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Rhone-Poulenc Industries Patents
Assignee:
Rhone-Poulenc Industries
Address:
Paris, FR
No. of patents:
515
Patents:


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Patent Number Title Of Patent Date Issued
RE31812 Catalytic hydroformylation of olefins January 22, 1985
Olefins are hydroformylated to aldehydes in the presence of a catalytic system comprising a rhodium containing, aqueous solution of certain sulfonated aryl phosphine compounds.
RE30102 Cross-linkable compounds based on saturated polyesters September 25, 1979
The invention relates to compounds based on saturated polyester and cross-linking agent. The compositions comprise a saturated polyester with terminal hydroxyl groups and a cross-linking agent consisting of a dianhydride with ester groups, the product of reaction between a trimelliti
D255380 Hemodialysis reservoir or the like June 10, 1980
D252284 Hemodialysis reservoir or the like July 3, 1979
5244648 Process for the preparation of alumina agglomerates September 14, 1993
Provided is a process for preparing alumina agglomerates which comprises:(i) treating agglomerates of active alumina with an aqueous medium comprising at least one acid making it possible to dissolve at least part of the alumina and at least one compound providing an anion capable of com
5021350 Process for inclusion of mycorrhizae and actinorhizae in a matrix June 4, 1991
This invention relates to a process of inclusion of microorganisms of the group consisting of mycorrhizae and actinorhizae in a polymer gel matrix to prepare a solid, stable, storable preparation suitable for use in particular for agronomic purposes. The polymer gel matrix is based on at
4997978 Preparation of alkyl carboxylates by hydrocarbonylation March 5, 1991
Alkyl carboxylates of the formula:are prepared by hydrocarbonylating a compound of the formula:in the simultaneous presence, in the reaction medium, of cobalt, ruthenium, an alkyl iodide and an ionic iodide, the atomic ratio Co/Ru being less than or equal to 1, and the total amount of iodine
4970030 Process for contacting substances which occur in different phases November 13, 1990
Process for effecting rapid and homogenous intimate contact of substances which occur in different phases. The process includes a step of producing contact between a helicoidal flow of substances, at least partially in the gaseous state, and a rectilinear flow which is coaxial with the f
4942697 Rare earth polishing compositions July 24, 1990
Rare earth glass-polishing compositions of improved homogeneity and reproducibility are prepared by (a) simultaneously continuously admixing a cerium salt solution, a basic solution and a solution of at least one acid and/or one salt, the anion or anions of which being adopted to form
4937058 Catalytic oxidation of sulfur compounds June 26, 1990
Sulfur containing organics, e.g., carbon disulfide carbon oxysulfide, or a mercaptan, are oxidized to sulfur dioxide in gaseopus phase, whether alone or conjointly with hydrogen sulfide and/or elemental sulfur, per se, by passing a gaseous stream thereof, at elevated temperature, over a
4927609 Recovery of gallium/rare earth values from oxide mixtures thereof May 22, 1990
Gallium and rare earth values are recovered from oxide mixtures thereof by acidulating/dissolving such admixtures in an acid medium, and then liquid/liquid extracting the resulting solution and ultimately recovering said values from the phases which separate. The subject process is a
4916119 Peptides, their preparation and compositions containing them April 10, 1990
Tripeptides of the general formula: ##STR1## wherein the symbols R, which may be the same or different represent hydrogen or a fatty acid residue (at least one of them representing a fatty acid residue), R.sub.1 represents hydroxy, amino or alkoxy and R.sub.2 and R.sub.3, which m
4748166 RTV storage stable, water-free organopolysiloxanes May 31, 1988
Storage stable, water-free, RTV organopolysiloxane adhesives curable in the presence of water or atmospheric moisture, and comprising a dihydroxydiorganopolysiloxane polymer, fillers, an amine fraction and a curing catalyst, are characterized by incorporation therein of a polyalkoxyl
4742048 Tetrapeptides and pentapeptides, their preparation and compositions containing them May 3, 1988
Tetrapeptides and pentapeptides of the formula: ##STR1## wherein R represents hydrogen or a fatty acid residue, R.sub.1 represents hydroxy, amino, alkoxy of 1 to 4 carbon atoms, optionally substituted by phenyl or nitrophenyl, one of R.sub.2 and R.sub.4 represents hydrogen, carbo
4724129 Method of recovering gallium from very basic solutions by liquid/liquid extraction February 9, 1988
The method of recovering gallium from very basic solutions such as sodium aluminum liquors from the Bayer process by liquid/liquid extraction by means of an organic phase, preferably formed of an organic solvent and water-insoluble alkylhydroxyquinolines of the general formula ##STR1
4704425 Novel precipitated silica particulates November 3, 1987
Improved precipitated silica particulates, well adapted as a pigment or reinforcing filler for curable organosilic polymers and other elastomers, have the properties:
4671949 Novel anhydrous sodium tripolyphosphate June 9, 1987
A novel anhydrous sodium tripolyphosphate, well adapted as an additive for foodstuffs and detergent compositions, has an Na/P ratio of essentially 1.667.+-.0.01, an apparent density of from 0.5 to 1.1, a mean agglomerate size of less than 100 microns, a phase I content ranging from 15 to
4671947 Novel sodium orthophosphate June 9, 1987
A novel sodium orthophosphate has the formula Na.sub.5 H.sub.4 (PO.sub.4).sub.3 wherein the Na/P ratio thereof is essentially 5/3, and which is characterized by but a single crystalline phase and a characteristic X-ray diffraction pattern.
4629815 Isomerization/rearrangement of polychlorobenzenes December 16, 1986
Polychlorobenzenes are isomerized/rearranged, by reacting (i) at least one tetrachlorobenzene, or at least one tetrachlorobenzene in admixture with at least one trichlorobenzene, pentachlorobenzene and/or hexachlorobenzene, or (ii) pentachlorobenzene, or pentachlorobenzene in admixtu
4622425 Process for the preparation of aqueous solutions of low molecular weight polyacrylic acids or th November 11, 1986
A process for the manufacture of low molecular weight polyacrylic acids or their salts is provided, particularly, their aqueous solutions. Acrylic acid in an aqueous solution containing a polymerization initiator is polymerized in the presence of acetic acid and/or propionic acid.The sol
4622393 3-vinyl-cephalosporins and their preparations November 11, 1986
New 3-vinylcephalosporins of the general formula (I), ##STR1## in which n=0 or 1, R.sub.1 is a radical of the general formula (II), ##STR2## in which R.sub.4 is hydrogen or a protective radical and R.sub.5 represents a radical of the general formula (IIa) ##STR3## in whic
4618460 Process for the preparation of acetic anhydride October 21, 1986
The invention relates to a process for the preparation of acetic anhydride by carbonylation. In the process, carbon monoxide is reacted with methyl acetate in the liquid phase, in a carboxylic acid, in the presence of an effective amount of nickel, methyl iodide, an ionic iodide selected
4612292 Lead/alkaline earth metal silicates and vitrescible compositions comprised thereof September 16, 1986
SiO.sub.2 /MeO metallic silicates, wherein Me is lead or an alkaline earth metal, have a molar ratio of SiO.sub.2 to MeO of greater than 2, and same are well suited as pigments, fillers, and especially as glass-formers.
4609504 Process for the preparation of acetic anhydride September 2, 1986
The invention relates to a process for the preparation of acetic anhydride by carbonylation. In the process, carbon monoxide is reacted with methyl acetate in an anhydrous medium, in the liquid phase, in the presence of an effective amount of nickel, methyl iodide, a quaternary ammonium
4547408 Metal-clad laminate adapted for printed circuits October 15, 1985
A metallized, laminated substrate well adapted for the production of printed circuits is comprised of:(A) an electrically insulating support element which comprises (a) a central core member comprising a major proportion by weight of a cellulosic or mica filler and a minor proportion by
4544698 Polymer coating composition and its use in the manufacture of layered packaging October 1, 1985
The invention pertains to the field of packaging and to a coating composition composed of a polyvinyl alcohol solution and a polymer latex for imparting gas and flavor tight packaging.
4529410 Rare earth polishing compositions July 16, 1985
Rare earth glass-polishing compositions of improved homogeneity and reproducibility are prepared by (a) simultaneously continuously admixing a cerium salt solution, a basic solution and a solution of at least one acid and/or one salt, the anion or anions of which being adopted to form
4524057 Production of concentrated phosphoric acid and hemihydrated calcium sulfate June 18, 1985
Concentrated phosphoric acid and calcium sulfate hemihydrate are directly produced by sulfuric acid attack upon calcium phosphate, the improvements comprising (i) continuously conducting the acid attack reaction, with concomitant formation of crystalline calcium sulfate hemihydrate, in b
4523959 Purification of sugarcane juice June 18, 1985
A process for purifying sugarcane juices by contacting the juices to be purified in succession with a hydrophobic adsorbent, a supported strong anion exchange material or a hydrophobic adsorbent having anion exchanger groups, an anion exchange resin, and a cation exchange resin. The proc
4520193 Cephalosporin derivatives May 28, 1985
The invention provides new cephalosporin derivatives of the general formula, ##STR1## which are in the form of a bicyclooct-2-ene or bicyclooct-3-ene, in which formula R.sub.1 is a radical of the general formula ##STR2## [in which R.sub.5 is hydrogen, alkyl, vinyl, cyanomethy
4518755 Imido copolymers May 21, 1985
Novel imido copolymers are prepared by copolymerizing:[i] a bis-maleimide of the structural formula: ##STR1## with [ii] a (meth)acrylic acid amide.The subject copolymers are applicable to the production of a variety of useful shaped articles, coatings, laminates, foams, and the like.
4518754 Imido copolymers May 21, 1985
Novel imido copolymers are prepared by copolymerizing:[i] a bis-maleimide of the structural formula: ##STR1## [ii] an olefinically unsaturated comonomer copolymerizable therewith. The subject copolymers are applicable to the production of a variety of useful shaped articles, coatings
4504682 Novel polyoxaalkyl aminoalcohols March 12, 1985
Novel polyoxaalkyl aminoalcohols, well adapted for the complexation/solubilization of a wide variety of cations, have the structural formula: ##STR1##
4504643 (Meth)acrylic acid/methallylsulfonate copolymers March 12, 1985
Water-soluble (meth)acrylic acid/methallylsulfonate copolymers, containing less than 20% by weight of the methallylsulfonate comonomer, are well suited as scale inhibitors for aqueous environments, especially those comprising essentially equal amounts by weight of both acrylic and me
4503158 Double or mixed silicates of alkali metal and other glass modifier metal(s) used to prepare glas March 5, 1985
An at least double silicate of an alkali metal and at least one other metal is prepared by interreacting (i) an aqueous solution of an alkali metal silicate and (ii) a solution of an oxide of such at least one other metal, or salt thereof, in the presence of (iii) a water-miscible polar
4487975 Etherification of phenols December 11, 1984
Phenols, including the polyhydric phenols, are selectively monoetherified with an alkyl or alkenyl carboxylate, or admixture of compounds adapted to in situ form such carboxylate, in the presence of a salt of a carboxylic acid.
4463196 Process for the preparation of citral July 31, 1984
Citral is prepared by heating dehydrolinalol in the presence of a vanadium compound as catalyst and an alkanol of 12 to 18 carbon atoms as co-catalyst, whereby isomerization is effected. There may also be present an alkanol or cycloalkanol of 7 to 11 carbon atoms as co-catalyst.
4462937 Process for the preparation of trifluoromethylbenzenes from the corresponding trichloro- or trib July 31, 1984
This invention relates to a continuous process for the preparation of trifluoromethylbenzenes from the corresponding trichloro- or tribromo-methylbenzenes with hydrofluoric acid. The process is characterized by passing an ascending stream of gaseous hydrofluoric acid, countercurrentl
4460801 Unsaturated fatty alcohols and method of preparing them July 17, 1984
New unsaturated fatty alcohols of the formula: ##STR1## in which n=2 or 4 are provided and are prepared by the novel process of reacting butadiene with water in the presence of a palladium salt and orthoboric acid, B(OH).sub.3, in a polar aprotic solvent.
4460786 Process for the selective addition of a compound having an activated carbon atom onto a substitu July 17, 1984
The selective addition of a compound having an activated carbon atom onto the carbon atom in the 4-position of a buta-1,3-diene carrying a hydrocarbon substituent on the carbon atom in the 2-position is achieved by reacting the compound having the activated carbon atom with the buta-
4459242 Method of preparing alkaline difluoromethane sulfonates July 10, 1984
A method of preparing alkaline difluoromethane sulfonates by reacting an alkali-metal sulfite of the formula M.sub.2 SO.sub.3, in which M represents an alkali-metal of column 1 of the Periodic Table of the Elements, with at least an equimolecular quantity of chlorodifluoromethane in
4456657 Metal-clad laminate adapted for printed circuits June 26, 1984
A metallized, laminated substrate well adapted for the production of printed circuits is comprised of:(A) an electrically insulating support element which comprises (a) a central core member comprising a major proportion by weight of a cellulosic or mica filler and a minor proportion by
4455235 Scale inhibition method employing (meth)acrylic acid/methallylsulfonate copolymer June 19, 1984
Water-soluble (meth)acrylic acid/methallysulfonate copolymers, containing less than 20% by weight of the methallylsulfonate comonomer, are well suited as scale inhibitors for aqueous environments, especially those comprising essentially equal amounts by weight of both acrylic and met
4454012 Process for the preparation of methionine June 12, 1984
Crystalline methionine is prepared from an alkali metal methioninate by continuously electrolyzing an aqueous solution of the said alkali metal methioninate and a support electrolyte in an intermediate compartment of a cell comprising an anode compartment, an intermediate compartment
4452974 Preparation of hexamethylenediamine/adipic acid/dimer acid copolyamide June 5, 1984
Flexible, homogeneous and transparent copolyamides comprise the polycondensation products of adipic acid, fatty acid dimer and hexamethylenediamine, the molar ratio of weight adipic acid to weight of total acid in each ranging from about 0.5 to 0.99, and that point obtained by plotti
4447631 Redistribution of tetramethylsilane/dimethyldichlorosilane into trimethylchlorosilane May 8, 1984
Tetramethylsilane/dimethyldichlorosilane admixtures are redistributed into trimethylchlorosilane by passing same, in vapor phase, through a reaction zone under mild temperatures and comprising a catalytic amount of anhydrous aluminum chloride granules. Preferably, the redistribution is
4447331 Intimate contacting/separating of plural phases May 8, 1984
Intimate contacting of plural, physically disparate phases, e.g., for the purification of waste waters typically comprising sulfide and polysulfide pollutants, is effected by (i) co-atomizing a first liquid stream which comprises solid waste progenitors together with a second fluid strea
4442060 Injection-molding of pasty, thermosetting organopolysiloxane compositions April 10, 1984
Pasty organopolysiloxane compositions are facilely injection-molded into elastomeric shaped articles at low pressures, at a temperature ranging from about 125.degree. C. to about 225.degree. C., and in a molding cycle of less than about 25 seconds, said pasty organopolysiloxane compositi
4436889 Preparation of carboxylic acids by carbonylation of alcohols March 13, 1984
Carboxylic acids having the structural formula R.sup.1 COOH, wherein R.sup.1 is a linear, branched or cyclic chain alkyl radical of from 1 to 6 carbon atoms or a phenyl-C.sub.n H.sub.2n -radical wherein 1.ltoreq.n.ltoreq.6, are prepared by carbonylating an alcohol having the formula
4435601 Preparation of polyphenols by oxidation of hydroxybenzaldehydes March 6, 1984
Optionally aldehyde substituted polyphenols are prepared by oxidizing, with hydrogen peroxide, a hydroxybenzaldehyde bearing at least one aldehyde substituent ortho- and/or para- to the nuclear hydroxyl group, in an aqueous reaction medium and in the presence of an alkali or alkaline ear
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