Process Tolerant Starch Composition with High Total Dietary Fiber Content

Abstract

The present invention relates to a starch composition with high total dietary fiber (TDF) that retains its TDF upon processing. In particular, over 50% of such fiber is retained upon extrusion processing. Such starch is useful in the manufacture of high fiber food products, including extruded products such as breakfast cereals and snacks.

Description

Claims

1. A composition comprising a starch which has been phosphorylated using sodium trimetaphosphate or a combination of sodium trimetaphosphate and sodium tripolyphosphate and heat-moisture treated, wherein the phosphorylated, heat-moisture treated starch is granular and has a total dietary fiber content of at least 90% by weight; and a second ingredient appropriate for consumption.

2. The composition of claim 1, wherein the starch is a high amylose starch.

3. The composition of claim 1, wherein the starch contains from 0.1-0.4% residual phosphorus by weight of the starch.

4. The composition of claim 1, wherein the modified starch has at least a 50% absolute increase in total dietary fiber content compared to the unmodified starch.

5. The composition of claim 1, wherein the modified starch has at least a 70% absolute increase in total dietary fiber content compared to the unmodified starch.

6. The composition of claim 1, wherein the modified starch has at least an 80% absolute increase in total dietary fiber content compared to the unmodified starch.

7. A process of preparing a starch comprising: a) heat-moisture treating a starch having a total moisture content of from about 10% to about 80% by weight based on the dry weight of the starch, at a temperature of from about 65 C to about 160° C., under a combination of moisture and temperature conditions to provide a heat-moisture treated starch which is granular; andb) crosslinking the heat-moisture treated starch in a slurry using sodium trimetaphosphate or a combination of sodium trimetaphosphate and sodium tripolyphosphate at a pH maintained at greater than 10.0.

8. A process of preparing a starch comprising: a) crosslinking the heat-moisture treated starch in a slurry using sodium trimetaphosphate or a combination of sodium trimetaphosphate and sodium tripolyphosphate at a pH maintained at greater than 10.0; andb) heat-moisture treating the crosslinked starch having a total moisture content of from about 10% to about 80% by weight based on the dry weight of the starch, at a temperature of from about 65 C to about 160° C., under a combination of moisture and temperature conditions to provide a heat-moisture treated starch which is granular.

9. The process of claim 7 or 8, herein the heat-moisture treatment is for 30 seconds to 15 minutes.

10. The process of claim 7 or 8, wherein the heat-moisture treatment is for 0.25 hours to 24 hours.

11. The process of claim 10, wherein the heat-moisture treatment is for 1 hour to 4 hours.

12. The process of claim 7 or 8, wherein the heat-moisture treatment is at a temperature of from 90° C. to 130° C.

13. The process of claim 12, wherein the heat-moisture treatment is at a temperature of from 90° C. to 120° C.

14. The process of claim 7 or 8, wherein the starch has a moisture content of from 15% to 55%.

15. The process of claim 14, wherein the starch has a moisture content of from 20% to 45%.

16. The process of claim 15, wherein the starch has a moisture content of from 25% to 35%.

17. The process of claim 7 or 8, wherein the pH is maintained at greater than 10.5.

18. The process of claim 7 or 8, wherein the heat-moisture treatment is accomplished using dynamic heating.

19. The process of claim 7 or 8, further comprising washing out at least some of the solubles.

20. The process of claim 7 or 8, wherein the steps are conducted to produce a starch with a total dietary fiber content of at least 70% by weight.

21. The process of claim 20, wherein the steps are conducted to produce a starch with a total dietary fiber content of at least 80% by weight.

22. The process of claim 20, wherein the steps are conducted to produce a starch with a total dietary fiber content of at least 90% by weight.

23. The composition of claim 1, wherein the composition has been extruded.

24. A method of preparing an extruded composition comprising extruding a formulation comprising comprising a starch which has been phosphorylated using sodium trimetaphosphate or a combination of sodium trimetaphosphate and sodium tripolyphosphate and heat-moisture treated, wherein the phosphorylated, heat-moisture treated starch is granular and has a total dietary fiber content of at least 90% by weight; and a second ingredient appropriate for consumption at an SME of no greater than 150 Wh/kg and a PT of no greater than 145° C.

25. The method of claim 24, wherein the extrusion is at an SME of no greater than 125 Wh/kg and a PT of no greater than 119° C.

26. A composition prepared by the method of claim 24, wherein the total dietary fiber content of the composition is at least 50% that of the formulation.

27. The composition of claim 26, wherein the total dietary fiber content of the composition is at least 60% that of the formulation.

28. The composition of claim 27, wherein the total dietary fiber content of the composition is at least 75% that of the formulation.

29. The composition of claim 28, wherein the total dietary fiber content of the composition is at least 85% that of the formulation.

30. A composition prepared by the method of claim 24, wherein the starch is a high amylose starch and wherein the total dietary fiber content of the composition is at least 70% that of the formulation.

31. The composition of claim 30, wherein the total dietary fiber content of the composition is at least 80% that of the formulation.

32. The composition of claim 31, wherein the total dietary fiber content of the composition is at least 85% that of the formulation.

33. The composition of claim 32, wherein the total dietary fiber content of the composition is at least 95% that of the formulation.