Abstract:
Berylloaluminosilicates having faujasite structure are described. These beryllium zeolites (Y-zeolites) can have substantially higher Al2O3/SiO2 ratios than the berylliumfree aluminosilicates of similar structure; they can be obtained hydrothermally from aqueous mixtures of the components and can be used instead of the faujasites in industrial processes involving absorption or catalysts.
Abstract translation:描述了具有八面沸石结构的铍铝硅酸盐。 这些铍沸石(Y-沸石)可以具有比类似结构的无铍铝硅酸盐更高的Al 2 O 3 / SiO 2比率; 它们可以由组分的水混合物水热获得,并且可以用于涉及吸收或催化剂的工业过程中的八面沸石。
Abstract:
Gases of various origins which contain carbon monoxide and dioxide and hydrogen, for example the gases obtained by steam reforming or the rich gas process, refinery gases or coal gasification gases are methanized on a nickel catalyst. The object of this reaction is to obtain methane or gases which can be substituted for natural gas. To produce the catalyst, the compound Ni6Al2(OH)16.CO3.4H2O is obtained from aqueous solution. The catalyst is obtained from this compound after drying, calcination and subsequent reduction in a stream of hydrogen, whilst maintaining very specific temperature gradients between the drying stage and the calcination stage.
Abstract:
The double salt Ni6Al2(OH)16 - CO3 - 4H2O is obtained from an aqueous solution containing nickel and aluminum salts by precipitation with alkali metal carbonate or bicarbonate. This double salt (catalyst precursor) is dried, calcined and reduced. There is thus obtained a catalyst which is suitable for the selective hydrogenation of fats and oils.
Abstract:
PCT No. PCT/EP97/01113 Sec. 371 Date Sep. 4, 1998 Sec. 102(e) Date Sep. 4, 1998 PCT Filed Mar. 5, 1997 PCT Pub. No. WO97/32866 PCT Pub. Date Sep. 12, 1997A noble metal-free catalyst composition is obtainable by a) preparing an aqueous mixture comprising i) a salt of at least one base metal selected from among the elements having atomic numbers 21-32, 39-42, 48-51, 57-75 and 81-83; ii) phosphate ions; and iii) at least one nitrogen source; and b) evaporating the aqueous mixture obtained and drying the catalyst composition thus formed. The catalyst composition prepared can be used for producing hydrogen peroxide and for the epoxidation of olefins.
Abstract:
O.Z. 0050/033725 of the disclosure: A process for the preparation of C2-C5-olefins from crude methanol and/or dimethyl ether by catalytic conversion at an elevated temperature in the presence of a zeolite-containing catalyst, wherein the zeolite has been prepared from technical-grade waterglass with the aid of hexamethylenediamine, without addition of a metal salt. The raw material used for the process is undiluted crude methanol and/or dimethyl ether.
Abstract:
PCT No. PCT/EP97/01113 Sec. 371 Date Sep. 4, 1998 Sec. 102(e) Date Sep. 4, 1998 PCT Filed Mar. 5, 1997 PCT Pub. No. WO97/32866 PCT Pub. Date Sep. 12, 1997A noble metal-free catalyst composition is obtainable by a) preparing an aqueous mixture comprising i) a salt of at least one base metal selected from among the elements having atomic numbers 21-32, 39-42, 48-51, 57-75 and 81-83; ii) phosphate ions; and iii) at least one nitrogen source; and b) evaporating the aqueous mixture obtained and drying the catalyst composition thus formed. The catalyst composition prepared can be used for producing hydrogen peroxide and for the epoxidation of olefins.
Abstract:
The invention concerns a catalyst composition which is free from noble metal s and is obtained by: a) preparing an aqueous mixture which comprises: i) a sa lt of at least one base metal selected from elements having the atomic numbers 21 to 32, 39 to 42, 48 to 51, 57 to 75 and 81 to 83; ii) phosphate ions; and ii i) at least one nitrogen source; and b) concentrating the aqueous mixture produced and drying the resultant catalyst compound. The invention further concerns the preparation of this composition and its use in the production o f hydrogen peroxide and the epoxidation of olefins.