Tablet compositions containing crosslinked polyvinylpyrrolidone and their use in beverage applications

Abstract

Provided are crosslinked polyvinylpyrrolidone (PVPP) compositions and their use in beverage treatment. Provided is a dry, direct compressed tablet comprising at lease 70 wt % crosslinked PVPP. Also provided is the use of said tablet for the filtering and/or removing polyphenol of a liquid, preferable a beverage.

Claims

1. A method for removing polyphenol from a liquid, comprising (i) contacting the liquid with a dry, direct compressed tablet comprising at least 70 wt % crosslinked polyvinylpyrrolidone (PVPP), and (ii) subsequently filtering, settling or centrifuging the liquid to remove the PVPP, wherein the tablet disintegrates within 10 minutes, in an aqueous or hydro-alcoholic solution.

2. The method according to claim 1, wherein said liquid is a beverage.

3. The method according to claim 2, wherein said beverage is a beer, wine, fruit juice, vinegar, vegetable extract or tea.

4. The method according to claim 1 wherein the tablet comprises at least 85 wt % crosslinked PVPP.

5. The method according to claim 1, wherein the mean particle size of said PVPP is in the range between 1 to 600 μm.

6. The method according to claim 1, wherein the tablet has a diameter of at least 5 mm.

7. The method according to claim 1, wherein the tablet consists essentially of PVPP.

8. The method according to claim 1, wherein the tablet comprises PVPP and one or more further ingredients selected from the group consisting of activated carbon, silicas, bentonite clays, carrageenans, polysaccharides, cellulose fibers, diatomaceous earth and mixtures thereof.

9. The method according to claim 1, wherein the tablet comprises at least 95% crosslinked PVPP.

10. The method according to claim 1, wherein the mean particle size of said PVPP is in the range between 10 to 300 μm.

11. The method according to claim 1, wherein the tablet has a diameter of at least 10 mm.

12. The method according to claim 1, wherein the tablet disintegrates within 5 minutes, in an aqueous or hydro-alcoholic solution.

Description

EXPERIMENTAL SECTION

Example 1: Direct Compression to Form PVPP Tablets

(1) Tablets of PVPP were formed from commercial crosslinked PVPP powder (PolyFilter® 10) having a mean particle size distribution of about 30 microns by direct compression. The details of the actual conditions are outlined in Table 1. As can be seen from the table, acceptable tablet properties are observed for all tableting conditions. All tablet samples show quick dissolution/disintegration time in aqueous solution of less than 3 minutes. After disintegration, the resultant PVPP powder characteristics are the same as in the original powder PVPP material.

(2) TABLE-US-00001 TABLE 1 Tablet Tablet Tablet sample 1 sample 2 sample 3 Tableting machine: Slugging thickness (mm) 4 7 10 Filling depth (mm) 7 9 14 Sheet thickness (mm) 3 6 9 Piece diameter (mm) 10 22 30 Compression force (KN) 30 35 48 Resultant tablet properties: Tablet hardness (N) 70 75 75 Tablet weight (mg) 420 1500 3300 Disintegration time (min) 2′30″ 2′45″ 2′40″ Friability (%) 0.3 0.6 0.9

(3) Tablets made under the same tableting conditions as outlined in Table 1 using commercial crosslinked PVPP powder (PolyFilter® XL) having mean particle size of 100 microns resulted in dissolution times in aqueous solution ranging from 2 to 2′ 30″ minutes.

Example 2: Polyphenol Adsorption in Beer Treated with PVPP Powders and Tablets

(4) Both the original PVPP powder and the dry, compressed PVPP tablets of the invention were used to treat beer at various PVPP feed concentrations. Both the powder and tablets utilized commercial PVPP powder (PolyFilter® 10) having a mean particle size of about 30 microns. The resultant table gives the summary of the feed rates and resultant polyphenol levels in the beer after treatment. As can be seen from Table 2, there is no difference in the resultant polyphenol concentration for the original PVPP powder and the PVPP tablet of the present invention. Thus, the resultant PVPP tablets have a similar polyphenol adsorption capacity as compared to the original PVPP powder.

(5) TABLE-US-00002 TABLE 2 PVPP feed concentration (ppm) 0 100 200 300 500 PVPP powder (original) Polyphenol concentration 215 187 170 151 132 in beer after treatment (mg/L) PVPP tablet invention (Direct compression) Polyphenol concentration 217 179 171 150 133 in beer after treatment (mg/L)