Method for producing MTW-type zeolite

摘要

A method for producing an MTW-type zeolite, comprising (1) mixing an alumina source, an alkali source, a lithium source, and water so as to obtain a reaction mixture (2) Adding a seed crystal of an MTW-type zeolite before or while a silica source is added to the reaction mixture in a proportion of 0.1 to 20% by weight relative to the silica component in the reaction mixture. Mixing and stirring the reaction mixture. Wherein the MTW-type zeolite of the seed crystal has a SiO2/Al2O3 ratio of 10 to 500 and does not contain an organic compound. The reaction mixture has a composition represented by the following molar ratios: SiO2/Al2O3=12 to 200, Na2O/SiO2=0.1 to 0.3, Li2O/(Na2O+Li2O)=0.05 to 0.5 and H2O/SiO2=10 to 50. (3) Air tightly heating the reaction mixture, to which the seed crystal of the MTW type zeolite has been added, at 100 to 200° C.

主权项

1. A method for producing an MTW-type zeolite, comprising:
(1) mixing an alumina source, an alkali source, a lithium source, and water so as to obtain a reaction mixture, (2) adding a seed crystal of an MTW-type zeolite before adding a silica source or adding the seed crystal of the MTW type zeolite while being mixed with a silica source, to the reaction mixture in a proportion of 0.1 to 20% by weight relative to the silica component in the reaction mixture, mixing and stirring,
wherein the MTW-type zeolite of the seed crystal has a SiO2/Al2O3 ratio of 10 to 500 and does not contain an organic compound;wherein the resulting reaction mixture has a composition represented by the following molar ratios:SiO2/Al2O3=12 to 200Na2O/SiO2=0.1 to 0.3Li2O/(Na2O+Li2O)=0.05 to 0.5H2O/SiO2=10 to 50;and
(3) air tightly heating the reaction mixture, to which the seed crystal of the MTW type zeolite has been added, at 100 to 200° C.