Process for producing a fructoside-containing product

Patent metadata

Field	Value
Publication number	US-9902750-B2
Application number	US-201414895027-A
Country	US
Kind code	B2
Filing date	Jun 6, 2014
Priority date	Jun 6, 2013
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A fructoside-containing product is manufactured from a glucose-rich feedstock, in a process where glucose to fructose is isomerized by contacting the glucose-rich feedstock with a basic isomerization catalyst in an alcoholic medium at a temperature of at least 75° C., to yield a fructose-containing product; and where at least part of the fructose-containing product obtained therefrom is reacted with an alcohol in the presence of an acid catalyst to yield a fructoside-containing product.

First claim

The invention claimed is:

1. A process for producing a fructoside-rich product from a glucose-rich feedstock, process consists of comprises isomerizing glucose to fructose from a glucose-rich feedstock by contacting the glucose-rich feedstock in an alcoholic medium with a basic isomerization catalyst at a temperature of at least 75° C., in an isomerization zone to yield an isomerized product containing a mixture of glucose and fructose, and reacting at least part of the isomerized product containing the mixture of glucose and fructose with an alcohol in the presence of an acid catalyst in a conversion zone wherein the alcohol is selected from C1 to C4 alkanols to yield a glucose- and fructoside-containing conversion product, and optionally the step of purifying the fructoside-rich product to yield purified fructoside;
wherein the glucose-rich feedstock is passed to the isomerization zone or the conversion zone;
wherein at least a fraction of the isomerized product is passed to the conversion zone and at least a fraction of the conversion product is passed to the isomerization zone; and
wherein either product from the isomerisation zone or product from the conversion zone is split into at least two fractions, at least one fraction that is split off being recovered as fructoside-rich product.

2. The process according to claim 1 , wherein the basic catalyst is selected from the group consisting of hydrotalcite, alkali-exchanged zeolites, alkali metal oxides, alkali metal hydroxides, alkaline earth metal oxides, alkaline earth metal hydroxides, alkali metal alcoholates, alkali metal borates, alkali metal boronates, alkali metal borinates, alkali metal carbonates, alkaline earth metal carbonates and mixtures thereof.

3. The process according to claim 1 , wherein the isomerization is conducted at a temperature of 75 to 180° C.

4. The process according to claim 1 , wherein the isomerization is conducted at a pressure from 1 to 60 bar.

5. The process according to claim 1 , wherein the contact time of the glucose-rich feedstock in the alcoholic medium ranges from 0.1 to 10 hr.

6. The process according to claim 1 , wherein the C1 to C4 alkanol is methanol.

7. The process according to claim 1 , wherein the at least part of the isomerized product is reacted with the alcohol in the presence of an acid catalyst, selected from the group consisting of acidic zeolites and acidic ion exchange resins.

8. The process according to claim 1 , wherein the at least part of the isomerized product is reacted with the alcohol at a temperature of 20 to 100° C.

9. The process according to claim 1 , wherein the contact time of the at least part of the isomerized product with the alcohol ranges from 0.1 to 12 hr.

10. The process according to claim 1 , wherein the glucose-rich feedstock is passed to the isomerization zone; the at least a fraction of the isomerized product is passed to the conversion zone; and the conversion product is split into at least two fractions, at least one product fraction that is split off from the conversion product being recovered as fructoside-rich product, and at least another fraction of the conversion product being passed to the isomerization zone.

11. The process according to claim 1 , wherein the glucose-rich feedstock is passed to the isomerization zone; the isomerized product is split into at least two fractions, at least one product fraction that is split off from the isomerized product being recovered as fructoside-rich product, and at least another fraction of the isomerized product being passed to the conversion zone; and subsequently at least a fraction of the conversion product is passed to the isomerization zone.

12. The process according to claim 1 , wherein the glucose-rich feedstock is passed to the conversion zone; subsequently at least a fraction of the conversion product is passed to the isomerization zone; and the isomerized product is split into at least two fractions, at least one product fraction that is split off from the isomerized product being recovered as fructoside-rich product, and at least another fraction of the isomerized product being passed to the conversion zone.

13. The process according to claim 1 , wherein the glucose-rich feedstock is passed to the conversion zone; the conversion product is split into at least two fractions, at least one product fraction that is split off from the conversion product being recovered as fructoside-rich product, and at least another fraction of the conversion product being passed to the isomerization zone; and subsequently at least a fraction of the isomerized product is passed to the conversion zone.

14. The process according to claim 1 , wherein the split of the isomerization product or the conversion product is into two fractions.

15. The process according to claim 1 , wherein before, during or after the split of the isomerization product or the conversion product, water is removed.

16. The process according to claim 15 , wherein water is removed by flashing, distillation, adsorption or a combination thereof.

17. The process according to claim 1 , wherein the glucose-rich feedstock comprises the reaction product of the alcoholysis of sucrose.

18. The process according to claim 17 , wherein the alcoholysis of sucrose is carried out at a temperature ranging from 25 to 150° C.

19. The process according to claim 1 , wherein the glucose-rich feedstock is passed to the conversion zone, wherein the glucose-rich feedstock comprises fructose.

20. The process according to claim 19 , wherein the glucose-rich feedstock is high fructose corn syrup.

21. The process according to claim 1 , wherein the purification comprises a dewatering step.

22. The process according to claim 3 , wherein the isomerization is conducted at a temperature of 80 to 150° C.

23. The process according to claim 3 , wherein the isomerization is conducted at a temperature of 80 to 130° C.

24. The process according to claim 4 , wherein the isomerization is conducted at a pressure of from 2 to 25 bar.

25. The process according to claim 1 , wherein the alcoholic medium in the isomerization is methanol.

26. The process according to claim 1 , wherein the purification comprises an evaporation or adsorption step.

Assignees

• Furanix Technologies Bv
• Synvina C V

Inventors

• Mckay Benjamin
• De Sousa Dias Ana Sofia Vagueiro
• Iqbal Sarwat
• Gruter Gerardus Johannes Maria
• Van Putten Robert Jan

Classifications

• C07H1/00

  Processes for the preparation of sugar derivatives · CPC title

• C07H15/04

  attached to an oxygen atom of the saccharide radical · CPC title

• C13K11/00

  Fructose (separation from invert sugar C13K3/00) · CPC title

• C07H3/02 Primary

  Monosaccharides · CPC title