Neste Oil Oyj

Dynea Chemicals Oy

Neste Oyj

Tapio Salmi

Marja Tiitta

Jaana Makkonen

Elina Harlin

Hannu Nousiainen

Lars-Peter Lindfors

Dmitry Yu Murzin

Narendra Kumar

P&auml;ivi M&auml;ki-Arvela

Tiina-Kaisa Rantakyl&auml;

Valentina Serra-Holm

Heidi Österholm

Heidi Oesterholm

The present invention relates to an active and selective zeolite catalyst having MTT structure that is useful in skeletal isomerisation of light olefins. The method for the manufacture of the zeolite catalyst having MTT structure comprises the steps of a) preparing of a gel mixture capable of forming crystalline material, and the mixture comprising sources of alkali or alkaline earth metal (M), of an oxide of a trivalent element (X), of an oxide of a tetravalent element (Y), water and a directing agent (R), and the mixture having a composition, in terms of molar ratios, within the given ranges; b) maintaining the mixture under sufficient conditions, including a temperature of from about 100&#xb0; C. to about 250&#xb0; C., under dynamic mode of stirring until crystals of the material are formed, recovering the material; and c) removing the directing agent (R) partly or totally with a calcination procedure.

Zeolite catalyst for skeletal isomerisation of olefins

The invention relates to a process for the preparation of polyols having 3 or 4 hydroxyl groups, from an aldehyde and formaldehyde in the presence of water, followed by hydrogenation of the aldolisation product in the presence of a hydrogenation catalyst at an elevated temperature. The aledhyde is obtained by an aldolisation reaction of an aldehyde having at least two &agr;-hydrogen atoms and a formula according to R CH CHO, wherein R is selected from a group comprising hydrogen, alkyl groups having 1-7 carbon atoms which can have cycloalkyl substituents, cycloalkyl groups, aryl groups and aralkyl groups with 1-7 carbon atoms is the alkyl chain, with formaldehyde in the presence of water in an amount of 20-70 wt %, preferably 40-60 wt % and in the presence of an anion exchange resin. The hydrogenation is preferably carried out in the presence of water.

Process for the preparation of polyols

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Turku, Finland

Tapio Salmi