Mark Alan Plummer
Engineers at Dexter Ct, Littleton, CO

5736117, Apr 7, 1998

Sep 29, 1995

8/537204

Mark A. Plummer - Littleton CO
James E. Tackett - Castle Rock CO

Marathon Oil Company - Findlay OH

B01D 5352, C01B 1705

4235731

Recovery of an insoluble polymeric sulfur species from the reaction solution of a hydrogen sulfide conversion process is enhanced by adding a sulfur debonding agent to the hydrogen sulfide conversion reaction solution either at the outset of the process or after conversion of the hydrogen sulfide. Conversion of the hydrogen sulfide initially produces a soluble complex having the polymeric sulfur bound therein. The sulfur debonding agent breaks the soluble complex to produce a free insoluble polymeric species readily separable from the reaction solution by conventional physical means to obtain the desired sulfur product.

3956372, May 11, 1976

Nov 2, 1973

5/412062

John R. Coleman - Robinson IL
Mark A. Plummer - Littleton CO
Carle C. Zimmerman - Littleton CO
Henry J. Pietrzak - Texas City TX
Wayne E. Luetzelschwab - Littleton CO
Kent W. Robinson - Englewood CO
Donald E. Schroeder - Littleton CO

Marathon Oil Company - Findlay OH

C07C14324

260505S

Petroleum sulfonates useful to impart micellar characteristics to mixtures of hydrocarbon and aqueous medium are obtained by reacting a hydrocarbon gas oil feedstock (average molecular weight 250-700; A/AP aliphatic to aromatic proton) ratio 5-50 moles/mole, 30-100% of the feedstock molecules contain aromatic portions and the A/AP ratio of the aromatic portion being about 3-20 moles/mole) with a solution of EDC (ethylene dichloride) containing 0. 1-0. 3 lb. liquid SO. sub. 3 /lb EDC. The SO. sub. 3 concentration is about 0. 1-0. 3 lb. of SO. sub. 3 /lb of gas oil feedstock. Reaction takes place in a back-mix tubular reactor wherein at least about 4 parts of reaction products are recycled per 1 part of reaction products withdrawn and wherein the gas oil feedstock plus recycled reaction products and the SO. sub. 3 /EDC streams entering the reaction zone are in turbulent flow. Velocity ratio of the feedstock plus recycled reaction products stream to the SO. sub.

4147637, Apr 3, 1979

Sep 2, 1977

5/830229

Mark A. Plummer - Littleton CO
Stanley C. Jones - Littleton CO

Marathon Oil Company - Findlay OH

E21B 4322

252 855D

Flooding hydrocarbon-bearing, subterranean formations with micellar systems containing crude oil sulfonates is improved by extracting wax from the micellar system before it is injected into the formation.

4908064, Mar 13, 1990

Jul 27, 1988

7/224979

Mark A. Plummer - Littleton CO

Marathon Oil Company - Findlay OH

C08L 9500

1062811

Asphalt used for road paving containing catalytic cracking catalyst particles which have been burned to remove hydrocarbons deposited thereon during a petroleum catalytic cracking process. The catalyst particles may be present in the asphalt in amounts of from 0. 1% to 5. 0% by weight of the asphalt, but more preferably from 0. 2% to 2. 0% by weight of the asphalt. The particles, which are comprised of crystalline and amorphous silica and alumina and silica-alumina combinations, function to prevent oxidative condensation of the asphalt, thus preventing hardening of the asphalt.

4557803, Dec 10, 1985

Jul 2, 1984

6/627153

Mark A. Plummer - Littleton CO

Marathon Oil Company - Findlay OH

C10G 1108, C10G 4708

208108

A process for producing lower molecular weight products from higher molecular weight hydrocarbon liquid feedstock components is provided wherein the feedstock is contacted with an optimum catalyst comprising a molten salt of a tetrachloroaluminate. Selection of the optimum catalyst is based on the electronegativity of the tetrachloroaluminate catalyst cation.

3964548, Jun 22, 1976

Mar 27, 1975

5/562520

Donald E. Schroeder - Littleton CO
Mark A. Plummer - Littleton CO
Wayne O. Roszelle - Littleton CO

Marathon Oil Company - Findlay OH

E21B 4322

166273

Improved oil recovery by flooding subterranean formations with micellar dispersions; comprised of hydrocarbon, water, cosurfactant, electrolyte, and petroleum sulfonate obtained by sulfonating whole or topped crude oil; is obtained by incorporating within the micellar dispersion about 1. 5 to about 4. 5 wt. % of active sulfonate groups (e. g. --SO. sub. 3 NH. sub. 4 or --SO. sub. 3 Na) which are attached to the petroleum sulfonate. The micellar dispersions of this invention contain an amount of cosurfactant in excess of the amount required to produce a viscosity maximum with the particular micellar dispersion.

4555327, Nov 26, 1985

Jul 2, 1984

6/627154

Mark A. Plummer - Littleton CO

Marathon Oil Company - Findlay OH

C10G 1108, C10G 4708

208108

A process for producing lower molecular weight products from a heavy hydrocarbon feedstock is provided wherein the feedstock is contacted with a molten catalyst system comprising a tetrachloroaluminate catalyst and about 1 to about 25 mole percent water. The reaction is carried out at a pressure of from about atmospheric to about 14,200 kPa and a temperature of from about 350. degree. C. to about 550. degree. C. resulting in increased yields of the lower molecular weight liquid products and lower levels of catalyst residue.

6187172, Feb 13, 2001

May 24, 1999

9/317551

Mark A. Plummer - Littleton CO

Marathon Oil Company - Houston TX

C10C 120

208 44

Adverse effects of asphaltenes in liquid hydrocarbons are reduced by incorporating into the liquid hydrocarbon sufficient concentration, e. g. , about 0. 5 to 5 weight % of a dispersant to disassemble or break up agglomerates of the asphaltenes. The dispersant has a polarity of about 0. 3 to about 3. 2 Debye Units and is preferably selected from the group of toluene, o-xylene, m-xylene, tetralin, furan, phenol, ethyl benzoate, butraldehyde, acetophenone and cyclohexanone.

4581128, Apr 8, 1986

Jan 14, 1985

6/691233

Mark A. Plummer - Littleton CO
Carle C. Zimmerman - Littleton CO

Marathon Oil Company - Findlay OH

C10G 4502

208208R

A sour liquid hydrocarbon feedstock is desulfurized upon contact with a hydrogen gas in the presence of a catalyst to obtain a low sulfur product and a hydrogen sulfide gas by-product. The hydrogen sulfide gas is treated with an anthraquinone which is dissolved in a solvent having a polarity which is greater than 3 Debye units, to produce sulfur and oxygen. The oxygen is used to oxidize a hydrocarbon fuel and produce the hydrogen gas used in the initial desulfurization step.

4592905, Jun 3, 1986

Jan 14, 1985

6/691232

Mark A. Plummer - Littleton CO
Phillip M. Beazley - Littleton CO

Marathon Oil Company - Findlay OH

B01D 5314, C01B 1705, C01B 322

423573R

A hydrogen sulfide gas is converted to sulfur and hydrogen gas by reacting the hydrogen sulfide and with an anthraquinone dissolved in a polar hydrocarbon solvent. The hydrogen sulfide reacts with the anthraquinone to produce sulfur and an anthrahydroquinone. Sulfur is then removed from the solvent. The anthraquinone is regenerated from the anthrahydroquinone yielding hydrogen gas. The anthraquinone is recycled with the solvent to the reaction.