发明名称 |
Process for preparing ammonium zeolites of low alkali metal content |
摘要 |
Ammonium zeolites of extremely low alkali metal content are prepared by a process of potassium ion exchange followed by ammonium ion exchange. Zeolite X or zeolite Y that contain a significant amount of sodium are contacted with a potassium salt solution under conditions that provide a substantial exchange of potassium for sodium. The potassium enriched zeolite is then contacted with an ammonium salt solution so that the ammonium ion replaces the sodium and potassium ions. The resulting ammonium zeolite X or Y contains considerably less than 1% alkali metal calculated as Na2O.
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申请公布号 |
US5435987(A) |
申请公布日期 |
1995.07.25 |
申请号 |
US19930094737 |
申请日期 |
1993.07.22 |
申请人 |
PQ CORPORATION |
发明人 |
COOPER, DAVID A. |
分类号 |
C01B39/02;B01J29/08;B01J37/30;(IPC1-7):C01B39/20 |
主分类号 |
C01B39/02 |
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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