Abstract: The invention concerns a catalyst containing by weight:(a) from 10 to 99.99% of a mordenite being in major part shaped as needles and having a Si/Al atomic ratio of about 5 to 50, a benzene adsorption capacity of more than 5% by weight with respect to the dry mordenite weight, a volume V of a unit cell from 2.73 to 2,78 nm.sup.3, a sodium content by weight lower than 0.2% and adsorbing molecules of a kinetic diameter larger than about 6.6.times.10.sup.-10 m,(b) from 0 to 89.99% of a matrix,(c) from 0.005 to 15% of at least one metal from group VIII, and(d) from 0.005 to 10% of at least one metal from group IV A.The catalyst is used for hydroisomerizing cuts containing a high proportion of normal paraffins having 4, 5, 6 or 7 carbon atoms per molecule to obtain with a good conversion and selectivity a mixture containing a high proportion of isoparaffins.

Abstract: The invention concerns a catalyst containing by weight:(a) from 10 to 99.99% of a mordenite being in major part shaped as needles and having a Si/Al atomic ratio of about 5 to 50, a benzene adsorption capacity of more than 5% by weight with respect to the dry mordenite weight, a volume V of elementary mesh from 2.73 to 2.78 nm.sup.3, a sodium content by weight lower than 0.2% and adsorbing molecules of a kinetic diameter larger than about 6.6.times.10.sup.-10 m,(b) from 0 to 89,99% of a matrix,(c) from 0,005 to 15% of at least one metal from group VIII, and(d) from 0,005 to 10% of at least one metal from group IV A.The catalyst is used for hydroisomerizing cuts containing a high proportion of normal paraffins having 4, 5, 6 or 7 carbon atoms per molecule to obtain with a good conversion and selectivity a mixture containing a high proportion of isoparaffins.

Abstract: Catalyst of aluminosilicate type for isomerization of a C.sub.8 aromatic cut, characterized by the following composition, expressed by weight:(a) 0.01 to 1.5% of at least one metal selected from platinum and palladium,(b) 0 to 99.49% of a matrix,(c) 0.5 to 99.99% of a zeolite corresponding to the following approximate formula:M.sub.2/n O, Al.sub.2 O.sub.3, X SiO.sub.2,whereinM is a proton and/or a metal cation,n is the valence of said cation,x is a number from 12 to 1000, the zeolite, of MFI structure, synthesized in fluoride medium, containing a fluorine proportion, incorporated therewith during the synthesis, in the range from 0.02 to 1.5% by weight.

Abstract: The present invention concerns a new decationized, dealuminated and stabilized zeolite of L type, characterized particularly by:a total SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 8,a potassium content lower than 2.9% by weight,parameters a and c of the elementary mesh respectively lower than 1.836 nm and 0.754 nm,a nitrogen adsorption capacity at 77 K, for a partial pressure P/Ps of 0.19, higher than 11% by weight,a benzene adsorption capacity at 30.degree. C., for a partial pressure P/Ps of 0.25, higher than 8.5% by weight, anda lattice of mesopores whose radii, measured by nitrogen adsorption-desorption at 77 K according to the BJH method, range from 0.8 nm to 20 nm.

Abstract: Preparation of oligomers of C.sub.2 to C.sub.8 olefins useful in gasoline, yet fuel and diesel fuel is disclosed. The oligomerization is catalyzed by a modified mordenite in the H or NH.sub.4 + to form which has been sequentially treated with steam and an acid.

Abstract: New ferrierites are disclosed as well as their process of manufacture.According to the invention, these new ferrierites are characterized by:(a) The following approximate formula:M.sub.x/n (T.sup.III O.sub.2).sub.x (Si.sup.IV O.sub.2).sub.36-xwherein T.sup.III is at least one element selected from the group formed of boron (B.sup.III),aluminum (Al.sup.III),gallium (Ga.sup.III) and iron (Fe.sup.III)x ranges from 0.05 and 6.6M is a compensation cationn is the valence of M.(b) A particular X-ray diagram,(c) A fluorine content after synthesis ranging from about 0.01 to 1.6% by weight, and(d) A Si.sup.IV /T.sup.III molar ratio of at least 4.75.

Abstract: The invention concerns a new stabilized and dealuminated zeolite of OMEGA structure, characterized by:a total SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 10,a sodium content lower than 0.5% by weight,a and c parameters of elementary mesh respectively lower than 1.814 nm and 0.759 nm,a nitrogen adsorption capacity at 77 K higher than about 5% by weight for a partial pressure P/P.sub.o of 0.19,a lattice of mesopores whose radii range preferably from 1.5 to 14 nm.This zeolite can be used in admixture with a convenient matrix in reactions of hydrocarbon conversion.

Abstract: The invention concerns a new mordenite adsorbing molecules of a kinetic diameter higher than about 0.66 nm, prepared from a mordenite of the so-called small pores type.Said zeolite, admixed with a matrix and at least one group VIII metal can be used in n-paraffins hydroisomerization reactions.

Abstract: The invention concerns a stabilized and dealuminated omega zeolite, its manufacture and use in catalytic cracking.It has in particular a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio higher than 10, a sodium content lower than 0.3%, "a" and "c" crystalline parameters respectively lower than or equal to 1.814 nm and 0.760 nm, a particular capacity for nitrogen adsorption and a particular lattice of secondary pores.

Abstract: The invention concerns an improved process for dismutation and transalkylation of alkylaromatic hydrocarbons in the presence of a catalyst consisting essentially of acid mordenite having a total SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio from 9 to 80 and a sodium content lower than 1% by weight, said catalyst containing at least one metal selected from group M formed of nickel, palladium and metals from group I.sub.B of the periodic classification of elements and containing at least one metal of group IV.sub.A of said classification.The catalyst preferably contains from 30 to 99.9 % by weight of mordenite, from 0.005 to 25% by weight of a group M metal, from 0.05 to 10% by weight of a group IV.sub.A metal and optionally up to 50% by weight of a binding agent.The invention is particularly useful for dismutation of toluene or transalkylation of toluene and of alkylaromatic hydrocarbons having at least 9 carbon atoms per molecule.

Abstract: A new catalyst with a highly dealuminated mordenite base, useful in particular in hydrotreatment processes for improving the low temperature properties and the pour point and cloud point of oil cuts contains:(1) an acidic carrier comprising(a) at least 50% (calculated as dry base) of highly dealuminated mordenite and characterized by a molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 higher than 110 and a sodium content lower than or equal to 0.5% by weight, and(b) an amorphous matrix, and(2) said acid carrier containing in association at least one oxide of a metal from group VIII and at least one oxide of a metal from group VI of the periodic classification of elements.