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A cu-ti-si catalyst for the synthesis of 1,4-butynediol

A cu-ti-si, butynediol technology, applied in catalyst activation/preparation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of clogging reaction product filters, The catalyst yield is reduced and cannot be recovered, so as to ensure the catalytic performance, improve the stability, and be less prone to wear and tear.

Active Publication Date: 2022-07-05
XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The crushing process will inevitably produce too fine catalyst powder, which will block the filter of the reaction product during use and cannot be recovered
Therefore, the too fine catalyst powder produced in the pulverization process is directly scrapped, resulting in waste, and the yield of the catalyst is reduced.

Method used

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  • A cu-ti-si catalyst for the synthesis of 1,4-butynediol
  • A cu-ti-si catalyst for the synthesis of 1,4-butynediol
  • A cu-ti-si catalyst for the synthesis of 1,4-butynediol

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Effect test

Embodiment 1

[0028] The Cu-Ti-Si catalyst of the present embodiment has a titanate-containing copper silicate structure, and the Cu-Ti-Si catalyst is prepared by a co-precipitation method. The specific process of the preparation method is as follows:

[0029] Step 1. Add 240g of sodium metasilicate nonahydrate to 1250mL of distilled water, and add 200mL of absolute ethanol and stir until dissolved to obtain a colorless and transparent sodium silicate solution;

[0030] Step 2, put 202g of Cu(NO 3 ) 2 ·5H 2 O and 33 g of Ti(SO 4 ) 2 ·9H 2 O was added to the nitric acid solution and stirred until dissolved to obtain a mixed solution; the nitric acid solution was prepared by dissolving 15 mL of concentrated nitric acid solution with a mass concentration of 65% in 245 mL of water;

[0031]Step 3. Under stirring conditions, drop the mixed solution obtained in step 2 into the sodium silicate solution obtained in step 1 to carry out precipitation reaction to obtain a suspension liquid and co...

Embodiment 2

[0043] The Cu-Ti-Si catalyst of the present embodiment has a titanate-containing copper silicate structure, and the Cu-Ti-Si catalyst is prepared by a co-precipitation method. The specific process of the preparation method is as follows:

[0044] Step 1. Add 240g of sodium metasilicate nonahydrate to 1250mL of distilled water, and add 100mL of methanol and stir until dissolved to obtain a colorless and transparent sodium silicate solution;

[0045] Step 2, put 240g of Cu(NO 3 ) 2 ·5H 2 O and 80 g of Ti (SO 4 ) 2 ·9H 2 O was added to the nitric acid solution and stirred until dissolved to obtain a mixed solution; the nitric acid solution was prepared by dissolving 15 mL of concentrated nitric acid solution with a mass concentration of 65% in 245 mL of water;

[0046] Step 3. Under stirring conditions, drop the mixed solution obtained in step 2 into the sodium silicate solution obtained in step 1 to carry out precipitation reaction to obtain a suspension liquid and continue...

Embodiment 3

[0049] The Cu-Ti-Si catalyst of the present embodiment has a titanate-containing copper silicate structure, and the Cu-Ti-Si catalyst is prepared by a co-precipitation method. The specific process of the preparation method is as follows:

[0050] Step 1. Add 240g of sodium metasilicate nonahydrate to 1250mL of distilled water, and add 200mL of ethylene glycol and stir until dissolved to obtain a colorless and transparent sodium silicate solution;

[0051] Step 2, put 169g of CuCl 2 ·2H 2 O and 43 g of Ti(SO 4 ) 2 ·9H 2 O was added to the nitric acid solution and stirred until dissolved to obtain a mixed solution; the nitric acid solution was prepared by dissolving 15 mL of concentrated nitric acid solution with a mass concentration of 65% in 245 mL of water;

[0052] Step 3. Under stirring conditions, drop the mixed solution obtained in step 2 into the sodium silicate solution obtained in step 1 to carry out a precipitation reaction to obtain a suspension liquid and contin...

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Abstract

The invention discloses a Cu-Ti-Si catalyst for synthesizing 1,4-butynediol. The Cu-Ti-Si catalyst has a titanium-containing copper silicate structure. The preparation process of the co-precipitation method is as follows: 1. Si The soluble salt of Cu is added to the water and then alcohol is added to obtain the silicon salt solution; 2. The soluble salt of Cu and the soluble salt of Ti are added to the nitric acid solution to obtain a mixed solution; 3. The mixed solution is added dropwise to the silicon salt solution to react The pH of the suspension liquid is adjusted to 7.0-8.0, and after stirring, it is left to stand, filtered, washed, dried and calcined to obtain a Cu-Ti-Si catalyst. The present invention utilizes alcohol and silicon-oxygen bonding to avoid excessive bonding between silicon oxides, obtains a Cu-Ti-Si catalyst with suitable particle size, enhances the bonding force between silicon oxides and active component copper, and improves copper ions The stability of the Cu-Ti-Si catalyst improves the catalytic activity, yield and recovery rate of the Cu-Ti-Si catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a Cu-Ti-Si catalyst for synthesizing 1,4-butynediol. Background technique [0002] The catalysts currently used for the production of 1,4-butynediol by the acetylenic process are mainly copper-bismuth catalysts. And the main research at home and abroad Cu-Bi system catalyst. Sun Jiguang mentioned in the article "Use and Maintenance of 1,4-Butanediol Synthesis Catalyst" that a trace amount of Bi is added to the 1,4-butynediol synthesis catalyst. 2 O 3 Suppressed the production of the polymerization in the acetylenic reaction process, but also inhibited its catalytic activity, so the use of Bi 2 O 3 Not the best catalyst promoter. The article also mentioned that the active phase of the 1,4-butynediol synthesis catalyst is cuprous acetylene, and the reduction process of general copper catalysts is very easy to produce zero-valent copper. In the patent with the ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J37/03C07C29/42C07C33/046
CPCB01J23/72B01J37/03C07C29/42C07C33/046
Inventor 封超徐成华彭东侯亚楠赵少丹卫冰王国妮
Owner XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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