Method of catalysis for the production of bisphenol A
AssigneesDdp Specialty Electronic Materials US, LLC, Ddp Specialty Electrons Materials US 8, LLC
InventorsAndrew M. Savo, Mark Vandersall, Klaus-Dieter Topp, Liu Yang
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Abstract
Provided is a process for producing 2,2-bis(4-hydroxyphenyl)propane, comprising condensing phenol with acetone in the presence of an acid catalyst; wherein the acid catalyst comprises a collection of sulfonated polymeric beads, wherein the sulfonated polymeric beads comprise (i) 75 to 99% by weight, based on the weight of the bead, polymerized units of monofunctional vinyl monomer, and (ii) 1 to 25% by weight, based on the weight of the bead, polymerized units of multifunctional vinyl monomer; wherein 90% or more of the beads by volume are uniform beads.
Claims4
A process for producing 2,2-bis(4-hydroxyphenyl)propane, comprising condensing phenol with acetone in the presence of an acid catalyst to produce dihydric phenol 2,2-bis(4-hydroxyphenyl) propane;
- wherein the acid catalyst comprises a collection of sulfonated polymeric beads, wherein the sulfonated polymeric beads comprise
- (i) 75 to 99% by weight, based on the weight of the bead, polymerized units of monofunctional vinyl monomer, and
- (ii) 1 to 25% by weight, based on the weight of the bead, polymerized units of multifunctional vinyl monomer;
- wherein, within each bead, the average concentration of moles of polymerized units of multifunctional vinyl monomer per cubic micrometer is MVAV;
- and
- wherein, within each bead, T1000 is a sequence of 1,000 unique connected polymerized monomer units;
- wherein, within each T1000, MVSEQ is the weight percent polymerized units of multifunctional vinyl monomer, based on the weight of T1000;
- wherein MVRATIO=MVSEQ/MVAV;
- and
- wherein 90% or more of the beads by volume are uniform beads, wherein a uniform bead is a bead in which 90% or more of all T1000 sequences has MVRATIO of 1.5 or less.
Dependencies are inferred from the claim text.