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Kurt Wilhelm Eichenhofer, Reinhard Schliebs: Purification of waste water from hydrazine production. Bayer Aktiengesellschaft, Burgess Dinklage & Sprung, November 1, 1977: US04056469 (12 worldwide citation)

A process for the purification of waste water produced in hydrazine production by the oxidation of ammonia or an amine with an oxidizing agent in the presence of an aldehyde or ketone, comprising intensively mixing the waste water with chlorine or a hypochlorite at a temperature of about 10.degree. ...


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Karl Brandle, Kurt Wilhelm Eichenhofer, Klaus Geisler, Gunter Putz, Klaus P Grabowski: Process for the production of oleum and sulfuric acid. Bayer Aktiengesellschaft, Sprung Horn Kramer & Woods, February 14, 1995: US05389354 (4 worldwide citation)

In the continuous production of oleum having a concentration of 10 to 45% by weight SO.sub.3 and/or sulfuric acid having a concentration of 94 to 100% by weight H.sub.2 SO.sub.4 by burning sulfur with atomospheric oxygen on the principle of overstoichiometric or understoichiometric burning, cooling ...


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Kurt Wilhelm Eichenhofer, Klaus Peter Grabowski, Günter Dräger, Martin Kürten, Martin Schweitzer: Process for the combustion of sulphur for the preparation of oleum and sulphuric acid with reduced (NO)x content. Bayer Aktiengesellschaft, Diderico van Eyl, Godfried R Akorli, May 17, 2005: US06893622 (1 worldwide citation)

The invention relates to a process for the continuous preparation of oleum of a concentration of 10 to 45% by weight of SO3 and/or sulphuric acid of a concentration of 94 to 100% by weight of H2SO4 by combustion of sulphur with atmospheric oxygen according to the principle of superstoichiometric com ...


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Kurt Wilhelm Eichenhofer, Reinhard Schliebs, Hermann Brandl, Heinrich Kohnen: Working up synthesis solutions obtained in production of hydrazine. Bayer Aktiengesellschaft, Burgess Dinklage & Sprung, January 25, 1977: US04005179 (1 worldwide citation)

In the production of hydrazine wherein aqueous ammonia is oxidized in the presence of a ketone to form an aqueous solution containing at least one of a hydrazone and a ketazine along with ammonia, the hydrazone and ketazine are concentrated and the hydrazone and ketazine are subsequently hydrolyzed ...


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Kurt Wilhelm Eichenhofer, Reinhard Schliebs: Production of ketazines. Bayer Aktiengesellschaft, Burgess Dinklage & Sprung, June 22, 1976: US03965097

A process for the production of a ketazine of the general formula ##EQU1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently is an alkyl, cycloalkyl or aralkyl radical with up to 12 carbon atoms; or an optionally substituted aryl radical with up to 10 carbon atoms, at most two of the ...


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Kurt Wilhelm Eichenhofer, Klaus Peter Grabowski, Gunter Drager, Martin Kurten, Martin Schweitzer: Process for the combustion of sulphur for the preparation of oleum and sulphuric acid with reduced (NO)x content. Bayer Corporation, April 24, 2003: US20030077217-A1

The invention relates to a process for the continuous preparation of oleum of a concentration of 10 to 45% by weight of SO3 and/or sulphuric acid of a concentration of 94 to 100% by weight of H2SO4 by combustion of sulphur with atmospheric oxygen according to the principle of superstoichiometric com ...



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