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Method for producing isopropylbenzene through transalkylation

A technology of transalkylation and cumene, applied in the production of bulk chemicals, chemical instruments and methods, hydrocarbons, etc., can solve the problems of unsatisfactory catalytic effect and achieve the effect of low reaction temperature and high space velocity

Inactive Publication Date: 2013-01-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1191198C patent relates to a kind of nanometer MCM-49 molecular sieve and synthetic method, these two patents all do not relate to the MCM-49 molecular sieve slurry after the crystallization carries out O 3 or H 2 o 2 Oxidation treatment to improve electron distribution in molecular sieves
For the transalkylation reaction of diisopropylbenzene containing triisopropylbenzene, using a single molecular sieve catalyst in MCM-22, MCM-49, ZMS-5, X, Y, MOR and BETA, the catalytic effect is not ideal

Method used

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  • Method for producing isopropylbenzene through transalkylation
  • Method for producing isopropylbenzene through transalkylation
  • Method for producing isopropylbenzene through transalkylation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of the catalyst: weighing HMCM-49 / Hβ mass ratio is 45% Hβ / HMCM-49 composite molecular sieve former powder 75g (developed by the research institute of Jilin Petrochemical Company), SB powder 25g, safflower powder 2.0g, formazan Base cellulose 3.5g, mix evenly with 120ml of 15% nitric acid, roll for 20 minutes; carry out granulation; carry out extruding in extruder, wet strip material is placed on the enamel plate, put into oven, heat up to 130 ℃, dry After drying for 5.5 hours, roast in a muffle furnace: from room temperature to 120°C for 30 minutes; at 120°C for 20 minutes; from 120°C to 400°C for 40 minutes; at 400°C for 30 minutes; from 400°C to 580°C ℃ for 30 minutes, then keep the temperature for 300 minutes; cool down to room temperature naturally to prepare the catalyst. Catalyst activity evaluation: put the catalyst into a tubular reactor with a diameter of Φ25*2*900mm, and carry out the reaction of triisopropylbenzene and benzene, the mass percentage...

Embodiment 2

[0030] Catalyst preparation: weighing HMCM-49 / H β mass ratio is 58% H β / HMCM-49 composite molecular sieve former powder 75g (developed by the research institute of Jilin Petrochemical Company), SB powder 12g, ammonium phosphate 8g, Sesame powder 1.5g, citric acid 2g. Mix evenly with 125ml of 15% nitric acid aqueous solution, roll on a roller compactor for 30 minutes, granulate with a granulator, extrude in a extruder, place the wet strip on an enamel plate, and dry at 120°C for 5 hours ; After drying, move to the roasting tray and roast in the muffle furnace, from room temperature to 120 ° C for 30 minutes; at 120 ° C for 20 minutes; from 120 ° C to 400 ° C for 40 minutes; at 400 ° C for 30 minutes; from 400 The temperature was raised to 560°C for 30 minutes, and then kept at a constant temperature for 300 minutes; the temperature was naturally cooled to room temperature to prepare the catalyst.

[0031] Catalyst activity evaluation: put the catalyst into a tubular reactor, t...

Embodiment 3

[0035] Preparation of the catalyst: Weigh 75g of HMCM-49 / Hβ mass ratio of 72% Hβ-HMCM-49 composite molecular sieve powder (developed by Jilin Petrochemical Company Research Institute), 18g of SB powder, 2g of boric acid, 2.5g of Sesame powder g, oxalic acid 1.5g, stir evenly with 130ml of 15% phosphoric acid aqueous solution, rolled on roller compactor for 30 minutes, carried out granulation with granulator, extruded strip at extruder, wet strip material is placed on the enamel dish, in Dry at 120°C for 6 hours; after drying, move to a baking tray and roast in a muffle furnace from room temperature to 120°C for 30 minutes; at 120°C for 20 minutes; from 120°C to 400°C for 40 minutes; at 400°C The temperature was kept constant for 30 minutes; the temperature was raised from 400°C to 545°C for 30 minutes, and then the temperature was kept constant for 300 minutes; the temperature was naturally lowered to room temperature to prepare the catalyst.

[0036] Catalyst activity evaluat...

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Abstract

The invention relates to a method for producing isopropylbenzene through transalkylation. Transalkylation catalyst is obtained by mixing Hbeta / HMCM-49 composite molecular sieve powder, assistant, binding agent, pore-forming agent and lubricant evenly in proportion. The transalkylation catalyst is grinded, granulated, squeezed in strip mode, dried, roasted and cooled to obtain the assistant styrene (SB) powder or one of the SB powder, phosphoric acid, ammonium phosphate and boric acid. The binding agent is sesbania powder, the pore-forming agent is one of methylcellulose, citric acid and oxalic acid, the lubricant is one or two of nitric acid with the concentration of 0.5-15% and phosphoric acid with the concentration of 0.5-15%, and a raw material is diisopropylbenzene or / and triisopropylbenzene and benzene. The transalkylation catalyst is good in activity, high in selectivity and long in service life, and yield of the isopropylbenzene can reach 72.1%-94.1%.

Description

Technical field: [0001] The invention relates to a method for producing cumene by transalkylation of diisopropylbenzene, triisopropylbenzene and benzene. Background technique: [0002] Cumene is an important raw material of organic chemical industry. It is a raw material for phenol, acetone, acetophenone and alpha-methylstyrene. At present, 90% of polyphenols are produced by the cumene method, which uses benzene and propylene as raw materials, and is synthesized by alkylation under the action of an acidic catalyst; Polyisopropylbenzene such as propylbenzene; Reduce the yield of cumene, in order to improve the utilization rate of raw materials and reduce production costs, diisopropylbenzene, triisopropylbenzene and benzene are reacted to carry out alkylation transfer to produce cumene, Improve the yield of cumene. [0003] Industrially, the production process of cumene is the cycle method of alkylation and transalkylation. The early methods were the solid phosphoric acid ...

Claims

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Application Information

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IPC IPC(8): C07C15/085C07C4/18B01J29/80
CPCY02P20/52
Inventor 邓广金张钰赵胤李正姜国玉刘先武焦凤茹
Owner PETROCHINA CO LTD
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