US3898159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing anionic surface active component from drainage
Assignee: Lion Fat and Oil Co Ltd
•
Filing: 1974-09-04
•
Granted: 1975-08-05
•
Expires: 1994-09-04
Abstract
Abstract Anionic surface active components are separated from drainage or sewage streams by foam separation following reaction with a polyvalent metal ion. The polyvalent metal salt of surface active agent can be adsorbed onto the surface of the foam, in high concentration.
Inventors
- 👤 Akio Okabe
- 👤 Tokio Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:37
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; C02F1/24; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/91
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
A METHOD FOR REMOVING AN ANIONIC SURFACE ACTIVE COMPONENT FROM A WASTE STREAM, WHICH COMPRISES: ADMIXING A POLYVALENT METAL ION SELECTED FROM THE GROUP CONSISTING OF CA++, MG++, BA++, ZNQQ, FE++, AL+++, AND FE+++ WITH A WASTE STREAM SUBSTANCIALLY FREE OF PHOSPHATE ION IN AMOUNTS OF 0.5- 10 MOLE EQUIVALENT OF SAID POLYVALENT METAL ION PER MOLE OF IONIC SURFACE ACTIVE COMPONENT IN SAID WASTE STREAM AND ADJUSTING THE PH OF SAID WASTE STREAM BETWEEN 4.0 TO 5.5 SO AS TO FORM WATER INSOLUBLE OR DIFFICULTY SOLUBLE POLYVALENT SALTS OF SAIS ANIONIC SURFACE ACTIVE COMPONENTS, INJECTING AIR INTO THE MIXTURE TO CAUSE FOAMING THEREOF, WHEREBY SAID SALTS ARE ABSORBED INTO THE FOAM AND THEREAFTER SEPARATING SAID FOAM.
Claim 2
Independent Claim
117 words
A METHOD FOR REMOVING AN ANIONIC SURFACE ACTIVE COMPONENT FROM A WASTE STREAM, WHICH COMPRISES: ADMIXING A POLYVALENT METAL ION SELECTED FROM THE GROUP CONSISTING OF CA++, MG++, BA++, ZNQQ, FE++, AL+++, AND FE+++ WITH A WASTE STREAM SUBSTANCIALLY FREE OF PHOSPHATE ION IN AMOUNTS OF 0.5- 10 MOLE EQUIVALENT OF SAID POLYVALENT METAL ION PER MOLE OF IONIC SURFACE ACTIVE COMPONENT IN SAID WASTE STREAM AND ADJUSTING THE PH OF SAID WASTE STREAM BETWEEN 4.0 TO 5.5 SO AS TO FORM WATER INSOLUBLE OR DIFFICULTY SOLUBLE POLYVALENT SALTS OF SAIS ANIONIC SURFACE ACTIVE COMPONENTS, INJECTING AIR INTO THE MIXTURE TO CAUSE FOAMING THEREOF, WHEREBY SAID SALTS ARE ABSORBED INTO THE FOAM AND THEREAFTER SEPARATING SAID FOAM.
Claim 3
Dependent Claim
25 words
The method of claim 1, wherein said anionic surface active component is contained in said waste stream at a concentration of 5 - 5,000 ppm.
Claim 4
Dependent Claim
22 words
The method of claim 1, wherein said polyvalent metal ion is provided by a water soluble compound of said polyvalent metal ion.
Claim 5
Dependent Claim
26 words
The method of claim 1, wherein said foam is broken by centrifugal separation to yield a low water content cake containing said surface active component salts.
Claim 6
Dependent Claim
50 words
The method of claim 1, wherein said anionic surface active components are selected from the group consisting of the alkali or ammonium salts of alkylbenzene sulfonate, alkane sulfonate, alkene sulfonate, fatty alcohol sulfate, fatty acids, ethylene oxide adducts of fatty alcohol sulfate and ethylene oxide adducts of alkyl phenol sulfate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |