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Preparation method for synthesizing methanol catalyst

A technology for synthesizing methanol and catalysts, which can be used in chemical instruments and methods, catalysts for physical/chemical processes, and hydrocarbon production from carbon oxides. long life effect

Inactive Publication Date: 2007-01-10
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low-temperature activity of the catalyst produced by this method is not good, and the heat resistance is poor
The service life is also short, generally half a year to one year

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh Cu(NO 3 ) 2 ·3H 2 O 26g, Zn(Ac) 2 ·6H 2 O 24g, Al(NO 3 ) 3 9H 2 O 9g, Zr(NO 3 ) 4 ·5H 2 O 4g, mix and configure 250ml mixed salt solution after stirring and dissolving with deionized water respectively; Weigh Na 2 CO 3 27g, dissolved in 250ml deionized water. The two solutions were alternately precipitated at 70°C under agitation, the end point of the pH value of the alkali side was 9.5, the end point of the pH value of the acid side was 5.0, and the number of alternations was 3 times. After the reaction is completed, the precipitated mother liquor is aged at 80°C for 2 hours under stirring, washed with deionized water, and filtered until the filtrate does not contain Na + ions, then dried in an air atmosphere at 110°C in a drying oven for 12 hours, calcined at 350°C for 9 hours, cooled to room temperature, pressed into tablets, crushed to take 40-60 mesh (0.45-0.30mm) particles for later use. The resulting catalyst was Sample A.

Embodiment 2

[0025] Weigh Cu(NO 3 ) 2 ·3H 2 O 52g, Zn(NO 3 ) 2 ·6H 2 O 48g, Al(NO3) 3 9H 2 O18g, Mg(NO 3 ) 2 ·6H 2 O 3g, after stirring and dissolving with deionized water respectively, mix and configure 250ml mixed salt solution; weigh K 2 CO 3 70g, dissolved in 250ml deionized water. Under the condition of stirring, the two solutions were alternately precipitated at 60° C., the end point of the pH value of the alkali side was 12.0, the end point of the pH value of the acid side was 1.0, and the number of alternations was 4 times. After the reaction is completed, the precipitated mother liquor is aged at 70°C for 3 hours under stirring, washed with deionized water, and filtered until the filtrate does not contain Na + ions, and then dried in an air atmosphere at 120°C in a drying oven for 9 hours, baked at 350°C for 6 hours, cooled to room temperature, pressed into tablets, crushed to take 40-60 mesh (0.45-0.30mm) particles for later use. The resulting catalyst was Sample B....

Embodiment 3

[0027] Weigh Cu(NO 3 ) 2 ·3H 2 O 39g, Zn(Ac) 2 ·6H 2 O 24g, Al(NO3) 3 9H 2 O 12g, 50% Mn(NO 3 ) 2 Solution 3g, stir and dissolve with deionized water respectively and mix to form 250ml mixed salt solution; weigh NaHCO 3 20g, dissolved in 250ml deionized water. Under the condition of stirring, the two solutions were alternately precipitated at 80°C, the end point of the pH value of the alkali side was 10.0, and the end point of the pH value of the acid side was 3.0, and the number of alternations was 2 times. After the reaction is completed, the precipitated mother liquor is aged at 90°C for 1 hour under stirring, washed with deionized water, and filtered until the filtrate does not contain Na + ions, and then dried in an air atmosphere at 130°C in a drying oven for 9 hours, roasted at 400°C for 6 hours, cooled to room temperature, pressed into tablets, crushed to take 40-60 mesh (0.45-0.30mm) particles for later use. The resulting catalyst was Sample C.

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PUM

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Abstract

This invention relates to a preparation method for synthesizing methyl alcohol catalyst-acid-alkali alternate deposition method including: 1, solving the nitrate or acetate of Cu, Zn and Al in water to get a mixed salt solution, 2, preparing alkali solution, 3, alternately adding the alkali solution and the mixed salt solution in a deposition tank while mixing to alter the PH value of the mother liquor with the PH value of 1.0-12.0, 4, aging the deposition mother liquor under mixing then to wash, filter, dry the cakes, bake to press or squeeze them to molding, in which, one nitrate or acetate of Zr, Mg, Mn, Cr, La or Ce can be added into the mixed solution in step 1.

Description

(1) Technical field [0001] The present invention relates to a kind of preparation method of synthetic methanol catalyst, especially CO+H 2 or CO 2 +H 2 Copper-based catalyst for the synthesis of methanol. (2) Background technology [0002] Methanol is an extremely important chemical raw material, which is widely used in organic synthesis, dyes, fuels, medicines, coatings and national defense industries. Its output is second only to synthetic ammonia and ethylene, ranking third in the world. In recent years, methanol demand and production capacity have continued to grow along with industrial development. [0003] In industry, methanol is generally used to contain H 2 , CO, CO 2 Syngas is produced under certain conditions of pressure, temperature and presence of catalysts. At present, medium and low pressure gas phase methods are widely used in the world to synthesize methanol, and the catalysts used are basically mixed oxides of copper, zinc and aluminum. The existing ...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07C1/04C07C1/12C07C31/04
CPCY02P20/52
Inventor 岑亚青刘化章李小年国海光
Owner ZHEJIANG UNIV OF TECH
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