Method of preparation of a combined ZSM-5-ferrierite aluminosili

Details Method of preparation of a combined ZSM-5-ferrierite aluminosili Method of preparation of a combined ZSM-5-ferrierite aluminosili

1986-08-07

1989-01-10

Stoll, Robert L.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

C01B 3328

Patent

active

047972661

ABSTRACT:
A method of preparation of a combined ZSM-5 and ferrierite aluminosilicate is disclosed utilizing a crystallization admixture comprising sodium silicate, a compound of aluminum, sodium oxide, water and a combination of amines comprising piperidine and an aliphatic amine selected from the group of n-butylamine and tetrapropylammonium hydroxide. The latter chosen amine is directive for a ZSM-5 aluminosilicate while the former is directive for a ferrierite aluminosilicate. Examination by Scanning Electron Microscope (SEM) demonstrates a different catalyst morphology than a catalyst synthesized using silica gel and pyridine. The resultant catalyst is useful in the dewaxing of lubricating oils, especially those oils not necessarily treatable by a unitary ferrierite or a unitary ZSM-5 catalyst.

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I. D. Harrison et al., "Comparison of the Shape Selective Properties of Ferrierite, ZSM-5 and ZSM-11", Zeolites, vol. 7, No. 1, Jan. 1987, pp. 21-27.

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