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Catalyst for liquid phase hydrogenation, and preparation method and application thereof

A liquid-phase hydrogenation and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, and preparation of hydroxyl compounds. Solve problems such as poor dispersion of active components, and achieve the effects of good catalyst uniformity, improved combination mode, and mild conditions

Pending Publication Date: 2020-09-11
PUJING CHEM IND SHA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the methods to improve the UV transmittance are mainly activated carbon adsorption method, ion exchange resin adsorption method, rectification method, and catalytic hydrogenation method. Among them, the adsorption method and ion exchange method have limited treatment capacity, require a large amount of adsorbent or resin and are easily saturated. , the rectification method does not remove impurities thoroughly, and the catalytic hydrogenation method can remove impurities to a greater extent and improve the external transmittance
Chinese patent CN104945227B discloses a composite catalyst containing Raney nickel, which can increase the ultraviolet transmittance of ethylene glycol, but the catalyst is difficult to prepare and has a high carbonization temperature, which is not conducive to industrial application
Chinese patent CN104043457A discloses a catalyst and method for hydrogenation of oxalate to ethylene glycol, which mainly solves the problems of poor catalyst activity and low ethylene glycol selectivity in the prior art
However, the catalyst preparation method in this patent is to first precipitate the active component, then mechanically mix the active component with the carrier, dry, and roast to obtain the catalyst. The dispersion of the active component on the carrier is poor, and the binding force between the active component and the carrier is weak.

Method used

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  • Catalyst for liquid phase hydrogenation, and preparation method and application thereof
  • Catalyst for liquid phase hydrogenation, and preparation method and application thereof
  • Catalyst for liquid phase hydrogenation, and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0038] The concrete steps of preparation method are as follows:

[0039] (1) Weigh a certain amount of silica sol and / or aluminum sol respectively, add water to dilute to SiO 2 and or Al 2 o 3 The mass concentration is 5-20%;

[0040] (2) Weigh a certain amount of copper / iron / nickel nitrate or acetate, add water to dissolve, and prepare a solution with a concentration of 0.5-2mol / L.

[0041] (3) Weigh a certain amount of surfactant, one or more of polyethylene glycol, polyvinylpyrrolidone, sodium dodecylbenzenesulfonate or cetyltrimethylammonium bromide can be used to add water Dissolve and configure to obtain a solution with a concentration of 5-30g / L. The mass ratio of the added surfactant to the carrier is 1-5:100. Among the above-mentioned surfactants, polyethylene glycol and polyvinylpyrrolidone are mainly used for pore expansion ; Sodium dodecylbenzenesulfonate or cetyltrimethylammonium bromide are used to adjust the binding mode between the active ingredient and the...

Embodiment 1

[0048] Weigh 200g of silica sol with a content of 25%, add water and dilute to 400ml to obtain sol 1; then weigh 9.5g copper nitrate trihydrate and 9.02g copper nitrate nonahydrate, add water to dissolve in 200ml to obtain solution 2; weigh 1g PEG10000, Add water to 100ml and stir to dissolve to obtain solution 3; add solutions 2 and 3 to solution 1 respectively, stir while adding, then adjust the pH to 2.0 with nitric acid, then slowly raise the temperature to 80°C, continue stirring for 1 hour, stop stirring, and Aged for 4 hours, dried in an oven at 120°C after taking it out, and calcined in a muffle furnace at 400°C for 4 hours to obtain a catalyst. The catalyst composition is shown in Example 1 in Table 1.

Embodiment 2

[0051] Weigh 200g of aluminum sol with a content of 25%, add water to dilute to 400ml, and obtain Sol 1; then weigh 2.35g of copper acetate monohydrate and 7.53g of nickel acetate, add water to dissolve in 200ml, and obtain solution 2; weigh 1.5g of PVP k15, Add water to 100ml and stir to dissolve to obtain solution 3; add solutions 2 and 3 to solution 1 respectively, stir while adding, then adjust the pH to 3.5 with nitric acid, then slowly raise the temperature to 70°C, continue stirring for 1 hour, then stop stirring, and Aged for 4 hours, dried in an oven at 120°C after taking it out, and calcined in a muffle furnace at 450°C for 4 hours to obtain a catalyst. Catalyst composition see Example 2 in Table 1.

[0052] Catalyst evaluation uses a fixed bed hydrogenation reactor, the catalyst is loaded with 10.0g, the upper and lower sides of the catalyst bed are filled with quartz sand, and the catalyst is reduced with hydrazine hydrate before use. The hydrazine hydrate is pump...

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Abstract

The invention relates to a catalyst for liquid phase hydrogenation, and a preparation method and application thereof. The catalyst comprises a catalyst carrier and an active component loaded on the catalyst carrier, the active component is selected from one or more of copper, iron and nickel, the loading capacity of the active component on the catalyst carrier is 10-40 wt%, the catalyst carrier isan alumina carrier, a silicon oxide carrier or a silicon-aluminum composite carrier, and the catalyst is prepared by a sol-gel method. The catalyst is applied to a liquid-phase online reduction reaction, the reduction condition is mild, the reaction condition is mild, and the ultraviolet transmittance of ethylene glycol can be greatly improved.

Description

technical field [0001] The invention relates to the field of liquid-phase hydrogenation, in particular to a catalyst for liquid-phase hydrogenation and its preparation method and application. Background technique [0002] Ethylene glycol is an important organic chemical raw material, mainly used to produce antifreeze and polyester resin, and also used to produce lubricants, explosives, plasticizers, nonionic surfactants and unsaturated polyester resins, etc., so Has a wide range of applications. At present, the main consumption field of ethylene glycol in my country is the production of polyester resin, accounting for 94.0% of the total domestic consumption. [0003] When ethylene glycol is used to produce polyester fibers, its quality will have a great impact on downstream products. In addition to the purity of ethylene glycol, the index for judging quality also includes ultraviolet transmittance, which can sensitively reflect the content of impurities in ethylene glycol ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J23/745B01J23/755B01J35/10B01J37/00B01J37/16C07C29/149C07C31/20
CPCB01J37/0018B01J37/16B01J23/745B01J23/755B01J23/72C07C29/149B01J35/633B01J35/635B01J35/647B01J35/615C07C31/202Y02P20/52
Inventor 陈长军骆念军钱宏义郑赛男欧进永
Owner PUJING CHEM IND SHA
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