8241 results about "Bromine" patented technology

Dehydrohalogenation processes for the preparation of fluoropropenes from corresponding halopropanes, in which the fluoropropenes have the formula CF3CY═CXNHP, wherein X and Y are independently hydrogen or a halogen selected from fluorine, chlorine, bromine and iodine; and N and P are independently integers equal to 0, 1 or 2, provided that (N+P)=2.

Disclosed in one embodiment is a process for the synthesis of 1,3,3,3-tetrafluoropropene that comprises (a) reacting a compound of formula (I) X1X2 with a compound of formula (II) CF3CH═CH2 to produce a reaction product comprising a compound of formula (III) CF3CHX1CH2X2, wherein X1 and X2 are each independently selected from the group consisting of hydrogen, chlorine, bromine and iodine, provided that X1 and X2 are not both hydrogen; (b) when X2 in formula (III) is not fluorine, fluorinating the compound of formula (III) to produce a reaction product comprising a compound of formula (III) wherein X1 is as described above and X2 is fluorine; and (c) exposing said compound of formula (III) to reaction conditions effective to convert said compound to 1,3,3,3-tetrafluoropropene.

The invention discloses a catalyst which is used when methane is transformed into hydrobromic ether through the bromine oxidation reaction, and the catalyst which is used when preparing heavy hydrocarbons by using the hydrobromic ether further, and belongs to the technology field of the catalyst and the preparation method thereof. The first type of catalyst which is used when the methane is transformed into the hydrobromic ether through the bromine oxidation reaction comprises the preparation step that water-soluble metallic compound precursors such as Rh, Ru, Cu, Zn, Ag, Ce, V, W, Cd, Mo, Mn, Cr, La, etc. are mixed with a silica precursor, the mixture is processed through hydrolyzation, drying and roasting, and then the catalyst is obtained; the first type of catalyst can lead definite masses of reactant composed of the methane, HBr, H2O and oxygen sources (that is O2, air or oxygen-enriched air) to perform the catalytic bromine oxidation reaction, to generate target products such as CH3Br, CH2Br2, etc. The second type of catalyst, which is used when preparing the heavy hydrocarbons by using the hydrobromic ether further, includes the preparation step that molecular sieves such as HZSM-5, HY, H Beta, 3A, 4A, 5A, 13X, etc. load metallic compounds composed of Zn and Mg, so that the catalyst is obtained; the second type of catalyst can lead the methane bromination products composed of the CH3Br and the CH2Br2 to further react so as to generate the heavy hydrocarbons containing C3 to C13 and HBr, wherein, the HBr is used as a circular reaction medium.

This invention relates to a polyalpha-olefin (and hydrogenated analogs thereof) comprising more than 50 mole % of one or more C5 to C24 alpha-olefin monomers where the polyalpha-olefin has: a) 40 mole % or more of mm triads, b) a Bromine number of Y or greater, where Y is equal to 89.92*(V)′°5863, where V is the Kinematic Viscosity of the polyalpha-olefin measured at 100° C. in cSt, and c) 1,2 disubstituted olefins present at 7 mole % or more, preferably having Z mole % or more of units represented by the formula: where j, k and m are each, independently, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, or 22, n is an integer from 1 to 350, and where Z=8.420*Log(V)−4.048, where V is the kinematic viscosity of the polyalpha-olefin measured at 1000 C in cSt This invention also relates to process to produce such polyalpha-olefins.

The present invention relates to novel synthetic methods for the preparation of intermediates of 3{5-[3-(4,6-Difluoro-1H-benzoimidazol-2-yl)-1H-indazol-5-yl]4-methyl-pyridin-3-yl methyl}-ethyl-amine.