发明名称 |
SEPARATION OF HYDROCARBONS FROM AQUEOUS MIXTURE USING FOULING RESISTANT REVERSE OSMOSIS MEMBRANE |
摘要 |
A method for separating hydrocarbons and naphthenic acid from an aqueous mixture containing the same by passing the mixture through a spiral wound element to produce a permeate stream and concentrate stream wherein the concentrate stream has a relatively higher concentration of hydrocarbons than the permeate stream, wherein the spiral wound element includes a composite poly amide membrane comprising a porous support and a thin film poly amide layer, wherein the membrane is characterized by having: i) a NaCl rejection and a benzene tetra carboxylic acid rejection of at least 98% when tested with an aqueous solution containing 2000 ppm NaCl and 100 ppm benzene tetra carboxylic acid at 25 °C, pH 8 and ImPa (150 psi); and ii) a dissociated carboxylate content of at least 0.3 moles/kg of polyamide at pH 9.5 as measured by Rutherford Backscattering (RBS). |
申请公布号 |
WO2015105632(A1) |
申请公布日期 |
2015.07.16 |
申请号 |
WO2014US70287 |
申请日期 |
2014.12.15 |
申请人 |
DOW GLOBAL TECHNOLOGIES LLC |
发明人 |
ROY, ABHISHEK;HAILEMARIAM, LEAELAF MENGISTU;PAUL, MOU;TOMLINSON, IAN A. |
分类号 |
B01D61/02;B01D63/10;B01D71/56;C02F9/00 |
主分类号 |
B01D61/02 |
代理机构 |
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代理人 |
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