Patent ID: 8828916
Filing Date: 2014-09-09
Classification: C07C,C10M,C10N,Y02P

Abstract:
1. A process for preparing an alkylated diphenylamine product using consecutive recycle of recovered nonene, said process comprising: a)recovering residual nonene from an acid clay catalyzed alkylation reaction of nonene with diphenylainine: b) charging diphenylamine and recovered residual nonene from step a) with nonene or isomeric nonene to a reactor with art acid clay catalyst; wherein the charge mole ratio of diphenylamine to total nonene is from about 1:4 to 1:6; c) heating the reactor to a first temperature of from about 175° C. to about 200° C. in the presence of the acid clay catalyst under reactive conditions for a suitable period of time to alkylate a majority of charged diphenylamine; d) reducing the reaction temperature to a second temperature of from about 140° C. to about 160° C. for a suitable period of time such that the total composition contains less than about 1 wt % of unreacted diphenylamine; and e) repeating steps a) through d) three or more times; and further comprising recovering the alkylated diphenylamine product from the reactor, wherein the nonylated diphenylamine product is characterized by having from about 15 to about 30 weight % of the monoalkylate; from about 65 to about 75 weight % of the dialkylate; and from about 5 to about 10 weight % of the trialkylate; and wherein the process is conducted substantially free of halogens.