摘要:
Catalytic isomerisation of fatty acid esters to form branched fatty acid esters comprises the steps of contacting a feedstock having at least one fatty acid ester with a catalyst and isolating from other reaction products branched fatty acid esters that are produced. The catalyst is a crystalline porous silicoaluminophosphate catalyst having silicon, aluminum, and phosphorous atoms in lattice framework positions. The branched fatty acid esters formed thereby demonstrate properties suitable for use in various applications.
摘要:
The present invention provides an improved process for the preparation of carbamates with high selectivity of pharmaceutical interest by an eco-friendly, non-toxic, phosgene-/isocyanate-/CO-free clean route through a reaction of amine, organic halide compound and carbon dioxide in the presence of a solid, reusable catalyst at moderate conditions and does not require additional cocatalyst/promoter as well as solvent.
摘要:
The present invention relates to a process for the preparation of cyclic carbonates comprising contacting an epoxide with CO2 in the presence of a titanosilicate catalyst and a base co-catalyst at a temperature above 313 K and a pressure above 2 bar for a period of 0.5 to 8 hrs and isolating the formed cyclic carbonate from the reaction mixture by conventional methods.
摘要:
This invention relates to a process for the oxidation of phenol to a mixture of hydroquinone and catechol using hydrogen peroxide as oxidant in the presence of titanium silicate molecular sieves in a multistage fixed bed reactor.
摘要:
The invention discloses a process for production of linear alkylbenzenes which comprises contacting a mixture of benzene linear olefins and hydroen with a catalyst containing a transition metal like iron, cobalt, nickel, platinum, palladium, iridium or mixtures thereof in intimate contact with a zeolite such as mordenite, beta X, Y or ZSM-12 and separating the linear alkylbenzenes from the reactor effluents. The present invention introduces the manufacture of LAB using solid catalyst under condition wherein the catalyst is not deactivated and hence leading to normal operation cycle lengths between successive regeneration which are substantially longer than those in prior art.
摘要:
Gallium-niobium oxide catalysts are disclosed herein for converting linear olefinic hydrocarbons to branched olefinic hydrocarbons through isomerisation, the latter being capable for use fuel for their desirable properties.
摘要:
The present invention provides a process for the preparation of biofuels or biofuel additives from glycerol. More particularly, it provides a process for the preparation of glycerol-ethers by etherification of glycerol with an alcohol in the presence of solid acid catalyst.
摘要:
The present invention provides an improved process for the preparation of lubricants from vegetable oil or fat obtained from animal source. The present invention involves a reaction of vegetable oil or fat with an alcohol in the presence of a double metal cyanide catalyst, at a temperature in the range of 150° to 200° C. for a period of 3-6 hrs to obtain the desired bio-lubricant.
摘要:
The present invention provides a process for the preparation of dialkyl carbonates of general formula (1) wherein R=alkyl (C1-C8) or C6H5CH2 the said process comprises a reaction in between cyclic carbonate and alcohol, in the presence of a solid, double metal cyanide complex catalyst, at a temperature in the range of 140-180° C., for a period of 4-10 hrs, followed by the separation of catalyst from the above said reaction mixture by known methods to obtain the desired product.
摘要:
The present invention relates to the preparation of an aromatic carboxylic acid by contacting an alkyl aromatic compound with an oxygen containing gas in the presence of a encapsulated oxo-bridged organometallic cluster catalyst.