Polyethylenimine as a new emulsion breaker for quench water systems
AssigneeEcolab USA Inc.
InventorsFabrice Cuoq, Steven Leen
Life of this patent
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Abstract
Methods to increase the efficiency and throughput of hydrocarbon stream cracking by inhibiting the formation of, or resolving an emulsion, in an ethylene production quench water system. The method includes contacting a non-alkoxylated branched or linear polyethylenimine (PEI) with a quench water composition from the quench water system under conditions suitable to prevent the formation of an emulsion or to resolve the quench water composition into two immiscible phases.
Claims17
A method of inhibiting the formation of, or resolving an emulsion, in an ethylene production quench water system, the method comprising contacting a non-alkoxylated branched or linear polyethylenimine (PEI) with a quench water composition from the quench water system under conditions suitable to prevent the formation of an emulsion or to resolve the quench water composition into two immiscible phases, wherein the PEI is:
- where:
- o is at least 1;
- R3 is H;
- R1, R2, R4, and R5 are selected from the group consisting of hydrogen (H), CH2CH2NH2, CH2CH2NHCH2CH2NH2, CH2CH2N(CH2CH2NH2)2, CH2CH2NHCH2CH2NH(CH2CH2NH2), CH2CH2NHCH2CH2N(CH2CH2NH2)2, CH2CH2N(CH2CH2NH2)(CH2CH2NHCH2CH2NH2), CH2CH2N(CH2CH2NH2)(CH2CH2N(CH2CH2NH2)2), CH2CH2N(CH2CH2NHCH2CH2NH2)(CH2CH2N(CH2CH2NH2)2), CH2CH2N(CH2CH2NHCH2CH2NH2)2 and CH2CH2N(CH2CH2N(CH2CH2NH2)2)2;
- and n is at least 1.
Dependencies are inferred from the claim text.