Abstract: A method for separating the gaseous CO2 contained in a gas mixture, includes: the step of suspending in a liquid phase a solid absorbent capable of trapping the gaseous CO2; the step of dispersing the gas mixture into the liquid phase, the step being carried out at a temperature ranging from the liquid phase solidification temperature to the evaporation temperature, with the limits excluded, and under a pressure ranging from the atmospheric pressure to 10 bars, with the limits included.

Abstract: A method of separating/purifying a gas mixture (M), includes a step consisting in capturing at least one gas which can generate anionic species by dissolution in aqueous phase. The invention is characterised in that it also includes the following steps consisting in: suspending an absorbent product in the aforementioned aqueous phase, the absorbent product consisting of a lamellar double hydroxide or a mixed oxide which is believed to be amorphous and which originates from the moderate heat treatment of lamellar double hydroxides having an affinity for the above-mentioned gas; distributing the gas mixture (M) in the aqueous phase; and recovering the adsorbate from the absorbent product in suspension.

Abstract: Process for denitrifying subterranean waters to make them potable. The sub-soil is employed as an infiltration site. Wells (3,4), for example four in number, surround a catchment well (5). The wells (3,4) are filled with a mixture based on straw and marl, to permit the denitrification reaction by a heterotrophic route by virtue of the bacteria present in the sub-soil and particularly in the subterranean waters. The denitrified water arrives at the catchment site (5) where it is withdrawn for the distribution (at 7) and for injection (8,9) into the infiltration sites (3,4). A simple, effective and inexpensive process is thus available for making potable the waters from subterranean tables.

Abstract: Continuous monitoring of variations in the concentrations of individual components in gaseous mixtures such as, more particularly, gases released from volcanic vents, is achieved in the field with consistently high precision, namely about 2 ppm, over extended periods of time, while the time lag for detecting a variation is minimized. On-site measurements are made with a portable apparatus, comprising a sampling probe from which the gas is led to an expansion enclosure maintained at a regulated pressure of about 10.sup.-2 to 10.sup.-1 millibar. From this enclosure, the gas is metered by means of a piezoelectric valve into the analyzing chamber of a quadrupole mass-spectrometer. Several units operating in the field, directly over the volcanic vents, may be connected to a central data processing station, so as to derive useful correlations for predicting future volcanic activity, for monitoring geothermal sources, and for detecting gas-release anomalies for purposes of geophysical exploration.

Abstract: Process for treating by reverse flotation phosphate ores of the carbonate or silico-carbonate gangue type. It includes the steps of:(1) conditioning of the ore in a manner known per se with a product acting to depress the phosphate compounds,(2) treatment of the conditioned ore step (1) with a collector essentially comprising a phosphoric ester,(3) flotation of the carbonates, this leading to a flotation residue which contains the phosphate compounds and, if so required, in the case where the starting compound is of the silico-carbonate gangue type,(4) conditioning of said flotation residue by a cationic collector, the possibly present silicates being thus separated by flotation.The process permits benification of the phosphate ores by a treatment wholly carried out in sea-water.

Abstract: The invention relates to a process for obtaining senarmontite and obtained senarmontite.The invention process consists in a direct hydrolysis of antimony trichloride by means of a basic solution, the hydrolysis being carried out in the presence of an oxidizing agent.Use: Obtention of senarmontite.

Abstract: Apparatus for the concentration and sorting of solid waste materials according to their shapes, dimensions, and flexibility without breaking recyclable items. For this purpose, the collar 10 of the apparatus which also comprises a means for extracting flexible products, incorporates lifting devices 11 of bevelled shape and provided with the lining 12 absorbing shocks on the items to be sorted. A portion of these are eliminated at C through large perforations 15, the large flat items being collected at B1, the items having three large dimensions being evacuated at B2.

Abstract: The invention relates to a process for obtaining photostable valentinite and to valentinite obtained by said process.The process consists in carrying out a basic hydrolysis of antimony trichloride at a temperature comprised between about 80.degree. and 100.degree. C. with a weight ratio of H.sub.2 O/Sb.sub.2 O.sub.3 equal to or greater than about 10.Obtention of photostable valentinite.

Abstract: A rotary screen device for sorting refuse material particularly adapted for sorting a mixture of glass and plastics material. The device is generally cylindrical in shape, inclined at a preferred angle to the horizontal, and having three sections, an intake end, a central portion, and an output end. Transverse vanes are arranged in the input end to direct the incoming refuse material towards the central section. The central section includes plural longitudinal vanes which are connected at one end with the transverse vanes in the inlet end and is provided with a uniform distribution of perforations in the regions between the vanes. The outlet end includes no vanes but is provided with peripheral evacuating holes having their largest dimension in a direction perpendicular to the generatrices so that there is no risk of rotating a plastic bottle which could have the effect of an impeller which would drive pieces of glass out of a collection hopper provided below the central section and outlet end.

Abstract: The invention makes it possible to determine impressions independently of a core cutting machine.A hooking device makes it possible to lower the assembly by a simple cable owing to the provision for an additional mass. The position of the eccentric is ascertained by the penetration of pointed rods into a disc under the pressure of one or more of several feelers which releases the rod carrier.The device may be used for the precise determination of the line of greatest slope relative to the impressions even for inclines varying from the vertical by less than 10.degree..

Abstract: A process for recovery of phosphates in ores with silico-carbonate gangue:(1) overall flotation of the ore with a collector comprising essentially a phosphoric ester in an amount and under conditions capable of causing the silicate compounds to pass into the flotation residue, and in recovering a float product containing the phosphate and carbonate compounds.(2) conditioning the float product in an acid medium for a length of time sufficient to cause the flotation of carbonates, while the phosphates constituting the valuable product desired, remain in the residue.

Abstract: A selective flocculation process is provided for the treatment of phosphate ores formed essentially of apatite and a mixture of silicate minerals, for the separation and valorization, i.e., recovery, of the fines, particularly of the fractions whose particle size is less than about 40 .mu.m.

Abstract: A rotary screen device for sorting refuse material particularly adapted for sorting a mixture of glass and plastics material. The device is generally cylindrical in shape, inclined at a preferred angle to the horizontal, and having three sections, an intake end, a central portion, and an output end. Transverse vanes are arranged in the input end to direct the incoming refuse material towards the central section. The central section includes plural longitudinal vanes which are connected at one end with the transverse vanes in the inlet end and is provided with a uniform distribution of perforations in the regions between the vanes. The outlet end includes no vanes but is provided with peripheral evacuating holes having their largest dimension in a direction perpendicular to the generatrices so that there is no risk of rotating a plastic bottle which could have the effect of an impeller which would drive pieces of glass out of a collection hopper provided below the central section and outlet end.

Abstract: The sorting method includes moving materials at a certain horizontal speed such that on falling their points of impact are disbursed over a moving sorting belt in such a manner that the materials become located at points which are sufficiently different to enable effective sorting to be obtained by small adhesion differences so that the adhering materials are carried by the sorting belt to a discharge region and the non-adhering or weakly adhering materials are rejected by the belt. The apparatus includes a feed device located above a moving adhesion belt having an adjustable speed control and an arrangement for adjusting the position of the feed device relative to the adhesion sorting belt.

Abstract: A method and apparatus for pneumatically sorting products heterogeneous in nature, form and dimensions, in which the products, while freely falling are deviated by means of a transverse gaseous flux, the height of fall being adjusted before deviation of the products and before production of a second gaseous flux, characterized in that the deviations imparted to the products while freely falling are produced by compressed gases, and their trajectories are determined by the directing of the expansion of the bases between the ejection zone and the atmosphere by means of large panels formed with multiple openings.

Abstract: The invention relates to the concentration by flotation of fine mesh size and/or oxidized ores.The invention consists in using a chelating agent selected from the .beta.-diketones as flotation reagents in a conventional flotation process. Fine mesh size ores and/or oxidized ores, notably oxidized copper, lead or zinc ores with carbonated and/or silicated gangue can also be used as starting materials.Application:making use as starting materials of ores which are difficult to cause to float by conventional methods.

Abstract: In the apparatus for applying a polymer film to a support as the film and support pass between a heating roller and a pressure roller the heating roller is provided with a freely movable electrical contact comprised of a disk extending into a pool of mercury at one end of the heating roller to accommodate longitudinal heat expansion of the roller to prevent radial variations in the heating element with consequent variations in heating patterns. The supply reel for the polymer film is provided with a spring bias friction brake having a readily disconnectable coupling with the supply reel to facilitate reel changing.

Abstract: The claimed reproduction procedure avoids the use of as many masks as there are degrees of shading for each primary color.For each primary color, only a single mask capable of being stripped and not painted in gouache is used. This mask serves as the mask assignable to the most densely shaded areas, and then upon stripping, as each of the masks assignable to the less densely shaded areas and so on to the weakest density. The mask acts as a photomask for a film which is underexposed for each degree of shading desired bymeans of a single screen.The invention is applicable to the reproduction of all documents using a number of shades of color.

Abstract: The invention relates to a vibrating table allowing very fine particles to be separated with output rates greater than for known tables.The table, supplied with pulp has a series of longitudinal grooves having a decreasing depth. The table mounted with the aid of spring blades on a chassis having an adjustable inclination by means of screws. The positions of the weights of a box are controlled by the group motor having a variable speed, are angularly and radially adjustable. The adjusting of the frequency during the operation allows a maximum output.The invention is applicable to the gravimetric separation of all particles.

Abstract: The invention relates to a small surface liquid decantation apparatus and process for making same.The decantation apparatus consists of a main tank of revolution (1) with a central inlet (8), an exhaust (3) of the decanted products by the bottom and an exhaust (13) on the upper peripheral edge for the purified liquid. The main body (1) comprises annular compartments defined laterally by coaxial walls of revolution (4 to 7) and in communication with the lower portion of the main body (1), provided with an exhaust (3). An indented zone (11, 13 to 17) forming an overflow channel for exhausting the upper layer of purified liquid is provided in the upper edge of each wall (4 to 7). Said indented zones (11, 13 to 17) are substantially diametrically opposite each other from one wall to the next.Current applications for decantation.