Method for selective extraction of surfactants from crude oil

    公开(公告)号:US10883055B2

    公开(公告)日:2021-01-05

    申请号:US15935471

    申请日:2018-03-26

    Abstract: A method for selective extraction of naphthenic acids from an acidic crude oil, including: providing an acidic crude oil including naphthenic acids and having a total acid number (TAN) greater than 0.4; mixing the acidic crude oil with a first aqueous solution including water and a weak base to extract a portion of naphthenic acids from the acidic crude oil thereby creating a second aqueous solution containing a mixture of the portion of naphthenic acids, the water and the weak base in an emulsion; separating the second aqueous solution from the emulsion; wherein the second aqueous solution contains an additional portion of the acidic crude oil; adding a salt to the second aqueous solution, thereby causing the additional portion of the acidic crude oil to separate from the second aqueous solution; removing the additional portion of the acidic crude oil from the second aqueous solution; and extracting the portion of the naphthenic acids from the second aqueous solution.

    SPECIES EXTRACTION
    4.
    发明申请
    SPECIES EXTRACTION 审中-公开

    公开(公告)号:US20200147519A1

    公开(公告)日:2020-05-14

    申请号:US16660080

    申请日:2019-10-22

    Abstract: A species extraction apparatus for liquid-based extractions is disclosed herein. The apparatus comprises a body supporting a matrix structure comprising cellular units. The apparatus is configured to uptake an absorptive liquid, and the absorptive liquid can remove at least one species from a working fluid that contacts the apparatus. In certain embodiments, the at least one species can be CO2, and the absorptive liquid can be liquid water-free tetraethylenepentamine (TEPA). The apparatus is advantageously manufacture using additive manufacturing techniques.

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