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A kind of dimethyl benzyl alcohol hydrogenolysis catalyst and preparation method thereof

A technology of dimethylbenzyl alcohol and catalyst, applied in the field of catalysis, can solve the problems of poor cumene selectivity, high catalyst cost, poor selectivity, etc., and achieves high thermal stability and mechanical stability, excellent activity and selectivity, The effect of unobstructed catalyst pores

Active Publication Date: 2022-03-11
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] When noble metal catalysts and nickel-based catalysts are used in the hydrogenolysis reaction of dimethyl benzyl alcohol, there are disadvantages such as high catalyst cost, saturation of aromatic rings, and poor selectivity of cumene; conventional copper-based catalysts have low activity, poor selectivity, and easy Disadvantages such as sintering and poor liquid resistance of the catalyst
[0015] At present, the catalysts prepared by the prior art have the problems of high catalyst cost, low activity, poor selectivity / poor high temperature stability / poor liquid resistance and serious environmental pollution when used for catalytic hydrogenolysis of dimethyl benzyl alcohol to prepare cumene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) Add 500g of water, 1.85g of maltose and 40.12g of SAPO-11 molecular sieve into the reaction kettle and stir evenly.

[0066] (2) 243.0g copper nitrate (Cu(NO 3 ) 2 ·3H 2 O, 242), 123.5g 50wt% manganese nitrate solution (Mn(NO 3 ) 2 , 179) and 25.4g magnesium nitrate (Mg(NO 3 ) 2 ·6H 2 (2,256) was dissolved in 966.7g of water to prepare a mixed salt solution, and the preparation concentration was an aqueous solution of sodium carbonate of 15wt%, and the above two solutions were heated to 65° C. and then added dropwise to the aforementioned reaction kettle in parallel, and the dropping time was 60 minutes. , the temperature of the precipitation process is controlled at 65°C, and the pH value of the precipitation process is 7.0 (wherein, according to the pH value of the precipitation process, the amount of sodium carbonate aqueous solution is controlled to be 105% of the theoretically required amount for the metal particles to completely precipitate), and then ag...

Embodiment 2

[0075] (1) Add 500g of water, 3.00g of sucrose and 30.0g of SAPO-11 molecular sieve into the reaction kettle and stir evenly.

[0076] (2) 255.4g copper nitrate (Cu(NO 3 ) 2 ·3H 2 O, 242), 82.3g 50wt% manganese nitrate solution (Mn(NO 3 ) 2 , 179) and 101.8g magnesium nitrate (Mg(NO 3 ) 2 ·6H 2 (2,256) was dissolved in 1122.9g water to prepare mixed salt solution, the preparation concentration was 15wt% sodium carbonate aqueous solution, the above-mentioned two kinds of solutions were heated to 70° C. and then added dropwise to the aforementioned reaction kettle in parallel, and the dropping time was 60min , the temperature of the precipitation process is controlled at 70°C, and the pH value of the precipitation process is 7.0 (wherein, according to the pH value of the precipitation process, the amount of sodium carbonate aqueous solution is controlled to be 105% of the theoretically required amount to completely precipitate the metal particles), and then aged at 75°C fo...

Embodiment 3

[0083] (1) Add 500g of water, 5.83g of sucrose and 39.68g of SAPO-11 molecular sieve into the reactor and stir evenly.

[0084] (2) 212.6g copper nitrate (Cu(NO 3 ) 2 ·3H 2 O, 242), 115.3g 50wt% manganese nitrate solution (Mn(NO 3 ) 2 , 179) and 50.9g magnesium nitrate (Mg(NO 3 ) 2 ·6H 2 (2,256) was dissolved in 933.7g of water to prepare a mixed salt solution, and the preparation concentration was an aqueous solution of sodium carbonate of 15wt%, and the above two solutions were heated to 70° C. and then added dropwise to the aforementioned reaction kettle in parallel, and the dropping time was 40 minutes. , control the temperature of the precipitation process to 70°C, and the pH value of the precipitation process to be 7.0 (wherein, according to the pH value of the precipitation process, the amount of sodium carbonate aqueous solution is controlled to be 105% of the theoretically required amount to completely precipitate the metal particles), and then aged at 80°C for ...

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Abstract

The invention discloses a dimethyl benzyl alcohol hydrogenolysis catalyst and a preparation method thereof. The catalyst comprises: CuO 30‑70wt%, MnO 2 5‑30wt%, MgO 0.5‑15wt%, SAPO‑11 molecular sieve 10‑50wt%, SiO 2 10‑40wt%, PdO 0.01‑0.5wt%, PtO 2 0.01‑0.5%, WO 3 0.05-2.0 wt%. When the catalyst is used for hydrogenolysis of dimethyl benzyl alcohol to prepare cumene, it not only has excellent activity and selectivity, but also has low cost, good liquid resistance and high mechanical stability.

Description

technical field [0001] The invention relates to a dimethyl benzyl alcohol hydrogenolysis catalyst and a preparation method thereof, belonging to the technical field of catalysis. Background technique [0002] The industrial production methods of propylene oxide (PO) mainly include chlorohydrin method, hydrogen peroxide direct oxidation method and co-oxidation method (Halcon method). The chlorohydrin method is currently the main route for the domestic production of PO. This process has serious problems such as equipment corrosion and environmental pollution. Due to the high raw material cost of the direct hydrogen peroxide oxidation route, the economy is affected. [0003] The co-oxidation method, also known as co-production method or indirect oxidation method, is to generate propylene oxide through the reaction of organic peroxide and propylene, and by-product organic alcohol. Although the traditional isobutane co-oxidation method and ethylbenzene co-oxidation method avoid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85C07C15/085C07C1/20B01J37/03B01J37/08B01J37/02
CPCB01J29/85C07C1/20B01J37/08B01J37/031B01J37/0201B01J2229/186C07C15/085Y02P20/52
Inventor 李作金杨栋琳王雷雷詹吉山沙宇于海波孙康黎源
Owner WANHUA CHEM GRP CO LTD
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