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Cu-Ti-Si catalyst for synthesis of 1,4-butynediol

A technology of cu-ti-si and butynediol, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of clogging reaction product filter, Catalyst yield reduction, unable to recycle and other problems, to achieve the effect of ensuring catalytic performance, improving stability, and not easy to wear

Active Publication Date: 2019-10-25
XIAN SUNWARD AEROSPACE MATERIAL
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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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  • Cu-Ti-Si catalyst for synthesis of 1,4-butynediol
  • Cu-Ti-Si catalyst for synthesis of 1,4-butynediol
  • Cu-Ti-Si catalyst for synthesis of 1,4-butynediol

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Experimental program
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Embodiment 1

[0028] The Cu-Ti-Si catalyst of this embodiment has a titanium-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:

[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, the Cu(NO 3 ) 2 ·5H 2 O and 33g of Ti(SO 4 ) 2 9H 2 O was added into 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, add the mixed solution obtained in step 2 dropwise to the sodium silicate solution obtained in step 1 for precipitation reaction to obtain a suspension and continue to stir for 4 hours, and then...

Embodiment 2

[0043] The Cu-Ti-Si catalyst of this embodiment has a titanium-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:

[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, the Cu(NO 3 ) 2 ·5H 2 O and 80g of Ti(SO 4 ) 2 9H 2 O was added into 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, add the mixed solution obtained in step 2 dropwise to the sodium silicate solution obtained in step 1 for precipitation reaction to obtain a suspension and continue to stir for 4 hours, and then use 30...

Embodiment 3

[0049] The Cu-Ti-Si catalyst of this embodiment has a titanium-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:

[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 two, the CuCl of 169g 2 2H 2 O and 43g of Ti(SO 4 ) 2 9H 2 O was added into 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, add the mixed solution obtained in step 2 dropwise to the sodium silicate solution obtained in step 1 for precipitation reaction, obtain a suspension and continue stirring for 2 hours, and th...

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Abstract

The invention discloses a Cu-Ti-Si catalyst for synthesis of 1,4-butynediol. The Cu-Ti-Si catalyst is provided with a cupric silicate structure containing titanium, and the preparation process of theCu-Ti-Si catalyst through coprecipitation includes the steps that 1, a soluble salt of Si is added to water and then alcohol is added to obtain a silicon salt solution; 2, a soluble salt of Cu and a soluble salt of Ti are added to a nitric acid solution to obtain a mixed solution; and 3, the mixed solution is dropwise added to the silicon salt solution for reaction to obtain a turbid solution andthe pH is adjusted to 7.0-8.0, still standing is conducted after stirring, and the Cu-Ti-Si catalyst is obtained through filtration, washing, drying and roasting. According to the Cu-Ti-Si catalyst, excessive bonding between silicon oxides is avoided by using alcohol combined with silica oxygen bonds, the Cu-Ti-Si catalyst with the appropriate particle size is obtained, adhesion of the silicon oxides to an active component, namely copper is enhanced, stability of copper ions is improved, thus the catalytic activity of the Cu-Ti-Si catalyst is improved, and the yield and recovery rate of the Cu-Ti-Si catalyst are increased.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a Cu-Ti-Si catalyst for synthesizing 1,4-butynediol. Background technique [0002] At present, the catalysts used in the production of 1,4-butynediol by the alkyne aldehyde method are mainly copper-bismuth catalysts. And the Cu-Bi system catalyst mainly studied at home and abroad. Sun Jiguang mentioned in the article "Use and Maintenance of 1,4-Butanediol Synthesis Catalyst" that adding a small amount of Bi to the 1,4-Butynediol Synthesis Catalyst 2 o 3 Inhibits the production of the polymerization of the alkyne aldehyde reaction process, but also inhibits its catalytic activity, so the use of Bi 2 o 3 Not the best catalyst aid. It is also mentioned in the article that the active phase of the 1,4-butynediol synthesis catalyst is cuprous acetylide, and the general copper catalyst can easily produce zero-valent copper during the reduction process. In the patent with the app...

Claims

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Application Information

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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