Oil shale retorting and off-gas purification

Patent · Tue Oct 03 04:00:00 EDT 1978

OSTI ID:5860917

Honaker, D E

Disclosed is a process for removing acidic impurities from off-gases generated in the retorting of oil shale comprising contacting a rubblized mass of oil shale which has been substantially depleted in hydrocarbonaceous materials with water, so as to extract basic components from the mass; and contacting off-gases, which were generated during the retorting of oil shale and which contain acidic impurities, with the water containing basic components so as to substantially remove said acidic impurities from the off-gases. Also disclosed is a process for the in situ retorting of oil shale and removal of acidic impurities from off-gases generated in the in situ or surface retorting of oil shale comprising forming a plurality of subterranean in situ oil shale retorts containing rubblized oil shale having a void space of about 5 to about 40 per cent; retorting a first subterranean in situ retort until the rubblized oil shale is spent and substantially depleted in hydrocarbonaceous material; injecting water into the spent retort so as to deplete the heat content of the retorted rubblized oil shale and to form steam; recovering and using the steam in the retorting of a second subterranean in situ oil shale retort; continuing to inject water into the spent first retort so as to extract basic components from the retorted rubblized oil shale; recovering the water containing basic components; and contacting off-gases generated during the in situ or surface retorting of oil shale, the off-gases containing acidic impurities, with the water containing basic components so as to substantially remove acidic impurities from the off-gases.

• Assignee: Standard Oil Co. (Indiana)
• Patent Number(s): US 4117886
• OSTI ID: 5860917
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040401* -- Oil Shales & Tar Sands-- In Situ Methods
True & Modified
040900 -- Oil Shales & Tar Sands-- Waste management
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
ENERGY SOURCES
FOSSIL FUELS
FRAGMENTATION
FUELS
GASEOUS WASTES
HYDROGEN COMPOUNDS
IN-SITU PROCESSING
IN-SITU RETORTING
INORGANIC ACIDS
OIL SHALES
ORGANIC ACIDS
ORGANIC COMPOUNDS
PROCESSING
PURIFICATION
REMOVAL
RETORTING
WASTES