Preparation method of copper-chromium catalyst

A catalyst and copper-chromium technology, which is applied in the field of preparation of copper-chromium catalysts, can solve the problems of wear, damage, and easy fragmentation of tablet presses and upper and lower punching pins, so as to reduce the wear and tear of the machine body, suppress by-products, and improve the selective effect

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the molding process of Cu-Cr catalyst, even if graphite is added as a molding aid, it is also prone to fragmentation. At the same time, in order to obtain higher strength (greater tha

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 100g Cu-Cr powder (100 mesh, Cu / Cr molar ratio is 0.9:1), add 0.5g phenolic resin (-100 mesh) and mix evenly, add 0.5g flake graphite (100 mesh), mix evenly, and press Tablet operation, the particle size of the tablet molding is 3~6mm, and the tableting strength is controlled to be greater than 50N / granule. Detect 20 grains, calculate the average intensity, and the data are shown in Table 6.

[0030] The prepared tablet was put into a high-temperature resistance furnace, the heating rate was controlled at 3°C / min, the firing temperature was 200°C, and the firing time was 5h. Detect the strength of 20 burnt particles and calculate the average value. The data are shown in Table 6.

Embodiment 2~4

[0032] The compressed tablet prepared in Example 1 was put into a high-temperature resistance furnace, and the heating rate was controlled at 3° C. / min. The roasting method was as follows. After roasting, the strength of 20 roasted particles was detected, and the average value was calculated. The data are shown in Table 6.

[0033] project Example 2 Example 3 Example 4 Calcination temperature, ℃ 200 300 300 Roasting time, h 10 5 10

Embodiment 5

[0035] 100g Cu-Cr powder (100 mesh, Cu / Cr molar ratio is 1:1), add 4g phenolic resin (-100 mesh) and mix evenly, add 4g flake graphite (100 mesh), mix evenly, and perform tabletting operation , the particle size of the tablet molding is 3~6mm, and the tableting strength is controlled to be greater than 50N / granule. Detect 20 grains, calculate the average intensity, and the data are shown in Table 6.

[0036] The prepared tablet was put into a high-temperature resistance furnace, the heating rate was controlled at 3°C / min, the firing temperature was 200°C, and the firing time was 5h. Detect the strength of 20 burnt particles and calculate the average value. The data are shown in Table 6.

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PUM

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Abstract

The invention discloses a preparation method of a copper-chromium catalyst. The preparation method comprises the following steps: preparing Cu-Cr powder, then mixing graphite and thermosetting and/or thermoplastic resin with the Cu-Cr powder, pressing into sheets, forming, and finally burning so as to obtain the copper-chromium catalyst. The preparation method has the advantages of easy forming and high catalytic strength of the obtained catalyst, and moreover, the catalytic property of the catalyst is basically not influenced by the forming at the same time.

Description

technical field [0001] The invention relates to a preparation method of a copper-chromium catalyst. The catalyst is mainly used for the hydrogenation of esters to produce alcohols, especially for the technology of hydrogenating dimethyl maleate to produce 1,4-butanediol, and also for the preparation of other low-level and high-level alcohols. Background technique [0002] US2079414 discloses a copper-based catalyst for hydrogenation of esters to alcohols, followed by the disclosure of many patents on ester hydrogenation catalysts, including US 3787334, US 3899446 and so on. Such catalysts are mainly Cu-Cr catalysts. [0003] The Cu-Cr catalyst can be used in other processes, such as CN1136979A disclosed in the low-temperature liquid-phase synthesis of methanol and methyl formate production process, in this patent, the Cu / Cr molar ratio is controlled to measure at 0.6-1.4, and the obtained filter cake is dried, in N 2 It is thermally decomposed at 300-350°C for 2-5 hours, ...

Claims

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Application Information

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IPC IPC(8): B01J23/86C07C29/149C07C31/20
Inventor 高鹏付秋红张艳侠包洪洲段日
Owner CHINA PETROLEUM & CHEM CORP
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