Abstract: 5-pyrazolecarboxylic acid amide-based insecticide and acaricide compounds of general formula (I): ##STR1## in which: R.sub.1 represents a hydrogen atom, a linear or branched C.sub.1 -C.sub.4 alkyl group or a benzyl group;R.sub.2 represents a hydrogen atom or a linear or branched C.sub.1 -C.sub.4 alkyl group;R.sub.x represents a hydrogen atom, a halogen atom such as chlorine, fluorine or bromine, or a linear or branched C.sub.1 -C.sub.4 alkyl or haloalkyl group; or R.sub.2 and R.sub.x together represent an RHC--(CH.sub.2).sub.n --CH.sub.2 group in which R represents a hydrogen atom or a C.sub.1 -C.sub.3 alkyl group and n is a whole number between 1 and 2;R.sub.3, R.sub.4, R.sub.5 represent, each independently, a hydrogen atom or linear or branched C.sub.1 -C.sub.4 alkyl group;X.sub.1, X.sub.2, X.sub.3 and X.sub.4 represent, each independently, a hydrogen atom or a halogen atom such as chlorine, fluorine or bromine;R.sub.y represents a linear or branched C.sub.3 -C.sub.

Abstract: Tungsten-(VI) or molybdenum-(VI)-based compounds which contain cationic groups from onium salts anchored on solid inorganic matrices having the general formula (I):(P) - - - [(CH.sub.2).sub.n Q.sup.+ RR'R"].sub.2 [M.sub.2 O.sub.11 ].sup.2-(I)wherein:(P) represents a solid matrix of inorganic type;n represents an integer comprised within the range of from 1 to 20;Q represents a pentavalent element belonging to Group VA of the Periodic System;R, R' and R", which may be the same or different from each other, represent a hydrogen atom or an alkyl C.sub.1 C.sub.20 group;M represents a tungsten or molybdenum atom.

Abstract: A sintered film containing a copolymer and optionally other common additives is described. The film contains about 30 to 70 parts by weight of a propylene copolymer with a melt index MFI 230/2.16 of at least approximately 3 g./10 min. and about 70 to 30 parts by weight of an ethylene-ethyl acrylate copolymer with a melt index MFI 230/2.16 of at least approximately 3 g./10 min. and with a Vicat softening point of at least about 40. The ethylene-ethyl acrylate copolymer contains approximately 7 to 35 wt % of ethyl acrylate. This film exhibits advantageous properties, particularly a good Shore A hardness.

Abstract: A urea production process in which the urea solution produced in the reaction zone is treated in sequence with a first thermal decomposer at the same pressure as the reaction, to decompose part of the residual ammonium carbamate into its components, then with an adiabatic stripper in which the free ammonia is stripped with CO.sub.2 operating at a pressure which is 1-7 MPa less than the synthesis pressure, then with two further carbamate thermal decomposition stages at decreasing pressures. The gaseous products obtained from those stages at pressures less than the synthesis pressure are mixed with the recycle solutions from the downstream stages, condensed by heat transfer against said downstream stages, and then recycled to the reaction as liquid.

Abstract: Water insoluble polymers containing hydrophilic pendant moieties ending with a chelating group are disclosed. The polymers are useful in the purification of water polluted by heavy metals such as mercury and lead. The polymers have the general formula P--(--(--O--R).sub.n --(NH--Q).sub.p --F).sub.m where P is a polymeric matrix capable of reacting with a polyalkylene glycol or an alkylene oxide having such a structure and molecular weight as to be insoluble in water; R is either --CH.sub.2 CH.sub.2 -- or mixtures of --CH.sub.2 CH.sub.2 -- and --CH.sub.2 CH(CH.sub.3)--, with the molar ratio of both units in the mixture being at least 3:1; n is 3 to 50; m is a numeral such that the % by weight of all of the --(--(--O--R--).sub.n (NH--Q).sub.p --F hydrophilic chains is higher than 1% by weight of the total weight of (I); Q is a C.sub.2 -C.sub.

Abstract: Compounds of general formula ##STR1## wherein: R is a linear or branched C.sub.1 -C.sub.20 alkyl radical, m is either 0 or 1; n has a value of from 1 to 10, are corrosion inhibitors, suitable for inhibiting the general corrosion and the stress brittlening caused by hydrogen sulfide (SSC), in an acidic environment, in the presence, or absence of carbon dioxide, of medium-and high-strength manganese steels and low-alloy steels, commonly used in petrochemical facilities and in bore drilling, transport and processing systems for natural gas or petroleum.

Abstract: A continuous process for deasphalting and demetallating a residue from crude oil distillation, by means of dimethyl carbonate as extraction solvent, comprises:mixing a residue from crude oil distillation with a recycled liquid stream containing oil and dimethyl carbonate, in order to produce a homogeneous solution;cooling said homogeneous solution and separating a refined light, liquid, phase; an extracted middle phase; and a heavy phase containing asphaltenes;recovering a primary, deasphalted/demetallated oil from said light phase;partially recycling said middle phase to the mixing step, and recovering a secondary deasphalted oil from the residual fraction;recovering asphaltenes from said heavy phase.

Abstract: Disclosed is a process for separating metal catalysts based on ammonium and phosphonium phosphotungstates from reaction mixtures in which they are dissolved. The process is based on the use of semipermeable membranes and has found an useful application in the separation of the above said catalysts from mixtures obtained from alkenes and soybean oil epoxidation.

Abstract: A solid component of catalyst, active in the polymerization of propylene and other .alpha.-olefins in stereoregular polymers, is obtained:(i) by treating a non-activated silica support in particles with a tin tetrahalide, to at least partially block the hydroxylic groups of the silica and to obtain a blocked silica;(ii) by impregnating the blocked silica with magnesium dialkyl or magnesium alkyl halide to make the magnesium compound react with the tin compound and with possible residual hydroxylic groups of the silica and to obtain a support;(iii) by halogenating the support by contact with a halogenating agent selected from the halides of tin, antimonium or silicon to obtain a halogenated support;(iv) by titanating the halogenated support with an excess of a titanium tetrahalide to obtain a titanated support;(v) by putting the titanated support in contact with a Lewis base, to obtain a solid component of catalyst.

Abstract: A process is described for deasphalting and demetalating crude petroleum, or a fraction thereof, containing asphaltenes and metals, in which:said crude petroleum or its fraction is brought in to contact with an organic carbonate, the operation being conducted in the homogeneous liquid phase, until a solid residue rich in asphaltenes and asphaltenic metals precipitates; and said solid residue is separated from the homogeneous liquid phase.After separating, the solid, the homogeneous liquid phase can be cooled to separate an oil-rich refined liquid phase from the extracted liquid phase rich in organic carbonate. The separation of the extracted and refined liquid phases can also be achieved by adding a liquid solvent which is more polar than the carbonate, with or without cooling.

Abstract: A catalyst active in the preparation of alternating olefin/carbon monoxide (CO) copolymers is constituted by:(a) at least one salt of a metal of Group IB of the Periodic System,(b) a mono or bidentate ligand base containing one or two nitrogen or phosphorus atoms capable of linking to the metal atom by means of dative bonds,(c) a mineral or organic oxidizer agent.Also disclosed are the preparation of the catalyst and the use of said catalyst in alternated copolymerization of ethylene (C2) and/or other olefins with carbon monoxide (CO).

Abstract: The present invention relates to a process to produce polystyrene foam comprising mixing a predetermined amount of masterbatch mix and a styrenic polymer, heating this mixture, injecting CO.sub.2 and/or nitrogen, in gas or liquid form, as a blowing agent and subsequently extruding, cooling and drying the resulting polystyrene foam.

Abstract: A process for preparing low-density flexible polyurethane foams obtained, in the absence of expanding agents of chlorofluoroalkane type, by the polycondensation of an organic polyisocyanate with at least one polyol of equivalent weight exceeding 50 and functionality equal to or greater than 2, in the presence of an expanding system comprising water and dimethyl carbonate (DMC).

Abstract: A thermotropic copolyester, which displays a liquid-crystal phase of nematic type, within a desired temperature range, contains units deriving from:(a) a saturated, aliphatic dicarboxy acid;(b) 4,4'-dihydroxy-biphenyl and/or mono- or di-alkyl- or -alkenyl-derivatives thereof;(c) 4-hydroxy-benzoic acid and/or alkyl- or alkenyl-derivatives thereof.Such a copolyester improves the processability of unsaturation-containing elastomers and enhances the mechanical properties of subsequently vulcanized products.

Abstract: Compounds based on derivatives of pyrrole[2,1-b]- and imidazo[2,1-b-]thiazoles, with a fungicidal activity, having the general formula (I): ##STR1##

Abstract: Compounds based on 2-thiazole-2-ylpyrrole, with a fungicidal activity, having the general formula (I): ##STR1##

Abstract: A method for monitoring the soundness of the protective covering on underground metal structures subjected to cathodic protection, based on the electrical resistance offered by said covering, and consisting of modulating the imposed cathodic protection current and measuring the corresponding variation in potential due to the ohmic drop, said resistance being obtained from the ratio of the variation in potential to the modulation current.

Abstract: The present invention is directed a film masking mechanism for a camera. The film masking mechanism is adapted for switching the camera between a full size picture frame and a panoramic picture frame while using a single roll of film.

Abstract: Polymeric stabilizers with a polysiloxanic structure contain sterically hindered phenol groups and reactive groups capable of binding themselves to the polymeric structure to be stabilized. These polymeric stabilizers are particularly suitable for applications which require the non-extractability of additives due to solvents, fats or soaps.