AT128376B - Process for the saccharification of cellulose-containing material. - Google Patents
Process for the saccharification of cellulose-containing material.Info
- Publication number
- AT128376B AT128376B AT128376DA AT128376B AT 128376 B AT128376 B AT 128376B AT 128376D A AT128376D A AT 128376DA AT 128376 B AT128376 B AT 128376B
- Authority
- AT
- Austria
- Prior art keywords
- saccharification
- hydrogen fluoride
- cellulose
- containing material
- mixture
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 9
- 239000000463 material Substances 0.000 title description 9
- 229920002678 cellulose Polymers 0.000 title description 3
- 239000001913 cellulose Substances 0.000 title description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 13
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000012084 conversion product Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Polysaccharides And Polysaccharide Derivatives (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Verzuckerung von cellulosehaltigem Material.
Es ist ein Verfahren zur Umwandlung von Polysacchariden oder solche enthaltenden Stoffen bekannt, bei dem diese ohne wesentlichen Wasserzusatz bei niederen Temperaturen so lange mit hochkonzentrierter oder wasserfreier Flusssäure in flüssigem oder gasförmigem Zustand behandelt werden, bis die erhaltenen Umwandlungsprodukte auch nach Entfernung der Flusssäure praktisch in Wasser löslich sind.
Es wurde nun gefunden, dass dieses Verfahren vorteilhaft in der Weise ausgeführt wird, dass man gasförmigen Fluorwasserstoff in Mischung mit inerten Gasen auf das zu behandelnde Material zur Einwirkung bringt.
Lässt man z. B. zwecks Verzuckerung von Holz auf Sägemehl unverdünnten Fluorwasserstoff in gasförmigem Zustand einwirken, so schrumpft das Sägemehl an den Stellen, an die der Fluorwasserstoff zuerst gelangt, schnell zusammen. Es bilden sich Massen, die unverzuckertes Material einschliessen und eine weitere Verzuckerung verhindern. Verwendet man dagegen ein Gemisch von beispielsweise gleichen Volumteilen Fluorwasserstoff und Luft, so dringt der Fluorwasserstoff in das zu verzuckernde Material vollständig ein, ehe es zusammenschrumpft. Es wird infolgedessen eine erheblich höhere Ausbeute an wasserlöslichen Produkten erzielt.
Es ist beim Arbeiten nach dem in der Einleitung erwähnten Verfahren demnach nicht notwendig, die durch Verdampfung zweckmässig durch Erhitzen auf ungefähr 100 C unter Überleiten eines inerten Gasstromes, z. B. Luft, aus dem umgewandelten Material freigemachten Fluorwasserstoffdämpfe zuerst zu kondensieren, um sie für einen neuen Umwandlungsprozess zu verwenden, man kann vielmehr das erhaltene Gasgemisch, gegebenenfalls nach Kühlung, unmittelbar auf frisches Material einwirken lassen.
Der Fluorwasserstoff der Mischung wird dann praktisch vollständig von frischem Holz aufgenommen und mit vorzüglichem Erfolg zur Verzuckerung verwertet.
PATENT-ANSPRÜCHE :
1. Verfahren zur Verzuckerung von eellulosehaltigem Material, dadurch gekennzeichnet, dass man gasförmigen Fluorwasserstoff in Mischung mit inerten Gasen auf das zu behandelnde Material zur Einwirkung bringt.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for the saccharification of cellulose-containing material.
A process for converting polysaccharides or substances containing them is known in which they are treated with highly concentrated or anhydrous hydrofluoric acid in liquid or gaseous state without substantial addition of water at low temperatures until the conversion products obtained are practically in water even after the hydrofluoric acid has been removed are soluble.
It has now been found that this process is advantageously carried out in such a way that gaseous hydrogen fluoride in a mixture with inert gases is brought to act on the material to be treated.
If you let z. B. act on sawdust undiluted hydrogen fluoride in a gaseous state for the purpose of saccharification of wood, the sawdust shrinks quickly at the points where the hydrogen fluoride first reaches. Masses are formed that enclose unsugarged material and prevent further saccharification. If, on the other hand, a mixture of, for example, equal parts by volume of hydrogen fluoride and air is used, the hydrogen fluoride penetrates completely into the material to be saccharified before it shrinks. As a result, a considerably higher yield of water-soluble products is achieved.
When working according to the method mentioned in the introduction, it is therefore not necessary to evaporate, expediently, by heating to about 100 ° C. while passing over an inert gas stream, e.g. B. air, first to condense hydrogen fluoride vapors released from the converted material in order to use them for a new conversion process. Rather, the gas mixture obtained can act directly on fresh material, if necessary after cooling.
The hydrogen fluoride in the mixture is then almost completely absorbed by fresh wood and used with excellent success for saccharification.
PATENT CLAIMS:
1. A process for the saccharification of cellulose-containing material, characterized in that gaseous hydrogen fluoride in a mixture with inert gases is applied to the material to be treated.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE128376X | 1930-03-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT128376B true AT128376B (en) | 1932-05-25 |
Family
ID=5662525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT128376D AT128376B (en) | 1930-03-17 | 1931-02-28 | Process for the saccharification of cellulose-containing material. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT128376B (en) |
-
1931
- 1931-02-28 AT AT128376D patent/AT128376B/en active
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