Claims
- 1. A process for the preparation of a clarified xanthan gum solution, said process comprising the steps of:
1) treating an aqueous solution containing xanthan gum with at least one chelating agent, surfactant, organic acid, or a mixture thereof; and 2) treating with a lysozyme and a protease enzyme at a temperature of about 40° C. to about 80° C. at a pH of about 6 to about 8; wherein said xanthan gum solution is not subjected to heating at a pH of 9 or greater.
- 2. A process for the preparation of a clarified xanthan gum solution, said process comprising the steps of:
1) treating an aqueous solution containing xanthan gum with at least one chelating agent; and 2) treating with a protease enzyme at a temperature of about 40° C. to about 80° C. at a pH of about 6 to about 8.
- 3. The process for the preparation of a clarified xanthan gum solution according to claim 1, wherein step 1 and step 2 are conducted simultaneously at a pH of about 6 to about 8 at a temperature of about 40° C. to about 80° C.
- 4. The process for the preparation of a clarified xanthan gum solution according to claim 2, wherein step 1 and step 2 are conducted simultaneously at a pH of about 6 to about 8 at a temperature of about 40° C. to about 80° C.
- 5. The process according to claims 1 or 3, wherein the aqueous xanthan solution is treated with at least one chelating agent.
- 6. The process according to claims 1 or 3, wherein the aqueous xanthan solution is treated with one or more surfactants.
- 7. The process according to claims 1 or 3, wherein the aqueous xanthan solution is treated with one or more organic acids.
- 8. The process according to claims 1 or 3, wherein the aqueous xanthan solution is treated with a chelating agent and one or more surfactants.
- 9. The process according to claim 8, wherein the aqueous xanthan solution is treated with one or more organic acids and one or more surfactants.
- 10. The process according to any one of claims 1 or 2, further comprising heating the xanthan solution of step 1 at a temperature of about 50° C. to about 120° C.
- 11. The process according to any one of claims 1 or 2, wherein the enzyme treatment is conducted at a pH of about 6.5 to about 7.5.
- 12. The process according to any one of claims 1 or 2, wherein the enzyme treatment is conducted at a temperature of about 50° C. to about 70° C.
- 13. The process according to claims 3 or 4, wherein the xanthan solution is treated at a pH of about 6.5 to about 7.5 and at a temperature of about 50° C. to about 70° C.
- 14. The process according to any one of claims 1 to 4, wherein the at least one chelating agent is selected from ethylenediamine tetraacetic acid, phosphoric acid, metaphosphoric acid, carbonic acid, citric acid, tartaric acid, gluconic acid, glutamic acid, pyrophosphoric acid, polyphosphoric acid, metaphosphoric acids, saccharic acid, cationic ion exchange resin, ethylenediamine and ethyleneglycol-bis-(beta-aminoethyl ether)-N,N,N′,N′-tetraacetic acid or a salt thereof.
- 15. The process according to any one of claims 1 to 4, wherein the at least one chelating agent is selected from disodium ethylenediamine tetraacetate, dipotassium ethylenediamine tetraacetate, tetrasodium ethylenediamine tetraacetate, tetrapotassium ethylenediamine tetraacetate, trisodium citrate, tripotassium citrate, sodium hexametaphosphate, potassium hexametaphosphate, sodium polyphosphate, potassium polyphosphate, sodium pyrophosphate, potassium pyrophosphate, monosodium phosphate, monopotassium phosphate, disodium phosphate, dipotassium phosphate, trisodium phosphate, tripotassium phosphate, sodium bicarbonate, sodium carbonate, potassium carbonate, potassium bicarbonate, a cationic ion exchange resin, ethylenediamine dihydrochloride, ethylenediamine diacetate, ethylenediamine lithium salt, ethylenediamine dihydroiodide and mixtures thereof.
- 16. The process according to claims 1 or 3, wherein the at least one surfactant is selected from lecithin, a monoglyceride, a tartaric acid ester of a monoglyceride, a phosphated monoglyceride, a lactylated monoglyceride, an acetylated monoglyceride, a succinylated monoglyceride, an ethoxylated monoglyceride, a sorbitan ester, a polysorbate, a polyglycerol ester, a sucrose ester, a sodium stearoyl lactylate and a propylene glycol ester.
- 17. The process according to claims 1 or 3, wherein the at least one organic acid is selected from lactic acid, benzoic acid, propionic acid, sorbic acid, acetic acid.
- 18. A high purity xanthan gum prepared by the process of isolating the xanthan gum from the clarified xanthan gum solution according to any one of claims 1 to 4.
- 19. The xanthan gum according to claim 18, wherein an aqueous solution of said xanthan gum possesses a transmittance of at least 90%.
- 20. An enhanced oil recovery fluid comprising the xanthan gum according to claim 18.
- 21. An ingestible product comprising the xanthan gum according to claim 18.
- 22. The product according to claim 21, wherein said product is selected from a food product or a pharmaceutical composition.
- 23. A cleaner or personal care product comprising the xanthan gum according to claim 18.
- 24. The product according to claim 23, wherein said product is selected from a gel toothpaste, a liquid soap, a styling gel or a shampoo.
Parent Case Info
[0001] This application claims the benefit of U.S. Provisional Patent Application No. 60/196,926, filed Apr. 14, 2000.
Provisional Applications (1)
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Number |
Date |
Country |
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60196926 |
Apr 2000 |
US |