摘要:
The invention relates to a method for formulation of a synthetic gas oil or an additive for gas oil in which an alkyl-aromatic compound or a mixture of alkyl-aromatic compounds is selected based on at least one parameter that is selected from the group that consists of the number of cycles of the aromatic core, the number of alkyl chains that are grafted to the aromatic cycle, the length of the alkyl chain or chains, the position of the aromatic cycle or cycles on the alkyl chain or chains of said alkyl-aromatic compound or compounds such that the cetane number of the synthetic gas oil or the additive for gas oil is greater than 30. The invention also relates to a process for the production of alkyl-aromatic compounds for use as a gas oil or additive.
摘要:
A process is described for producing phenylalkanes by alkylating at least one aromatic compound using at least one linear olefin containing 9 to 16 carbon atoms per molecule. The alkylation reaction is carried out in the presence of at least two different catalysts used in at least two distinct reaction zones. The selectivity for a monoalkylated products of the catalyst contained in the first reaction zone is lower than that for the catalyst contained in the second reaction zone located downstream of the first in the direction movement of the fluids.
摘要:
A process for the production of at least one isomer of xylenes comprising a simulated moving-bed adsorption (8) of a C8-aromatic feedstock (1) that delivers a paraxylene-rich fraction (9) that is optionally purified after a distillation (16) by at least one high-temperature crystallization (5) and a fraction (10) that is low in paraxylene is described. Fraction (10) is distilled and then isomerized (21) in the presence of an EUO-structural-type catalyst. The lightest hydrocarbons are removed from the isomerization effluent in a first distillation (23) then naphthenes in a second distillation (26), and distilled isomerization effluent (2) that results therefrom is recycled at least in part in adsorption (8). A mother liquor (3) that results from the crystallization stage is recycled at least in part in adsorption (8).
摘要:
Disclosed are reactions for the aromatization of hydrocarbons containing 2 to 9 carbon atoms per molecule, with a composite catalyst containing:an MFI zeolite in hydrogen form, the framework containing at least one of the elements silicon, aluminum and/or gallium; a matrix; gallium; at least one noble metal of the platinum family, at least one additional metal selected from the group made up of tin, germanium, indium, copper, iron, molybdenum, gallium, thallium, gold, silver, ruthenium, chromium, tungsten and lead, and possibly a compound selected from the group made up of alkali and alkaline earth metals.
摘要:
Microporous crystallized gallium phosphate and its substituted derivatives, characterized by:a) the following approximate general formula:R.sub.r Ga.sub.g P.sub.p X.sub.x O.sub.2 F.sub.f hH.sub.2 O where the sum of g, p and x is equal to 1, and whereg is a number from 0.3 to 0.5,p is a number from 0.3 to 0.52,x is a number from 0 to 0.4,r is a number from 0.01 to 0.2,f is a number from 0.01 to 0.2,h varies according to the degree of hydration of the solid, from 0 to 0.5.R is an organic compound selected from the group formed by cyclic amines,X is a heteroatom selected from the group formed by the elements: Li, Be, Co, Mg, Mn, Zn, Al, B, Cr, Fe, Ge, Si, Ti, As and Vb) an X-ray diffraction diagram shown in Table 1 of the description,and a method of preparing them.
摘要:
A process for the manufacture of a linear polyethylene with narrow molecular-weight distribution comprising polymerizing ethylene alone or a mixture of ethylene and an alpha-olefin in which ethylene represents at least about 70% by weight of the total monomers involved, in a gas-phase polymerization medium in the presence of a catalytic component containing at least one transition metal, magnesium, and a halogen, a co-catalyst comprising an alkylaluminum compound, and a monoether, the monoether having the general formula R'OR", wherein R' and R" are the same or different and each is a C.sub.1 to C.sub.8 linear or branched hydrocarbon radical or being a cyclic monoether with the oxygen forming a ring having 4 to 12 carbon atoms.