Patent US5217900A successfully refreshed from Google Patents.
US5217900A
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US
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Biological reactor
Assignee: BASF SE
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Filing: 1989-07-13
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Granted: 1993-06-08
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Expires: 2009-07-13
Abstract
Abstract A biological reactor which is operated using microorganisms and/or enzymes and used for the oxidative conversion of organic compounds, and in which the organic compounds to be converted are employed in the presence of a biocatalyst in the reactor space (4) (anode space) and the enzymes are regenerated at a polarized electrode (1), the polarization of the electrode (1) being effected by means of a catalyst electrode (2) which is separated from the reactor space (4) by a polyelectrolyte (3) and is located in an electrolyte space (5), wherein the electrode (1) is prepared from an electrically conductive carbon material which has been partially oxidized on the surface at a potential ε h of from +1.3 to +10 V in an aqueous oxygen-containing mineral acid.
Inventors
- 👤 Wolfgang Habermann
- 👤 Ernst-Heinrich Pommer
- 👤 Peter Hammes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:49
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/02; C12M23/06; C12M21/00; C12M21/18; C12M35/00; C12M35/02; H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8803; H01M4/8817; H01M4/90; H01M4/9008; H01M4/9016; H01M4/9075; H01M4/9083; H01M8/00; H01M8/16; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y10; Y10S; Y10S435/00; Y10S435/817
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
155 words
A biological reactor for the oxidative conversion of organic compounds comprising: means defining a reactor chamber and an electrolyte chamber, said means including an ion exchange membrane which separates the reactor chamber from the electrolyte chamber; an anodically polarized electrode made of an electrically conductive carbon material which has been subjected to a surface oxidation at a potential of ε h of from +1.3 to +10.0 V in an aqueous oxygen-containing mineral acid and then activated by cathodic reduction in aqueous mineral acid and to which at least one biocatalyst selected from the group consisting of enzymes and microorganisms is adsorptively immobilized, said anodically polarized electrode being present in the reactor chamber and separated from the electrolyte chamber by the ion exchange membrane; a polarizable catalyst electrode which is permeable to ions and electrically conductive, said catalyst electrode being present in the electrolyte chamber and separated from the reactor chamber by the ion exchange membrane.
Claim 2
Dependent Claim
155 words
A biological reactor for the oxidative conversion of organic compounds comprising: means defining a reactor chamber and an electrolyte chamber, said means including an ion exchange membrane which separates the reactor chamber from the electrolyte chamber; an anodically polarized electrode made of an electrically conductive carbon material which has been subjected to a surface oxidation at a potential of ε h of from +1.3 to +10.0 V in an aqueous oxygen-containing mineral acid and then activated by cathodic reduction in aqueous mineral acid and to which at least one biocatalyst selected from the group consisting of enzymes and microorganisms is adsorptively immobilized, said anodically polarized electrode being present in the reactor chamber and separated from the electrolyte chamber by the ion exchange membrane; a polarizable catalyst electrode which is permeable to ions and electrically conductive, said catalyst electrode being present in the electrolyte chamber and separated from the reactor chamber by the ion exchange membrane.
Claim 3
Dependent Claim
29 words
The reactor of claim 1 wherein the anodically polarized electrode is fixed to the ion exchange membrane and the polarizable catalyst electrode is fixed to the ion exchange membrane.
Claim 4
Dependent Claim
22 words
The reactor of claim 1 wherein the polarizable catalyst electrode is connected to the anodically polarized electrode via an external voltage source.
Claim 5
Dependent Claim
25 words
The reactor of claim 1 wherein the polarizable catalyst electrode and anodically polarized electrode are connected to an external voltage source and an auxiliary cathode.
Claim 6
Dependent Claim
15 words
The reactor of claim 1 wherein coenzymes are also immobilized on said anodically polarized electrode.
Claim 7
Dependent Claim
39 words
The reactor of claim 1 wherein the anodically polarized electrode consists of graphite, graphite wool or active carbon which has been subjected to partial electrochemical oxidation in aqueous nitric acid and then activated by cathodic reduction in mineral acid.
Claim 8
Dependent Claim
21 words
The reactor of claim 1 wherein the ion exchange membrane consists of heterogeneous or homogeneous cation exchange or anion exchange membranes.
Claim 9
Dependent Claim
34 words
The reactor of claim 1 wherein the polarizable catalyst electrode and anodically polarized electrode are in the form of felts, rods, expanded metals, sintered elements perforated plates, nets, expanded metal lattices, grids or sponges.
Claim 10
Dependent Claim
20 words
The reactor of claim 1 wherein the polarizable catalyst electrode and anodically polarized electrode contain holes, pores, channels or perforations.
Claim 11
Dependent Claim
22 words
The reactor of claim 9 wherein said holes, pores channels or perforations are partially or completely filled with said ion exchange membrane.
Claim 12
Dependent Claim
39 words
The reactor of claim 1 wherein the catalyst electrode consists of graphite which is partially oxidized on the surface and is doped with at least one of molybdenum and tungsten(VI) and alkali metal sulfides or molybdenum(VI) oxides and iodates.
Claim 13
Dependent Claim
32 words
The reactor of claim 1 wherein the catalyst electrode is doped on the surface with oxygen-carrying metal chelates and a binder which is ion-conducting and electron-conducting or contains ion-conducting and electron-conducting substances.
Claim 14
Dependent Claim
32 words
The reactor of claim 1 wherein the catalyst electrode consists of graphite which is partially oxidized on the surface and doped with vanadium IV, vanadium V, iron(III), titanium(III), titanium(IV) or combinations thereof.
References Cited (Backward Citations)
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| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
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