Ronald W Vaughan

US Patent:

43179495, Mar 2, 1982

Filed:

Feb 23, 1976

Appl. No.:

5/660634

Inventors:

Ronald J. Vaughan - Claremont CA

Assignee:

Varen Technology - Marshallton DE

International Classification:

C07C 266
C07C 270

US Classification:

585458

Abstract:

This invention relates to conversion processes which take place in the presence of solid acid catalysts, e. g. , hydrocarbon conversion processes. More specifically, this invention relates to a process for the alkylation of organic compounds, preferably aromatic and paraffinic hydrocarbons, with alkylating agents, e. g. , alkyl chlorides, alkyl sulfonates, alkyl epoxides, alkynes, etc. , in the presence of a polyfluorosulfonic acid catalyst. In one preferred embodiment of the instant process the selectivity to the monoalkylated reaction product of said organic compound and said alkylating agent is maximized by (1) refluxing a mixture comprising said compound and the alkylated derivative thereof, (2) separating from the mixture of step (1) an overhead product comprising said organic compound, said overhead product being substantially free from said alkylated derivatives, (3) condensing said overhead product, (4) contacting said condensed overhead product with said alkylating agent in the presence of a polyfluorosulfonic acid catalyst, at conditions whereby a portion of said organic compound is reacted to form the alkylated derivative thereof, and (5) returning the resultant mixture of the organic compound and its alkylated derivative to the refluxing mixture of step (1). Fresh organic compound may be continuously added to said refluxing mixture while continuously withdrawing said alkylated derivatives. Preferably said organic compound is benzene and said olefin is selected from the group consisting of ethylene and propylene.

US Patent:

39767043, Aug 24, 1976

Filed:

Jan 6, 1975

Appl. No.:

5/538723

Inventors:

Ronald J. Vaughan - Claremont CA

Assignee:

Varen Technology - Marshallton DE

International Classification:

C07C 7910

US Classification:

260645

Abstract:

This invention relates to a process for the nitration of organic compounds, especially aromatic compounds, which comprises contacting said compound with a nitrating agent at conditions whereby a nitrated product is formed. The nitration agent and the compound are substantially separated by means of a polymeric membrane, said polymeric membrane preferably comprising sulfonic acid groups, pendant to the polymeric backbone. In a most preferred embodiment, the membrane is a perfluorosulfonic acid polymer. The use of this most preferred polymeric material as a membrane in the instant process allows the nitration of aromatic organic compounds to take place without the incorporation of strong sulfuric acid in the nitrating agent.