Abstract: New silanes containing at least two oxazolidinic moieties can be defined by means of the general formula: ##STR1## wherein X.sub.1, X.sub.2, X.sub.3 and X.sub.4 have the meaning as reported in the specification, and each one of A.sub.1, A.sub.2 and A.sub.3 represents from 0 to a plurality of siloxane radicals--SiO--and are better defined in the text of the specification.These compounds are useful as crosslinking agents for moisture-hardening systems based on polyisocyanates, of acrylate polymers and of polyepoxides in compositions for coatings, sealants and adhesive agents.

Abstract: A process for preparing carbamates is disclosed, in which:a stoichiometric or higher-than-stoichiometric amount of an alkyl carbonate or a cycloalkyl carbonate is reacted with an aliphatic, cycloaliphatic or aromatic amine, in a first reaction step, by operating in the presence of a carbamation catalyst, in order to produce a mixture of a carbamate and an urea,the urea contained in the reaction product from the first process step is reacted with carbonate, in a second reaction step, in order to produce the corresponding carbamate, andthe reaction mixture coming from the second process step is submitted to treatments in order to recover the carbamate.The process makes it possible high yields and high values of selectivity to the useful reaction product to be obtained.

Abstract: A new process is described for the preparation of a 2-aryl-propionic acid, such as for instance 2-[4-(2-methyl-propyl)phenyl]propionic or 2-(6'-methoxy-2'-naphthyl)propionic acid, through hydrogenation of a complex salt which consists of the mono- and/or di-valent anion of the corresponding 2-hydroxy-2-aryl-propionic acid, a di- or tri-valent metal cation, such as for instance Al(+3), Fe(+3), Zn(+2), or Mg(+2), and optionally other anonic or neutral ligands.This new process is particularly advantageous in that the starting salt can be obtained directly via electrocarboxylation of the corresponding aryl methyl ketone, e.g. 4-(2-methyl-propyl)acetophenone or (6-methoxy-2-naphthyl) methyl ketone, with metal anodes which dissolve during the electrolysis.

Abstract: A process of oxidation or reduction of organic substrates by an indirect electrochemical route is described. During oxidation, the electrochemical stage produces a metallic oxide having higher valence such as RuO.sub.2, NiOOH, which is applied to an inert conductor support. The supported metallic oxide of higher valence is separated from the aqueous electrolyte and is then placed in contact with the pure organic material to be reacted on. The metallic oxide in this manner is reduced to a lower valence and is subjected to a new electrochemical oxidation after the residues of the organic material are removed. The process consists of a cyclic repetition of these stages. The process of reduction of organic substrates is analogous and is carried out by means of the hydrogen of hydrides formed through a cathodic charge by electrolysis of an aqueous solution.

Abstract: New polyoxazolidines can be defined by means of the general formula: ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and n have the meaning as reported in the specification. These polyoxazolidines are useful as crosslinking agents for moisture-hardening systems on the basis of polyisocyanates, acrylate polymers and polyepoxides, in compositions for coatings, sealant compositions and adhesive compositions.

Abstract: A high-energy-content fuel composition, for controlled-ignition internal combustion engines, contains quadricyclane (tetracyclo-[2.2.1.0-(2,6).0-3,5]-heptane), for which a new synthesis method is proposed.The use of the quadricyclane-containing fuel composition makes it possible a larger amount of energy to be available per each fuel volume unit, and favorably modifies the combustion kinetics in controlled-ignition internal combustion engines.

Abstract: An oxychlorination catalyst is described which is constituted by porous particles of microspheroidal, or at least microcrystalline, alumina impregnated with cupric chloride and with the chloride of an alkali or alkaline-earth metal, in which the copper and the alklai or alkaline-earth metal are uniformly distributed over the entire surface area of the particles. The method for the preparation of the catalyst is also described. The catalyst enables oxychlorination of ethylene to dichloroethane to be achieved with improved fluodynamic behavior of the fluidized catalytic bed and with improved conversions and selectivity towards the useful reaction product.

Abstract: Method to remove acid components from a gas including to absorb those with an organic absorbent based on ethers of polyglycols at an elevated pressure followed by regeneration of the saturated absorbent and by dehydration of a part of the regenerated absorbent by heating, which is characterized in that the dehydration of the absorbent is carried out by the combination of stripping with a gas and heating at the temperature lower than the boiling point at 0.8 to 1.3 atm. by 80.degree. to 150.degree. C.

Abstract: A liquid composition stable during storage and polymerizable radically into organic glasses having a high refractive index, containing:(A) from 20 to 80% wt of a mixture of monomer and oligomers of a carbonic allyl derivative representable by the formula (I): ##STR1## where: X=halogen (except fluorine);a and be independently assume the values 1 or 2;n assumes values from 1 to 5 on condition that at least 10% by weight of the mixture consists of carbonic allyl oligomer derivatives (n>1); and(B) from 80 to 20% by weight of a liquid monomer copolymerizable with the component (A) and chosen from diallyl isophthalate, diallyl terephthalate, triallyl cyanurate and triallyl isocyanurate.

Abstract: New photochromatic and thermochromatic compounds of the spiro-oxazepin-oxazine class are definable by the general formula (I): ##STR1## where the substituents R and R.sub.1 -R.sub.12 are as defined in the description.The process for the preparation of the compounds (I) is described, as is their use as photochromatic and thermochromatic agents.

Abstract: Polymeric stabilizer compounds with a polyorganosiloxane structure suitable for stabilizing organic polymers against UV radiation and heat, containing sterically hindered piperidino groups in their molecule and easily prepared in well defined, predetermined structures.

Abstract: A process is provided for the preparation of N-alkyl-carbamates by directly reacting low-molecular weight alkyl-isocyanates, in particular methyl isocyanate, and a substituted phenolic precursor in solution in the presence of a basic catalyst compound selected from the class of bicyclic amidines or bicyclic guanidines.

Abstract: An enzyme system for hydrolysis of protein material from plant and animal sources is obtained by extracting germinated sorghum seeds. The enzyme system contains a proteolytic component active on intact proteins and large peptides at an optimum pH of 3.2 to 4.2 and a peptidase component active on small peptides at an optimum pH of 4.5 to 6.5. A protein hydrolyzate having an average molecular weight within a selected range can be obtained by varying the pH so as to depress activity of the proteolytic component or the peptidase component. The protein hydrolysates which are obtained are characterized by the absence of bitter taste. Furthermore, by suitably adjusting the enzyme concentration in the reaction medium, the temperature and the hydrolysis time, protein hydrolyzates with an average molecular weight lower than 700 and a low percentage of free amino acids can be obtained.

Abstract: Novel silicon-organic compounds containing an oxazolidine group are defined by the general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, X, n and y have the meanings reported in the description. These compounds are capable of co-cross-linking and to act as adhesion promoters on various polar substrates, in compositions based on poly-isocyanates, polyepoxides or polacrylates, in the field of sealants and adhesives.

Abstract: A reactive hot melt composition comprises the products of the reaction between (A) an aliphatic or aromatic diisocyanate and (B) a mixture containing: (1) a crystalline polycarbonate diol, (2) an elastomeric polycarbonate diol or an elastomeric polycarbonate copolyester diol, and possibly (3) a vitreous polycarbonate diol or a vitreous polycarbonate copolyester diol. The process for preparing the reactive hot melt composition is also described .

Abstract: Cumene is prepared by alkylation of benzene with propylene, or by transalkylation of diisopropylbenzenes in the presence of benzene, on a silica and alumina gel catalyst which is amorphous to X-rays and has an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of between 50/1 and 300/1, a surface area of between 500 and 1000 m.sup.2 /g, an overall pore volume of between 0.3 and 0.6 ml/g and mean pore diameter of the order of 10 .ANG., and which is free or substantially free of pores having a diameter exceeding 30 .ANG..