Claims
- 1. The strain of Xanthomonas campestris deposited in the CNCM under n.degree.I-956.
- 2. A process of producing conventional xanthan, which comprises cultivating Xanthomonas campestris CNCM I-956 in a nutrient medium containing 50 to 500 mg/l of an alkali metal hexametaphosphate and 1 to 15 mg/l of calcium ions.
- 3. The process according to claim 2 wherein the previous growth phase of the microorganism takes place in a medium containing glycerol as the only carbon source.
- 4. The process according to claim 2 wherein said alkali metal hexametaphosphate is sodium hexametaphosphate.
- 5. The process as claimed in claim 3, wherein said alkali metal hexametaphosphate is sodium hexametaphosphate.
- 6. The process as claimed in claim 2, wherein the nutrient medium initially contains 200 to 300 mg/l of alkali metal hexametaphosphate.
- 7. The process as claimed in claim 2, wherein the viscosity of the medium is less than 32 mPa.s after a cultivation time of 24 hours.
- 8. A process of producing non-viscous xanthan, an aqueous solution of which at a concentration of 10 g/l has a viscosity of less than 700 mPa.s at 25.degree. C. which comprises cultivating Xanthomonas campestris CNCM I-956 in a nutrient medium containing 50 to 500 mg/l of an alkali metal hexametaphosphate and 1 to 15 mg/l of calcium ions and stopping the culture when the viscosity of the medium increases.
- 9. The according to claim 8 wherein the previous growth phase of the mirooganism takes place in a medium containing glycerol as the only carbon source.
- 10. The process as claimed in claim 9, wherein said alkali metal hexametaphosphate is sodium hexametaphosphate.
- 11. The process according to claim 8 wherein said alkali metal hexametaphosphate is sodium hexametaphosphate.
- 12. The non-viscous xanthan aqueous solution that has a viscosity of less than 700 mPa.s at a concentration of 10 g/l and a temperature of 25.degree. C., the xanthan in the aqueous solution being made by the process of claim 8.
- 13. The process as claimed in claim 8, wherein the nutrient medium initially contains 200 to 300 mg/l of alkali metal hexametaphosphate.
- 14. The non-viscous xanthan aqueous solution that has a viscosity of less than 250 mPa.s at a concentration of 10 g/l and a temperature of 25.degree. C., the xanthan in the aqueous solution being made by the process of claim 8.
- 15. The non-viscous xanthan, an aqueous solution of which has a viscosity of less than 700 mPa.s at a concentration of 10 g/l and a temperature of 25.degree. C., said xanthan being made by the process of claim 8.
- 16. A non-viscous xanthan having an average molecular weight of about 6 to 7.times.10.sup.5, an aqueous solution of which has a viscosity of less than 700 mPa.s at a concentration of 10 g/l and a temperature of 25.degree. C.
- 17. The non-viscous xanthan as claimed in claim 16, an aqueous solution of which has a viscosity of less than 250 mPa.s at a concentration of 10 g/l and a temperature of 25.degree. C.
Priority Claims (1)
Number |
Date |
Country |
Kind |
90 16515 |
Dec 1990 |
FRX |
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Parent Case Info
This application is a division of application Ser. No. 07/813,838, filed Dec. 27, 1991, now U.S. Pat. No. 5,401,644.
US Referenced Citations (10)
Divisions (1)
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Number |
Date |
Country |
Parent |
813838 |
Dec 1991 |
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