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Preparation method of improved copper-based methanol synthesis catalyst

A methanol synthesis and catalyst technology, applied in the preparation of hydroxyl compounds, organic compounds, chemical instruments and methods, etc., can solve the problems of blocked channels, side reactions, etc., and achieve the effect of good selectivity and physical and chemical properties

Active Publication Date: 2016-08-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that Na + It is easy to segregate on the catalyst surface, cover the active center, and block the pores at the same time. In addition, too high Na + prone to side effects

Method used

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  • Preparation method of improved copper-based methanol synthesis catalyst
  • Preparation method of improved copper-based methanol synthesis catalyst

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0012] 1L contains 120gCu(NO 3 ) 2 and 115gZn(NO 3 ) 2 A solution, heated to 70 ~ 90 ℃ for use. 210gNaHCO 3 Dissolve 3 g of impurity replacement aid KOH in 3 L of deionized water to prepare solution B, and heat to 70-86° C. for use. Add solution A to solution B under stirring, control the temperature at 65-85°C during the neutralization process, and control the pH value at the end point at 6.5-8.0. The mother slurry is naturally settled several times until the washing water is dripped with 10 drops of diphenylamine sulfate and no blue is formed.

example 2

[0014] 1L contains 120gCu(NO 3 ) 2 and 115gZn(NO 3 ) 2 A solution, heated to 70 ~ 90 ℃ for use. 210gNaHCO 3 Dissolve in 3L deionized water to make solution B, and heat to 70-86°C for use. Add solution A to solution B under stirring, control the temperature in the neutralization process at 65-85°C, control the end-point pH value at 6.5-8.0, and add 4g of impurity replacement additive K when the master slurry changes color 2 CO 3 , The mother pulp is naturally settled several times until the washing water is dripped with 10 drops of diphenylamine sulfate and no blue.

example 3

[0016] 1L contains 120gCu(NO 3 ) 2 and 115gZn(NO 3 ) 2 A solution, heated to 70 ~ 90 ℃ for use. 210gNaHCO 3 Dissolve in 3L deionized water to make solution B, and heat to 70-86°C for use. Add solution A to solution B under stirring, control the temperature at 65-85°C during the neutralization process, and control the final pH value at 6.5-8.0. After the mother pulp changes color and ages, it undergoes natural sedimentation for several times, until the washing water is dripped with 10 drops of diphenylamine sulfate and no blue Then add 3.5g impurity replacement additive KHCO to the slurry 3 , and the mother liquor was allowed to stand for 12h.

[0017] Alumina carrier was added to the matrix with low impurity content and high activity obtained in the above example, and a copper-based methanol synthesis catalyst sample was prepared through washing, filtering, drying, roasting, molding and other processes.

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Abstract

The invention relates to an improved copper-based methanol synthesis catalyst and a preparation method thereof, belonging to the technical field of catalysts. The catalyst is a three-component catalyst system prepared by co-precipitation method, and the main components include copper, zinc and aluminum. The preparation process is as follows: add the mixed solution containing Cu and Zn to the alkaline solution containing sodium for precipitation, and add the alkaline solution containing potassium as an impurity replacement auxiliary agent in the precipitant, when the mother liquor changes color or at the end of the washing process of the mother liquor, A highly active precursor with low impurity content is obtained. Alumina carrier is added, and a copper-based methanol synthesis catalyst sample is prepared through washing, filtering, drying, roasting, molding and other processes. The catalyst is suitable for containing CO, CO 2 and H 2 Synthesis gas to methanol is especially suitable for low-temperature and low-pressure methanol synthesis units.

Description

technical field [0001] The invention discloses a preparation method of a copper-based methanol synthesis catalyst, which belongs to the technical field of catalysts. Background technique [0002] As a basic chemical raw material and an environmentally friendly power fuel, methanol is widely used in formaldehyde, ethanol, acetic acid, methyl tert-butyl ether, medicine, pesticide, vehicle fuel, etc. It can be obtained from gas raw materials natural gas and oilfield gas, liquid raw materials naphtha and residual oil, and solid raw materials such as coal through partial oxidation or steam reforming, and then purified, synthesized, and rectified. Industrial methanol is generally used to contain H 2 , CO, CO 2 The synthesis gas is produced by reaction under the conditions of certain pressure and temperature and the presence of a catalyst. The catalyst adopts Cu-Zn-Al system, in which copper and zinc oxides are called the active matrix, and alumina is the carrier. The catalyst o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80C07C31/04C07C29/154
CPCY02P20/52
Inventor 王琼陈海波毛春鹏贺健仇冬殷惠琴
Owner CHINA PETROLEUM & CHEM CORP