Nickel modified molecular sieves

Structural and Catalytic Properties of Nickel Modified Molecular Sieves... 

Asymmetric hydrogenations have been reported with palladium on silk 123>, palladium on modified cellulose 124> and on modified ion exchange resins 125 >. Also with Raney Nickel modified with amino adds 126> and peptides, 27>. Platinum-carbon catalysts exhibiting shape selectivity have been made by coating them with a thermosetting resin, which is carbonized. In such a way an organic molecular sieve skin is formed over the original catalyst 128>. 

Nickel catalysts on a support have been and continue to be a subject of multilateral studies, the results of which have helped the development of the theory of the polyfunctional catalyst. The catalytic properties of Ni molecular sieves in the presence of H2 2, 7, 8) have not been studied completely. Study of zeolite structural changes and the condition of the metal after thermal and hydrogen treatment have been comparatively poor. The same is true for the influence of zeolite type on the catalytic activity of the metal. This study aims to give additional information on the subject. As type A molecular sieve modified with Ni proves to be a suitable subject for clarifying some of the structural and catalytic peculiarities of zeolites, it is given main consideration. 

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