Abstract:
A catalyst system comprises an activated sold support material and having, on its surface, one or more catalytic transition metal complex, wherein the solid support material comprises a core@layered double hydroxide shell material having the formula I TP @ {[Mz+(i -x)M'xy+(OH)2]a+(Xn )a/n»bH2O»c(AMO-solvent)}q (I) wherein T is a solid, porous, inorganic oxide-containing framework material, Mz+ and My+ are independently selected charged metal cations; Mz+ is a metal cation of charge z or a mixture of two or more metal cations each independently having the charge z; M'y+ is a metal cation of charge y or a mixture of two or more metal cations each independently having the charge y; z = 1 or 2; y = 3 or 4; 0 0; q>0; Xn~ is an anion; with n > 0; a = z(1-x) + xy-2; and AMO-solvent is an organic solvent which is completely miscible with water. The catalyst system has use in the polymerisation and/or copolymerisation of at least one olefin for producing a homopolymer and/or copolymer. Also disclosed is a process for preparing a polyolefin homopolymer or a polyolefin copolymer which comprises reacting olefin monomers in the presence of the catalyst system. Preferably, the polyolefin is polyethylene and the olefin monomer is ethylene.
Abstract:
Der Katalysator enthält auf Zeolith A als Träger 0,01 bis 0,5 Gew.-% Platin, bezogen auf den Katalysator, und gegebenenfalls Zinn, wobei das Gewichtsverhältnis Sn : Pt 0 bis 10 beträgt.
Abstract:
본 발명의 구체예에서는 제올라이트 구조가 부분적으로 또는 전체적으로 붕괴된 결정질 또는 비결정질 알루미노실리케이트 매트릭스 내에 수소 활성화 금속 클러스터가 둘러싸인 형태로 분산됨으로써 높은 수소화 또는 탈수소화 반응 활성 및 억제된 C-C 수소화분해 활성을 나타내는 수소의 스필오버-기반 촉매 및 이의 용도가 개시된다.
Abstract:
A process for the selective oxidation of one or more components of a fluid stream comprises contacting the fluid stream with an oxidation catalyst at a selected temperature and providing a source of oxygen. The oxidation catalyst comprises a catalyst substrate which is provided with a substantially continuous coating of a molecular sieve material. The process is applicable to both gas phase and liquid phase selective oxidations.
Abstract:
A method of applying molecular sieve crystals to a support, wherein the surface of the support is brought into oxidic condition, whereafter the support is contacted with a solution of the molecular sieve-forming compound or compounds or precursors thereof, whereafter crystallization on the surface is effected.
Abstract:
A method is disclosed for the preparation of a metal exchanged microporous materials, e.g. metal exchanged silicoaluminophosphates or metal exchanged zeolites, or mixtures of metal exchanged microporous materials, comprising the steps of providing a dry mixture of a) one or more microporous materials that exhibit ion exchange capacity and b) one or more metal compounds; heating the mixture in a gaseous atmosphere containing ammonia and one or more oxides of nitrogen to a temperature and for a time sufficient to initiate and perform a solid state ion exchange of ions of the metal compound and ions of the microporous material; and obtaining the metal-exchanged microporous material.
Abstract:
Method for the preparation of a metal-exchanged zeolites or mixtures of metal-exchanged zeolites, such as Cu-SSZ-13, Cu-ZSM-5, Cu-beta, or Fe-beta, comprising the steps of providing a dry mixture of a) one or more microporous zeotype materials that exhibit ion exchange capacity and b) one or more metal compounds; heating the mixture in a gaseous atmosphere containing ammonia to a temperature lower than 300 °C for a time sufficient to initiate and perform a solid state ion exchange of ions of the metal compound and ions of the zeolite material; and obtaining the metal-exchanged zeolitematerial.