摘要:
The invention describes a process for preparing P zeolites in which aluminate and silicate solutions are reacted in the presence of a P-zeolite seed.
摘要:
A method for producing a molding of binderless zeolite by exposing to saturated steam a precursor having a tetraalkylammonium salt component, an alkali metal component, and a metal component incorporated in the crystal skeleton of zeolite supported on a molding using silica as a main component, the molding of binderless zeolite, and use of the molding as a catalyst for the production of an alkanolamine.
摘要:
There is provided macrostructures of porous inorganic material which can have controlled size, shape, and/or porosity and a process for preparing the macrostructures. The macrostructures comprise a three-dimension network of particles of porous inorganic materials. The process for preparing the macrostructures involves forming an admixture containing a porous organic ion exchanger and a synthesis mixture capable of forming a porous inorganic material and then converting the synthesis mixture to a solid porous inorganic material. After formation of the composite material, the porous organic ion exchanger can be removed from the composite material to obtain the macrostructures, either before or after the porous inorganic material is hydrothermally treated with a structure directing agent to convert at least a portion of such porous inorganic material to a crystalline molecular sieve composition. The resulting macrostructure is composed of particles of the crystalline molecular sieve composition.
摘要:
A process for the preparation of mesostructured molecular sieve silicas from inorganic silicon precursors and polyoxyethylene oxide based polymers is described. The silicas are stable upon calcination to 600null to 800null C. The silicas are useful in refining processes.
摘要:
The present invention relates to a method for the preparation of zeolite particles having an average particle size of less than 1000 nm, wherein a) a solution of a silicate and/or germanate source and a base is prepared, b) a solution of an aluminate and/or gallate source and a base is prepared, and c) the solutions a) and b) are brought together, mixed and reacted, characterised in that the pH value of the solution in step a) is at least 11 and the pH value of the solution is step b) is at least 11. The invention furthermore relates to nanoscale zeolite particles obtainable by a method according to the invention and to colloidal suspensions comprising the nanoscale zeolite particles.
摘要:
Method of preparing zeolite single crystals comprising the step of applying a synthesis gel with zeolite precursor composition within pore system and on surface of a particulate matrix material having a predetermined pore structure and particle size; subjecting the precursor composition to crystallising conditions; and isolating porous single crystals of the zeolite by removing the matrix material.