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Preparation method of alkyl transferring catalyst

A technology of transalkylation and catalyst, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low transalkylation performance, low benzene/propylene ratio, low reaction temperature, etc. Strong acidity, high activity and good selectivity

Active Publication Date: 2013-09-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MCM series catalysts have the characteristics of low reaction temperature and low benzene / propylene ratio, but the reaction product contains diisopropylbenzene, triisopropylbenzene and polyisopropylbenzene, which affects the reduction of cost
[0004] At present, the transalkylation catalyst is a solid acid catalyst prepared from raw materials such as Y molecular sieve and β molecular sieve. base transfer performance is low

Method used

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  • Preparation method of alkyl transferring catalyst
  • Preparation method of alkyl transferring catalyst
  • Preparation method of alkyl transferring catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take by weighing 200g of the former powder of HMCM-49 molecular sieve produced by Jilin University, 100g of imported SB powder, 10g of kale powder, and 10g of methyl cellulose and mix them with 200g of 15% aqueous nitric acid solution. After granulation and extrusion, the extrusion pressure is 150N, the wet strips are placed on the enamel plate, and dried at 120°C for 5.6h; after drying, they are transferred to the roasting pan and roasted in the muffle furnace, and the roasting temperature is programmed. The stepwise temperature was 120°C, 450°C and 540°C, the heating rate was 1°C / min, and the catalyst was calcined at 540°C for 320 minutes to prepare the catalyst.

[0026] Put the catalyst into the tubular reactor, the reactor is Φ25*2*900mm, and carry out the reaction of triisopropylbenzene and benzene, the mass percentage of triisopropylbenzene and benzene is 90:10, and the total liquid space velocity is 1.4-1.6h -1 , the reaction temperature is 170-250°C, and the re...

Embodiment 2

[0030] Take by weighing 180g of the former powder of HMCM-22 molecular sieve produced by Jilin University, 90g of imported SB powder, 16g of ammonium phosphate, 8g of scallop powder, and 7g of citric acid. 190g, mix evenly; roll on the rolling machine for 25min, after granulation and extruding, extruding pressure 150N, place the wet strip on the enamel plate, dry at 110°C for 5.2h; after drying, move to the baking tray In this method, the catalyst was calcined in a muffle furnace, the calcining temperature was programmed to rise, the stepwise temperature was 120°C, 450°C and 540°C, the heating rate was 2°C / min, and the catalyst was calcined at 540°C for 7.3h.

[0031] Using the evaluation method of Example 1, the reaction results are shown in Table 2.

[0032] Table II

[0033]

Embodiment 3

[0035] Weigh 100g of HMCM-49 molecular sieve raw powder produced by Jilin University, 100g of HMCM-22 molecular sieve raw powder, 95g of imported SB powder, 6.3g of turnip powder, and 8.5g of citric acid, add 180g of 10% phosphoric acid aqueous solution and mix evenly. Rolling on the press for 30 minutes, granulating and extruding, the extrusion pressure is 150N, the wet strips are placed on the enamel plate, and dried at 115°C for 5.7 hours; after drying, move to the baking pan and roast in the muffle furnace. The calcination temperature was programmed to raise the temperature, the subsection temperature was 120°C, 450°C and 540°C, the heating rate was 2°C / min, and the catalyst was calcined at 540°C for 10 hours to prepare the catalyst.

[0036] Using the evaluation method of Example 1, the reaction results are shown in Table 3.

[0037] Table three

[0038]

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Abstract

The invention relates to a preparation method of an alkyl transferring catalyst. The method comprises the following steps of: mixing one or two of HMCM-49, HMCM-22, HY type molecular sieve raw powder with an assistant, a binder, a pore-forming material and a lubricant, carrying out grinding, pelleting, band extrusion, drying, roasting and cooling to obtain the transferring catalyst, wherein the assistant is only SB powder, or one of SB powder, phosphoric acid, ammonium phosphate and boric acid, the binder is sesbania powder, the pore-forming material is one of methylcellulose, citric acid and oxalate, and the lubricant is one or two of 0.5-15% nitric acid and 0.5-15% phosphoric acid. The catalyst can be applied to an alkyl transfer reaction of one or two of diisopropylbenzene and triisopropylbenzene and benzene. The catalyst has the advantages of large average aperture, more through holes and strong total acidity, is easy for poly-isopropyl benzene to diffuse in the catalyst, and has high activity and good selectivity to the alkyl transfer reaction of poly-isopropyl benzene.

Description

Technical field: [0001] The invention relates to a preparation method of a transalkylation catalyst, in particular to a method for preparing a transalkylation catalyst of diisopropylbenzene, triisopropylbenzene and benzene. Background technique [0002] The production of phenol and acetone is mainly the cumene method, which is synthesized by the alkylation reaction (also known as the alkylation reaction) of benzene and propylene under the action of an acidic catalyst; Cumene and other polyisopropylbenzenes. In order to improve the utilization rate of raw materials and reduce production costs, polyisopropylbenzene such as diisopropylbenzene and triisopropylbenzene is reacted with benzene to carry out alkylation transfer, also known as anti-alkylation reaction, to produce cumene. [0003] At present, the methods for producing cumene include alkylation and anti-alkylation recycling methods. Catalysts for synthesizing cumene from benzene and propylene are mainly divided into t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/70B01J29/80C07C6/12C07C15/085
CPCY02P20/52
Inventor 邓广金张钰赵胤李正焦立平焦凤茹
Owner PETROCHINA CO LTD
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