Institut Francais Du Pe'trole

Saipem S.a.

Prosernat

Nouvelles Applications Technologiques

Benoit Landreau

Jean-Claude Amande

Nicole Doerler

Boris Carlier

Alenxandre Bojey

A method of thermally insulating the annular space in an element of an assembly of two coaxial pipes, the space being filled with a porous thermally insulating material, under low absolute gas pressure in which method the following steps are performed: a) the pipe element is inclined, preferably at an angle &#x3b1; of 5&#xb0; to 30&#xb0;, the annular space being closed at each end by respective closure pieces; and b) substantially all of the annular space is filled with the insulating material in the form of particles in bulk; and c) preferably said particles of insulating material are shaken, at least intermittently, as the annular space is filled in order to compact the insulating material, the annular space being maintained under high vacuum during filling.

Method of thermally insulating coaxial pipes with a particulate insulating material

In a process using a hydrophilic liquid desiccant, for dehydrating a gas containing water with regeneration of the steps of: (a) absorbing water by contact between the moist gas and regenerated liquid desiccant from step c), producing a dry gaseous effluent and a stream of liquid desiccant charged with water and absorbed gases; (b) regenerating the liquid desiccant charged with water in a regeneration zone constituting a reboiling zone and a distillation zone, the charged liquid desiccant being sent to said distillation zone, from which a vapor containing water leaves overhead and from which liquid desiccant still containing water leaves from the bottom in the reboiling zone; (c) passing the liquid desiccant from the reboiling zone of step b) and still containing water to an absorption zone, in which the water in the desiccant is vaporized and the water vapor is absorbed by a fraction of regenerated or non regenerated desiccant, passing the resultant desiccant which has absorbed water vapor to the reboiling zone of step b) and returning resultant regenerated desiccant from the absorption zone, to the absorption zone of step a).

Method for dehydrating a wet gas using a liquid dessicant, with advanced regeneration of said dessicant

A process for dehydrating a natural gas or refinery gas containing water and BTEX using a liquid desiccant (glycol) and including regeneration provides the following steps:

Gas drying process using glycol, including purification of discharged gas

Growing community of inventors

Chatenay Malabry, France

Benoit Landreau