Brian Ross Pope

US Patent:

43037941, Dec 1, 1981

Filed:

Dec 22, 1980

Appl. No.:

6/219146

Inventors:

Brian G. Pope - Baton Rouge LA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C07C125073

US Classification:

560 25

Abstract:

A method of separating 4,4'-methylene dimethyl diphenyldicarbamate from its 2,4' and 2,2'-isomers, from methyl phenylcarbamate, from higher phenylcarbamate derivatives, and from related compounds. The mixture is washed with methanol, thereby forming a liquid phase comprising a methanol solution of predominantly 2,4'-isomer, 2,2'-isomer, diphenyldicarbamate, methyl phenylcarbamate, and higher phenylcarbamate derivatives; and a solid phase of substantially 4,4'-methylene dimethyl diphenyldicarbamate. The 2,4'-isomer and 2,2'-isomer may also be separated by using a methanol-water solution wash.

US Patent:

44749511, Oct 2, 1984

Filed:

Sep 27, 1983

Appl. No.:

6/536126

Inventors:

Brian G. Pope - Baton Rouge LA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C08B 1108
C08B 3110
C08B 3700

US Classification:

536 95

Abstract:

The invention is a process for the 2-hydroxyalkylation of a polysaccharide which comprises contacting a polysaccharide with an alkylene carbonate in the presence of a catalytic amount of a quaternary ammonium halide under conditions such that the polysaccharide undergoes hydroxyalkylation.

US Patent:

48572039, Aug 15, 1989

Filed:

Dec 21, 1987

Appl. No.:

7/135420

Inventors:

Brian G. Pope - Baton Rouge LA
Daniel J. Najvar - Baton Rouge LA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B01D 1500

US Classification:

210681

Abstract:

A coal gasifier slag composition, and process utilizing a coal gasifier slag composition for the removal of a metal ion, or the ions of a plurality of metals, from an aqueous medium by contact of said coal gasifier slag composition with said aqueous medium. The coal gasifier slag, which is regenerable by contact with a dilute acid, is employed as a contact mass for the removal from an aqueous medium of a metal ion, or the ions of a plurality of metals, derived from Groups IB through VIIB, IIA through VA, and VIII of the Periodic Table of the Elements. The coal gasifier slag is useful for removing a metal ion, or the ions of a plurality of metals, from industrial waste water, groundwater, mine water and the like, or as a landfill, or as a protecting layer adjacent to or surrounding land fills, surface impoundments, tank farm beds and the like.

US Patent:

46509089, Mar 17, 1987

Filed:

Dec 23, 1985

Appl. No.:

6/812626

Inventors:

Brian G. Pope - Baton Rouge LA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C07C 4558

US Classification:

568427

Abstract:

This invention relates to the isomerization of monoaryl-ethylene oxide in the presence of water over a silica gel catalyst. Reaction temperatures are relatively low, i. e. , 160. degree. C. to about 180. degree. C.

US Patent:

47147229, Dec 22, 1987

Filed:

Aug 20, 1986

Appl. No.:

6/898858

Inventors:

Daniel J. Najvar - Baton Rouge LA
Brian G. Pope - Baton Rouge LA
Norman R. Loeffler - Tulsa OK

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C08J 932

US Classification:

523218

Abstract:

A method for accelerating the dehydration of aqueous dispersions and bonding the solids contained therein characterized by the addition of fly ash to the aqueous polymeric composition. The fly ash is added in an amount sufficient to significantly reduce the dehydration time of the composition and generally comprises at least a partial substitution of the mineral filler content of the aqueous polymeric dispersion.