Process for the preparation of a functionalized solid product
AssigneeThe British Petroleum Company p.l.c.
InventorsRonald D. Hancock, Jennie M. Kirk
Life of this patent
Estimating the term…
Abstract
A functionalized solid product containing sulphonate or sulphonic acid groups is prepared from an inorganic oxide containing surface hydroxy groups, e.g. silica by reacting the latter in a first stage with a haloalkyl alkoxy- or aryloxysilane. The first stage product is then reacted with an aqueous solution of an inorganic sulphite to give a product containing sulphonate groups. These can be converted to sulphonic acid groups by an optional third stage treatment with dilute mineral acid. The final products are suitable for use as adsorbent materials or catalyst supports.
Claims10
A process for the production of a product containing groups of general formula (I) ##STR6## wherein R is a divalent radical containing up to 20 carbon atoms, R.sup.1 and R.sup.2 are alkoxy or aryloxy groups containing up to 20 carbon atoms, or hydrolysis products thereof, M is a metallic ion and (a) is an integer corresponding to the valency of M, which process comprises reacting an inorganic oxide containing surface hydroxyl groups selected from the group consisting of alumina, titania, zirconia, glass, sepiolite, a zeolite molecular sieve and silica in a first stage with a compound of general formula (III) ##STR7## wherein R, R.sup.1 and R.sup.2 are as hereinbefore defined, Y is a halogen atom or an alkoxy or aryloxy group containing up to 20 carbon atoms and X is a chlorine atom, characterized by the fact that the reaction is effected in the absence of a catalyst and the reaction product of the first stage is reacted in a second stage with an aqueous solution of a water soluble inorganic sulphite to form a sulphonate salt.
A process for the production of a product containing groups of general formula (II) ##STR8## wherein R is a divalent radical containing up to 20 carbon atoms, R.sup.1 is an alkoxy or aryloxy groups containing up to 20 carbon atoms, or hydrolysis products thereof, M is a metallic ion and (a) is an integer corresponding to the valency of M, which process comprises reacting an inorganic oxide containing surface hydroxyl groups selected from the group consisting of alumina, titania, zirconia, glass, sepiolite, a zeolite molecular sieve and silica, in a first stage with a compound of general formula (III) ##STR9## wherein R and R.sup.1 are as hereinbefore defined and R.sup.2 is an alkoxy or aryloxy group or hydrolysis product thereof, Y is a halogen atom or an alkoxy or aryloxy group containing up to 20 carbon atoms and X is a chlorine atom, characterised by the fact that the reaction is effected in the absence of a catalyst and the reaction product of the first stage is reacted in a second stage with an aqueous solution of a water soluble inorganic sulphite to form a sulphonate salt.
Dependencies are inferred from the claim text.