초록 ▼

Ferrierite is prepared by a method that provides extremely pure crystalline material. The method consists of preparing a mixture of silica, alumina, alkali metal and pyridine of a certain composition and heating said mixture to form the crystals. The SiO.sub.2 /Al.sub.2 O.sub.3 and OH.sup.- /SiO.sub

Ferrierite is prepared by a method that provides extremely pure crystalline material. The method consists of preparing a mixture of silica, alumina, alkali metal and pyridine of a certain composition and heating said mixture to form the crystals. The SiO.sub.2 /Al.sub.2 O.sub.3 and OH.sup.- /SiO.sub.2 are controlled to insure preparation of high SiO.sub.2 /Al.sub.2 O.sub.3 ratio, high surface area and high purity ferrierite. An improved olefin skeletal isomerization catalyst is prepared from a high silica to alumina ratio, high surface area and high purity ferrierite.

대표청구항 ▼

[ We claim:] [1.] A method of preparing a ferrierite crystalline aluminosilicate comprising:a. preparing a mixture comprising an alkali metal source, silica source, alumina source and a template consisting of pyridine, said mixture having the following composition in moles: EQU Al.sub.2 O.sub.3 : 60

[ We claim:] [1.] A method of preparing a ferrierite crystalline aluminosilicate comprising:a. preparing a mixture comprising an alkali metal source, silica source, alumina source and a template consisting of pyridine, said mixture having the following composition in moles: EQU Al.sub.2 O.sub.3 : 60-500 SiO.sub.2 : 10-40 R: 1.5-4 M.sub.2 O: 950-2000 H.sub.2 Owherein R is pyridine, M is an alkali metal and said alkali metal source and silica source are such that there are 0.05 to 0.15 moles of OH.sup.- for each mole of SiO.sub.2 to produce a ferrierite having silica to alumina ratio of 50 to 70 or there are 0.05 to 0.11 moles of OH.sup.- for each mole of SiO.sub.2 to produce a ferrierite having silica to alumina ratio of greater than 70,b. heating said mixture at a temperature of about 140 to about 180.degree. C. for a time sufficient to provide the ferrierite, andc. recovering the ferrierite.