发明名称 |
Desiccant for drying CH2F2 refrigerant utilizing zeolite |
摘要 |
Difluoromethane (R-32) is of current interest as a partial replacement for chlorodifluoromethane (R-22) refrigerant heretofore widely used in vapor compression refrigeration systems. R-32 has, however, proved to be more reactive than is desirable with the zeolite A adsorbent-desiccant compositions used in such systems to prevent corrosion and freeze-up problems. The potassium cation form of a zeolite A molecular sieve-with at least 60 percent of the sodium cations replaced with potassium ions, agglomerated with a clay binder, and pore-reduced to essentially exclude the adsorption of R-32 having essentially no reactivity with difluoromethane, and having a surface ratio of silicon to aluminum of less than about 1.7 mol/mol as determined by X-ray photoelectron spectroscopy-has been found to be an effective desiccant for refrigerants comprising difluoromethane.
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申请公布号 |
US6313059(B1) |
申请公布日期 |
2001.11.06 |
申请号 |
US20000676278 |
申请日期 |
2000.09.28 |
申请人 |
LAVIN MARYELLEN;COHEN ALAN P.;HURST JACK E. |
发明人 |
LAVIN MARYELLEN;COHEN ALAN P.;HURST JACK E. |
分类号 |
B01D15/04;B01D53/26;B01J20/18;C09K5/04;F25B43/00;(IPC1-7):B01J29/06 |
主分类号 |
B01D15/04 |
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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