发明名称 |
Treatment of recycled ammonium sulfate-bisulfate solution |
摘要 |
Ammonium sulfate-bisulfate solution contaminated with metal and other ash producing contaminants is treated by adjusting the pH of the solution to the range that produces a precipitate of the contaminant by the addition of ammonia or ammonium hydroxide; cooled to at least the temperature at which a precipitate is produced; removing the precipitate from the solution; the pH of the solution from which the precipitate has been removed is adjusted to the range at which precipitation is substantially completed by the addition of sulfuric acid; and the SO4= ion concentration and the NH4+ ion concentration of the solution are adjusted to the range of the solution before initial circulation to produce a solution in which the metal concentration has been sufficiently reduced to permit recycle for use in reclaiming used motor oils.
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申请公布号 |
US4224142(A) |
申请公布日期 |
1980.09.23 |
申请号 |
US19790053445 |
申请日期 |
1979.06.29 |
申请人 |
PHILLIPS PETROLEUM COMPANY |
发明人 |
BENEDICT, BRUCE C. |
分类号 |
C01C1/242;C10M175/00;(IPC1-7):C01C1/24;C10M11/00 |
主分类号 |
C01C1/242 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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