.~.~> Using extraneous agent in reaction zone, e.g., catalyst, etc. {2}
DEFINITION
Classification: 585/483
By dealkylation:
(under subclass 400) Subject matter wherein a side-chain is wholly or partially removed from the ring of an aromatic, e.g., the demethylation of ethylbenzene or xylene to form toluene and/or benzene, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
404+, for a process wherein a ring component at the end of the process has more carbons in the ring or less carbons in the ring than at the start of the process.
470, for a process wherein an alkyl group removed from one hydrocarbon molecule is attached to another molecule, i.e., dealkylation using a hydrocarbon acceptor for the removed alkyl moiety.
476+, for a process wherein a ring of a polycyclic aromatic is opened with or without partial or complete removal of carbon atoms from the resulting side-chain.
800+, for a process wherein an aromatic compound feedstock is purified by cracking the nonaromatic impurities.
