Abstract: The present invention relates to a process for the treatment of a composition comprising thermoplastics comprising introducing the composition into a reactor under reduction of oxygen content of the atmosphere, heating the composition in the presence of a solvent to liquefy the thermoplastics, separating insoluble fractions and recovering the liquefied thermoplastics which process is conducted in one reactor.

Abstract: The present invention relates to a process for the treatment of a composition comprising thermoplastics comprising introducing the composition into a reactor under reduction of oxygen content of the atmosphere, heating the composition in the presence of a solvent to liquefy the thermoplastics, separating insoluble fractions and recovering the liquefied thermoplastics which process is conducted with an aliphatic hydrocarbon as solvent.

Abstract: The present invention relates to a process for the treatment of a composition comprising thermoplastics comprising introducing the composition into a reactor under reduction of oxygen content of the atmosphere, heating the composition in the presence of a solvent to liquefy the thermoplastics, separating insoluble fractions and recovering the liquefied thermoplastics which process is conducted in one reactor.

Abstract: The present invention relates to a process for the treatment of a composition comprising thermoplastics comprising introducing the composition into a reactor under reduction of oxygen content of the atmosphere, heating the composition in the presence of a solvent to liquefy the thermoplastics, separating insoluble fractions and recovering the liquefied thermoplastics which process is conducted with an aliphatic hydrocarbon as solvent.

Abstract: A fluid treatment system by force of thermophoresis, including first and second modules between which the fluid to be treated is intended to circulate, the first module configured to be brought to a temperature greater than that of the second module so as to engender a temperature gradient causing a force of thermophoresis capable of projecting the particles to be purified in the direction of the second module. The first module includes a succession of parallel first tubes configured to be traversed by hot fluid, the second module includes a succession of parallel second tubes configured to be traversed by cold fluid, and the first tubes are arranged staggered with the second tubes.

Abstract: A fluid treatment system by force of thermophoresis, including first and second modules between which the fluid to be treated is intended to circulate, the first module configured to be brought to a temperature greater than that of the second module so as to engender a temperature gradient causing a force of thermophoresis capable of projecting the particles to be purified in the direction of the second module. The first module includes a succession of parallel first tubes configured to be traversed by hot fluid, the second module includes a succession of parallel second tubes configured to be traversed by cold fluid, and the first tubes are arranged staggered with the second tubes.

Abstract: A method for the treatment of sewage sludge, i.e. sludge originating from wastewater treatment plants, includes a step involving solid/liquid separation by filtration. The method includes a step prior to the filtration step, involving the addition of two types of solid loads, each load type including particles having a homogenous average particle size which is different from that of the particles forming the other load type, in order to form an incompressible filter matrix with a high drainage function during the filtration step.

Abstract: The method of incinerating a combustible material (1) comprises, before custion, the following steps:dividing (2) the material into particles,incorporating (3) the divided material into an aqueous medium at a rate of not more than 35% by weight of solid relative to the liquid,foaming and pressurizing the suspension thereby obtained, by incorporating an oxidizer gas (10) and surface-active additives (9) in a mixer (8) of the suspension.

Abstract: Gelling of a liquid or liquefication of a gel are investigated or controlled by differential measurement of thermal characteristics of the involved medium. The temperature of the medium is measured by a first probe (delivering a first temperature indicating signal) while a second probe (sufficiently far away from the first probe not to disturb the latter through temperature changes) imparts heat to said medium and delivers a signal corresponding to its temperature. The signals respectively emitted by the probes are processed in an electrical data processing unit wherein the signals are combined in a correcting stage which corrects the signal delivered by the second probe taking into account the signal delivered by the first probe to deliver information indicating the change of state of the medium.

Abstract: An energetic fluid product containing finely divided solid combustible matter suspended in at least one liquid phase and capable of being made to circulate in a line for supplying a treatment chamber, and a device for the preparation and a particular application of this product. The solid particles (13) are dispersed homogeneously within a stable foam produced by mixing a gas phase with the liquid phase to which stabilizing and emulsifying products have been added, and the liquid phase consists solely of fine film (12) connecting the solid particles (13) together and confining gas bubbles (11) which occupy the spaces between the solid particles (13). The invention applies in particular to the supply of combustible matter to a combustion chamber or to a reactor for coal gasification.

Abstract: A self-lubricating fuel composition is provided formed from powdered coal, a hydrocarbon fraction, water, a surfactant and a strong electrolyte. This composition develops a lubricating layer between the mechanical parts in relative movement with respect to the fluid and the fluid. Such self lubrication causes a reduction of the friction and consequently of the pressure losses during transport in ducts.