Process for cleaning of coal and separation of mineral matter and pyrite therefrom, and composition useful in the process

Patent · Tue Jun 11 04:00:00 EDT 1991

OSTI ID:5795903

Myers, C Y; Read, R B

This patent describes a process for cleaning of particulate coal and separation therefrom of pyrite and ash. It comprises slurrying a particulate coal feed material in an aqueous liquid flotation composition to produce a pulp, the feed material comprising particles of carbonaceous matter, particles comprising pyrite and particles comprising ash, and the aqueous liquid flotation composition containing an anionic surfactant comprising a substituted ethenesulfonic acid or salt thereof; aerating the pulp to produce bubbles therein, whereby the particles of carbonaceous material contained in the pulp adhere preferentially to the surfaces of the bubbles and are carried by the bubbles to the upper surface of the liquid where a foam of the bubbles is formed, the solids contained within the foam being enriched in the carbonaceous matter, the solids in a zone of the liquid phase below the foam being relatively enriched in pyrite and ash; separating the foam from the liquid phase comprising the zone; and recovering the carbonaceous matter from the foam.

• Assignee: Southern Illinois Univ. Foundation, Carbondale, IL (United States)
• Patent Number(s): US 5022983; A
• Application Number: PPN: US 7-395014
• OSTI ID: 5795903
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
ASHES
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL FEEDSTOCKS
CLEANING
COAL
COAL PREPARATION PLANTS
COMBUSTION PRODUCTS
DISPERSIONS
ENERGY SOURCES
FLOTATION
FOSSIL FUELS
FUEL SLURRIES
FUELS
INDUSTRIAL PLANTS
MATERIALS
MINERALS
MIXTURES
PARTICLES
PARTICULATES
PYRITE
RESIDUES
SEPARATION PROCESSES
SLURRIES
SULFIDE MINERALS
SUSPENSIONS