Chemische Fabrik Budenheim Kg

Gunnar Buehler

Christian Graf

Michael Rapphahn

Kilian Schwarz

Andreas Jazdanian

Ruediger Wissemborski

Joachim Markmann

Thomas Futterer

Hans-Dieter Naegerl

Gerhard Scheuer

Killian Schwarz

David Kuemmet

A process for producing a phosphate by: introducing oxidic metal(II)-, metal(III)- metal(IV) or compounds with mixed oxide stages selected from hydroxides, oxides, oxide-hydroxides, oxide-hydrates, carbonates and hydroxide carbonates, of at least one of the metals Mn, Fe, Co and Ni with the elemental forms or alloys of at least one of the metals Mn, Fe, Co and/or Ni into an aqueous medium containing phosphoric acid, and reacting the oxidic metal compounds with elemental forms or alloys of the metals to obtain divalent metal ions, removing solid substances, producing an alkali metal phosphate receiver solution with a pH-value of 5 to 8 and metering the aqueous solution into the receiver solution and at the same time metering a basic aqueous alkali hydroxide solution that the pH-value of the resulting reaction mixture is kept in the region of 5 to 8 to precipitate the desired phosphate.

Metal phosphates and process for the preparation thereof

A method for producing an iron(III)orthophosphate-carbon composite which contains iron(III)orthophosphate of the general formula FePO&#xd7;nHO (n&#x2266;2.5), a carbon source being dispersed in a phosphoric aqueous Feion-containing solution and orthophosphate-carbon composite being precipitated and removed from the aqueous solution when an oxidant is added to the dispersion.

Iron (III) orthophosphate-carbon composite

A manganese(Mn)-bearing monometal phosphate of the type Mn(PO).3HO or mixed-metal phosphate of the type (Mn, Met)(PO).3HO, wherein x+y=1 and Met represents one or more metals selected from Fe, Co, Ni, Sc, Ti, V, Cr, Cu, Zn, Be, Mg, Ca, Sr, Ba, Al, Zr, Hf, Re, Ru, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, characterized in that in the X-ray powder diffraction diagram the phosphate has peaks at 10.96&#xb1;0.05, 12.78&#xb1;0.17, 14.96&#xb1;0.13, 17.34&#xb1;0.15, 18.98&#xb1;0.18, 21.75&#xb1;0.21, 22.07&#xb1;0.11, 22.97&#xb1;0.10, 25.93&#xb1;0.25, 26.95&#xb1;0.30, 27.56&#xb1;0.10, 29.19&#xb1;0.12, 29.84&#xb1;0.21, 30.27&#xb1;0.12, 34.86&#xb1;0.21, 35.00&#xb1;0.20, 35.33&#xb1;0.30, 35.58&#xb1;0.10, 35.73&#xb1;0.12, 42.79&#xb1;0.45, 43.37&#xb1;0.45, 44.70&#xb1;0.15 and 44.93&#xb1;0.20 degrees two-theta, based on CuK-radiation.

Metal phosphate containing manganese and method for its production

Iron(III) orthophosphate of the general formula FePO&#xd7;nHO (n&#x2266;2.5), prepared by a process in which iron(II)-, iron(III)- or mixed iron(II, III) compounds selected from among hydroxides, oxides, oxidehydroxides, oxide hydrates, carbonates and hydroxidecarbonates are reacted with phosphoric acid having a concentration in the range from 5% to 50%, any iron(II) present after the reaction is converted into iron(III) by addition of an oxidant and solid iron(III) orthophosphate is separated off from the reaction mixture.

Iron(III) orthophosphate for Li ion accumulators

A process for the production of iron (III) orthophosphate of the general formula FePO&#xd7;nHO (n&#x2266;2.5) comprising: a) producing an aqueous solution containing Feions by introducing, iron (II), iron (III) or mixed iron (II, III) compounds selected from hydroxides, oxides, oxide hydroxides, oxide hydrates, carbonates and hydroxide carbonates, together with elementary iron, into a phosphoric acid-bearing aqueous medium, to dissolve Feions and to react Fewith elementary Fe in a comproportionation reaction to give Fe; b) separating solids from the phosphoric-acid aqueous Fesolution, and c) adding an oxidation agent to the phosphoric-acid aqueous Fesolution to oxidize iron (II) in the solution to precipitate iron (III) orthophosphate of the general formula FePO&#xd7;nHO. The invention includes the product of the process and its use to make LiFePOfor batteries.

Production of iron orthophosphate

A laser-writable molding material containing A) at least one polymer material or at least one precursor compound which can be polymerised to give a polymer material, and B) a particulate salt-like compound or a mixture of particulate salt-like compounds, which under the influence of laser light changes its color or leads to a color change in the component A). In order to enlarge the range of matrix materials hitherto available for laser writing and to overcome the disadvantages of the previously used writing procedures for such matrix materials, the laser-writable molding material according to the invention is characterised in that the at least one polymer material of the component A) is selected from polymer compounds having siloxane crosslinking units.

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Nickenich, Germany

Gunnar Buehler