摘要:
An active component carrier composition is disclosed comprising a mixture of one or more catalytically active components and one or more oxidized disulfide oil (ODSO) compounds, including a water-soluble fraction of ODSO. In certain embodiments the ODSO is obtained from the effluent of an enhanced MEROX process. The active component carrier composition facilitates transfer of catalytically active components (or components that will be catalytically active in the finished solid catalyst material) onto the surface of support materials.
摘要:
A subject-matter of the present invention is a process for the regeneration of a catalyst comprising at least one metal from Group VIII and at least one metal from Group VIB which are deposited on a refractory oxide support, comprising: at least one first step of heat treatment of the catalyst in the presence of oxygen and at a temperature ranging from 350° C. to 550° C.; at least one second step of deposition, at the surface of the catalyst, of one or more additive(s) of formula (I):
摘要:
The present invention relates to a novel method for conducting phase transfer catalysis in a multiphase reaction system wherein the different phases are separated by a membrane permeable to the phase transfer catalyst and its various reaction complexes. The invention also relates to membranes and a membrane-containing apparatus useful in carrying out phase transfer catalysis.
摘要:
A hydrosilation catalyst is provided having platinum atoms anchored onto a hydroxylated oxide of silicon or aluminum by Pt-S linkages through sulfur organo siloxy groups. A hydrosilation method and a method for making such platinum catalyst is also provided.
摘要:
A functionalized solid product containing sulphonate or sulphonic acid groups is prepared from an inorganic oxide containing surface hydroxy groups, e.g. silica by reacting the latter in a first stage with a haloalkyl alkoxy- or aryloxysilane. The first stage product is then reacted with an aqueous solution of an inorganic sulphite to give a product containing sulphonate groups. These can be converted to sulphonic acid groups by an optional third stage treatment with dilute mineral acid. The final products are suitable for use as adsorbent materials or catalyst supports.
摘要:
a process is provided in which a solid compound of a transition metal of Groups IVA to VIA is ground with at least one polymeric material containing sulphone groups and containing at least two repeat units of the formula:--Ar--SO.sub.2 --in which Ar is a bivalent aromatic radical and may vary from unit to unit in the polymer chain. The Ar radical preferably contains two aromatic rings linked together, as in: ##STR1## where X is an O or S atom, a direct link or the residue obtained by removing H from each --OH group present in an aromatic diol. If Ar varies the material is a copolymer. The polymeric material can be a polyethersulphone.The transition metal can be zirconium, vanadium or titanium. Preferably the transition metal compound is a halide such as titanium trichloride.
摘要:
An active component carrier composition is disclosed comprising a mixture of one or more catalytically active components and one or more oxidized disulfide oil (ODSO) compounds, including a water-soluble fraction of ODSO. In certain embodiments the ODSO is obtained from the effluent of an enhanced MEROX process. The active component carrier composition facilitates transfer of catalytically active components (or components that will be catalytically active in the finished solid catalyst material) onto the surface of support materials.
摘要:
Provided are a titanium dioxide-coated upconverting nanoparticle (UCNP) and a photocatalyst complex containing a gold nanorod (GNR) combined with the titanium dioxide-coated UCNP.
摘要:
The invention provides a process for the preparation of a carbonyl compound in high efficiency by oxidizing an alcohol. The process for the preparation of a carbonyl compound of the present invention includes a step of oxidizing an alcohol in the presence of a compound of the formula (I) or a derivative or a salt thereof, and an oxidant, wherein R1 and R2 independently represent hydrogen, a halogen, a nitro or acidic group, or an alkyl or alkoxy group, each of which optionally has a substituent, or R1 and R2 combine the two carbon atoms to which they are boned to form an aromatic ring.
摘要:
A subject-matter of the present invention is a process for the regeneration of a catalyst comprising at least one metal from Group VIII and at least one metal from Group VIB which are deposited on a refractory oxide support, comprising: at least one first step of heat treatment of the catalyst in the presence of oxygen and at a temperature ranging from 350° C. to 550° C.; at least one second step of deposition, at the surface of the catalyst, of one or more additive(s) of formula (I):