Patent US937519A successfully refreshed from Google Patents.
Patent EP0091086B1 successfully refreshed from Google Patents.
EP0091086B1
Expired / Lapsed
EP
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Process for decreasing the friction resistance in flowing aqueous media
Assignee: Hoechst AG
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Filing: 1983-03-30
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Granted: 1988-08-03
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Expires: 2003-03-30
Abstract
No abstract record available.
Inventors
- 👤 Dieter Dr. Ohlendorf
- 👤 Werner Interthal
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 20:17
CPC Classifications
C; C09; C09K; C09K3/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
A process for reducing the drag of aqueous media in turbulent or pulsating flow, which comprises adding to the aqueous medium from 0.01 to 2% by weight of a compound of the formula in which K denotes a group of the formula R 2 denotes C l -C 3 -alkyl, preferably methyl, A denotes an anion of the following formulae R 3 denotes C 7 ―C 10 -alkyl or C 7 ―C 10 -Alkenyl and R 1 , if A = R 3 COO-, denotes C16-alkyl or C 16 -alkenyl, if A = thiocyanate, denotes C 16 ―C 26 -alkyl or Ci 6 -C 26 - alkenyl and, if A = p-toluenesulfonate, denotes C 12 ―C 26 -alkyl or C 1z -C 26 -alkenyl, except cetyltrimethylammonium-p-toluenesulfonate.
Claim 2
Dependent Claim
126 words
A process for reducing the drag of aqueous media in turbulent or pulsating flow, which comprises adding to the aqueous medium from 0.01 to 2% by weight of a compound of the formula in which K denotes a group of the formula R 2 denotes C l -C 3 -alkyl, preferably methyl, A denotes an anion of the following formulae R 3 denotes C 7 ―C 10 -alkyl or C 7 ―C 10 -Alkenyl and R 1 , if A = R 3 COO-, denotes C16-alkyl or C 16 -alkenyl, if A = thiocyanate, denotes C 16 ―C 26 -alkyl or Ci 6 -C 26 - alkenyl and, if A = p-toluenesulfonate, denotes C 12 ―C 26 -alkyl or C 1z -C 26 -alkenyl, except cetyltrimethylammonium-p-toluenesulfonate.
Claim 3
Dependent Claim
31 words
The process as claimed in claim 1, wherein, in addition, the solution is adjusted to a pH value of up to 4.5 or above 9 by adding acids or bases respectively.
Claim 4
Dependent Claim
22 words
The process as claimed in claim 1, wherein alkali metal, alkaline earth metal, transition metal, ammonium or aluminium salts are also added.
References Cited (Backward Citations)
No citation records indexed.
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