Carbon Coated Magnetic Nanoparticles and Their Use in Separation Processes
AssigneeETH Zurich
InventorsRobert N. Grass, Wendelin Jan Stark
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for separating a dispersed phase from a continuous phase comprising the steps of i) contacting said phases with an effective amount of nanoparticles; ii) applying a magnetic field gradient to the obtained system; iii) separating the obtained phases wherein said nanoparticles are of the core shell type, said core consists of a metal or alloy having soft magnetic properties and said shell contains a graphene layers which are optionally functionalized; to new nanoparticles and method of manufacturing such nanoparticles.
Claims25
A method for separating a dispersed phase or a dissolved material from a continuous phase comprising the steps of
- i) contacting said phases with an effective amount of nanoparticles;
- ii) applying a magnetic field gradient to the obtained system;
- iii) separating the obtained phases
- wherein said nanoparticles are of the core shell type, said core consists of a metal or alloy having soft magnetic properties and said shell contains one or more graphene-layers which are optionally functionalized.
A method for separating a dispersed phase from a continuous phase comprising the use of nanoparticles of the core shell type, wherein said core consists of a metal or alloy having soft magnetic properties and said shell essentially consists of one or more graphene layers which are non-functionalized or functionalized.
A method for separating a dissolved material from a continuous phase comprising the use of nanoparticles of the core shell type, wherein said core consists of a metal or alloy having soft magnetic properties and said shell essentially consists of one or more graphene layers which are functionalized.
Nanoparticle of the core shell type, wherein said core consists of a metal or alloy having soft magnetic properties and said shell contains one or more graphene layers which are functionalized by one or more of the groups according to formula (I):
- wherein
- n is an integer between 1 and 5;
- m is an integer between 0 and 20;
- Z represents a spacer selected from the group of alkyl, alkenyl, alkyloxy, peptides, amino acids saccarides;
- FG represents independent from each other OH, OR, NO2, NH2, NHR, NR2, COH, COR, COOH, COOR, SO2, SOR, SO2R, halogen, P(O)OH, P(O)OR, P(O)2OH, P(O)2OR
- R represents C1-C4alkyl, C1-C4alkoxy, C3-C10cyclo-alkyl, C4-C10 aryl,
- or a 5-membered heterocycle containing at least one atom selected from the group of N,O,S
- or a 6-membered heterocycle containing at least one atom selected from the group of N,O,S
- or a metal chelating group selected from the group consisting of polycarboxylic acids, polyamides, polyamides, amino acids, polyaminocarboxylates, polyamines, polysulfides;
- and its salts.
Dependencies are inferred from the claim text.