Title: Animal feeds containing antibiotic AV290

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Claims: I claim:

1. A process for the production of a dried fermentation harvest mash solids animal feed supplement containing an antibiotic AV290-alkyl sulfate complex which comprises the steps of:

a. acidifying a fermentation whole harvest mash containing antibiotic AV290 to a pH of from 1.9 to 2.1 with a pharmacologically acceptable acid;

b. adding to the acidified mash a complexing agent selected from the group consisting of compounds of the formula:

CH.sub.3 --(CH.sub.2).sub.n --O--SO.sub.2 --OM

wherein n is an integer from 9 to 17, inclusive, and M is sodium or potassium, and mixtures thereof until a sufficient amount of the antibiotic AV290-alkyl sulfate complex is imparted to said medium;

c. removing the harvest mash solids together with the precipitated antibiotic AV290-alkyl sulfate complex; and

d. drying the mixture of mash solids and antibiotic AV290-alkyl sulfate complex.

2. A process according to claim 1 wherein the complexing agent is sodium decyl sulfate.

3. A process according to claim 1 wherein the complexing agent is sodium lauryl sulfate.

4. A process according to claim 1 wherein the complexing agent is a mixture of sodium cetyl sulfate and sodium oleyl sulfate.

5. An animal feed supplement of a dry mixture of fermentation harvest mash solids and an effective amount for accelerating the growth rate of animals of antibiotic AV290-alkyl sulfate complex prepared in accordance with the process of claim 1.

6. An animal feed composition which comprises a nutritionally balanced animal feed and an effective amount for accelerating the growth rate of animals of a dry mixture of fermentation harvest mash solids and antibiotic AV290-alkyl sulfate complex prepared in accordance with the process of claim 1.

7. An animal feed composition which comprises a nutritionally balanced animal feed and an effective amount for accelerating the growth rate of animals of a dry antibiotic AV290-alkyl sulfate complex prepared from a fermentation whole harvest mash containing antibiotic AV290 by a process which comprises the steps of:

a. producing a fermentation liquor by filtering the whole harvest mash;

b. acidifying the fermentation liquor to a pH of from 1.9 to 2.1 with a pharmacologically acceptable acid;

c. adding to the acidified liquor a complexing agent selected from the group consisting of compounds of the formula:

CH.sub.3 -(CH.sub.2).sub.n -O-SO.sub.2 -OM

wherein n is an integer from 9 to 17, inclusive, and M is sodium or potassium, and mixtures thereof until a sufficient amount of the antibiotic AV290-alkyl sulfate complex is imparted to said medium;

d. removing the precipitated antibiotic AV290-alkyl sulfate complex; and

e. drying the antibiotic AV290-alkyl sulfate complex.
Other info:

Inventors: Waite, Jack Peter (Fareham, EN)

Application Number: 503557
Filing Date: 1974-09-05
Publication_date: 1976-04-13
Assignee: American Cyanamid Company (Stamford, CT)
Primary Class(es): 424/115 424/123
Other Classes:
US Patent Ref:

3338786	Aug, 1967	Kunstmann	424/118.
3832462	Aug, 1974	Shu et al.	424/118.
3856937	Dec, 1974	Waite	424/115.

Other Refs:
Primary Examiner: Waddell, Frederick E.
Assistant Examiner:
Attorney: Conroy, Jr.; Edward A.