Leonardite char adsorbents

Patent · Fri Jan 01 00:00:00 EST 1993

OSTI ID:868970

Knudson, Curtis L ^[1]

---

1. Grand Forks, ND

A process of preparing lignite (low rank) coal filter material, suitable for use in lieu of more expensive activated carbon filter materials, is disclosed. The process comprises size reducing Leonardite coal material to a suitable filtering effective size, and thereafter heating the size reduced Leonardite preferably to at least 750.degree. C. in the presence of a flow of an inert gas.

• Research Organization: Univ. of North Dakota, Grand Forks, ND (United States)
• DOE Contract Number: FC21-86MC10637
• Assignee: University of North Dakota Energy and Environment Research Center (Grand Forks, ND)
• Patent Number(s): US 5254521
• OSTI ID: 868970
• Country of Publication: United States
• Language: English

Related Subjects

leonardite
char
adsorbents
process
preparing
lignite
rank
coal
filter
material
suitable
lieu
expensive
activated
carbon
materials
disclosed
comprises
size
reducing
filtering
effective
thereafter
heating
reduced
preferably
750
degree
presence
flow
inert
gas
activated carbon
inert gas
process comprises
filter material
carbon filter
thereafter heating
coal material
coal filter
suitable filter
/502/95/423/