GB620679A - Tanning agents and method for preparing same - Google Patents

Tanning agents and method for preparing same

Info

Publication number
GB620679A
GB620679A GB12299/46A GB1229946A GB620679A GB 620679 A GB620679 A GB 620679A GB 12299/46 A GB12299/46 A GB 12299/46A GB 1229946 A GB1229946 A GB 1229946A GB 620679 A GB620679 A GB 620679A
Authority
GB
United Kingdom
Prior art keywords
resin
phenol
sulphonation
tanning agents
preparing same
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
Application number
GB12299/46A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Progil SARL
Original Assignee
Progil SARL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Progil SARL filed Critical Progil SARL
Publication of GB620679A publication Critical patent/GB620679A/en
Expired legal-status Critical Current

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)
  • Phenolic Resins Or Amino Resins (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

Tanning agents are prepared by the sulphonation in vacuo of a phenol-formaldehyde-type resin with an amount of acid less than that required for the complete sulphonation of the phenol &c. in the resin, but sufficient to ensure that the resin is rendered completely soluble in water, the pH of the product being then brought to 3-4, e.g. by complete neutralization with ammonia or p soda, followed by the addition of an organic acid. Urea may be added to the resin in its preparation. Sulphonation may be effected below 100 DEG C., e.g. at 70-75 DEG C. Examples relate to the preparation of phenol-and cresol-formaldehyde resins.
GB12299/46A 1943-08-18 1946-04-23 Tanning agents and method for preparing same Expired GB620679A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR456608 1943-08-18
FR620679X 1943-08-18
FR620839X 1945-02-28

Publications (1)

Publication Number Publication Date
GB620679A true GB620679A (en) 1949-03-29

Family

ID=62519372

Family Applications (2)

Application Number Title Priority Date Filing Date
GB12299/46A Expired GB620679A (en) 1943-08-18 1946-04-23 Tanning agents and method for preparing same
GB12690/46A Expired GB620839A (en) 1943-08-18 1946-04-26 Tanning product and method for obtaining same

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB12690/46A Expired GB620839A (en) 1943-08-18 1946-04-26 Tanning product and method for obtaining same

Country Status (2)

Country Link
BE (1) BE456608A (en)
GB (2) GB620679A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663698A (en) * 1950-04-11 1953-12-22 Monsanto Chemicals Process for producing synthetic tannins by dehydrating and sulfonating a novolak resin in a vacuum

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2834794C2 (en) * 1978-08-09 1983-06-01 Schaum-Chemie W. Bauer GmbH & Co KG, 4300 Essen Process for the production of a foamed plastic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663698A (en) * 1950-04-11 1953-12-22 Monsanto Chemicals Process for producing synthetic tannins by dehydrating and sulfonating a novolak resin in a vacuum

Also Published As

Publication number Publication date
BE456608A (en) 1944-08-31
GB620839A (en) 1949-03-31

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