摘要:
Catalyst suitable for the hydrogenation of aromatic or polyunsaturated compounds comprising a zirconia carrier (ZrO 2 ), containing ruthenium, as catalyst, and iron oxide (Fe 2 O 3 ), as promoter, characterized in that at least one metal oxide, selected from those of the groups IB, IIB and IIIA, is present on the carrier as further promoter.
摘要翻译:催化剂适用于包含氧化锆载体(ZrO 2的)含钌作为催化剂,和氧化铁(FE 2 O 3)的芳族或不饱和化合物的氢化,如启动子,其特征在于,所做的至少一种金属氧化物,从这些被选中的 基团IB,IIB和IIIA族的,是存在于载体作为另外的启动子上。
摘要:
The invention relates to a process for the alkylation of benzene with ethanol, as alkylating agent, or mixtures of ethanol and ethylene, which comprises effecting said reaction in gaseous phase or mixed gas- liquid phase, and in the presence of a catalytic system containing a zeolite belonging to the MTW family. According to a preferred aspect, ethanol obtained from biomasses is used, in particular obtained from the fermentation of sugars deriving from biomasses.
摘要:
A process is described for the preparation of zeolitic catalysts in the form of microspheres, comprising zeolite and oligomeric silica, characterized by a high mechanical resistance. The process consists in subjecting to rapid drying the suspension, to which tetra-alkylorthosilicate is optionally added, resulting from the synthesis of zeolite by hydrothermal treatment at autogenous pressure of the reagent mixture containing tetra-alkylammoniumhydroxide as templating agent, and subjecting the product resulting from the drying to calcination.
摘要:
The present invention relates to a new zeolite having a beta-type crystalline structure, characterized by a distribution of the Lewis acid sites and Brønsted acid sites corresponding to a molar ratio [Lewis sites]/[Brønsted sites] equal to or higher than 1.5. This new zeolite is useful in preparation processes of alkylated aromatic hydrocarbons through the alkylation and/or transalkylation of aromatic compounds. The preparation method of the new zeolite is also object of the present invention.
摘要:
Process for the preparation of hydroperoxides of alkylbenzenes characterized by the fact that the alkyibenzene reacts with oxygen in the presence of a catalytic system consisting of an N-hydroxyimide associated with a peroxide activator having a peracid or dioxyrane structure, possibly generated in situ.
摘要:
The invention relates to a new process which allows the preparation of TS-1 zeolites in a pure phase and with a crystallinity higher than 95%, operating at reduced reaction volumes, and obtaining high productivities and extremely high crystallization yields. The particular crystalline form of the TS-1 zeolite thus prepared, is also described.
摘要:
Expandable vinyl aromatic polymers comprising: a) a matrix obtained by polymerizing 50-100% by weight of one or more vinyl aromatic monomers and 0-50% by weight of at least one co-polymerizable monomer; b) 1-10% by weight calculated with respect to polymer (a), of an expanding agent englobed in the polymeric matrix; c) 0.01-20% by weight, calculated with respect to polymer (a), of a filler including carbon black, electrically conductive, with a surface area, measured according to ASTM D-3037/89, ranging from 5 to 200 m2/g.
摘要:
Process for the preparation of viscosity index improver (V.I.I.) additives of lubricating oils which comprises a mixing treatment under high shear conditions of a composition comprising: (i) one or more EP(D)M polymers (ii) one or more polyvinylarene/ conjugated hydrogenated polydiene/polyvinylarene block copolymers; and (iii) lubricating oil, (ii) being present in a concentration of 1.5 to 20% by weight whereas (iii) is present in a concentration ranging from 1.5 to 45% by weight.