Process for the preparation of cumene
Abstract
Cumene is produced in a catalyst bed under 0.25 to 50 atmospheres of pressure and at temperatures in the range of 50 C to 500 C, using as the catalyst a molecular sieve characterized as acidic by feeding propylene to the catalyst bed while benzene is conveniently added through the reflux to result in a molar excess present in the reactor to that required to react with propylene, thereby reacting substantially all of the propylene and recovering benzene as the principal overhead and cumene and diisopropyl benzene in the bottoms. The bottoms are fractionated, the cumene recovered and the bottoms are contacted with benzene in the liquid phase in a fixed bed straight pass reactor under conditions to transalkylate the benzene thereby converting most of the diisopropyl benzene to cumene which is again separated and recovered. 2 figures.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7281744
- Patent Number(s):
- 5055627
- Application Number:
- PPN: US 7-405130
- Assignee:
- Chemical Research Licensing Company, Houston, TX (United States)
- DOE Contract Number:
- FC07-80CS40454
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 11 Sep 1989
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 02 PETROLEUM; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BENZENE; CHEMICAL REACTIONS; CUMENE; SYNTHESIS; PROPYLENE; ALKYLATION; CATALYTIC EFFECTS; FRACTIONATION; MATERIALS RECOVERY; MOLECULAR SIEVES; SEPARATION PROCESSES; ADSORBENTS; ALKENES; AROMATICS; HYDROCARBONS; MANAGEMENT; ORGANIC COMPOUNDS; PROCESSING; WASTE MANAGEMENT; WASTE PROCESSING; 020500* - Petroleum- Products & By-Products; 400201 - Chemical & Physicochemical Properties
Citation Formats
Smith, Jr, L A, Arganbright, R P, and Hearn, D. Process for the preparation of cumene. United States: N. p., 1991.
Web.
Smith, Jr, L A, Arganbright, R P, & Hearn, D. Process for the preparation of cumene. United States.
Smith, Jr, L A, Arganbright, R P, and Hearn, D. Tue .
"Process for the preparation of cumene". United States.
@article{osti_7281744,
title = {Process for the preparation of cumene},
author = {Smith, Jr, L A and Arganbright, R P and Hearn, D},
abstractNote = {Cumene is produced in a catalyst bed under 0.25 to 50 atmospheres of pressure and at temperatures in the range of 50 C to 500 C, using as the catalyst a molecular sieve characterized as acidic by feeding propylene to the catalyst bed while benzene is conveniently added through the reflux to result in a molar excess present in the reactor to that required to react with propylene, thereby reacting substantially all of the propylene and recovering benzene as the principal overhead and cumene and diisopropyl benzene in the bottoms. The bottoms are fractionated, the cumene recovered and the bottoms are contacted with benzene in the liquid phase in a fixed bed straight pass reactor under conditions to transalkylate the benzene thereby converting most of the diisopropyl benzene to cumene which is again separated and recovered. 2 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {10}
}