AT119971B - Process for cleaning wood sugar solutions. - Google Patents
Process for cleaning wood sugar solutions.Info
- Publication number
- AT119971B AT119971B AT119971DA AT119971B AT 119971 B AT119971 B AT 119971B AT 119971D A AT119971D A AT 119971DA AT 119971 B AT119971 B AT 119971B
- Authority
- AT
- Austria
- Prior art keywords
- sugar solutions
- wood sugar
- cleaning wood
- solution
- cleaning
- Prior art date
Links
Landscapes
- Paper (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
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Verfahren zur Reinigung von Holzzuckerlösungen.
EMI1.1
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mühle ein. Dann setzt man 100 Teile frischgelöschten Kalkes hinzu und verrührt in der Kugelmühle und mahlt die Masse während einer Zeitdauer von 1% Stunden. Es entsteht ein dünner, unfühlbarer Brei, der in eine Zentrifuge mit durchbrochener Wandung eingeführt und hier in üblicher Weise durch Schleudern entwässert wird. Die Feststoffe des behandelten Breies setzen sich in dichter Schicht an die Zentrifugenwand an. Sobald dies geschehen ist, wäscht man unter Zentrifugieren mit Eiswasser so lange, bis keine Chlorreaktion mehr auftritt. Das Sacharat wird in Wasser aufgeschlemmt, was zweckmässig wiederum durch Mahlung geschieht und in Druckflasche mit Kohlensäure bei 1 Atm. Überdruck saturiert.
Die Kohlehydratlosung wird vom Saturationsschlamm abgeschieden und durch Erhitzen mit 2% Schwefelsäure in üblicher Weise invertiert. Aus der invertierten Lösung wird die Schwefelsäure wie üblich bei gewöhnlicher Temperatur mit Kreide neutralisiert. Die vom Gips abgetrennte Lösung wird durch Herüberleiten über aktive Kohle filtriert und entfärbt und dann die Lösung eingedampft. Die Ausbeute an reinem Zucker beträgt etwa 65% des als Ausgangsmaterial benutzten entsäuerten Hydrolyseproduktes oder berechnet auf das zur Gewinnung des Hydrolyseproduktes benutzte Holz etwa 45%.
Der Rest des Zuckers, das sind etwa 25% des Holzgewichts (da 70% des Holzgewichts an Kohlehydrat technisch gewonnen werden können), verbleiben in der durch die Zentrifuge abgeschiedenen Lösung. Diese Lösung kann zweckmässig vergoren oder auf Hefe verarbeitet werden.
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Process for cleaning wood sugar solutions.
EMI1.1
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mill a. 100 parts of freshly slaked lime are then added and the mixture is stirred in a ball mill and the mass is ground for a period of 1% hours. A thin, imperceptible pulp is created, which is introduced into a centrifuge with a perforated wall and dewatered here in the usual way by centrifuging. The solids of the treated pulp adhere to the centrifuge wall in a dense layer. As soon as this has happened, it is washed with ice water while centrifuging until the chlorine reaction no longer occurs. The sacharate is suspended in water, which in turn is conveniently done by grinding and in a pressurized bottle with carbonic acid at 1 atm. Saturated overpressure.
The carbohydrate solution is separated from the saturation sludge and inverted in the usual way by heating with 2% sulfuric acid. From the inverted solution, the sulfuric acid is neutralized with chalk as usual at normal temperature. The solution separated from the gypsum is filtered and decolorized by passing it over active charcoal, and the solution is then evaporated. The yield of pure sugar is about 65% of the deacidified hydrolysis product used as starting material or about 45% calculated on the wood used to obtain the hydrolysis product.
The rest of the sugar, around 25% of the weight of the wood (since 70% of the weight of the wood can be obtained technically in carbohydrate), remain in the solution separated by the centrifuge. This solution can be conveniently fermented or processed on yeast.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE119971T | 1927-12-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT119971B true AT119971B (en) | 1930-11-25 |
Family
ID=29276977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT119971D AT119971B (en) | 1927-12-14 | 1928-12-13 | Process for cleaning wood sugar solutions. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT119971B (en) |
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1928
- 1928-12-13 AT AT119971D patent/AT119971B/en active
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