CH203860A - Process for the preparation of a water-soluble condensation product. - Google Patents
Process for the preparation of a water-soluble condensation product.Info
- Publication number
- CH203860A CH203860A CH203860DA CH203860A CH 203860 A CH203860 A CH 203860A CH 203860D A CH203860D A CH 203860DA CH 203860 A CH203860 A CH 203860A
- Authority
- CH
- Switzerland
- Prior art keywords
- water
- cresol
- raw
- soluble
- preparation
- Prior art date
Links
- 239000007859 condensation product Substances 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 4
- 238000002360 preparation method Methods 0.000 title claims description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 18
- 229930003836 cresol Natural products 0.000 claims description 12
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000002378 acidificating effect Effects 0.000 claims description 3
- -1 cresol sulfone Chemical class 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 150000004682 monohydrates Chemical class 0.000 claims description 3
- 230000020477 pH reduction Effects 0.000 claims description 3
- 239000003929 acidic solution Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000010985 leather Substances 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 229940101006 anhydrous sodium sulfite Drugs 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
- C14C3/18—Chemical tanning by organic agents using polycondensation products or precursors thereof
- C14C3/20—Chemical tanning by organic agents using polycondensation products or precursors thereof sulfonated
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Coloring (AREA)
Description
Verfahren zur Darstellung eines wasserlöslichen Kondensationsproduktes. Gegenstand des vorliegenden Zusatz patentes ist ein Verfahren zur Darstellung eines wasserlöslichen Kondensationsproduktes, dadurch gekennzeichnet, dass man Rohkresol- sulfon, wie es erhältlich ist durch Erhitzen von Rohkresol mit Monohydrat und Erhitzen der erhaltenen Rohkresolmonosulfonsäure mit Rohkresol im Vakuum,
erst alkalisch mit Formaldehyd vorkondensiert und dann mit einem Gemisch aus neutralem und saurem Sulfit und Formaldehyd kondensiert, bis das Harz, das beim Ansäuern ausfällt, in Wasser klar löslich ist, worauf das Kondensat mit verdünnter Mineralsäure behandelt und das gefällte Harz abgetrennt wird.
Die neue Verbindung ist ein helles Pulver, das in Wasser sehr gut löslich ist und in saurer Lösung Blösse in ein weisses, gut gefülltes Leder von sehr guter Lichtechtheit verwandelt.
Beispiel: 100 Teile Rohkresolsulfon, hergestellt durch Erhitzen von aus Rohkresol und Mono- hydrat in der Hitze erhaltener Rohkresol- monosulfonsäure mit Rohkresol im Vakuum gemäss der Patentschrift Nr.
190422, 23 Teile Natronlauge 30 % und 50 Teile Wasser wer- den 21/s Stunden bei 100 0 C mit 16 Teilen Formaldehyd 30 %ig erhitzt. Nach Zugabe von 28 Teilen Natriumsulfit wasserfrei und einer Lösung von 35 Teilen Natriumbisulfit
(25 % SO2) und 38 Teilen Formaldehyd 30 % wird so lange auf 100 0 C erhitzt (ca. 5 Stun den), bis das Harz, das beim Ansäuern aus fällt, in Wasser wieder klar löslich ist. Dann wird der ganze Ansatz mit verdünnter Mineral säure behandelt, das gefällte Harz abgetrennt, getrocknet oder durch Verrühren mit Wasser wieder gelöst. Vor der Verwendung als Gerb stoffbrühe wird schwach sauer gestellt.
Process for the preparation of a water-soluble condensation product. The subject of the present additional patent is a process for the preparation of a water-soluble condensation product, characterized in that raw cresol sulfone, as it is obtainable by heating raw cresol with monohydrate and heating the resulting raw cresol monosulfonic acid with raw cresol in a vacuum,
First precondensed with alkaline formaldehyde and then condensed with a mixture of neutral and acidic sulfite and formaldehyde until the resin, which precipitates out on acidification, is clearly soluble in water, whereupon the condensate is treated with dilute mineral acid and the precipitated resin is separated off.
The new compound is a light-colored powder that is very soluble in water and, in an acidic solution, transforms pelt into a white, well-filled leather of very good lightfastness.
Example: 100 parts of raw cresol sulfone, produced by heating raw cresol monosulfonic acid obtained from raw cresol and monohydrate in the heat with raw cresol in a vacuum according to patent no.
190422, 23 parts of 30% sodium hydroxide solution and 50 parts of water are heated for 21 / s hours at 100 ° C. with 16 parts of 30% formaldehyde. After adding 28 parts of anhydrous sodium sulfite and a solution of 35 parts of sodium bisulfite
(25% SO2) and 38 parts of 30% formaldehyde is heated to 100 ° C. (approx. 5 hours) until the resin, which falls out on acidification, is again clearly soluble in water. Then the whole batch is treated with dilute mineral acid, the precipitated resin is separated off, dried or redissolved by stirring with water. Before being used as a tanning stock, it is made slightly acidic.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH203860T | 1937-06-10 | ||
| CH199785T | 1937-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH203860A true CH203860A (en) | 1939-03-31 |
Family
ID=25723353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH203860D CH203860A (en) | 1937-06-10 | 1937-06-10 | Process for the preparation of a water-soluble condensation product. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH203860A (en) |
-
1937
- 1937-06-10 CH CH203860D patent/CH203860A/en unknown
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