摘要:
A method for making crystalline aluminosilicate ZSM-34 zeolites, useful as catalysts for making C.sub.2 -C.sub.4 -olefins from methanol, from a reaction mixture containing silicon, aluminum, sodium, potassium, and an organic template compound which is (i) a salt of an ammonium compound of di-, tri-, or tetra-ethanolamine or (ii) a mixture of at least one of diethanolamine and triethanolamine with certain lower alkanols, lower alkylene diols, or lower alkyl iodides, sulfates, or p-toluenesulfonates.
摘要:
The present invention relates to aluminosilicates and silica gels having a low content of transition elements, to a process for their manufacture and to their use as a catalysts or catalyst supports. Said aluminosilicates or silica gels are prepared by treating them with a solution of complexing agents at a temperature of from 70.degree. to 150.degree. C. The manufacture of low-molecular-weight olefins from methanol is one possible application field of said aluminosilicates, used as a catalyst.
摘要:
The invention relates to a process for the manufacture of glyoxylic acid esters by catalytic dehydrogenation of glycolic acid esters in the gaseous phase.
摘要:
The invention relates to a process for the isomerization of o-, m- or p-toluidine, or of a mixture of them, on a zirconium-containing zeolite catalyst of the pentasil type. Catalysts of this type are distinguished by particularly high activity and a long useful life. The invention particularly relates to the preparation of m-toluidine by isomerization of o- and/or p-toluidine on zirconium-containing zeolite catalysts of the pentasil type.
摘要:
Methyl glyoxal is prepared by oxidation of propylene glycol-1,2 in the gaseous phase on a heterogeneous catalyst. The process is carried out with an excess of oxygen and the catalyst used contains molybdenum and at least one of the metals: vanadium, silver, copper, iron, tungsten, tin, zinc, alkali metals, alkaline earth metals.
摘要:
The invention relates to a process for isomerizing monochlorophenols or dichlorophenols in which one or more monochlorophenol or dichlorophenol is passed in the gas phase over a zeolite catalyst. In particular, the invention relates to a process for preparing 3-chlorophenol by isomerizing 2-chlorophenol and/or 4-chlorophenol and to a process for preparing 2,5-dichlorophenol by isomerizing 2,4-dichlorophenol using said method.
摘要:
The invention relates to a process for isomerizing monochlorotoluenes or dichlorotoluenes on a zirconium-containing zeolite catalyst of the Pentasil type. Catalysts of this type are distinguished by a particularly high activity coupled with a long service life. In particular, the invention relates to the preparation of a mixture 3-chlorotoluene and 4-chlorotoluene by isomerizing 2-chlorotoluene on zircoium-containing zeolite catalysts of the Pentasil type.The invention also relates to the preparation of a mixture of 2,5-dichlorotoluene and 3,4-dichlorotoluene by appropriate isomerization of 2,4-dichlorotoluene, and to the preparation of a mixture of 2,4-dichlorotoluene and 2,5-dichlorotoluene by appropriate isomerization of 3,4-dichlorotoluene.
摘要:
The invention relates to a hydraulic accumulator, comprising an accumulator housing (1), in which a bellows (21) having a selectable number of pleats (23) forms a mobile separation element between the gas side (25) and the fluid side (13), characterized in that a distancing device (33) is provided arranged inside the accumulator housing (1), and is fluidically connected to the inside of the bellows (21) or abuts to the bellows (21), thus forming an additional medium chamber.
摘要:
A pressure vessel which is provided preferably for use in bladder accumulators (27), having a multi-part vessel body (1) composed of a tubular central part (3) which, at at least one of its two ends, has a termination region (5, 7), is characterized in that a cover part (9) which at least partially forms the respective termination region (5, 7) engages at the edge over the central part (3), at least in the region of the respectively assignable end (13, 15) thereof, so as to form a fixed connection.