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Hydrogenation catalyst and preparation method and application thereof

A hydrogenation catalyst and catalyst technology are applied in catalytic reactions, chemical instruments and methods, preparation of organic compounds, etc., to achieve the effects of improving catalytic activity, increasing loading rate, and high reaction activity

Active Publication Date: 2022-03-01
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problem existing in the above method is the lack of an efficient hydrogenation catalyst with high conversion rate and high selectivity, so the development of an efficient hydrogenation catalyst for this reaction has become the key to the application of this process

Method used

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  • Hydrogenation catalyst and preparation method and application thereof
  • Hydrogenation catalyst and preparation method and application thereof
  • Hydrogenation catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Hydrogenation catalyst preparation:

[0050]a. 200g chloromethylated polystyrene resin, 10g dibasic ether alcohol (I), 1000g toluene, 100g 20wt% sodium hydroxide aqueous solution were mixed and then refluxed and stirred for 3 hours, cooled to room temperature and suction filtered, and deionized Washed 3 times with water until there is no chloride ion, heated and dried at 70°C for 5 hours under 10KPa vacuum to obtain hydrogenation catalyst precursor B1.

[0051] b. Mix 200g of catalyst precursor B1, 4g of cerium chloride, 4g of bistrifluoromethanesulfonyl imide, 40g of cesium carbonate and 1200g of dichloromethane, then reflux and stir for 2 hours, cool to room temperature and filter with deionized Wash with water three times, heat and dry at 80°C for 6 hours under 20KPa vacuum to obtain hydrogenation catalyst a.

[0052]

[0053] (2) Catalyst activity evaluation:

[0054] Add 80g of 1,4-diacetoxybutene, 200g of xylene, and 10g of the above-mentioned catalyst in...

Embodiment 2-4

[0057] The preparation and activity evaluation of the hydrogenation catalyst were carried out according to the steps of Example 1, and the corresponding preparation parameters and activity evaluation results are shown in Tables 1-3.

[0058] Table 1 Catalyst precursor B preparation conditions

[0059]

[0060] Table 2 catalyst preparation conditions

[0061]

[0062] Table 3 Catalyst b-d catalytic activity evaluation

[0063]

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Abstract

The invention provides a hydrogenation catalyst as well as a preparation method and application thereof. The catalyst has high conversion rate and high selectivity, and is used for synthesis of 1, 4-diacetoxybutane. The catalyst provided by the invention is polystyrene resin immobilized alcohol-cerium chelating ionic liquid taking Ce as an active center. The catalyst can catalyze hydrogenation of 1, 4-diacetoxybutene at a low temperature and a low pressure with high conversion rate and high selectivity to generate 1, 4-diacetoxybutane, and the catalytic effect is significantly superior to that of a traditional hydrogenation catalyst. Besides, the preparation method of the catalyst is simple, Ce metal is immobilized by adopting a coordination chelation method, the loading rate and the loading uniformity are high, meanwhile, the catalyst is easy to separate, recover and reuse, and the production cost can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation and application, and in particular relates to a hydrogenation catalyst and its preparation method and application. Background technique [0002] 1,4-butanediol, also known as 1,4-dihydroxybutane, or 1,4-BDO for short. 1,4-BDO is an important basic organic chemical and fine chemical raw material. Diether alcohol (PTMEG), γ-butyrolactone (GBL), polyurethane, polyester, etc. In particular, 1,4-BDO can be used to produce mainstream degradable plastics polybutylene succinate (PBS) and polybutylene terephthalate adipate (PBAT), which can be used in garbage bags, food Bags, various bottles, labels, disposable packaging supplies, etc. [0003] 1,4-BDO has achieved industrial production mainly through four process routes: (1) Reppe method using formaldehyde and acetylene as raw materials; (2) Propylene method using propylene as starting raw material; (3) Using n-butane / Maleic anhydride is...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J31/02C07C67/283C07C69/16
CPCB01J31/2213B01J31/0297C07C67/283B01J2531/38B01J2531/0213B01J2231/645C07C69/16
Inventor 车传亮桂振友郭云峰董菁张永振王磊
Owner WANHUA CHEM GRP CO LTD
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