US 4,360,565 AGranted

Iron-containing refractory balls for retorting oil shale

AssigneePhillips Petroleum Company

InventorLyle W. Pollock

Life of this patent

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Abstract

Iron-containing refractory balls, in a retorting process for oil shale, permit effective magnetic separation of the balls from the spent shale.

Claims5

Dependent claims

Iron-containing ceramic balls having a diameter of about 1/8" to 2" and containing about 10 to 90 weight percent iron, said ceramic content of said balls being a high temperature fired high-refractory alumina, wherein said iron-containing ceramic balls are characterized in cross-section by an alumina ceramic core, shell of iron particles around said core, and an outer coating of alumina ceramic.

Dependencies are inferred from the claim text.

Facts

Application: 06/009,627Filed 6 Feb 1979 · division
Priority: 28 Sep 1977
Granted: 23 Nov 1982
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

C10B 53/06
Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form: of oil shale and/or or…
C10G 1/02
Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal: by…
Y10T 428/2993
Coated: silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
C10B
Destructive distillation of carbonaceous materials for production of gas, coke, tar, or

Family

Serial837,130Parent of this division · filed 28 Sep 1977
US 4,160,719 AParent of this division · filed 10 Jul 1979
US 4,360,565 AThis patent

From the US filing history. Foreign family members aren’t listed.

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