Process for producing cumene
AssigneeExxonMobil Chemical Patents Inc.
InventorsAjit B. Dandekar, Michael Hryniszak, David Lawrence Stern
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Abstract
A process for producing cumene is provided which comprises the step of contacting benzene and propylene under at least partial liquid phase alkylating conditions with a particulate molecular sieve alkylation catalyst, wherein the particles of said alkylation catalyst have a surface to volume ratio of about 80 to less than 200 inch−1.
Claims6
A process for producing cumene which comprises the step of contacting benzene and propylene with a particulate molecular sieve alkylation catalyst having a catalytic activity under at least partial liquid phase alkylating conditions to provide a product comprising cumene and a polyisopropylbenzene fraction, said particulate molecular sieve alkylation catalyst comprising MCM-49 having a surface to volume ratio of about 120 inch−1;
- and wherein said catalytic activity of said particulate molecular sieve alkylation catalyst is greater than that of a molecular sieve alkylation catalyst having a surface to volume ratio of less than about 80 inch−1.
A process for producing cumene which comprises the steps of:
- i) contacting benzene and propylene with a particulate molecular sieve alkylation catalyst under at least partial liquid phase alkylating conditions to provide a product containing cumene and a polyisopropylbenzene fraction, wherein the molecular sieve of the alkylation catalyst is MCM-49
- ii) separating the polyisopropylbenzene fraction from the product;
- and
- iii) contacting the polyisopropylbenzene fraction and benzene with a transalkylation catalyst under at least partial liquid phase transalkylating conditions,
- wherein the particles of at least said alkylation catalyst have a surface to volume ratio of about 120 inch−1.
Dependencies are inferred from the claim text.