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Title:
METHOD FOR PREVENTING HEAT EXCHANGER FOULING IN OIL PROCESS
Document Type and Number:
WIPO Patent Application WO/2021/199439
Kind Code:
A1
Abstract:
Provided is a novel method enabling an efficient prevention of heat exchanger fouling in an oil process. In one embodiment, the invention relates to a method for preventing heat exchanger fouling in an oil process. The fouling prevention method comprises: first processing whereby a process fluid, which has been added with a chemical agent containing at least one among a phosphate ester compound and a phosphite ester compound that are soluble in oil, is sent in the form of a liquid to a heat exchanger from which adherent fouling has been cleaned; and second processing whereby a process fluid, which has been added with a chemical agent containing a dispersant, is sent in the form of a liquid to the heat exchanger that has undergone the first processing. In the first processing, the chemical agent is added to the process fluid in such a manner that the chemical agent active ingredient concentration (ppm) in the process fluid of the first processing is at a higher concentration than the chemical agent active ingredient concentration (ppm) in the process fluid of the second processing.

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Inventors:
NISHIKOHRI HIROKI (JP)
KOHTA HIROKI (JP)
Application Number:
PCT/JP2020/015373
Publication Date:
October 07, 2021
Filing Date:
April 03, 2020
Export Citation:
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Assignee:
KATAYAMA CHEMICAL WORKS CO (JP)
NALCO JAPAN G K (JP)
International Classes:
C10G75/04
Domestic Patent References:
WO2015022979A12015-02-19
WO2018207708A12018-11-15
Foreign References:
JP2010523816A2010-07-15
JP2008519166A2008-06-05
CN102260873A2011-11-30
JP2019137816A2019-08-22
Attorney, Agent or Firm:
IKEUCHI & PARTNERS (JP)
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