Allan S Sass

42818770, Aug 4, 1981

Nov 2, 1979

6/090634

Allan Sass - Los Angeles CA

Occidental Oil Shale, Inc. - Grand Junction CO

E21C 4110

299 2

A subterranean formation containing oil shale is prepared for in situ retorting by forming a fragmented permeable mass of formation particles containing oil shale in an in situ oil shale retort site. Formation is initially excavated from the retort site for forming one or more voids extending horizontally across the retort site, leaving a zone of unfragmented formation adjacent such a void. In one ambodiment, an array of rocks bolts are anchored in at least a portion of the roof adjacent such a void for providing reinforcement of unfragmented formation above the void. Vertical blasting holes are drilled in the zone of unfragmented formation adjacent the void. Explosive is placed in the blasting holes and detonated for explosively expanding the zone of unfragmented formation toward the void, including the rock bolted portion of the roof, for forming at least a portion of a fragmented permeable mass of formation particles containing oil shale in an in situ oil shale retort. Surprisingly, the rock bolting does not interfere with, and in some instances can improve, fragmentation compared with comparable blasts without such rock bolts. The reinforcement provided by the rock bolts can reduce or eliminate the need for roof support pillars in horizontal voids at intermediate levels of the retort site.

40544214, Oct 18, 1977

Apr 30, 1976

5/681900

Leon Robinson - Upland CA
Allan Sass - Los Angeles CA

Occidental Research Corporation - La Verne CA

C10L 910
C10B 5700

44 1F

This invention covers a process for reducing the sulfur content of char by washing the char with an acid followed by treatment with hydrogen gas.

43222226, Mar 30, 1982

Sep 3, 1980

6/183777

Allan Sass - Los Angeles CA

Occidental Petroleum Corporation - Los Angeles CA

C10J 346

48197R

Carbonaceous material is gasified in a first pyrolysis zone substantially in an absence of free oxygen by heating with a solid heating media. The carbonaceous material is conducted through the first pyrolysis zone in turbulent flow to provide for the rapid transfer of heat to effect the gasification. Gaseous products are recovered while char products are introduced into a second pyrolysis zone for additional gasification. The second pyrolysis zone is maintained substantially free of free oxygen. Gasification in the second pyrolysis zone is effected by the transfer of heat from a heating media to the char products produced in the first pyrolysis zone. Gaseous products from the second pyrolysis zone are recovered. The char products from the second pyrolysis zone can be heated to a temperature sufficient for use as a solid heating media. The gaseous product from the first pyrolysis zone, after separation from the char product, can be cooled to a lower temperature to condense a liquid product therefrom.

44497539, May 22, 1984

Jun 1, 1982

6/383508

Thomas E. Ricketts - Grand Junction CO
Allan Sass - Los Angeles CA

Occidental Oil Shale, Inc. - Grand Junction CO

E21B 43247
E21C 4110

299 2

A method for forming an in situ oil shale retort in a subterranean formation containing oil shale is provided. The in situ oil shale retort has top, bottom, and generally vertically extending side boundaries of unfragmented formation and contains a body of expanded oil shale formation that completely fills the retort to its top boundary. The retort is bulked full by explosively expanding a layer above a fragmented permeable mass of formation particles forming part of the body of expanded formation in the retort. The layer is expanded with an available void fraction of no more than about ten percent.

41557158, May 22, 1979

Sep 6, 1977

5/830742

Allan Sass - Los Angeles CA
Hans F. Bauer - Diamond Bar CA
Norman W. Green - Upland CA

Occidental Petroleum Corporation - Los Angeles CA

C10L 910
C10B 5700

44 1F

This invention covers an improved hydrodesulfurization process which significantly reduces the organic sulfur content of char by first magnetically or electrostatically removing iron sulfides and precursors of iron sulfides from char and then hydrodesulfurizing the remaining char.

42291852, Oct 21, 1980

Nov 10, 1975

5/630557

Allan Sass - Los Angeles CA

Occidental Petroleum Corporation - Los Angeles CA

C10J 346

48197R

Carbonaceous material is gasified in a first pyrolysis zone substantially in an absence of free oxygen by heating with a solid heating media. The carbonaceous material is conducted through the first pyrolysis zone in turbulent flow to provide for the rapid transfer of heat to effect the gasification. Gaseous products are recovered while char products are introduced into a second pyrolysis zone for additional gasification. The second pyrolysis zone is maintained substantially free of free oxygen. Gasification in the second pyrolysis zone is effected by the transfer of heat from a heating media to the char products produced in the first pyrolysis zone. Gaseous products from the second pyrolysis zone are recovered. The char products from the second pyrolysis zone can be heated to a temperature sufficient for use as a solid heating media. The gaseous product from the first pyrolysis zone, after separation from the char product, can be cooled to a lower temperature to condense a liquid product therefrom.

40532852, Oct 11, 1977

Jan 15, 1976

5/649355

Leon Robinson - Houston TX
Allan Sass - Los Angeles CA

Occidental Research Corporation - La Verne CA

C10L 910
C10B 5700

44 1F

This invention covers a process for reducing the sulfide sulfur content of char by treatment with a gaseous mixture of carbon dioxide and H. sub. 2 O.

41475933, Apr 3, 1979

Mar 10, 1977

5/776234

Robert W. Frischmuth - Huntington Beach CA
Allan Sass - Los Angeles CA

Occidental Petroleum Corporation - Los Angeles CA

C10B 4916
C10B 5302

201 21

Essentially carbon free inorganic particles formed from the decarbonization of a carbon containing solid residue of pyrolysis of comminuted organic solid waste is employed as the prime heat source for the pyrolysis of the comminuted organic solid waste.