Chemical-mechanical dewatering process

Publication Date
1997-09-23Filing Date
1995-10-06Inventor
Yoon, Roe-Hoan
Basilio, Cesar I.
Metadata
Show full item recordAbstract
Small, wet particulate material is effectively dried by adding a hydrophobizing agent to coat the surfaces of the particulates, and then mechanically removing water droplets from the surfaces of the particulates. Once on the surface of the particulates, the hydrophobizing reagent makes the particulates relatively more hydrophobic and increases the water contact angle on the particulates. The moisture content of the particulate material can easily be reduced to levels below 20%, below 10%, and even below 5%. The process can be used to dewater a wide variety of constituents including coal particles, clays, sulfides, phosphorous compounds, minerals, metals, waste sludge, etc. Particularly preferred hydrophobizing reagents include mono unsaturated fatty esters and polysiloxane polymers.
Assignee
Virginia Tech Intellectual Properties, Inc.
Patent Number
5670056
Application Number
8540178
Primary/U.S. Class
209/5
Other/U.S. Class
210/728
210/729
210/732
210/770
210/771
210/778
44/626
CPC Class
B01D37/03
F26B5/005
Patent Type
utility
Collections
- Virginia Tech Patents [688]