AT106018B - Process for the production of condensation products from the waste and wash water and distillates that fall off during the production of condensation products from phenols and formaldehyde. - Google Patents
Process for the production of condensation products from the waste and wash water and distillates that fall off during the production of condensation products from phenols and formaldehyde.Info
- Publication number
- AT106018B AT106018B AT106018DA AT106018B AT 106018 B AT106018 B AT 106018B AT 106018D A AT106018D A AT 106018DA AT 106018 B AT106018 B AT 106018B
- Authority
- AT
- Austria
- Prior art keywords
- condensation products
- production
- waste
- distillates
- formaldehyde
- Prior art date
Links
Landscapes
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Description
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Verfahren zur Gewinnung von Kondensationsprodukten aus den bei Herstellung von
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Bekanntlich werden bei der Kondensation von Phenolen und wässerigen Formaldehydlösungen unter bestimmten Arbeitsbedingungen zwei Phasen des Reaktionsgemisches erhalten, nämlich eine harzartige Phase von Zwisehenkondensationsprodukten und eine wässerige Phase, die unverbundene. reaktive und auch Zwischenkondensationsprodukte enthält.
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steigender Temperatur behandelt. Die hiebei ausgeschiedenen harzartigen Flüssigkeiten können entweder als nicht härtbare Kondensationsprodukte zur Herstellung von Lacken Verwendung finden oder durch Kochen mit weiteren Formaldehydmengen bei Gegenwart alkalischer Kondensationsmittel in härtbare Kondensationsprodukte überführt werden. Zur Durchführung des Verfahrens kann man z.
B. in folgender Weise vorgehen : Das bei der Kondensation von gleichen Gewichtsteilen Phenol und 30"oiger wässeriger
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stehen gelassen. Am Boden des Gefässes Scheidet sich eine harzartige Phase, kurz Säureharz genannt. aus, die zweimal mit dem gleichen Volumen Wasser gewaschen wird. Dieses gewaschene Harz. in bekannter Weise eingedickt, ergibt einen festen Novolak, der z. B. zur Herstellung von Lacken Verwendung finden kann. Durch Kochen des Säureharzes mit weiteren Formaldehydmengen in Gegenwart eines alkalischen Kondensationsmittels kann ein durch Wärmebehandlung härtbares Harz (Resitol) erhalten werden.
2. An Stelle der in Beispiel 1 genannten Schwefelsäure kann man für 1000 gAbwasser 100 g H Cl von 15 % zusetzen. Es ergibt sich ein ähnliches Harz, das wie in Beispiel 1 weiterbehandelt werden kann.
3, 1000 g Abwasser werden mit 300 g Na H SO4 Lösung (20So) versetzt und in gleicher Weise, wie beim ersten Beispiel dargelegt, weiterbehandelt.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
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Process for the production of condensation products from the production of
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It is known that in the condensation of phenols and aqueous formaldehyde solutions under certain working conditions, two phases of the reaction mixture are obtained, namely a resinous phase of intermediate condensation products and an aqueous phase, the unconnected one. contains reactive and also intermediate condensation products.
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treated with increasing temperature. The resinous liquids separated can either be used as non-hardenable condensation products for the production of paints or can be converted into hardenable condensation products by boiling with further amounts of formaldehyde in the presence of alkaline condensation agents. To carry out the process you can, for.
B. proceed in the following way: That in the condensation of equal parts by weight of phenol and 30 "oiger aqueous
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ditched. A resinous phase, called acid resin for short, separates out at the bottom of the vessel. which is washed twice with the same volume of water. This washed resin. Thickened in a known manner, results in a solid novolak z. B. can be used for the production of paints. By boiling the acid resin with further amounts of formaldehyde in the presence of an alkaline condensing agent, a resin (resitol) curable by heat treatment can be obtained.
2. Instead of the sulfuric acid mentioned in Example 1, 100 g of 15% HCl can be added for 1000 g of waste water. A similar resin results, which can be treated further as in Example 1.
3, 1000 g of wastewater are mixed with 300 g of Na H SO4 solution (20So) and treated further in the same way as in the first example.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT106018T | 1921-05-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT106018B true AT106018B (en) | 1927-03-25 |
Family
ID=3623457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT106018D AT106018B (en) | 1921-05-27 | 1921-05-27 | Process for the production of condensation products from the waste and wash water and distillates that fall off during the production of condensation products from phenols and formaldehyde. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT106018B (en) |
-
1921
- 1921-05-27 AT AT106018D patent/AT106018B/en active
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