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Catalyst for preparing isopropylbenzene as well as preparation and application of catalyst

A technology of catalyst and cumene, which is applied in the field of catalysts for preparing cumene, and can solve problems such as poor stability, low catalyst activity and selectivity, and environmental pollution

Active Publication Date: 2021-03-30
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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  • Catalyst for preparing isopropylbenzene as well as preparation and application of catalyst
  • Catalyst for preparing isopropylbenzene as well as preparation and application of catalyst
  • Catalyst for preparing isopropylbenzene as well as preparation and application of catalyst

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 isopropylbenzene as well as preparation and application of the catalyst. The catalyst comprises a carrier and an active component loaded on the carrier,the carrier comprises a carrier matrix and a modification auxiliary component loaded on the carrier matrix, the active component comprises metal palladium and / or oxide thereof, and the modification auxiliary component is phosphorus and / or an oxide thereof; and optionally, the active component further comprises metal copper and / or oxide thereof, and the catalyst further comprises a sulfur-containing compound. When the catalyst is used for preparing isopropylbenzene, local overheating of the catalyst caused by high initial activity of the catalyst can be well inhibited, metal crystal grain growth and excessive hydrogenation of isopropylbenzene to isopropylcyclohexane are avoided, generation of isopropylbenzene is effectively controlled, the operation stability of the catalyst is obviously improved, and meanwhile, the isopropylbenzene selectivity is improved.

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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IPC IPC(8): B01J27/16B01J23/44B01J23/89B01J27/045B01J35/10C07C1/22C07C15/085
CPCB01J27/16B01J23/44B01J23/8926B01J27/045B01J23/892C07C1/22C07C2527/16C07C2523/44C07C2523/89C07C2527/045B01J35/394B01J35/615B01J35/647C07C15/085Y02P20/52
Inventor 刘仲能赵多马文迪吕宇皓顾国耀
Owner CHINA PETROLEUM & CHEM CORP
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