Abstract: Polyarylalkane oligomer compositions comprising a mixture of two oligomers A and B, wherein oligomer A is a mixture of isomers of formula: ##STR1## with n1 and n2=0, 1 and 2, given that n1+n2.ltoreq.3; and oligomer B is a mixture of isomers of formula: ##STR2## with n'1, n"1 and n4=0, 1 and 2, n'2, n"2, n3, n'3 and n5=0 and 1, given that n'1+n"1+n'2+n"2+n3+n'3+n4+n5.ltoreq.2.The invention also comprises the process for the preparation of said oligomer compositions by the action of a halide or inorganic acid on a product of free-radical chlorination of toluene.

Abstract: The invention relates to a method and device for the combustion of corrosive products, such as chlorine containing residues, comprising a combustion chamber, a dispersing head having an axial inlet for the phase to be burnt, and means for introducing two separate fractions of the combustive phase, and a plate for connecting the dispersing head to the combustion chamber.

Abstract: The invention concerns a process for the preparation of aliphatic ethers by reacting the corresponding alcohol and/or olefin over a superacid catalyst.

Abstract: A process for the manufacture of the monoether of monoethylene glycol by the hydrogenolysis of a 2-alkyl-1,3-dioxolane, with a co-catalytic system of palladium and an acid of phosphorus or a phosphoric ester of ethylene glycol and in the presence of ethylene glycol.

Abstract: The invention concerns the oilproofing and waterproofing treatment of construction materials by applying to them a composition which comprises by weight:(A) from 0.1 to 25% of a fluorinated copolymer formed from(1) 5 to 70% of a fluorinated ester of the formula: ##STR1## in which Rf represents a perfluoro-alkyl radical, Q represents an oxygen or sulfur atom, W represent a bivalent linkage, one of the symbols R represents a hydrogen atom and the other a hydrogen atom or an alkyl radical,(2) 4 to 50% of a monomer of the formula: ##STR2## in which R' represent a hydrogen atom or an alkyl radical and R' represents an alkylene radical and(3) 0 to 91% of any other monomers'(B) from 2 to 25% of a polyisocyanate or isocyanate prepolymer;(C) from 0.1 to 10% of a catalyst; and(D) one or more diluting solvents to make up to 100%.

Abstract: Process for the preparation of 2-benzoxazolone and derivatives by the reaction, in the liquid phase, at a temperature from 100.degree. to 500.degree. C. and a pressure from 20 to 500 bars, of an ortho-nitrophenol of the formula: ##STR1## in which R represents a hydrogen or halogen atom, an alkyl group containing from 1 to 10 carbon atoms or an alkoxy group OR' in which R' represents an alkyl group containing from 1 to 10 carbon atoms, and carbon monoxide under pressure, characterized in that the process is carried out in the presence ofa. a supported catalyst formed by the association of a noble metal of Group VIII and a second transition metal selected from Groups, V.sub.b, VI.sub.b or VIII of the Periodic Classification, in the metallic or oxide form, andb. a nitrogenous heteroaromatic base; the process may be carried out in the presence of a solvent.