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Methanol synthesizing catalyst

A methanol synthesis and catalyst technology, which is applied in the field of copper-zirconium oxide catalysts, can solve the problem of low overall activity of the catalyst, and achieve the effects of good mechanical strength, simple preparation method, and high activity

Inactive Publication Date: 2003-06-04
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the overall activity of the catalyst is still low

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Prepare the mixed solution with the following metal atom molar ratio: Cu25Zr50Mn12Ni13, (except that Zr is in the form of zirconium oxychloride, all the other elements are dissolved in distilled water in the form of nitrate to form a 15% mixed solution). Co-precipitate with 30 (Wt)% sodium carbonate solution at 70°C. The precipitation process needs to be fully stirred to maintain pH = 9. The precipitate is washed with distilled water until no chloride ions are detected, dried at 120°C and heated at 350°C. Roast and crush to 20-40 mesh for later use. CO+H 2 The reaction was carried out in a stainless steel reactor with an inner diameter of 10mm. Before the reaction, the catalyst was reduced with pure hydrogen at 280°C for 10 hours, and then switched to syngas for the reaction. The operating conditions were as follows: P=12.0MPa, T=280°C, GHSV=10000h -1 , H 2 / CO=2, the liquid phase product was collected in an ice-water bath, and the composition of the product was analy...

Embodiment 2

[0018] The catalytic composition of embodiment 2 is as follows: Cu24Zr49Mn13Ni13K1, and the catalyst preparation method is the same as that of embodiment 1. P=12.0MPa, T=280℃, GHSV=8000h -1 , H 2 / CO=2, the obtained result is: CO conversion rate hydrocarbon selectivity (%) CO 2 Selectivity (%) Alcohol selectivity (%) Space-time yield g / ml cat hr61.85 1.36 3.10 95.53 2.20

Embodiment 3

[0019] Embodiment 3 catalyst composition is as follows: (preparation method is the same as embodiment 1) Cu20Zr60Mn10Ni10P=12.0MPa, T=300 ℃, GHSV=10000h -1 , H 2 / CO=2, the obtained result is: CO conversion rate hydrocarbon selectivity (%) CO 2 Selectivity (%) Alcohol selectivity (%) Space-time yield g / ml cat hr31.05 1.68 0.68 97.64 1.15

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Abstract

The methanol synthesizing catalyst has the molar composition of: Zr 40-60%, Cu 20-40%, MA 10-20% and Ni 1-30%, where MA is alkali metal, alkali earth metal or transition element(s). During the preparation, zirconium hydroxide and the nitrates of the other elements are dissolved in distilled water to form mixed solution of 5-30 % concentration; coprecipitation with sodium carbonate at 60-90 deg.c while stirring and maintaining pH 9-12; washing the precipitate with distilled water until no chlorine oil; soaking with the citrate, carbonate, oxalate or nitrate of MA to add MA as assistant; dryingat 80-160 deg.c, roasting at 200-750 deg.c and crushing to 20-40 mesh. The catalyst has high mechanical strength and low cost.

Description

Technical field: [0001] The invention belongs to a methanol synthesis catalyst, in particular to a copper-zirconium oxide catalyst modified by an auxiliary agent. Background technique: [0002] Methanol is an important basic chemical raw material. At present, the industrial methanol synthesis catalyst is mainly Cu-Zn-Al catalytic system. Although it has obtained large-scale industrial applications, this catalytic system still has some weaknesses, such as poor heat resistance, and requires 3-12% CO in the process of reduction and reaction. 2 Maintain its catalytic activity, and the operating cost is relatively large. [0003] In order to overcome the shortcomings of industrial methanol synthesis catalysts. In recent years, correspondingly reported some novel methanol catalytic systems (Owen Geoffyey, Hawkes C.M.Lloyd Deborach, Appl.Catal.1987,33:405), thorium-copper intermetallic compound catalyst copper / rare earth oxide (Cu / CeO 2 or Cu / La 2 o 3 ) catalysts, exhibit hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J23/78B01J23/80B01J23/882B01J23/89
Inventor 孙予罕魏伟赵宁徐润马忠义王太英
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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