Abstract: A catalytic process for the production of mercaptans from thioethers, which comprises reacting a thioether, in which the sulfur atom of the thioether function is bonded, on the one hand to a tertiary carbon atom and, on the other hand, to a primary or secondary carbon atom, with hydrogen sulfide in the presence of an appropriate acid catalyst, especially an aluminosilicate or an ion-exchange resin.

Abstract: Ionically conductive macromolecular material constituted by a salt in solution in a polymer, the said salt comprising an anion present in the form of a polyether chain one end of which carries an anionic function and which can be applied to the obtention of electrochemical accumulators.

Abstract: Method of conducting an absorption or desorption reaction between a gas and a solid in which the reaction medium is formed using a powdery solid having a compaction between 5 and 60% of the optimum compaction of the reaction without graphite.

Abstract: A device for regulating the operation of a chemical treatment plant, by attenuation of the variances of the regulating parameters, has a calculation circuit connected to a measuring device for measuring flows of compounds at the input of the plant and measuring devices for measuring the contents of residual input compounds still present at the output of the plant. The calculation circuit performs coherence processings of the measured values to attenuate the variances of these values. The measurement provides a set-point signal which is used for the regulation of the plant.

Abstract: A process and apparatus for separating a liquid phase dispersed in a heavier continuous liquid phase, such as a hydrocarbon dispersion in an aqueous phase, of the floatation type, wherein gas bubbles are generated in the continuous phase to assure ascending entrainment of the dispersed phase, the gas bubbles being formed from a mixture of at least one base gas which is only slightly soluble in the continuous phase, and at least one transfer gas with a higher solubility in the continuous phase, such as instance ammonia, thereby significantly improving the separation yield and efficiency.

Abstract: In order to assemble the components of an electrochemical generator using lithium, which are in the form of thin films and comprise a lithium- or lithium alloy-based negative electrode and a solid polymer electrolyte with conduction using the lithium ion, an intermediate assembly is used which consists of a thin film of lithium supported by a film of inert plastic with controlled adhesion to the lithium, as a precursor of the negative electrode. This intermediate assembly can be produced, inter alia, by rolling a sheet of lithium between two films of inert plastic.

Abstract: Catalytic process for producing sulphur from H.sub.2 S-containing acid gas wherein the acid gas is subjected to a catalytic oxidation of CLAUS stoichiometry and to a catalytic CLAUS reaction phase with deposition of sulphur on the catalyst with periodic regeneration of the sulphur-laden catalyst and cooling of the regenerated catalyst. The gas used for the regeneration and for the cooling is tapped from the acid gas supplied to the catalytic oxidation and the gas issued from the regeneration is reintroduced into said acid gas after separation of the sulphur contained therein. The process is particularly applicable to the treatment of acid gases having a low H.sub.2 S content.

Abstract: The invention relates to the synthesis of tertiary mercaptans from isobutylene homopolymers and from hydrogen sulphide by means of heterogeneous catalysis.In the processs according to the invention, the reaction is carried out at a temperature below 45.degree. C., preferably between 0.degree. and 35.degree. C., in the presence of a catalyst consisting of a dry cation exchange resin.Excellent yields of tertiary mercaptan are thus obtained, while the formation of undesirable byproducts is virtually avoided.

Abstract: Method and devices for the selective removal of H.sub.2 S from an H.sub.2 S-containing gas by contacting the gas in an absorption column with an H.sub.2 S-selective absorbent liquid and transferring the H.sub.2 S-charged absorbent liquid to the upper part of a second column. The charged absorbent liquid then travels to a regeneration zone at the bottom of the column, where it is heated to a temperature at which the absorbent liquid is vaporized and the H.sub.2 S is released.The regeneration zone temperature causes the absorbent liquid vapor to strip the H.sub.2 S back to the upper part of the column where it forms an equilibrium with the H.sub.2 S-charged absorbent liquid at a temperature not more than 30.degree. C. higher than the injection temperature of the absorbent liquid in the absorption column, which equilibrium temperature is maintained by the temperature in the regeneration zone. The H.sub.2 S-enriched vapor formed at the equilibrium point is then tapped.

Abstract: This invention relates to the use of water-soluble 3-mercaptopropionic acid disulphide salts as extreme pressure additives for aqueous functional fluids.These salts may be prepared by the oxidation of 3-mercaptopropionic acid followed by bringing the disulphide obtained into contact with an organic or inorganic base.Functional fluids are used during industrial operations such as, for example, the machining of metals.

Abstract: Process for the production of organic polysulphides of the type R--S.sub.n --R, where R is a hydrocarbon group and n a number from 2 to 8, by heating one or more mercaptans with sulphur, in the presence of a catalyst; the catalyst consists of the combination of a mercaptan with an alkene oxide and an alkaline base.

Abstract: A thermochemical heat pump for the transfer of calories between two calorie sources (1, 4) and (2, 5). The heat pump embodies a monovariant system for which the relationship between the logarithm of the pressure and 1/T is singular and quasi-linear. Application to heating.

Abstract: Polymer compounds resulting from the condensation of polyacrylic acids having a molecular weight comprised between 10,000 and 2,000,000 and alkylamines containing at least 12 carbon atoms in their chain. These products constitute paraffin deposit inhibitors and pour point depressants for crude petroleum oils.

Abstract: Process for the detection of heterogeneities of a medium. It is defined in that logs of the attenuation of the shear waves and STONELEY waves are produced, the variations of each attenuation log in relation to a mean value are determined, and then the variations are compared with one another in such a manner as to determine the nature of the heterogeneity or of the petrophysical characteristic which has produced these variations. Application in particular in the area of oil and more particularly in the exploration of a medium. FIG. 9.

Abstract: A gas-liquid mixture consisting in particular of a petroleum product supplied to a feed pipe in a dynamic flow regime is subjected to a vortical gravity-separation process so as to form two separate streams of gas and liquid for separate measurements of their flow rates, the streams being then combined for final dynamic discharge through a common pipe.

Abstract: Process of polymerization of unsaturated hydrocarbons, with an initial induction period, by means of a catalyst constituted by a halogeno-phenate of tungsten, of which the phenate group carries one or more substituents, in the presence of an organometallic co-catalyst; the halogeno-phenate is chosen from amongst those represented by the formula ##STR1## where X is a halogen, especially Cl or Br, n is a whole number 2, 3 or 4, R.sup.1 is H or a C.sub.1 to C.sub.8 straight- or branched-chain alkoxy group, R.sup.2 is H or a C.sub.3 to C.sub.9 branched-chain alkyl group, R.sup.1 and R.sup.2 never being hydrogen simultaneously.

Abstract: A process for the production of an alkanesulphonic acid by hydrolyzing in the heated state an alkanesulphonyl chloride. The process is preferably continuous. The hydrolysis reaction is initiated by the instantaneous use of energy released by the state change of one of the reagents internal to the system.

Abstract: The process consists in generating a primary tube wave, in using a reflecting element for the tube wave and in recording the times of emission of the induced waves radiated by the reflecting element, in receiving and recording at least part of the induced waves, then in processing the recorded signals so as to determine the characteristics of the medium to be explored. Application in particular to exploration between boreholes.

Abstract: Process for carrying out an enzymatic reaction, in which the substrate treated is in an organic liquid which is a fluorinated hydrocarbon, which can include halogens other than fluorine.

Abstract: The invention is a process for removing H.sub.2 S, CO.sub.2 and mercaptans from a gas stream by liquid absorption using an absorbent wherein the mercaptans are absorbed at a high pressure and low temperature in a secondary absorption zone and separated from the absorbent by reduction of pressure after heating. The absorbent after reduction of pressure can be recycled to the absorpiton zone. The H.sub.2 S and CO.sub.2 are absorbed at a higher temperature than the mercaptans and are stripped from the absorbent in a regeneration zone after a reduction in pressure. The absorption zone requires two separate zones where the gas being treated passes from the high temeprature absorption zone to the low temperature zone where the mercaptans are removed.