MR. ROBERT RONALD MEYER, DC
Chiropractic in Austin, TX

4971661, Nov 20, 1990

Oct 20, 1989

7/424423

Robert A. Meyer - Austin TX
Kenneth P. Keating - Georgetown TX
William A. Smith - Austin TX
Robert M. Steinberg - Houston TX

Texaco Chemical Company - White Plains NY

B01D 340, C07D30102

203 54

An impure propylene oxide feedstock contaminated with from about 50 to about 1000 ppm of methanol and from about 0 to about 1 wt. % of acetone is charged to the lower half of an extractive distillation column containing at least about 25 theoretical plates and an extractive distillation agent consisting essentially of a blend of acetone and water (acetone/water blend) containing about 20 to about 30 wt. % of acetone and, correspondingly, about 80 to about 70 wt. % of water is charged to the tower at a point 4 to 7 theoretical stages above the impure propylene oxide feed point; the extractive distillation agent being introduced into the extractive distillation column in the ratio of said feedstock to said extractive distillation agent of from about 5:1 to about 20:1, whereby an overhead distillate fraction is obtained consisting essentially of propylene oxide contaminated with not more than about 60 ppm of methanol, not more than about 0. 02 wt. % of acetone and not more than about 0. 3 wt. % of water.

4977285, Dec 11, 1990

Dec 8, 1989

7/447934

Edward T. Marquis - Austin TX
Kenneth P. Keating - Austin TX
Robert A. Meyer - Austin TX
John R. Sanderson - Leander TX

Texaco Chemical Company - White Plains NY

C07D30132, C07D30819

549529

A heavy distillation fraction comprising tertiary butyl hydroperoxide, tertiary butyl alcohol, impurities and dissolved molybdenum catalyst resulting from the removel of propylene, propylene oxide and tertiary butyl alcohol from an epoxidation reaction product is mixed with about 5 to about 10 wt. %, based on the weight of the heavy liquid distilation fraction, of a lower aliphatic alcohol containing from 1 to 3 carbon atoms to provide a charge mixture, and the charge mixture is: charged to a falling film evaporator and separator therein, under evaporator operating conditions including a temperature within the range of about 20. degree. to about 150. degree. C. and a pressure of about 1 to about 200 mm Hg. , into an overhead vaporized fraction comprising substantially all of the aliphatic alcohol and from about 80 to about 95 wt. % of the heavy distillation fraction charged to the falling film evaporator.

5151530, Sep 29, 1992

Sep 25, 1991

7/765610

Edward T. Marquis - Austin TX
John R. Sanderson - Leander TX
Robert A. Meyer - Austin TX

Texaco Chemical Company - White Plains NY

C07D30132, C07C 2710

549529

The distillation product fraction obtained from an isobutane oxidation reaction product after the removal of unreacted isobutane will contain tertiary butyl hydroperoxide, tertiary butyl alcohol and carboxylic acid contaminants such as formic acid, acetic acid and isobutyric acid. It has been discovered that when the distillation product fraction is treated with about 1/2 to 1 equivalents of calcium oxide and/or calcium hydroxide based on the carboxylic acid content of the distillate product fraction, a portion of the carboxylic acid contaminants will precipitate thus partially purifying the distillation product fraction so that, thereafter, molybdenum precipitation will be substantially inhibited when the thus-treated distillation product fraction is used as a feedstock for an epoxidation reaction wherein tertiary butyl hydroperoxide is reacted with an olefin in the presence of a soluble molybdenum catalyst to provide an olefin epoxide and additional tertiary butyl hydroperoxide.

5093506, Mar 3, 1992

Aug 30, 1989

7/400901

Edward T. Marquis - Austin TX
John R. Sanderson - Leander TX
Robert A. Meyer - Austin TX

Texaco Chemical Company - White Plains NY

C07D30132

549529

The distillation product fraction obtained from an isobutane oxidation reaction product after the removal of unreacted isobutane will contain tertiary butyl hydroperoxide, tertiary butyl alcohol and carboxylic acid contaminants such as formic acid, acetic acid and isobutyric acid. It has been discovered that when the distillation product fraction is treated with about 1/2 to 1 equivalents of calcium oxide and/or calcium hydroxide based on the carboxylic acid content of the distillate product fraction, a portion of the carboxylic acid contaminants will precipitate thus partially purifying the distillation product fraction so that, thereafter, molybdenum precipitation will be substantially inhibited when the thus-treated distillation product fraction is used as a feedstock for an epoxidation reaction wherein tertiary butyl hydroperoxide is reacted with an olefin in the presence of a soluble molybdenum catalyst to provide an olefin epoxide and additional tertiary butyl hydroperoxide.

4992566, Feb 12, 1991

Aug 31, 1989

7/401381

Edward T. Marquis - Austin TX
Kenneth P. Keating - Georgetown TX
John R. Sanderson - Leander TX
Robert A. Meyer - Austin TX

Texaco Chemical Company - White Plains NY

C07D30119

549529

Tertiary butyl hydroperoxide and tertiary butyl alcohol are recovered from the reaction product formed by reacting excess propylene with tertiary butyl hydroperoxide in solution in tertiary butyl alcohol in the presence of a soluble molybdenum catalyst, by fractionating the reaction produce to provide distillate propylene, propylene oxide, and tertiary butyl alcohol fractions and a heavy distillation fraction comprising tertiary butyl hydroperoxide, tertiary butyl alcohol and impurities, including dissolved molybdenum catalyst, the tertiary butyl hydroperoxide and tertiary butyl alcohol being recovered from the heavy distillation fraction by vacuum evaporation under evaporation conditions including a temperature of about 25. degree. to about 160. degree. C. and a pressure of about 2 to about 200 mm Hg.

4810809, Mar 7, 1989

Dec 23, 1986

6/945629

John R. Sanderson - Leander TX
Robert A. Meyer - Austin TX
William A. Smith - Austin TX
Edward T. Marquis - Austin TX

Texaco Inc. - White Plains NY

C00F30119, C00F30132

549529

It has been discovered in accordance in accordance with the present invention that a tertiary butyl alcohol/ditertiary butyl peroxide azeotrope may be recovered from a product containing tertiary butyl alcohol and ditertiary butyl peroxide by distilling the tertiary butyl alcohol product to obtain an overhead fraction containing substantially all of the ditertiary butyl peroxide/tertiary butyl alcohol azeotrope and other contaminants. It has been further discovered in accordance with the present invention that the ditertiary butyl peroxide can be recovered from the distillate fraction by extraction with ethylene glycol (e. g. , in a countercurrent ethylene glycol extraction tower) to provide a ditertiary butyl peroxide product of any desired degree of purity.

4704482, Nov 3, 1987

Jun 27, 1986

6/879660

John R. Sanderson - Leander TX
Edward T. Marquis - Austin TX
Robert A. Meyer - Austin TX
Terry L. Renken - Austin TX

Texaco Inc. - White Plains NY

C07C 2988, C07C 29132, C07C 3112

568922

Motor-fuel grade tertiary butyl alcohol which is prepared, for example, by reacting propylene with tertiary butyl hydroperoxide to form propylene oxide and a tertiary butyl alcohol reaction product contaminated with residual amounts of tertiary butyl hydroperoxide and ditertiary butyl peroxide can be effectively catalytically treated under mild conversion conditions including a temperature of about 80. degree. to 280. degree. C. with an unsupported catalyst composed of nickel, copper, chromia and iron, or the oxides thereof, or a catalyst containing nickel, copper, chromia and iron which is supported on silica in order to substantially selectively convert the two peroxide contaminants to tertiary butyl alcohol and to thereby provide a treated tertiary butyl alcohol product substantially free from contaminating quantities of such peroxides.