Sulfur-containing animal-feed additives
View Patent ↗The invention relates to sulfur-containing animal-feed additives produced from fermentation liquors, and to processes for their production.
1. An animal-feed additive based on a fermentation liquor, comprising:
a) one or more cysteine compounds selected from the group consisting of L-cysteine, L-cystine, thiazolidines, and salts thereof, and
b) from 2% to 100% of other non-cellular ingredients of the fermentation liquor.
2. An animal-feed additive based on a fermentation liquor, comprising:
a) a thiazolidine or a combination of a thiazolidine together with at least one of L-cysteine, L-cystine, and salts thereof, and
b) from 2% to 100% of other non-cellular ingredients of the fermentation liquor.
3. The animal-feed additive according to claim 1 or 2 , wherein the thiazolidine is one or more compounds selected from the group consisting of 2-methyl-thiazolidine-2,4-dicarboxylic acid, 2-carboxymethyl-thiazolidine- 2,4-dicarboxylic acid, 2-carboxyethyl-thiazolidine-2,4-dicarboxylic acid, and thiazolidine-2,4- dicarboxylic acid.
4. The animal-feed additive according to claim 1 or 2 , wherein the salt of the cysteine compound is one or more salts selected from the group consisting of the sodium, potassium, ammonium, magnesium and calcium salt.
5. The animal-feed additive according to claim 1 , wherein the fermentation liquor contains a biomass in an amount ranging from >2% to ≦50% in the animal-feed additive.
6. The animal-feed additive according to claim 1 , wherein the fermentation liquor contains a biomass in an amount ranging from >50% to 100% in the animal-feed additive.
7. The animal-feed additive according to claim 1 , wherein said cysteine compound or salt thereof is present in the feed in an amount ranging from 1 to 98 wt.%.
8. The animal-feed additive according to claim 1 or 2 , which further comprises one or more chemical compounds selected from the group consisting of glutathione, cystathionine, biotin, thiamin, liponic acid, coenzyme A and L- methionine.
9. The animal-feed additive according to claim 1 , which is in liquid form.
10. The animal-feed additive according to claim 1 which is in solid form.