A kind of catalyst for preparing cumene and its preparation and application

A catalyst and a technology for cumene, applied in the field of catalysts for preparing cumene, can solve the problems of low catalyst activity and selectivity, poor stability, environmental pollution, etc., so as to avoid the growth of metal crystal grains and improve the hydrogenation activity. and stability, the effect of suppressing local overheating

Active Publication Date: 2022-04-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the technical problems of low catalyst activity and selectivity, poor stability, and serious environmental pollution existing in the prior art, the present invention provides a high activity, high selectivity supported palladium catalyst, which has excellent catalytic Activity and selectivity, excellent stability

Method used

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  • A kind of catalyst for preparing cumene and its preparation and application
  • A kind of catalyst for preparing cumene and its preparation and application
  • A kind of catalyst for preparing cumene and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] 1. Catalyst preparation

[0083] Mix 1 liter of alumina with 600 grams of phosphoric acid aqueous solution containing 8.0 grams of P, dry at 110°C for 8 hours, and calcinate at 400°C for 4 hours to obtain a catalyst carrier.

[0084] Mix 1 liter of the above-mentioned support with 2000 g of aqueous chloropalladium acid solution containing 3.0 g of palladium, dry at 110° C. for 8 hours, and roast at 500° C. for 4 hours to obtain the oxidized palladium-based catalyst precursor I. The above-mentioned oxidized palladium-based catalyst precursor I was reduced with hydrogen for 4 hours, the reduction temperature was 250°C, and the hydrogen volume space velocity was 100 hours -1 , to obtain a palladium-based catalyst, the main composition and properties of the catalyst are shown in Table 2 and Table 3.

[0085] 2. Catalyst evaluation

[0086] The hydrogenation operation is carried out in a fixed-bed reactor, and the catalyst prepared above is filled in the reactor, and the h...

Embodiment 2

[0095] 1. Catalyst preparation

[0096] Mix 1 liter of alumina with 600 grams of phosphoric acid aqueous solution containing 8.0 grams of P, dry at 110°C for 8 hours, and calcinate at 400°C for 4 hours to obtain a catalyst carrier.

[0097] Mix 1 liter of the above carrier with 2,000 grams of chloropalladic acid-copper nitrate aqueous solution containing 3.0 grams of palladium and 1.0 grams of copper, dry at 110°C for 8 hours, and roast at 500°C for 4 hours to obtain the oxidized state palladium-based catalyst precursor I .

[0098] The above-mentioned oxidized palladium-based catalyst precursor I was reduced with hydrogen for 4 hours, the reduction temperature was 250°C, and the hydrogen volume space velocity was 100 hours -1 , to obtain a palladium-based catalyst.

[0099] The main composition and properties of the catalyst are shown in Table 2 and Table 3.

[0100] 2. Catalyst evaluation

[0101] The hydrogenation operation is carried out in a fixed-bed reactor, and the...

Embodiment 3

[0110] 1. Catalyst preparation

[0111] Mix 1 liter of alumina with 600 grams of phosphoric acid aqueous solution containing P27 grams, dry at 110°C for 8 hours, and roast at 400°C for 4 hours to obtain a catalyst carrier.

[0112] Mix 1 liter of the above carrier with 2,000 grams of chloropalladic acid-copper nitrate aqueous solution containing 3.0 grams of palladium and 1.0 grams of copper, dry at 110°C for 8 hours, and roast at 500°C for 4 hours to obtain the oxidized state palladium-based catalyst precursor I .

[0113] The above-mentioned oxidized palladium-based catalyst precursor I was reduced with hydrogen for 4 hours, the reduction temperature was 250°C, and the hydrogen volume space velocity was 100 hours -1 , to obtain a palladium-based catalyst.

[0114] The main composition and properties of the catalyst are shown in Table 2 and Table 3.

[0115] 2. Catalyst evaluation

[0116] The hydrogenation operation is carried out in a fixed-bed reactor, and the catalyst...

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Abstract

The invention provides a catalyst for preparing cumene and its preparation and application. The catalyst includes a carrier and an active component loaded on the carrier, and the carrier includes a carrier substrate and an improved compound loaded on the carrier substrate. Auxiliary component, wherein, the active component includes metal palladium and / or its oxide, and the modified auxiliary component is phosphorus and / or its oxide; Optionally, the active component also includes metal Copper and / or its oxides, the catalyst also includes sulfur-containing compounds. When the catalyst described in the present invention is used for the preparation of cumene, it can better suppress the local overheating of the catalyst due to the higher initial activity of the catalyst, avoiding the growth of metal grains and the excessive hydrogenation of cumene to isopropyl Cyclohexane effectively controls the generation of cumene, and increases the selectivity of cumene while obviously improving the stability of the catalyst operation.

Description

technical field [0001] The invention relates to a catalyst for preparing cumene, in particular to a catalyst for preparing cumene by dehydration and hydrogenation of α,α-dimethylbenzyl alcohol. Background technique [0002] Propylene oxide (PO) is an important organic chemical raw material, mainly used in the production of polyether polyols, propylene glycol, propylene glycol ether, etc., of which polyether polyols account for about 70% of the consumption. At present, the commercial production methods of PO mainly include chlorohydrin method, co-oxidation method (PO / SM) and cumene peroxide cycle method (CHP). The CHP process has the following advantages: the conversion rate and selectivity of the whole process are very high; the product is only PO, which is not affected by the price fluctuation of by-product styrene, and can bring more stable economic benefits to the manufacturer; the process is relatively simple, The fixed investment is 1 / 3 lower than that of the PO / SM met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/16B01J23/44B01J23/89B01J27/045B01J35/10C07C1/22C07C15/085
CPCB01J27/16B01J23/44B01J23/8926B01J27/045B01J23/892B01J35/1019B01J35/1061B01J35/0066C07C1/22C07C2527/16C07C2523/44C07C2523/89C07C2527/045C07C15/085Y02P20/52
Inventor 刘仲能赵多马文迪吕宇皓顾国耀
Owner CHINA PETROLEUM & CHEM CORP
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