DE689217C - Process for the preparation of synthetic tanning agents - Google Patents
Process for the preparation of synthetic tanning agentsInfo
- Publication number
- DE689217C DE689217C DE1937G0096834 DEG0096834D DE689217C DE 689217 C DE689217 C DE 689217C DE 1937G0096834 DE1937G0096834 DE 1937G0096834 DE G0096834 D DEG0096834 D DE G0096834D DE 689217 C DE689217 C DE 689217C
- Authority
- DE
- Germany
- Prior art keywords
- preparation
- tanning agents
- synthetic tanning
- condensation
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims description 5
- 238000002360 preparation method Methods 0.000 title claims description 3
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims description 3
- 150000007965 phenolic acids Chemical class 0.000 claims 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- 239000007859 condensation product Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 150000004682 monohydrates Chemical class 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- WHOZNOZYMBRCBL-OUKQBFOZSA-N (2E)-2-Tetradecenal Chemical compound CCCCCCCCCCC\C=C\C=O WHOZNOZYMBRCBL-OUKQBFOZSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229940044654 phenolsulfonic acid Drugs 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 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)
Description
Verfahren zur Darstellung von synthetischen Gerbstoffen Es ist bekannt, zwecks Herstellung von Gerbstoffen Phenolmonosulfonsäure. mit Naphthalinmonosulfonsäure auf Temperaturen von etwa 14o° zu erhitzen (Patentschrift 328 34o). Diese Kondensationsprodukte sind jedoch zu wenig wasserlöslich, weshalb. sie, wie in Beispiel 2 und 3 dieser angezogenen Patentschrift angegeben, noch einer Nachbehandlung mit Schwefelsäure unterworfen werden müssen. Die sulfonierten Kondensationsprodukte besitzen nur geringe Gerbwirkung, so daß damit kein marktfähiges Leder hergestellt werden kann.Process for the preparation of synthetic tanning agents It is known Phenol monosulphonic acid for the production of tanning agents. with naphthalene monosulfonic acid to be heated to temperatures of about 14o ° (patent specification 328 34o). These condensation products however, they are not soluble enough in water, which is why. them as in example 2 and 3 of this cited patent indicated, nor an aftertreatment with sulfuric acid must be subjected. The sulfonated condensation products have only slight Tanning effect, so that no marketable leather can be produced with it.
Es' wurde nun gefunden, .daß nach dem gleichen Kondensationsverfahren, ausgehend von rohen Sulfonierungsgemischen von Naphthalin und Phenol oder von den abgetrennten Phenol- und Naphthalininonosulfonsäuren selbst, bei Anwendung höherer Temperaturen Kondensationsprodukte erhalten werden, die gut wasserlöslich sind und vorzügliche gerbende Eigenschaften sowohl in kongosaurer wie auch lackmussaurer Lösung aufweisen. Die Temperatur für die Kondensation muß über 16o° liegen, am besten bei i70°, denn darunter verläuft die Kondensation zu langsam und darüber, beispielsweisse bei igo bis 20ö°, werden mit steigender Temperatur immer dunklere Erzeugnisse erhalten. Wesentlich für das neue Verfahren ist die ständige Entfernung des Reaktionswassers, was im großen mit Hilfe eines Luftstromes oder durch Verminderung des Luftdruckes im geschlossenen Gefäß erreicht werden. kann.It has now been found that, following the same condensation process, starting from crude sulphonation mixtures of naphthalene and phenol or from the separated phenol and naphthalenonosulfonic acids themselves, if higher ones are used Temperatures condensation products are obtained that are readily water-soluble and excellent tanning properties in both Congo and Lackmussaurer Have solution. The temperature for condensation must be above 160 °, ideally at i70 °, because below the condensation runs too slowly and above it, for example at igo up to 20ö °, the products obtained are darker and darker as the temperature rises. The constant removal of the water of reaction is essential for the new process, what on the whole with the help of an air stream or by reducing the air pressure can be achieved in a closed vessel. can.
Das Verhältnis von Naphthalin- zu Phenolmonosulfonsäure kann -in weiten Grenzen schwanken; ein höherer Gehalt an Phenolsulfonsäure exweist sich insofern günstig, als die gerbenden Eigenschaften der Enderzgugnisse gesteigert werden. $eispiel q.oo Teile Naphthalinmonosulfonsäure, hergestellt durch mehrstündiges Erhitzen von gleichen Teilen" Naphthalin und Monohydrat auf 13o bis iq.o°, und 4ooTeile Phenolmonoasulfonsäure, hergestellt in üblicher Weise aus gleichen Teilen Phenol und Monohydrat bei ioo bis 1o5°, werden z4. Stunden im Vakuum -auf 168 bis 170° erhitzt.The ratio of naphthalene to phenol monosulfonic acid can - fluctuate within wide limits; a higher content of phenolsulfonic acid proves to be beneficial in that the tanning properties of the end products are increased. Example q.oo parts of naphthalene monosulphonic acid, prepared by heating equal parts of naphthalene and monohydrate to 130 to iq.o ° for several hours, and 400 parts of phenol monoasulphonic acid, produced in the usual way from equal parts of phenol and monohydrate at 100 to 1o5 °, are z4. Heated to 168 to 170 ° in vacuo for hours.
Das Enderzeugnis ist in der Kälte ein springhartes Harz; seine gerbenden Eigenschaften sind ausgezeichnet.The end product is a hard resin in the cold; its tanning Properties are excellent.
Wird Luft durch das Reaktionsgemisch geleitet, so werden etwas dunkler gefärbte Produkte erhalten, die jedoch die gleichen vorzüglichen gerberischen Eigenschaften besitzen.If air is passed through the reaction mixture, it becomes a little darker Colored products are obtained, which, however, have the same excellent tannery properties own.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH689217X | 1937-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE689217C true DE689217C (en) | 1940-03-14 |
Family
ID=4529117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1937G0096834 Expired DE689217C (en) | 1937-12-06 | 1937-12-10 | Process for the preparation of synthetic tanning agents |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE689217C (en) |
-
1937
- 1937-12-10 DE DE1937G0096834 patent/DE689217C/en not_active Expired
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