Filtering material and process of preparing the same
Patent
·
OSTI ID:7280386
A process of preparing a filtering compound from a porous spent shale of a silicious nature is described. The shale is heated with a strong caustic soda solution whereby the caustic soda enters the pores of the shale and forms sodium silicate with the silica in the pores. Sulfuric acid is added to set free silicic acid in the pores, and the shale is washed with water until free from sodium sulfate, then heated to a low red heat until dry.
- Assignee:
- TIC; EDB-78-013738
- Patent Number(s):
- US 1555639
- OSTI ID:
- 7280386
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
04 OIL SHALES AND TAR SANDS
040600* -- Oil Shales & Tar Sands-- Products & By-Products
ALKALI METAL COMPOUNDS
BITUMINOUS MATERIALS
CALCINATION
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
FILTERS
FILTRATION
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ACIDS
METAMORPHIC ROCKS
MINERALS
OIL SHALES
OXIDES
OXYGEN COMPOUNDS
PROCESSING
PYROLYSIS
ROCKS
SEPARATION PROCESSES
SHALES
SILICA
SILICATES
SILICIC ACID
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SODIUM SILICATES
SODIUM SULFATES
SPENT SHALES
SULFATES
SULFUR COMPOUNDS
SULFURIC ACID
SYNTHESIS
040600* -- Oil Shales & Tar Sands-- Products & By-Products
ALKALI METAL COMPOUNDS
BITUMINOUS MATERIALS
CALCINATION
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
FILTERS
FILTRATION
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ACIDS
METAMORPHIC ROCKS
MINERALS
OIL SHALES
OXIDES
OXYGEN COMPOUNDS
PROCESSING
PYROLYSIS
ROCKS
SEPARATION PROCESSES
SHALES
SILICA
SILICATES
SILICIC ACID
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SODIUM SILICATES
SODIUM SULFATES
SPENT SHALES
SULFATES
SULFUR COMPOUNDS
SULFURIC ACID
SYNTHESIS