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Preparation method of improved copper base catalyst for methanol synthesis

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: 2014-01-01
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 base catalyst for methanol synthesis
  • Preparation method of improved copper base catalyst for methanol synthesis

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 base catalyst for methanol synthesis, and a preparation method thereof, and belongs to the technical field of catalysts. The catalyst is obtained by preparing a three-component catalyst system through adopting a coprecipitation process, and the main components of the catalyst comprise Cu, Zn and Al. The preparation method comprises the following steps: adding a mixed solution containing Cu and Zn into an alkaline solution containing Na for precipitation, and adding an impurity displacement aid alkaline solution containing K in a precipitating agent during the color change of a mother solution or after the washing process of the mother solution to prepare a highly-active maternal having a low impurity content; and adding an alumina carrier, washing, filtering, drying, roasting, and molding to prepare a cooper system catalyst sample for the methanol synthesis. The catalyst is suitable for the preparation of methanol from a synthetic gas containing CO, CO2 and H2, and is especially suitable for low-temperature low-pressure methanol synthesis apparatuses.

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 Applications(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