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 |
US2016304363(A1) |
申请公布日期 |
2016.10.20 |
申请号 |
US201415035900 |
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 |
C02F1/44;B01D61/02;B01D67/00;B01D69/12;B01D71/56;C10G31/09;B01D63/10;B01D69/02 |
主分类号 |
C02F1/44 |
代理机构 |
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代理人 |
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主权项 |
1. 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 polyamide membrane comprising a porous support and a thin film polyamide 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 1mPa (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). |
地址 |
Midland MI US |