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Catalyst for hydrogenation to prepare isopropyl benzene

A catalyst, cumene technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve problems such as low cumene selectivity, and achieve high Active and selective, good effect

Active Publication Date: 2018-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by this invention is to solve the problem of the low selectivity of the AMS conversion rate and cumene of the prior art catalyst, and provide a catalyst for hydrogenation to prepare cumene, which has the AMS conversion rate and isopropyl benzene Propylene has high selectivity

Method used

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  • Catalyst for hydrogenation to prepare isopropyl benzene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1. Catalyst preparation

[0051] A cylindrical alumina carrier with a length of 5mm and a diameter of 2mm (specific surface is 125 meters) 2 / G, pore volume 0.46ml / g) 1L, mixed with 500ml of calcium nitrate aqueous solution containing 0.30g of Ca, dried at 80°C for 4 hours, calcined at 450°C for 4 hours, and then combined with palladium chloride containing 2.7g of Pd with hydrochloric acid Mix 500 ml of the aqueous solution adjusted to pH=3, dry at 80°C for 4 hours, and calcinate at 450°C for 4 hours to obtain the desired catalyst (Pd content: 2.7 g / l, Ca content: 0.30 g / l).

[0052] 2. Catalyst evaluation

[0053] Take 40ml of catalyst and fill it in a fixed bed reactor, activate it at 50°C for 4 hours in a hydrogen atmosphere of 0.4MPa, and then proceed to react. The reaction conditions are as follows: the reaction temperature is 45°C, the reaction pressure is 0.3MPa, the molar ratio of hydrogen to AMS in the reaction raw materials is 1.2, and the liquid space velocity of t...

Embodiment 2

[0056] 1. Catalyst preparation

[0057] A cylindrical alumina carrier with a length of 5mm and a diameter of 2mm (specific surface is 125 meters) 2 / G, pore volume 0.46ml / g) 1L, mixed with 500ml of ammonium molybdate aqueous solution containing 0.30g of Mo, dried at 80°C for 4 hours, calcined at 450°C for 4 hours, and then used together with palladium chloride containing 2.7g of Pd Mix 500 ml of an aqueous solution adjusted to pH=3 with hydrochloric acid, dry at 80°C for 4 hours, and calcinate at 450°C for 4 hours to obtain the desired catalyst (Pd content: 2.7 g / l, Mo content: 0.30 g / l).

[0058] 2. Catalyst evaluation

[0059] See Example 1 for the catalyst evaluation method.

[0060] For the convenience of comparison, the composition and evaluation results of the catalyst are listed in Table 1.

Embodiment 3

[0062] 1. Catalyst preparation

[0063] A cylindrical alumina carrier with a length of 5mm and a diameter of 2mm (specific surface is 125 meters) 2 / G, pore volume 0.46ml / g) 1L, mixed with calcium nitrate containing 0.24g Ca and 500ml ammonium molybdate aqueous solution containing 0.06g Mo, dried at 80°C for 4 hours, calcined at 450°C for 4 hours, and then mixed with 2.7 g of Pd palladium chloride and 500 ml of an aqueous solution adjusted to pH=3 with hydrochloric acid were mixed, dried at 80°C for 4 hours, and calcined at 450°C for 4 hours to obtain the required catalyst (Pd content of 2.7 g / L, Ca content of 0.24 G / L, the Mo content is 0.06 g / L).

[0064] 2. Catalyst evaluation

[0065] See Example 1 for the catalyst evaluation method.

[0066] For the convenience of comparison, the composition and evaluation results of the catalyst are listed in Table 1.

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Abstract

The invention relates to a catalyst for hydrogenation to prepare isopropyl benzene to mainly solve the technical problems of a low AMS conversion rate of catalysts and low selectivity of isopropyl benzene in the prior art. The adopted catalyst for the hydrogenation to prepare isopropyl benzene comprises a carrier and active components, and the active components include 0.01-10 g / L of metallic palladium or an oxide thereof and 0-60 g / L of alkaline earth metal or an oxide thereof. The technical scheme solves the technical problems well and can be used in a hydrogenation reaction of alpha-methylstyrene to prepare isopropyl benzene.

Description

Technical field [0001] The invention relates to a catalyst for preparing cumene by hydrogenation, a preparation method thereof, and the application of the catalyst in preparing cumene by hydrogenation of α-methylstyrene. Background technique [0002] At present, the global output of cumene is nearly 10 million tons, and more than 90% of the cumene is used to produce phenol and acetone. In this process, α-methylstyrene (abbreviated as AMS) is usually produced as a by-product. It is very difficult to separate and remove AMS in the subsequent refining process, but it can be converted into raw material cumene and used in the oxidation process through hydrogenation, thereby reducing The unit consumption of cumene increases the yield of phenol and saves raw material costs. This not only reduces the consumption of raw materials propylene and benzene, but also improves the technical and economic indicators of the device. [0003] A phenol / acetone production unit with an annual output of 1...

Claims

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Application Information

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IPC IPC(8): B01J23/58B01J23/652B01J35/10B01J37/08C07C5/03C07C15/085
CPCC07C5/03B01J23/58B01J23/6525B01J37/088B01J35/613B01J35/633B01J35/635B01J35/615C07C15/085Y02P20/52
Inventor 袁东平刘仲能江兴华
Owner CHINA PETROLEUM & CHEM CORP
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