James Clifford Bentley

US Patent:

46652574, May 12, 1987

Filed:

Oct 20, 1986

Appl. No.:

6/920650

Inventors:

James H. Bentley - Huntsville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

C07C 120

US Classification:

585469

Abstract:

A high yield, four step synthesis process is disclosed for producing the omer, 2,3-diphenyl-1,3-butadiene, wherein in step 1 acetophenone pinacol is produced from the dimerization of acetophenone in 96% yield; in step 2 acetophenone pinacol is reacted with triethoxymethane and benzoic acid to produce 2,3-diphenyl-2-butene in about 88-96% yield. The 2,3-diphenyl-2-butene and N-bromosuccinimide (NBS) are reacted together in step 3 in an ultra violet reactor and in a CCl. sub. 4 reaction solvent to produce in about 92% yield, the dibromo compound, 1,4-dibromo-2,3-diphenyl-2-butene. In step 4, 1,4-dibromo-2,3-diphenyl-2-butene is converted to the desired monomer in about 86% yield by reacting with NaI under refluxing conditions for about 90 minutes in a hot acetone solution. The monomer 2,3-diphenyl-1,3-butadiene is recovered in hexane, shaken (in the order listed) with water solutions of NaHSO. sub. 3, NaHCO. sub. 3, and pure water, dried over CaCl. sub.

US Patent:

46111425, Sep 9, 1986

Filed:

Dec 21, 1984

Appl. No.:

6/684835

Inventors:

James H. Bentley - Huntsville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01J 1716
H01J 1728

US Classification:

313 30

Abstract:

A self pumping spark gap that switches high voltage current in large amou and provides for a flow of gas by use of one way valves. The valves open and close in accordance with changes in pressure experienced during the sparking sequence.