Preparation of zeolites

US4091007A · kind A · utility

Assignee

• Mobil Oil Corporation · US

Inventors

• Francis G. Dwyer · West Chester, US
• Albert B. Schwartz · Philadelphia, US

Key dates

• Filing date: Oct 30, 1975
• Grant date: May 23, 1978
• Expiry date: Oct 30, 1995

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S423/26
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An improved method for preparing a crystalline aluminosilicate zeolite having uniform pores and greater than 40 percent crystallinity which comprises forming a critical reaction mixture containing a source of at least two cations, silica, alumina and water, wherein at least about 70 weight percent of the alumina is provided to the reaction mixture by an alumina-containing clay being added thereto, and maintaining the reaction mixture at a temperature and pressure for a time necessary to crystallize the crystalline aluminosilicate from the reaction mixture. It is desirable to preform said reaction mixture into discrete particles such as pellets or extrudates which retain their shape and acquire substantial strength in the crystallization process.