FIELD: preparation of xylite. SUBSTANCE: method is carried out by separating xylonic acid from material containing xylene and xylonic acid and which is essentially cooking liquor of sulfite cooking. Xylose is separated and crystallized. Xylonic acid is separated and reduced to xylite. Reduction is carried out at temperatures from 70 to 150 C, pressures from 10.000 to 13.000 KPa in the pressure of catalyst which includes Ru, Pd, Pt, Rh and Ni-Raney based compounds and sodium boron hydride as metal hydride reagent Xylite is isolated by chromatography or by crystallization. EFFECT: preparation of xylite with high yield from sulfite cooking liquor. 41 cl, 11 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PREPARING XYLITE | 1997 |
|
RU2176995C2 |
| XYLOSE PRODUCTION PROCESS | 1998 |
|
RU2211074C2 |
| METHOD OF FRACTIONING SULFITE COOKING LIQUOR | 1994 |
|
RU2110317C1 |
| SOLUTION FRACTIONATION METHOD | 1995 |
|
RU2136345C1 |
| METHOD OF PREPARING XYLITOL FROM XYLOSE AN AQUEOUS SOLUTION | 1990 |
|
RU2108388C1 |
| METHOD OF XYLOSE EXTRACTION FROM SOLUTIONS | 1996 |
|
RU2177038C2 |
| METHOD OF EXTRACTION OF ORGANIC COMPOUND FROM SOLUTION | 1996 |
|
RU2184148C2 |
| METHOD OF OBTAINING XYLOSE AND CELLULOSE FOR CHEMICAL RECYCLING | 2009 |
|
RU2512339C2 |
| METHOD OF FRACTIONATION THROUGH CHROMATOGRAPHIC PROCESS SIMULATING MOVABLE LAYER | 1997 |
|
RU2191617C2 |
| METHOD OF RECOVERING SACCHARS AND LIGNOSULFONATES FROM SPENT SULFITE LYE | 0 |
|
SU1500164A3 |
