Process for coating a catalyst support

Claim 2

A PROCESS FOR APPLYING A HIGH SURFACE AREA COATING TO CATALYST SUPPORTS HAVING A LOW SURFACE AREA WHICH COMPRISES COATING SAID SUPPORT WITH AN ALUMINA SOL MIXTURE CONSISTING ESSENTIALLY OF ABOUT 2.6 TO ABOUT 19 PERCENT CENT BY WEIGHT OF ALUMINUM, ABOUT 1.3 TO ABOUT 25 PER CENT BY WEIGHT OF CHLORINE, ABOUT 36 TO ABOUT 95.7 PERCENT CENT BY WEIGHT OF WATER AND ABOUT 0.4 TO ABOUT 20 PER CENT BY WEIGHT OF AN AMINE OR CONSISTING ESSENTIALLY OF ABOUT 2.6 TO ABOUT 16 PER CENT BY WEIGHT OF ALUMINUM, ABOUT 2.2 TO ABOUT 37 PER CENT BY OF NITRATE, ABOUT 17 PER CENT BY WEIGHT OF AN AMINE AND AND ABOUT 0.4 TO ABOUT 17 PER CENT BY WEIGHT OF AN AMINE AND THEN CALCINING SAID COATED SUPPORT.

Claim 3

A process for applying a high surface area coating to catalyst supports having a low surface area which comprises coating said support with an alumina sol mixture consisting essentially of about 2.6 to about 19 per cent by weight of aluminum, about 1.3 to about 25 per cent by weight of chlorine, about 36 to about 95.7 per cent by weight of water and about 0.4 to about 20 per cent by weight of an amine or consisting essentially of about 2.6 to about 16 per cent by weight of aluminum, about 2.2 to about 37 per cent by weight of nitrate, about 30 to about 94.8 per cent by weight of water and about 0.4 to about 17 per cent by weight of an amine and then calcining said coated support.

Claim 4

A process for applying a high surface area coating to catalyst supports having a low surface area which comprises coating said support with an alumina sol mixture consisting essentially of about 2.6 to about 19 per cent by weight of aluminum, about 1.3 to about 25 per cent by weight of chlorine, about 36 to about 95.7 per cent by weight of water and about 0.4 to about 20 per cent by weight of an amine or consisting essentially of about 2.6 to about 16 per cent by weight of aluminum, about 2.2 to about 37 per cent by weight of nitrate, about 30 to about 94.8 per cent by weight of water and about 0.4 to about 17 per cent by weight of an amine and then calcining said coated support.

Claim 5

The process of claim 1 wherein said amine is hexamethylenetetramine.

Claim 6

The process of claim 1 wherein said mixture is obtained by heating aluminum metal in an aqueous solution of an aluminum salt and thereafter adding hexamethylenetetramine to the resulting sol.

Claim 7

The process of claim 3 wherein said aluminum salt is AlCl3.

Claim 8

The process of claim 3 wherein said aluminum salt is A1(NO3)3.

Claim 9

The process of claim 1 wherein said sol additionally contains at least one metal compound.

Claim 10

The process of claim 6 wherein said metal compound is a ruthenium compound.

Claim 11

The process of claim 6 wherein said metal compound is a platinum compound.

Claim 12

The process of claim 6 wherein said metal compound is a barium compound.

Claim 13

The process of claim 1 wherein said calcination is effected at a temperature of about 260* to about 1,000* C.

Claim 14

The process of claim 1 wherein said catalyst support is a ceramic support.

Claim 15

The process of claim 11 wherein said support is composed of a magnesium aluminum silicate.

Claim 16

The process of claim 1 wherein the calcined support is further coated with a metal compound and the treated support is subjected to additional calcination.

Claim 17

The process of claim 13 wherein said metal compound is a ruthenium compound.

Claim 18

A process for applying a high surface area coating to catalyst supports having a low surface area which comprises coating said support with an alumina sol mixture consisting of about 2.6 to about 19 per cent by weight of aluminum, about 1.3 to about 25 per cent by weight of chlorine and about 56 to about 96.1 per cent by weight of water, further coating with ammonia or an amine in an amount to increase significantly the surface area of said support and then calcining the coated support.

Claim 19

A process for applying a high surface area coating to catalyst supports having a low surface area which comprises coating said support with an alumina sol mixture consisting of about 2.6 to about 19 per cent by weight of aluminum, about 1.3 to about 25 per cent by weight of chlorine and about 56 to about 96.1 per cent by weight of water, further coating with ammonia or an amine in an amount to increase significantly the surface area of said support and then calcining the coated support.

Claim 20

The process of claim 15 wherein said amine is diethylamine.

Claim 21

The process of claim 15 wherein said amine is isopropylamine.

Claim 22

The process of claim 15 wherein said amine is triethylamine.

Claim 23

The process of claim 15 wherein said amine is pyridine.

Claim 24

The process of claim 15 wherein said amine is diethanolamine.

Claim 25

The process of claim 15 wherein the catalyst support is coated with said alumina sol and then such coated support is contacted with a gaseous amine prior to calcination.

Claim 26

The process of claim 15 wherein the catalyst support is coated with said alumina sol and then such coated support is contacted with ammonia prior to calcination.

Claim 27

The process of claim 15 wherein the catalyst support is coated with said alumina sol and then such coated support is contacted with an inert gas carrying an amine prior to calcination.