Claims
- 1. A process for preparing a second dextrose composition having a solids content of at least 99% dextrose comprising
- nanofiltering a first dextrose composition having a solids content of about 80 to 97% by weight dextrose and at least 2% of saccharides selected from the group consisting of di-saccharides, trisaccharides and mixtures thereof; and
- recovering as the permeate said second dextrose containing a solids content of at least 99% dextrose.
- 2. The process of claim 1 wherein said first dextrose composition has a solids content of 85 to 96% by weight dextrose.
- 3. The process of claim 1 comprising maintaining the pressure of said nanofiltering step in the range of 400 to 450 psig and at a temperature in the range of 50.degree. F. to 70.degree. F.
- 4. The process of claim 1 comprising nanofiltering said first dextrose composition with a negatively charged polyamide nanofilter which has a pressure range of 70-300 psig, a pH range of 2-11, a maximum feed temperature of 70.degree. C., a minimum MgSO.sub.4 solute rejection of 96% based on 1000 mg/l solute feed solution at 70 psig net pressure and 25.degree. C. and pH of 5-8 and 10% recovery;
- and a glucose, sucrose and lactose rejection of at least 97% based on 70 psig net pressure, 25.degree. C. and 10% recovery.
- 5. The process of claim 1 comprising nanofiltering said first dextrose composition with a negatively charged polyamide nanofilter which has a pressure range of 70-300 psig, a pH range of 2-11, a maximum feed temperature of 70.degree. C., a minimum MgSO.sub.4 solute rejection of 96% based on 1000 mg/l solute feed solution at 70 psig net pressure and 25.degree. C. and pH of 5-8 and 10% recovery;
- and a glucose, sucrose and lactose rejection of at least 99% based on 100 psig net pressure, 25.degree. C. and 10% recovery.
- 6. The process of claim 1 comprising nanofiltering said first dextrose composition with a negatively charged nanofilter which has a pressure range of up to 600 psig, a pH range of 2-11, a 200-300 molecular weight cut-off.
- 7. The process of claim 1 comprising
- feeding said first dextrose composition to a negatively charged nanofilter at a pressure of 100 to 500 psig and at a temperature of 100.degree. F. to 160.degree. F.
- 8. The process of claim 7 wherein said first dextrose composition has dissolved solids content of 5 to 50% and 88 to 96% dextrose.
- 9. The process of claim 1 which includes preparing said first dextrose composition from a corn starch slurry which is first gelatinized then dextrinized, then saccharified.
- 10. The process of claim 2 which includes preparing said first dextrose composition from a corn starch slurry which is first gelatinized then dextrinized, then saccharified.
- 11. The process of claim 6 which includes preparing said first dextrose composition from a corn starch slurry which is first gelatinized then dextrinized, then saccharified.
- 12. The process of claim 9 wherein said corn starch is gelatinized for 3 to 7 minutes, dextrinized for 1 to 3 hours and saccharified for at least 36 hours.
- 13. The process of claim 10 wherein said corn starch is gelatinized for 3 to 7 minutes, dextrinized for 1 to 3 hours and saccharified for at least 36 hours.
- 14. The process of claim 11 wherein said corn starch is gelatinized for 3 to 7 minutes, dextrinized for 1 to 3 hours and saccharified for at least 36 hours.
Parent Case Info
This is a continuation-in-part of our application Ser. No. 07/498,344 filed Mar. 23, 1990, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4429122 |
Zupancic |
Jan 1984 |
|
4747953 |
Zupancic et al. |
May 1988 |
|
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
498344 |
Mar 1990 |
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