Process for the preparation of cumene
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.
- DOE Contract Number:
- FC07-80CS40454
- Assignee:
- Chemical Research Licensing Company, Houston, TX (United States)
- Patent Number(s):
- US 5055627; A
- Application Number:
- PPN: US 7-405130
- OSTI ID:
- 7281744
- Resource Relation:
- Patent File Date: 11 Sep 1989
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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