Gas dehydration using membrane and potassium formate solution

B - Operations – Transporting – 01 – D

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B01D 53/26 (2006.01) B01D 53/22 (2006.01) B01D 53/28 (2006.01)

Patent

CA 2428948

Potassium or other alkali metal formate solution (30) is used to absorb moisture from gas (21) through a membrane (22). The membrane (22) may be supported on permeable tubes, and the potassium or other alkali metal formate (32) may be regenerated for reuse, preferably by a cavitation regenerator (29). The potassium or other alkali metal formate should be present as a 40-80 % solution, most preferably 70-76 %. The process is especially useful for the dehydration of natural gas.

Selon l'invention, une solution de formiate (30) de potassium ou d'un autre métal alcalin est utilisée pour absorber l'humidité d'un gaz (21) à travers une membrane (22). La membrane (22) peut reposer sur des tubes perméables, et le formiate (32) de potassium ou d'un autre métal alcalin peut être régénéré en vue d'une réutilisation, de préférence par un régénérateur (29) de cavitation. Le formiate de potassium ou d'un autre métal alcalin doit présenter une teneur comprise entre 40 et 80 % en solution, idéalement entre 70 et 76 %. Le procédé est particulièrement utile pour déshydrater un gaz naturel.

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