摘要:
At least one of propene and butene is oligomerized, preferably dimerized, in an elongate cylindrical reaction zone. A recycle flow and the fresh feed charge are injected tangentially into said reaction zone. The catalyst preferably comprises a nickel compound and a hydrocarbyl aluminum halide.
摘要:
High octane gasoline is obtained from C.sub.3 /C.sub.4 olefinic cuts by a combination of steps: oligomerization of the C.sub.3 fraction, hydroisomerization of 1-butene in the C.sub.4 cut, fractionation of the resultant C.sub.4 cut, hydrogenation of isobutene and alkylation. Resultant fractions are admixed to produce the desired high octane gasoline.
摘要:
Fluorinated impurities are removed from olefin oligomers by extraction with a solid adsorbent; the oligomers have been obtained from monoolefins having 2-4 carbon atoms, in the presence of a catalyst obtained by contacting a bivalent nickel compound with a hydrocarbyl aluminum halide and a trifluoroacetic acid.
摘要:
A process is provided for the production of nonenes or of a nonenes/dodecenes mixture, wherein: propylene is introduced into a liquid reaction phase containing a soluble dimerization catalyst, the temperature is 20.degree.-60.degree. C., at least a portion of the resultant hexenes is recycled and the propylene concentration is maintained between 0.05 and 1% by weight.
摘要:
A process for oligomerizing olefins uses a catalyst composition obtained by contacting (a) bivalent nickel compound with (b) a hydrocarbylaluminum compound of the formula Al R.sub.x X.sub.y where R is a monovalent hydrocarbon radical, X is halogen, x is from 1 to 1.5, y is from 1.5 to 2, x+y being equal to 3, and (c) a Bronsted acid consisting preferably of a halogenocarboxylic acid of the formula R.sub.1 COOH in which R.sub.1 is a halogenoalkyl radical of the formula C.sub.m H.sub.p X.sub.q X being halogen, m an integer from 1 to 3, p being zero or an integer and q being an integer, the condition p+q=2m+1 being fulfilled. A preferred Bronsted acid is of the formula R.sub.2 COOH in which R.sub.2 is a halogenomethyl group of the formula CX.sub.n H.sub.3-n, X being halogen and n an integer from 1 to 3.
摘要:
Process for producing gasoline of high octane number from C.sub.3 and C.sub.4 olefinic cuts, such as those obtained by fractional distillation of a C.sub.3 / C.sub.4 catalytic cracking cut, comprising the steps of:(a) oligomerizing propylene of the C.sub.3 cut to obtain a first gasoline fraction,(b) reacting the isobutene of the C.sub.4 cut with methanol to produce methyl tert.-butyl ether which is separated from the unreacted C.sub.4 hydrocarbons to form a second gasoline fraction,(c) alkylating said unreacted C.sub.4 hydrocarbons with isobutane in the presence of an alkylation catalyst such as hydrofluoric acid, to form a third gasoline fraction, and(d) admixing, at least partially, said first, second and third gasoline fractions, so as to obtain gasoline of high octane number.
摘要:
Process for manufacturing dicyclohexanol propane by hydrogenating, with molecular hydrogen, in the presence of a hydrogenation catalyst, diphenol propane dissolved in 2 ethyl-hexanol, adding water at the end of the reaction, distilling the reaction product and separating from the distillate an aqueous phase and a 2 ethyl-hexanol phase, the latter being reused as solvent for the reaction.