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US 11,142,593 B2Granted
Lecithin quenching agent
AssigneeExxonMobil Chemical Patents Inc.
InventorsJay L. Reimers, Yifeng Hong, John R. Hagadorn
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Abstract
This disclosure describes polymerization processes and processes for quenching polymerization reactions using reactive particulates, such as lecithin, as quenching agents, typically in solution or bulk polymerization processes.
Claims21
A process for producing a polymer, wherein the process comprises:
- polymerizing a hydrocarbon monomer dissolved in a solvent in the presence of a catalyst system under conditions to obtain a first effluent stream comprising a solution of the polymer and the solvent;
- introducing a quenching agent into the first effluent stream to quench the polymerization reaction, wherein the quenching agent has a molecular weight (Mn) greater than about 2000 daltons and a hydrophilic lipophilic balance (HLB) of less than about 20,
- wherein the quenching agent comprises a lecithin.
A process for quenching a polymerization reaction, wherein the process comprises:
- introducing a quenching agent into a first effluent stream comprising polymer exiting a polymerization zone to quench the polymerization reaction, wherein the quenching agent has a molecular weight greater than about 2000 daltons and a hydrophilic lipophilic balance (HLB) of less than about 20, wherein the quenching agent comprises a lecithin.
A process for producing a polymer, wherein the process comprises:
- polymerizing a hydrocarbon monomer dissolved in a solvent in the presence of a catalyst system under conditions to obtain a first effluent stream comprising a solution of the polymer and the solvent;
- and
- introducing a quenching agent into the first effluent stream to quench the polymerization reaction, wherein the quenching agent is a lecithin.
Dependencies are inferred from the claim text.