Abstract 1. A PROCESS FOR PRODUCING MAGNETIC FLUIDS FROM AQUEOUS INDUSTRIAL WASTE STREAMS CONTAINING FERROUS IRON SALTS WHICH COMSPRISES: OXIDIZING A PORTION OF THE FERROUS IRON CONTAINED IN THE WASTE STREAM TO THE FERRIC STATE; REACTING THE WASTE STREAM, NOW CONTAINING FERROUS AND FERRIC IRON SALTS, WITH AN EXCESS OF AMMONIUM HYDROXIDE TO PRECIPITATE A SLURRY OF COLLOIDAL SIZE FERROSO-FERRIC IRON OXIDE PARTICLES; ADDING A LONG CHAIN FATTY ACID HAVING ABOUT 18 CARBON ATOMS TO THE IRON OXIDE PARTICLE SLURRY WHEREBY THE FATTY ACID REACTS WITH AMMONIUM HYDROXIDE TO FORM AN AMMONIUM SALT OF THE FATTY ACID AND TO THEREAFTER COAT IRON OXIDE PARTICLES CONTAINED IN TH SLURRY WITH AN ADSORBED LAYER OF AMMONIATED FATTY ACID TO HEATING THE SLURRY TO A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE OF THE AMMONIATED FATTY ACID TO CONVERT THE ADSORBED LAYER OF AMMONIATED FATTY ACID TO THE ACID FORM AND TO EXPEL AMMONIA FROM THE SLURRY, AND RECOVERING FROM THE SLURRY A PRODUCT FRACTION COMPRISING FERRIMAGNETIC IRON OXIDE PARTICLES OF COLLOIDAL SIZE COATED WITH AN ADBSORBED LAYER OF FATTY ACID.
Inventors
👤 G Reimers
👤 S Khalafalla
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-23 08:07
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/44; H01F1/445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A PROCESS FOR PRODUCING MAGNETIC FLUIDS FROM AQUEOUS INDUSTRIAL WASTE STREAMS CONTAINING FERROUS IRON SALTS WHICH COMSPRISES: OXIDIZING A PORTION OF THE FERROUS IRON CONTAINED IN THE WASTE STREAM TO THE FERRIC STATE; REACTING THE WASTE STREAM, NOW CONTAINING FERROUS AND FERRIC IRON SALTS, WITH AN EXCESS OF AMMONIUM HYDROXIDE TO PRECIPITATE A SLURRY OF COLLOIDAL SIZE FERROSO-FERRIC IRON OXIDE PARTICLES; ADDING A LONG CHAIN FATTY ACID HAVING ABOUT 18 CARBON ATOMS TO THE IRON OXIDE PARTICLE SLURRY WHEREBY THE FATTY ACID REACTS WITH AMMONIUM HYDROXIDE TO FORM AN AMMONIUM SALT OF THE FATTY ACID AND TO THEREAFTER COAT IRON OXIDE PARTICLES CONTAINED IN TH SLURRY WITH AN ADSORBED LAYER OF AMMONIATED FATTY ACID TO HEATING THE SLURRY TO A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE OF THE AMMONIATED FATTY ACID TO CONVERT THE ADSORBED LAYER OF AMMONIATED FATTY ACID TO THE ACID FORM AND TO EXPEL AMMONIA FROM THE SLURRY, AND RECOVERING FROM THE SLURRY A PRODUCT FRACTION COMPRISING FERRIMAGNETIC IRON OXIDE PARTICLES OF COLLOIDAL SIZE COATED WITH AN ADBSORBED LAYER OF FATTY ACID.
Claim 2
Dependent Claim
174 words
A PROCESS FOR PRODUCING MAGNETIC FLUIDS FROM AQUEOUS INDUSTRIAL WASTE STREAMS CONTAINING FERROUS IRON SALTS WHICH COMSPRISES: OXIDIZING A PORTION OF THE FERROUS IRON CONTAINED IN THE WASTE STREAM TO THE FERRIC STATE; REACTING THE WASTE STREAM, NOW CONTAINING FERROUS AND FERRIC IRON SALTS, WITH AN EXCESS OF AMMONIUM HYDROXIDE TO PRECIPITATE A SLURRY OF COLLOIDAL SIZE FERROSO-FERRIC IRON OXIDE PARTICLES; ADDING A LONG CHAIN FATTY ACID HAVING ABOUT 18 CARBON ATOMS TO THE IRON OXIDE PARTICLE SLURRY WHEREBY THE FATTY ACID REACTS WITH AMMONIUM HYDROXIDE TO FORM AN AMMONIUM SALT OF THE FATTY ACID AND TO THEREAFTER COAT IRON OXIDE PARTICLES CONTAINED IN TH SLURRY WITH AN ADSORBED LAYER OF AMMONIATED FATTY ACID TO HEATING THE SLURRY TO A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE OF THE AMMONIATED FATTY ACID TO CONVERT THE ADSORBED LAYER OF AMMONIATED FATTY ACID TO THE ACID FORM AND TO EXPEL AMMONIA FROM THE SLURRY, AND RECOVERING FROM THE SLURRY A PRODUCT FRACTION COMPRISING FERRIMAGNETIC IRON OXIDE PARTICLES OF COLLOIDAL SIZE COATED WITH AN ADBSORBED LAYER OF FATTY ACID.