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Inventor: H oppner; Bernd
Address: Neustadt, DE
No. of patents: 3
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5569409 |
Finely divided acicular magnetic modified chromium dioxide |
October 29, 1996 |
| A finely divided acicular CrO.sub.2 modified with iron, tellurium and/or antimony and having a high coercive force possesses improved heat stability of the residual induction and a relatively narrow distribution of the particle size and of the coercive force. This CrO.sub.2 pigment is |
| 5484628 |
Preparation of acicular cobalt-containing magnetic iron oxide |
January 16, 1996 |
| Acicular cobalt-containing magnetic iron oxides having a high coercive force and a core/shell structure and hence low temperature dependence of the coercive force are prepared by a process in which, in a first stage, surface activation is effected by means of iron(II) and cobalt ions und |
| 4517391 |
Continuous preparation of ethanol |
May 14, 1985 |
| Ethanol is prepared by hydrogenating acetic acid under superatmospheric pressure and at elevated temperatures by a process wherein a predominantly cobalt-containing catalyst is used and acetic acid and hydrogen are passed through the reactor, at from 210.degree. to 330.degree. C. and und |
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