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Process for the recovery of perfluorinated sulphonic acids from spent acid

Patent
US-6340414-B1
Inventor
HOMMELTOFT SVEN IVAR (DK)
Assignee
HALDOR TOPSOE AS (DK)
Country
United States
Dates
  • Priority:
    1998/07/31
  • Grant:
    2002/01/22
Description
This web page summarizes information in PubChem about patent US-6340414-B1. This includes chemicals mentioned, as reported by PubChem contributors, as well as other content, such as title, abstract, and International Patent Classification (IPC) codes. To read more about how this page was constructed, please visit the PubChem patents help page.

1 Abstract

Process for the recovery of fluorinated sulphonic acid including the step of subjecting the spent acid to heat treatment with stepwise or continuously increasing temperature, withdrawing at least two fractions during the heat treatment; and recovering the fluorinated sulphonic acid from each fraction.

2 Full Text

3 Important Dates

3.1 Priority Date

1998/07/31

3.2 Filing Date

1999/07/07

3.3 Publication Date

2002/01/22

3.4 Grant Date

2002/01/22

4 Inventor

HOMMELTOFT SVEN IVAR (DK)

5 Assignee

HALDOR TOPSOE AS (DK)

6 Country

United States

7 Linked Chemicals

7.1 PubChem Compounds

7.2 PubChem Substances

8 Patent Family

9 Classification

9.1 IPC

C07B63/00 (inventive)

B01J31/40 (inventive)

C07C303/44 (inventive, first)

C07C309/06 (inventive)

9.2 CPC

Y10S159/19

Y10S159/16

B01J31/0227 (inventive)

B01J31/4092 (inventive, first)

B01J2231/4205

10 Citations

11 Cited By

12 Similar Patents

13 Information Sources

  1. Google Patents
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  2. PubChem
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