Ifp Energies Nouvelles

Nicolas Ferrando

Julien Grandjean

Abdelhakim Koudil

Pascal Mougin

P-Louis Carrette

Jean-Pierre Ballaguet

A process for partial dehydration of a gas by contact with a solvent that can be regenerated by: a) A stage for absorption of HO by contact of the gas to be treated and regenerated solvent producing a dehydrated gas effluent and a liquid solvent effluent that is charged with HO and absorbed gas, b) A stage for cooling the solvent charged with HO at ambient temperature, c) A stage for separation by segregation during which liquid HO and the solvent are separated at ambient temperature, d) A stage in which the regenerated solvent that is obtained at the end of stage c) is heated, e) A stage in which the regenerated and heated solvent that is obtained at the end of stage d) is recycled to the absorption stage a).

Process for partial dehydration of a gas by absorption on a solvent that can be regenerated by segregation at ambient temperature

A process and apparatus for the treatment of a gas that contains hydrogen sulfide and sulfurous anhydride, in which: a) the gas () contacts with an organic solvent () containing a catalyst in a gas-liquid reactor-contactor () so as to recover separately liquid sulfur and; a gas effluent containing sulfur vapor; subjecting the gas effluent to a first condensation zone () operating at 70-100&#xb0; C. to deposit the sulfur in solid form on sufficiently cold walls of the equipment in zone (), recovering resultant purified gas containing less than 30 ppm by volume of sulfur melting the deposited solid sulfur to regenerate the equipment, and recycling resultant liquefied sulfur to the reactor contactor.

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Suresnes, France

Nicolas Ferrando