GB305013A - Improvements relating to tanning substances - Google Patents
Improvements relating to tanning substancesInfo
- Publication number
- GB305013A GB305013A GB26206/28A GB2620628A GB305013A GB 305013 A GB305013 A GB 305013A GB 26206/28 A GB26206/28 A GB 26206/28A GB 2620628 A GB2620628 A GB 2620628A GB 305013 A GB305013 A GB 305013A
- Authority
- GB
- United Kingdom
- Prior art keywords
- formaldehyde
- urea
- sulphonated
- added
- phenol
- 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
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)
Abstract
305,013. Geigy Soc. Anon., J. R. Jan. 28, 1928, [Convention date]. Sulphonated phenols-urea-formaldehyde condensation products are produced by sulphonating the phenol and then adding urea or a substance yielding urea, and formaldehyde or a medium which generates formaldehyde, or adding to the sulphonated phenol the condensation product of urea and formaldehyde. In examples, (1) phenol, cresol, or resorcinol is sulphonated and the solution is diluted and cooled to 25‹ C.; urea and then formaldehyde are added and the mixture is heated to 80‹-95‹ C., after which soda lye is added until a water-soluble product is obtained; (2) cresol is sulphonated with an equal quantity of sulphuric acid, and a solution obtained by boiling calcium cyanamide with water precipitating the calcium with sulphuric acid, filtering, and concentrating, is added, the reaction mixture not being allowed to exceed 40‹ C.; formaldehyde is added and the mixture is heated to 80‹-95‹ C.; (3) salicylic acid is sulphonated, diluted, and cooled to 40‹-50‹ C.; the crystal paste is separated and treated with urea and formaldehyde and heated to 110‹-120‹ C.; (5) phenol or cresol is sulphonated, diluted, and cooled at 30‹ C., formaldehyde is added carefully by drops, the temperature not being allowed to exceed 30‹ C. ; more water is added, followed by the pulverized condensation product obtained from urea and formaldehyde in presence of sulphuric acid, and the reaction mixture is heated to 85‹-90‹ C. The products are alkali soluble and useful as tanning agents and for weighting silk.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE305013X | 1928-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB305013A true GB305013A (en) | 1929-09-26 |
Family
ID=6120653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26206/28A Expired GB305013A (en) | 1928-01-28 | 1928-09-12 | Improvements relating to tanning substances |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB305013A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018212651A1 (en) * | 2017-05-17 | 2018-11-22 | Stahl International B.V. | Tanning agent for leather production comprising a condensation poly mer of sulfonated phenol, urea, and formaldehyde |
-
1928
- 1928-09-12 GB GB26206/28A patent/GB305013A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018212651A1 (en) * | 2017-05-17 | 2018-11-22 | Stahl International B.V. | Tanning agent for leather production comprising a condensation poly mer of sulfonated phenol, urea, and formaldehyde |
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