Abstract: A process for the manufacture of 1,1,1,3,3-pentafluoropropane which comprises adding hydrogen fluoride to 1,1,1,3-tetrafluoropropene in the substantial absence of metal catalyst. Another embodiment provides for the manufacture of 1,1,1,3,3-pentafluoropropane which comprises adding hydrogen fluoride to 1,1,1,3-tetrafluoropropene in the presence of an amine hydrofluoride complex and a metal catalyst.

Abstract: Process for the manufacture of oxidized starch by reacting an aqueous slurry of starch with a peroxide compound, the reaction being carried out in the presence of ozone or by irradiating the slurry with UV light, the amount of peroxide compound used being lower than 30 % by weight calculated on the basis of the weight of dry starch. The oxidized starch can be used as additive for the paper industry or for the food industry.

Abstract: An aqueous solution of sodium chloride is electrolysed in a cell (1) with an ion permselective membrane to produce, on the one hand, chlorine (16) which is converted in a chlorine production unit (6) and, on the other, an aqueous sodium hydroxide solution (19), which is carbonated using a flue gas (13) from an electricity and steam cogeneration unit (5), and the resulting carbonated solution (18) is evaporated to produce sodium carbonate crystals (21).

Abstract: Monolayer ion-exchange membrane structured in the thickness comprising ion-exchange sites covalently bonded to a support polymer, the membrane comprising two surface zones located on either side of a mid-zone, each surface zone having a thickness of not more than 15% of the total thickness of the membrane, in which the surface zones have a mean ion-exchange site density Dsurface calculated on the thickness of the surface zones of at least Dtotal.

Abstract: Method for purifying hydrogen chloride gas containing aromatic organic compounds, comprising at least one step of contacting the said hydrogen chloride with a scrubbing agent containing 1,2-dichlorethane.

Abstract: Process for the purification of aqueous peroxygen solutions comprising the treatment of an aqueous peroxygen solution with (a) at least one membrane purification step, (b) optionally at least one ion exchange purification step, (c) optionally at least one dilution step, and (d) at least one other purification step, all of which can be conducted in any sequence. Aqueous peroxygen solutions having a TOC level of less than 1 mg/kg can be obtained by this process. They can be used in the manufacture of semiconductors.

Abstract: Process for the manufacture of dichloropropanol in which glycerol is reacted with a chlorinating agent comprising hydrochloric acid in a liquid medium in equilibrium with a vapour phase and in which the condensation of a fraction exhibiting the composition of the vapour phase is prevented.

Abstract: The invention relates to core-shell particles, said particles comprising: a core consisting essentially of at least one tetrafluoroethylene (TFE) polymer [polymer (F)], said core having an average primary particle size of less than 100 nm a shell consisting essentially of at least one high performance polymer [polymer (HPP)], wherein the polymer (HPP) is chosen among polycondensation polymers that have a heat deflection temperature (HDT) of above 80° C. under a load of 1.82 MPa when measured according to ASTM D648. The core-shell particles of the invention advantageously allow obtaining molded articles with homogeneous properties, both when used alone and when used as additive, as they generally do not undergo segregation phenomena. Still objects of the inventions are the process for manufacturing said core-shell particles, the use of said particles as additives, the composition and the articles thereof.

Abstract: Process for milling a substance selected from sodium carbonate, sodium bicarbonate and sodium sesquicarbonate or trona, in which a cleaning agent is introduced into a mill for the purpose of obtaining a powder with a mean diameter of less than 100 ?m and of inhibiting the formation of incrustations in the mill.

Abstract: Method for manufacturing a multilayer insulating panel having a cellular core comprising a honeycomb structure based on plastic filled with foam and two external layers of nonexpanded material, the said method comprising the following steps: —one of the external layers (3) of the panel is introduced into a former; —the honeycomb structure (1) is placed on said layer (3) and the second external layer (3?) together with a composition (2) comprising a foaming agent that is poured are also introduced in the former; —the composition comprising the foaming agent is expanded; —the insulating panel is removed from the former. Panel obtained according to said method and uses thereof.

Abstract: Process for manufacturing cellular structure based on a composition comprising an amorphous thermoplastic polymer and made up of sheets extruded in parallel and intermittently welded, according to which: an amorphous polymer composition is chosen which has a dynamic melt viscosity, measured at its processing temperature and at an angular velocity of 0.1 rad/s, of less than 2000 Pa.s; and the temperature of the coolant is regulated so that it is at least equal to Tg—20° C., where Tg is the glass transition temperature of the composition based on the amorphous polymer.

Abstract: Method using a parasiticidal powder typically comprising from 1 to 15% by weight of silica and from 85 to 99% of alkali metal bicarbonate.

Abstract: Oxychlorination catalyst containing at least copper as an active element deposited on a support characterized in that the support consists essentially of an alumina obtained by calcination of an alumina hydrate obtained as by-product of the ALFOL® linear primary alcohol process and use of such catalyst in an oxychlorination process of a hydrocarbon containing 1 to 4 carbon atoms.

Abstract: Process for preparing an epoxide, comprising at least one step of purifying the epoxide formed, the epoxide being at least partly prepared by a process of dehydrochlorinating a chlorohydrin, the latter being at least partly prepared by a process of chlorinating a polyhydroxylated aliphatic hydrocarbon, an ester of a polyhydroxylated aliphatic hydrocarbon or a mixture thereof.

Abstract: Process for the manufacture of 1,2-dichloroethane starting with a hydrocarbon source according to which: a) the hydrocarbon source is subjected to cracking which produces a mixture of products containing ethylene and other constituents; b) the mixture of products containing ethylene is conveyed to at least one storage reservoir; c) a chlorination reactor and/or an oxychlorination reactor is (are) supplied with the previously stored mixture of products containing ethylene, in which reactors most of the ethylene present is converted to 1,2-dichloroethane; d) the 1,2-dichloroethane obtained is separated from the streams of products derived from the chlorination and oxychlorination reactors.

Abstract: Process for the manufacture of 1,2-dichloroethane starting with a hydrocarbon source according to which: a) the hydrocarbon source is subjected to cracking which produces a mixture of products containing ethylene and other constituents; b) the said mixture of products is separated into at least one fraction containing ethylene and into a heavy fraction (fraction C); c) the fraction or fractions containing ethylene are conveyed to a chlorination reactor and/or to an oxychlorination reactor, in which reactors most of the ethylene present is converted to 1,2-dichloroethane; d) the 1,2-dichloroethane obtained is separated from the streams of products derived from the chlorination and oxychlorination reactors and it is conveyed to the pyrolysis oven; and e) the fraction C is conveyed to cracking or to the oven for pyrolysis of 1,2-dichloroethane as fuel.

Abstract: Process for the manufacture of 1,2-dichloroethane starting with a hydrocarbon source according to which: a) the hydrocarbon source is subjected to a first cracking step, namely a pyrolysis step performed in a cracking oven, thus producing a mixture of cracking products; b) the said mixture of cracking products is subjected to a succession of treatment steps ending with a drying step which makes it possible to obtain a mixture of products containing ethylene and other constituents; c) the said mixture of products containing ethylene derived from step b) is separated into at least one fraction containing ethylene and into a heavy fraction; d) the fraction(s) containing the ethylene is (are) conveyed to a chlorination reactor and/or to an oxychlorination reactor, in which reactors most of the ethylene present is converted to 1,2 -dichloroethane; e) the 1,2-dichloroethane obtained is separated from the streams of products derived from the chlorination and oxychlorination reactors; the process being characterized

Abstract: Process for the manufacture of 1,2-dichloroethane starting with a hydrocarbon source according to which: a) the hydrocarbon source is subjected to cracking which produces a mixture of products containing ethylene and other constituents; b) the said mixture of products is separated into a fraction enriched with compounds which are lighter than ethylene, containing part of the ethylene (fraction A), into a fraction enriched with ethylene (fraction B) and into a heavy fraction (fraction C); c) fraction A is conveyed to a chlorination reactor and fraction B to an oxychlorination reactor, in which reactors most of the ethylene present in fractions A and B is converted to 1,2-dichloroethane; d) the 1,2-dichloroethane obtained is separated from the streams of products derived from the chlorination and oxychlorination reactors.

Abstract: Process for preparing a chlorohydrin from a polyhydroxylated aliphatic hydrocarbon, from an ester of a polyhydroxylated aliphatic hydrocarbon or from a mixture thereof, and from a chlorinating agent, the chlorinating agent comprising at least one of the following compounds: nitrogen, oxygen, hydrogen, chlorine, an organic hydrocarbon compound, an organic halogen compound, an organic oxygen compound and a metal.

Abstract: Process for preparing a chlorohydrin, wherein: (a) a polyhydroxylated aliphatic hydrocarbon, an ester of a polyhydroxylated aliphatic hydrocarbon or a mixture thereof is reacted with a chlorinating agent so as to give a mixture containing chlorohydrin, chlorohydrin esters and water, (b) at least a fraction of the mixture obtained in step (a) is subjected to a distillation and/or stripping treatment so as to give a part concentrated with water, with chlorohydrin and with chlorohydrin esters, (c) at least a fraction of the part obtained in step (b) is subjected to a separating operation in the presence of at least one additive so as to give a portion concentrated with chlorohydrin and with chlorohydrin esters and containing less than 40% by weight of water.