Claims
- 1. A method of breaking an oil-in-water emulsion comprising adding thereto an effective amount for the purpose of an aqueous solution of effective oligomeric phosphonate having the structural formula: ##STR10## where R.sub.1 and R.sub.2 each represent a group having the formula CxH.sub.2x+1 ; x is from 6 up to and including 13; Y is ##STR11## M is a water soluble cation; and n is 1 or greater so long as the oligomeric phosphonate is water soluble.
- 2. A method according to claim 1, wherein n is from about 1 to about 16.
- 3. A method according to claim 2, wherein M is selected from the group consisting of hydrogen, sodium, potassium, and ammonium.
- 4. A method according to claim 3, wherein x is 7 up to and including 11.
- 5. A method according to claim 2, wherein the phosphonate is added in an amount of from about 5 to about 150 parts per million parts of oil-in-water emulsion.
- 6. A method according to claim 2, wherein the oil-in-water emulsion is part of a secondary oil recovery system.
- 7. A method according to claim 2, wherein the oil-in-water emulsion is industrial oil-containing wastewater.
Priority Claims (1)
Number |
Date |
Country |
Kind |
324395 |
Mar 1979 |
CAX |
|
Parent Case Info
This is a division of application Ser. No. 941,537 filed Sept. 11, 1978, now U.S. Pat. No. 4,190,615, issued Feb. 26, 1980; and the parent application is incorporated herein by reference.
US Referenced Citations (6)
Divisions (1)
|
Number |
Date |
Country |
Parent |
941537 |
Sep 1978 |
|