285results about "Molecular-sieve silicates" patented technology

The present invention relates to a method of preparing a microporous crystalline molecular sieve having mesoporous skeleton, comprising following steps: (a) adding a meso-SDA (meso-Structure Directing Agent) into a gel composition of synthesizing molecular sieve, (b) subjecting the mixture obtained in the above step (a) to crystallization by a hydrothermal reaction, a microwave reaction, a dry-gel synthesis, etc., and (c) removing selectively organic materials from the resulted material obtained in the above step (b) by a calcination or a chemical treatment. Molecular sieve having mesoporous skeleton synthesized by the present invention exhibits, as compared with conventional zeolite, a good molecule diffusion ability and a greatly improved catalytic activity.

A process for treating organic compounds includes providing a composition which includes a substantially mesoporous structure of refractory oxide containing at least 97% by volume of pores having a pore size ranging from about 15 Å to about 30 Å and having a micropore volume of at least about 0.01 cc / g, wherein the mesoporous structure has incorporated therewith at least about 0.02% by weight of at least one catalytically and / or chemically active heteroatom selected from the group consisting of Al, Ti, V, Cr, Zn, Fe, Sn, Mo, Ga, Ni, Co, In, Zr, Mn, Cu, Mg, Pd, Pt and W, and the catalyst has an X-ray diffraction pattern with one peak at 0.3° to about 3.5° at 2 theta (θ). The catalyst is contacted with an organic feed under reaction conditions wherein the treating process is selected from alkylation, acylation, oligomerization, selective oxidation, hydrotreating, isomerization, demetalation, catalytic dewaxing, hydroxylation, hydrogenation, ammoximation, isomerization, dehydrogenation, cracking and adsorption.

Mesoporous ZSM compositions and methods of preparing same are provided. The starting material is an amorphous metallosilicate which is processed into ZSM-type nanocrystals. Upon calcinations, meso-ZSM-nanaocrystals are prepared.

The invention belongs to the technical field of inorganic chemicals synthesis and relates to a method for modifying titanium silicalite. The method is characterized by comprising the following steps: preprocessing the TS (titanium silicalite)-1; modifying the preprocessed TS-1 by mixed liquor containing quaternary ammonium salt and inorganic base, wherein the quaternary ammonium salt refers to tetrapropyl ammonium fluoride, tetrapropylammonium chloride, tetrapropylammonium bromide, tetrapropylammonium iodide and a mixture of tetrapropyl ammonium fluoride, tetrapropylammonium chloride, tetrapropylammonium bromide and tetrapropylammonium iodide, and the inorganic base refers to lithium hydroxide, sodium hydroxide, potassium hydroxide and a mixture of lithium hydroxide, sodium hydroxide and potassium hydroxide; and postprocessing the modified TS-1. The method for modifying the titanium silicalite has general applicability, and is suitable for TS-1 molecular sieves synthesized by various methods, in particular the TS-1 molecular sieves synthesized by inexpensive systems; and the catalytic performance of epoxidation of gas phase and liquid phase propylenes of the TS-1 molecular sieves can be simultaneously improved.

The invention is related to catalytic materials and particularly to mesoporous molecular sieves embedded with a zeolite, which are thermally stable at a temperature of at least 900° C., and to a method for the preparation of the catalytic materials. Said catalytic materials are suitable for applications in the field of hydrocarbon processing.