Batch process for making high flash point pitch
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Jun 12, 2003
app pub date -
Dec 10, 2001
filing date -
Dec 10, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A method for producing a high-flash-point impregnating pitch that comprises charging coal tar into a batch still; heating the coal tar to an intermediate liquid state of soft pitch; maintaining the intermediate temperature of the soft pitch at a steady level; and introducing sparging gas while maintaining the temperature of the coal tar at a substantially steady level. The method of the present invention provides a pitch that has a softening point of about 90.degree. C. and a flash point of above about 270.degree. C.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully