Method for preparing an alumina as a support for a hydrotreating

Details Method for preparing an alumina as a support for a hydrotreating Method for preparing an alumina as a support for a hydrotreating

1977-05-31

1978-07-25

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252465, 252466J, 208216, 423626, 423628, B01J 2104

Patent

active

041028210

ABSTRACT:
A method for preparing a hydrotreating catalyst having a controlled pore distribution is disclosed. The method requires adding to the alumina prior to forming from 0.1 to 15% by weight of a water soluble polycarboxylic acid having from 2 - 22 carbon atoms. The resulting formed alumina support after being calcined has a pore volume distribution such that most of the pore volume in pores greater than 200 A in diameter as measured by Mercury penetration porosimitry is substantially eliminated. The pore volume as measured by nitrogen adsorption in the range of between 100 A and 1200 A is reduced. The polycarboxylic acid may be added to the catalyst carrier prior to forming in different ways such as by dissolving the catalytically active metals with the water soluble polycarboxylic acid and then impregnating hydrothermally or by pore volume or by adding a water soluble polycarboxylic acid salt to the hydrous or xero gel after precipitation.

REFERENCES:
patent: 3032515 (1962-05-01), Hinsvark
patent: 3232887 (1966-02-01), Pessimisis
patent: 3814683 (1974-06-01), Christman et al.
patent: 3876557 (1975-04-01), Bland
patent: 4038177 (1977-07-01), Eberly

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