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A kind of catalyst for catalyzing hydroxyaldehyde hydrogenation to prepare polyol and its preparation and application method

An application method and hydroxy aldehyde technology, applied in catalyst activation/preparation, chemical instruments and methods, hydroxy compound preparation, etc., can solve problems such as environmental hazards, achieve the effects of less Cu content, inhibit side reactions, and reduce production costs

Active Publication Date: 2022-07-15
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the copper chromium catalyst used in it will cause great harm to the environment

Method used

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  • A kind of catalyst for catalyzing hydroxyaldehyde hydrogenation to prepare polyol and its preparation and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Weigh 2.18g (9mmol, containing Cu 0.58g) Cu(NO 3 ) 2 ·3H 2 O and 5.35 g (18 mmol) Zn(NO 3 ) 2 ·6H 2 0, and dissolve the two in 30 mL of deionized water;

[0043] (2) take by weighing trimesic acid (H 3 BTC) (5 mmol, 1.1 g), and dissolved in 30 mL of absolute ethanol;

[0044] (3) Weigh 6g of 40-60 mesh molded SiO 2 ;

[0045] (4) Mix the solutions obtained in steps (1) and (2) to obtain a suspension, and shape the SiO 2 added to the suspension;

[0046] (5) transfer the obtained mixture of step (4) to the crystallization kettle lined with polytetrafluoroethylene, and react at 150 ° C for 6 hours;

[0047] (6) the reaction mixture was taken out from the crystallization kettle, centrifuged, and the solid obtained was washed with deionized water, and then dried at 80° C. for 12 hours;

[0048] (7) the solid that step (6) obtains is put into the tube furnace, in N 2 In the atmosphere, calcined at 400 °C for 5 hours to obtain molded SiO 2 Supported CuZn@C ca...

Embodiment 2-4

[0050] The preparation method is the same as that of Example 1, except that the Cu-containing precursor compound and the consumption in step (1) are changed to be 1.44g copper sulfate, 1.21g copper chloride and 1.80g copper acetate monohydrate, respectively, to obtain Example 2- 4 CuZn@C / SiO 2 catalyst.

[0051] The CuZn@C / SiO prepared in Examples 1-4 was 2 The catalyst is used for the hydrogenation of hydroxyaldehyde to polyol reaction: 20ml of catalyst is loaded into a stainless steel tubular reactor with an inner diameter of 20mm, the reaction raw material is an ethylbenzene solution of hydroxyaldehyde, the concentration of hydroxyaldehyde is 10wt%, and the reaction conditions are as follows: mol of hydrogen ketone Ratio 10:1, liquid hourly space velocity 0.4g (hydroxy aldehyde) g (catalyst) -1 ·h -1 , the reaction temperature is 80 °C, and the reaction pressure is 2.5 MPa. Under these conditions, the hydroxyaldehyde hydrogenation reaction is carried out to obtain a poly...

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Abstract

A catalyst for hydrogenation of hydroxyaldehyde to prepare polyol reaction and its preparation method and application method. The catalyst composition includes carrier-shaped SiO 2 and active component Cu compound, and auxiliary Zn compound; wherein, Cu and SiO in the Cu compound 2 The weight ratio of Cu compound is 2-10:100; the material ratio of Cu in the Cu compound to Zn in the Zn compound is 1:0.5-6. The heterogeneously formed SiO 2 The preparation method of the supported CuZn@C catalyst is simple, easy to operate, and has high repeatability; the catalyst has high activity, good stability, long life, high selectivity, and can significantly suppress side reactions in the reaction process.

Description

technical field [0001] The present invention relates to a kind of heterogeneous Cu series catalyst and preparation and application method thereof, in particular, relate to a kind of catalyst for catalyzing the addition of hydroxyaldehyde (eg, hydroxypivalaldehyde, 2,2-dimethylolbutyraldehyde). Heterogeneous forming of SiO from hydrogen to polyols 2 Supported CuZn@C catalyst and preparation method thereof. Background technique [0002] Polyol is an important chemical intermediate, which has a wide range of applications in the fields of alkyd resin, polyester resin, explosives and other industrial products, as well as synthetic drying oils, adhesives, plasticizers, surfactants and other fields. The synthesis methods of polyols include microbial fermentation and organic synthesis. The microbial fermentation method generally uses organic amino acids or proteins as raw materials, and produces polyols through microbial fermentation. The raw materials used in the method are expe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80B01J37/08B01J37/10C07C29/141C07C31/20C07C31/22
CPCB01J23/80B01J37/10B01J37/086C07C29/141C07C31/20C07C31/22
Inventor 吕建华刘继东薛伟
Owner HEBEI UNIV OF TECH
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