Abstract: Binderless zeolite L particles are prepared by a method in which particles are formed from silica and from 0 to 95 wt % preformed zeolite L crystallites, and the particles are thereafter reacted with an alkaline solution comprising a source of alumina to convert the silica binder to zeolite L. These particles may comprise cylindrical zeolite L crystallites with a mean diameter of at least 0.05 micron in a zeolite L matrix and may be used as catalyst. Also acyclic hydrocarbons are dehydrocyclized and/or isomerized by contacting them at a temperature of from 370.degree. C. to 600.degree. C. with this catalyst incorporating at least one Group VIII metal having dehydrogenating activity to convert at least part of the acyclic hydrocarbons into aromatic hydrocarbons.

Abstract: A tertiary-hexyl methyl ether composition comprising 2-Methoxy-2,3-dimethyl butane (MDMB) in an amount of at least 10% by weight based on the total tertiary-hexyl methyl ethers is useful as an octane booster for motor gasoline or motor gasoline feedstock.

Abstract: Inorganic composite membrane containing molecular sieve crystals, comprising a macroporous support to which molecular sieve crystals and modifications thereof have been applied substantially as a monolayer, said crystals and modifications thereof having been oriented so that, toa substantial extent, the pores of the sieve crystals form a significant included angle with the support surface, there being present between the crystals a gastight matrix, at least gastight to a degree sufficient under practical conditions.

Abstract: MFI zeolite crystals of uniform and controllable size may be produced by mixing:(i) a source of particulate silica in which silica particles present have an average diameter of 1 .mu.m or less;(ii) seeds of an MFI zeolite having an average diameter of 100 nm or less in the form of a colloidal suspension;(iii) an organic structure directing agent; and(iv) a source of fluorine or an alkali metal;to form an aqueous synthesis mixture, the seeds being present in an amount of 0.05 to 1700 ppm by weight of the synthesis mixture, and the synthesis mixture having an alkalinity in terms of OH.sup.- /SiO.sub.2 molar ratio of less than 0.1, and allowing the synthesis mixture to crystallize.

Abstract: Zeolite L containing caesium having enhanced catalytic properties is prepared by a process in which said zeolite L is crystallized from a synthesis mixture with a molar composition (expressed as oxides) of:______________________________________ K.sub.2 O/SiO.sub.2 0.22 to 0.30 K.sub.2 O/Cs.sub.2 O 5 to 12 H.sub.2 O/K.sub.2 O 50 to 90 and SiO.sub.2 /Al.sub.2 O.sub.3 6.0 to 7.0 ______________________________________and containing 0.5 to 20 ppm (by weight) of divalent metal cations, e.g. Mg ions. The zeolite L can form part of a dehydrocyclization and/or isomerisation catalyst.

Abstract: Binderless zeolite L particles are prepared by a method in which particles are formed from silica and from 0 to 95 wt % preformed zeolite L crystallites, and the particles are thereafter reacted with an alkaline solution comprising a source of alumina to convert the silica binder to zeolite L. These particles may comprise cylindrical zeolite L crystallites with a mean diameter of at least 0.05 micron in a zeolite L matrix and may be used as catalyst. Also acyclic hydrocarbons are dehydrocyclized and/or isomerized by contacting them at a temperature of from 370.degree. C. to 600.degree. C. with this catalyst incorporating at least one Group VIII metal having dehydrogenating activity to convert at least part of the acyclic hydrocarbons into aromatic hydrocarbons.

Abstract: The present invention relates to a method for using a single distillation column to recover the reactants and products from the reaction of a cyclic diolefin and an olefin to produce an alkenyl bridged ring compound.

Abstract: The present invention provides for amino-crosslinkable coating formulations based on a mixture of a di or polyhydroxy functional polymeric component selected from the group consisting of diesters, polyesters, alkyd polymers, acrylic polymers and polycarbonate polymers, a methylol (alkoxymethyl) amino crosslinking agent and a bis-aromatic polyhydric phenol component having the structure of formula I: ##STR1## wherein X is selected from the group consisting of carbon to carbon covalent bond, oxygen, sulfur, --S--S--, --CO--, --SO--, --SO.sub.2 -- and a divalent organic radical having a molecular weight less than about 400, and wherein Y is independently selected from the group consisting of hydrogen, halogen, C.sub.1 to C.sub.4 alkyl and C.sub.1 to C.sub.4 alkoxy.

Abstract: A process for the formation of esters from at least one phthalic anhydride residue stream produced from the vapor phase oxidation of o-xylene, naphthalene and/or the like which comprises: (a) adding a phthalic anhydride residue stream and a mono-alcohol to a reaction vessel to form a reaction mixture; and (b) heating the reaction mixture and maintaining a pressure sufficient to obtain boiling of the reaction mixture thereby converting any acid and/or anhydride components of the phthalic anhydride residue stream to an ester.