Showing papers by "Solvay published in 1972"
Patent•
06 Dec 1972TL;DR: The method of polymerizing olefinic monomers utilizing a solid catalyst composition comprising a solid catalytic complex and an activator, to the resultant high impact resistant polymers, and the method of making such catalytic complexes was described in this article.
Abstract: The present invention relates to the method of polymerizing olefinic monomers utilizing a solid catalyst composition comprising a solid catalytic complex and an activator, to the resultant high impact resistant polymers, to the method of making such catalytic complex, and to the catalytic complex; said catalytic complex comprising the reaction product of an organic oxygenated compound of a metal of groups Ia, IIa, IIb, IIIb, IVb, VIIa, and VIII of the Periodic Table, an organic oxygenated transition compound of a transition metal of groups IVa, Va, and VIa of the Periodic Table, and an aluminium halide.
390 citations
Patent•
01 Aug 1972TL;DR: In this paper, a continuous fibrillated structure, formed by the abrupt pressure release of a two-phase liquid mixture of polymer and solvent at elevated temperature and pressure so as to cause the instantaneous vaporization of the solvent, is shredded by a stream of fluid directed transversely against the continuous structure at the moment of its formation.
Abstract: A continuous fibrillated structure, formed by the abrupt pressure release of a two-phase liquid mixture of polymer and solvent at elevated temperature and pressure so as to cause the instantaneous vaporization of the solvent, is shredded by a stream of fluid directed transversely against the continuous fibrillated structure at the moment of its formation
24 citations
Patent•
18 Apr 1972TL;DR: In this article, a method wherein vinyl chloride is reacted with hydrogen fluoride at temperatures between 100 and 400 DEG C in the presence of a catalyst based on a vanadium derivative impregnated on activated carbon was proposed.
Abstract: A method wherein vinyl chloride is reacted with hydrogen fluoride at temperatures between 100 and 400 DEG C in the presence of a catalyst based on a vanadium derivative impregnated on activated carbon.
22 citations
TL;DR: In this paper, the thermal decomposition of 1-chloro-1-fluoroethane (1-CFL) and 1-1,1-difluorethane at atmospheric pressure has been studied in the temperature range 500-600°C in a flow system.
Abstract: The thermal decompositions of 1-chloro-1-fluoroethane and 1-chloro-1,1-difluorethane at atmospheric pressure have been studied in the temperature range 500–600°C in a flow system. The dehydrochlorinations are homogenous in a carbonaceous reactor and unimolecular. The rate constants are given by
and
The criteria for molecular or chain processes in thermal dehydrochlorinations are discussed.
19 citations
Patent•
14 Nov 1972TL;DR: In this paper, a continuous process for the manufacture of an alkali metal percarbonate is described, in which an aqueous hydrogen peroxide solution and an an acid metal carbonate solution are introduced into a mixer which contains particles of the corresponding percarbonates.
Abstract: A continuous process for the manufacture of an alkali metal percarbonate. An aqueous hydrogen peroxide solution and an aqueous alkali metal carbonate solution are introduced into a mixer which contains particles of the corresponding percarbonate. The wet percarbonate thus formed is dried. A portion of the dried percarbonate is recycled to the mixer and remaining percarbonate is removed as product.
15 citations
Patent•
25 Apr 1972TL;DR: In this article, a continuous longitudinal corrugation of sheets of thermoplastic material including two sets of interdigitated endless bands which follow a rectilinear path in the zone where the sheets are cooled, the bands being guided at least over the portions of the face of the band which is not in contact with the sheets.
Abstract: Device for continuous longitudinal corrugation of sheets of thermoplastic material including two sets of interdigitated endless bands which follow a rectilinear path in the zone where the sheets are cooled, the bands being guided at least over the portions thereof which contact the sheets by supports which act on that face of the band which is not in contact with the sheets.
7 citations
Patent•
13 Dec 1972TL;DR: In this paper, the authors investigated the effect of resinous comparison on the effect strength of VINYLIDINE FLUORIDE and found that RESINOUS COMPOSITIONS have a higher impact strength than the traditional version.
Abstract: THE INVENTION RELATES TO RESINOUS COMPOSITIONS BASED ON POLY(VINYLIDINE FLUORIDE) COMPRISING FROM 30 TO 55% BY WEIGHT OF A POLYAMIDE OF HIGH MOLECULAR WEIGHT RESULTING FROM THE POLYCONDENSATION OF TEREPHTHALIC ACID AND AT LEAST ONE BRANCHED DIAMINE CONTAINING 6 CARBON ATOMS IN ITS MAIN CHAIN. THE RESINOUS COMPOSITIONS HAVE HIGHER IMPACT STRENGTH THAN POLY(VINYLIDENE FLUORIDE).
6 citations
Patent•
12 Oct 1972TL;DR: In this paper, the polymerization of α-olefins in the presence of an activator selected from among the organic compounds of metals of groups Ia, IIa, Ib, IIb and IIIa of the Periodic Table and a solid catalytic element was described.
Abstract: Process for the polymerization of α-olefins in the presence of an activator selected from among the organic compounds of metals of groups Ia, IIa, IIb and IIIa of the Periodic Table and a solid catalytic element prepared by (a) reducing TiCl 4 by means of a reducing metal selected from among the metals of groups Ia, IIa, IIb, IIIa of the Periodic Table so as to prepare a double chloride of titanium and the reducing metal (b) treating the double chloride thus prepared by means of a complexant (c) reacting the double chloride thus treated with TiCl 4 (d) separating the solid catalytic element thus prepared.
6 citations
Patent•
10 Jul 1972TL;DR: In this article, a method for the polymerization and copolymerization of olefins using catalytic complexes is described, where the reaction product of a halogenated derivative of a transition metal with a chelate organic oxygenated bivalent metal compound substantially free of hydroxyl groups.
Abstract: The present invention relates to catalytic complexes for the polymerization and copolymerization of olefins comprising the reaction product of a halogenated derivative of a transition metal with a chelate organic oxygenated bivalent metal compound substantially free of hydroxyl groups; to the catalyst compositions formed by activating such complexes with an organometallic compound; and to the processes of forming such catalytic complexes and polymerizing and copolymerizing olefins utilizing such catalyst compositions.
5 citations
Patent•
06 Dec 1972TL;DR: In this paper, the authors present an approach for ELECTROLYSIS CELLs for producing a gas by electrulysis, where two parallel linear linear metals are arranged facing one another.
Abstract: ANODES FOR ELECTROLYSIS CELLS FOR PRODUCING A GAS BY ELECTROLYSIS COMPRISE VERTICALLY DISPOSED HOLLOW METAL BOXES OPEN AT THEIR LOWER AND UPPER ENDS AND HAVING TWO OPPOSITE PARALLEL METAL WALLS ARRANGED FACING ONE ANOTHER. THESE WALLS ARE SURMOUNTED BY TWO DEFLECTOR PANELS WHICH INCLINE OUTWARDLY AWAY FROM ONE ANOTHER SO AS TO DIVERGE UPWARDLY. THE DEFLECTOR PANELS MWAY BE INTEGRAL WITH THE WALLS OR MAY BE SEPARATE MEMBERS SECIRED TO THE UPPER PORTIONS OF THE WALLS.
5 citations
Patent•
18 Apr 1972TL;DR: In this paper, a method including immersing a coated electrode into a molten salt bath including essentially at least one bisulphate or pyrosulphates of an alkali metal or ammonium, at a temperature between 300 DEG and 500 DEG C, and water-rinsing the so-treated electrode after cooling thereof, was described.
Abstract: A method including immersing a coated electrode into a molten salt bath including essentially at least one bisulphate or pyrosulphate of an alkali metal or ammonium, at a temperature between 300 DEG and 500 DEG C, and water-rinsing the so-treated electrode after cooling thereof.
Patent•
26 Dec 1972TL;DR: In this article, an electrolyser of the series connected filter press type with vertical bipolar electrodes for the production of chlorine, hydrogen and caustic alkali by the electrolysis of a solution of an alkali metal chloride comprises a series of elementary electrolysis cells surmounted by a tank containing the solution.
Abstract: An electrolyser of the series connected filter press type with vertical bipolar electrodes for the production of chlorine, hydrogen and caustic alkali by the electrolysis of a solution of an alkali metal chloride comprises a series of elementary electrolysis cells surmounted by a tank containing the solution. Each of the elementary cells is in communication with the tank by an individual duct of insulating material which extends approximately over the entire height of the cell and opens into the anode chamber at the bottom of the cell. A duct for the evaculation of chlorine from each cell passes up through the bottom of the tank and extends up inside the tank to a point above the level of the solution. Duct means are formed in the bottom portion of the cell frame members, with one duct means registering with a U-shaped tube in each cell for withdrawing caustic alkali from the cell, a second duct means registering with a tube extending to the upper part in each cell for withdrawing hydrogen from each cell, and with a third duct means registering with a transverse distributor in each cell for supplying reagent to each cell.
Patent•
11 Feb 1972TL;DR: In this article, the polymerization and copolymerization of α-olefins is carried out in the presence of a catalyst composition comprising an organometallic compound and the cocatalyst reaction product of a halogenated transition metal compound and an organic compound of a divalent metal.
Abstract: This invention relates to the polymerization and copolymerization of α-olefins and to catalysts and cocatalysts for that purpose wherein the polymerization is carried out in the presence of a catalyst composition comprising an organometallic compound and the cocatalyst reaction product of a halogenated transition metal compound and an organic compound of a divalent metal containing oxygen and nitrogen and being substantially free from hydroxyl groups attached to the divalent metal.
Patent•
04 Apr 1972TL;DR: Boric acid is produced by treating a mixture of water and crude or calcined borocalcic ore with CO2, the partial pressure of which is at least 1 bar, at a temperature above 80 DEG C as mentioned in this paper.
Abstract: Boric acid is produced by treating a mixture of water and crude or calcined borocalcic ore with CO2, the partial pressure of which is at least 1 bar, at a temperature above 80 DEG C. and then separating the liquid phase from the solid phase under a pressure and temperature at least equal to those under which treatment with CO2 was carried out. The pressure and temperature of the liquid phase are then decreased and the boric acid is crystallized from the liquid phase.
Patent•
28 Jun 1972TL;DR: In this article, the authors describe a firmly adhering coating on a metal that includes a base layer whose binder component is a linear polyester resin and a hardener for the same, and a baked surface layer essentially consisting of 10 to 40 percent of the polyester resins employed in the base layer and 60 to 90 percent polyvinylidene fluoride.
Abstract: A firmly adhering coating on a metal includes a baked base layer whose binder component is a linear polyester resin and a hardener for the same, and a baked surface layer essentially consisting of 10 to 40 percent of the polyester resin employed in the base layer and 60 to 90 percent polyvinylidene fluoride.
01 Jan 1972
TL;DR: In this paper, a summary of the results obtained by the study of cristallization kinetics of various samples of polypropylenes is given, along with a discussion of the main results of the experiments.
Abstract: In this work we give a summary of the results obtained by the study of cristallization kinetics of various samples of polypropylenes.