solution of the precursor dissolved with the active component and the precursor dissolved with the auxiliary agent can be configured in the following way:

[0026] The precursor of the active componen...

Embodiment 1

[0036] A catalyst for preparing acetaldehyde from methanol synthesis gas, which is prepared by the following method:

[0037] Weigh 1.30g of palladium nitrate dihydrate and dissolve in distilled water to obtain 8ml of palladium nitrate solution; then weigh 0.11g of potassium nitrate and dissolve in distilled water to obtain 3ml of potassium nitrate solution, mix the above palladium nitrate solution and the above potassium nitrate solution at room temperature Mix evenly under ultrasonic to obtain a mixture.

[0038] Add the above mixed solution to 10g of SiO with a particle size of 20-40 mesh 2 Above, equal-volume ultrasonic impregnation for 1 hour, followed by static impregnation for 48 hours; then dried overnight in an oven, placed in a tube furnace, and roasted at 300°C for 4 hours in a nitrogen atmosphere to obtain the product.

[0039] Wherein, in the catalyst, the total load of palladium and potassium is 6%.

Embodiment 2

[0041] A catalyst for preparing acetaldehyde from methanol synthesis gas, which is prepared by the following method:

[0042] Weigh 1.83g of copper nitrate trihydrate, 2.25g of zinc nitrate hexahydrate and 0.94g of cobalt acetate tetrahydrate and dissolve in distilled water to obtain 9ml of the first solution, then weigh 0.13g of sodium sulfate and dissolve in distilled water to obtain 5ml of the first solution For the second solution, the first solution and the second solution are ultrasonically mixed at room temperature to obtain a mixed solution.

[0043] Add the above mixed solution to 10 g of activated carbon with a particle size of 20-40 mesh, impregnate with equal volume ultrasonically for 4 hours, and then stand for 32 hours; then dry it overnight in an oven, put it into a tube furnace, and place it in a nitrogen atmosphere Roasting at 650°C for 4h, that is.

[0044] Wherein, in the catalyst, the total load of sodium, copper, zinc and cobalt is 12.0%.

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Abstract

The invention relates to a catalyst for preparing acetaldehyde from methanol synthesis gas and a preparation method thereof, and relates to the field of chemical catalyst preparation. Wherein, the catalyst includes a carrier, an active component and an auxiliary; the active component includes at least one of Pd, Zn, Co, Ni, Mn, Cu and Fe, and the auxiliary is an alkali metal. The preparation method of the catalyst comprises: immersing the solution of the precursor dissolved with the active component and the precursor dissolved with the auxiliary agent on the carrier, drying, and roasting under nitrogen or inert gas atmosphere, the preparation process is simple, and it is convenient for industrial production. The prepared catalyst for preparing acetaldehyde from methanol synthesis gas has better catalytic activity and high selectivity to acetaldehyde, and can be used in industrialized preparation of acetaldehyde.

Description

technical field [0001] The invention relates to the field of chemical catalyst preparation, and in particular to a catalyst for preparing acetaldehyde from methanol synthesis gas and a preparation method thereof. Background technique [0002] Acetaldehyde is an important aliphatic compound, which is used for the manufacture of acetic acid, peracetic acid, acetic anhydride, ketene, ethyl acetate, crotonaldehyde, n-butanol, 2-ethylhexanol, pentaerythritol, chloral, pyridine, etc. The important raw materials of many important chemicals have high industrial application value and have been widely valued by scientific researchers. [0003] At present, the commonly used methods and catalysts for synthesizing acetaldehyde are mainly divided into the following types: (1) Ethylene oxidation method, the general process developed by Wacker and Hoechst companies in 1957-1959 is the direct oxidation reaction of ethylene exothermic catalysis, and the catalyst is made of PdCl 2 and CuCl 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/58B01J23/80B01J23/889B01J37/02C07C45/50C07C51/12C07C47/06C07C53/08C07C27/22
CPCB01J23/58B01J23/80B01J23/8892B01J37/0201C07C45/50C07C51/12C07C47/06C07C53/08
Inventor 杨德亮赵妍谢忠于丽萍徐晓伟蔡杰侯红霞王建伟王胜伟
Owner SHANDONG YUHUANG CHEM CO LTD
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