Liquid purification or separation – Processes – Separating
Reexamination Certificate
2008-09-02
2008-09-02
Popovics, Robert James (Department: 1797)
Liquid purification or separation
Processes
Separating
C210S787000, C210S800000, C210S803000, C210S805000, C210S167010, C210S181000, C210S195100, C210S252000, C210S258000, C210S259000, C210S512200, C210S513000, C208S050000, C208S126000, C208S131000, C208S132000, C044S281000
Reexamination Certificate
active
11748829
ABSTRACT:
The present invention falls within the field of purifying oil-laden wastewater, which provides a method for purifying coke-cooling wastewater in a delayed coking process in petroleum chemical field. The method comprises the following steps: (a) cooling the coke-cooling wastewater produced in a delayed coking process to 5-55° C. under 0.1-0.25 MPa absolute pressure, to obtain cooled coke-cooling wastewater; (b) subjecting the cooled coke-cooling wastewater to solid-liquid separation, to obtain a coke breeze phase and a liquid phase; (c) further separating the obtained liquid phase, to obtain an oil phase and a water phase; and (d) further discharging water from the obtained oil phase, to obtain the separated oil phase. The present invention also provides an equipment for carrying out the method. The method of the present invention has the following advantages: low cost for the equipment, good effect for treating coke-cooling wastewater, effectively preventing sulfur pollution and foul odor pollution, saving resources and improving the overall utility of the resources, and improving the cool coking efficiency.
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Dai Baohua
Hou Tianming
Hu Jiangqing
Li Hejie
Qian Zhuoqun
Dorsey & Whitney LLP
East China University of Science and Technology
Luoyang Petrochemical Engineering Corporation (LPEC) Sinopec
Popovics Robert James
Rothenberger Scott D.
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