Degussa Aktiengesellschaft

Deutsche Gold- Und Silber-scheideanstalt Vormals Roessler

Evonik Degussa Gmbh

Franz-Ludwig Dahm

Heinz Friedrich

Helmut Beschke

Gunter Prescher

Gerd Schreyer

Kurt Eiermann

Dieter Greissinger

Hermann Lotter

Wolfgang Nischk

Wolfram Binder

Wolfgang Polzer

Ulrich Hertz

Wolfgang Hohn

Herbert Diehl

Reinhold Lamberty

An animal feed additive comprising stable pellets is produced by pelletizing from a fermentation broth containing an animal feed additive with at least 33% by weight of the fermentation products present. The pellets can be produced particularly effectively by pelletizing providing they are built up from at least 30% by weight of fine particles of which at least 70% by weight are smaller than 100 .mu.m in size. The biomass may be completely present, partly present or not present at all in the pellets.

Animal feed additive based on fermentation broth, a process for its

Crude nicotinamide is purified by a recrystallization and thereby is particularly freed from nicotinic acid and salts of nicotinic acid. As solvent there is used 2-methylpropanol-1 containing water. The warm solution after dissolving the crude nicotinamide is treated with ion exchangers.

Process for the purification of nicotinic acid amide

Crude nicotinamide is purified by a recrystallization and in this way freed especially from nicotinic acid and salts of nicotinic acid. As solvent there is used a 2-methylpropanol-1 containing water. The recrystallization takes place at a pH between about 7 and 10.

Process for the purification of nicotinic acid amide I

There is provided an apparatus for continuous measurement of ion concentration in solutions by means of ion sensitive electrodes, which apparatus consists of an electrode containing measuring cell and a dosaging device. This apparatus is particularly suited for measuring cyanide ion concentration in strong hydrochloride solution in the presence of cyanogen chloride. The dosaging device contains a degassing section and a reflecting plate to which the supply means for the working solution to be measured and for the necessary auxiliary reagents are directed, the supply means being in the form of screens or nozzles.

Apparatus for continuously measuring ion concentrations

Pyridine and 3-methylpyridine prepared by the catalytic reaction of acrolein or a mixture of acetaldehyde and acrolein with ammonia is recovered from the gas mixture formed by cooling the gas mixture and working up the condensate separated in the cooling. The gaseous mixture is first cooled to a temperature between 40.degree. and about 80.degree. C. and then cooled to a temperature between about 10.degree. and below 40.degree. C.

Process for the recovery of pyridine and 3-methylpyridine

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Alzenau, Germany

Franz-Ludwig Dahm