US PATENT SUBCLASS 585 / 470
.~ By alkyl or aryl transfer between molecules, e.g., disproportionation, etc.

Current as of: June, 1999
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585 /   HD   CHEMISTRY OF HYDROCARBON COMPOUNDS

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
470.~ By alkyl or aryl transfer between molecules, e.g., disproportionation, etc. {3}
471  DF  .~.~> Product is polycyclic, of increased side-chain length, or a specific position polyalkyl benzene isomer {1}
474  DF  .~.~> Plural compounds of different weight become midweight compound, i.e., averaging
475  DF  .~.~> Using crystalline aluminosilicate catalyst

DEFINITION

Classification: 585/470

By alkyl or aryl transfer between molecules, e.g., disproportionation, etc.:

(under subclass 400) Subject matter wherein an alkyl or aryl moiety of a molecule is transferred to another molecule.

(1) Note. Patents are classified herein on the basis of the net result of the process, regardless of the mechanism involved, that is, the process may proceed by dimerization and cracking, as well as by free-radical transfer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

257, 433, 440, 616, and 656, for disproportionation reactions involving the transfer of hydrogen between hydrocarbon molecules or hydrocarbyl moieties.

446+, and 709+, for condensation of two entire molecules or hydrocarbyl moieties to give an alkylated product.

477, 671 and 734, for a process wherein an alkyl attached to one carbon of a molecule is shifted to another carbon of the same molecule.

643+, and 708, for alkyl or alkenyl transfer processes resulting in unsaturated and saturated products, respectively.