GB157852A - Manufacture of tanning agents and process of tanning therewith - Google Patents

Manufacture of tanning agents and process of tanning therewith

Info

Publication number
GB157852A
GB157852A GB1578/21A GB157821A GB157852A GB 157852 A GB157852 A GB 157852A GB 1578/21 A GB1578/21 A GB 1578/21A GB 157821 A GB157821 A GB 157821A GB 157852 A GB157852 A GB 157852A
Authority
GB
United Kingdom
Prior art keywords
neutralized
sulphuric acid
tanning
tar
agents
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
GB1578/21A
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.)
CHEMISCHE FABRIKEN WORMS AG
Original Assignee
CHEMISCHE FABRIKEN WORMS AG
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 CHEMISCHE FABRIKEN WORMS AG filed Critical CHEMISCHE FABRIKEN WORMS AG
Publication of GB157852A publication Critical patent/GB157852A/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)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

Synthetic tanning-agents are prepared from tars or tar oils by coupling the components thereof by appropriate elements or radicals without isolation of the components from the tars or oils, and solubilizing the products by introducing acid groups before or after the coupling. According to examples:-a tar oil is heated with phosphorus peutoxide and concentrated sulphuric acid and the product neutralized or nearly neutralized with alkali; a tar oil is sulphonated by concentrated sulphuric acid and condensed with sulphur monochloride and the product nearly neutralized by caustic soda; a tar oil is sulphonated and condensed with formaldehyde and neutralized as described above; coal-tar is treated with concentrated sulphuric acid and the product nearly neutralized by caustic soda. Sulphuric acid may be replaced by chlorsulphonic acid &c. The products may be used in tanning, alone or mixed with other tanning-agents. Hides tanned with these materials may be dyed by treatment with diazo compounds.ALSO:Hides tanned with certain synthetic tanning agents may be dyed by treatment with diazo compounds. These tanning-agents are prepared from tars or tar oils by coupling the components thereof by appropriate elements or radicals without isolation of the components from the tars or oils, and solubilizing the products by introducing acid groups before or after the coupling. According to examples:-a tar oil is heated with phosphorus pentoxide and concentrated sulphuric acid and the product neutralized or nearly neutralized with alkali; a tar oil is sulphonated by concentrated sulphuric acid and condensed with sulphur monochloride and the product nearly neutralized by caustic soda; a tar oil is sulphonated and condensed with formaldehyde and neutralized as described above; coal-tar is treated with concentrated sulphuric acid and the product nearly neutralized by caustic soda. Sulphuric acid may be replaced by chlorsulphonic acid &c.
GB1578/21A 1916-05-31 1921-01-10 Manufacture of tanning agents and process of tanning therewith Expired GB157852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE157852X 1916-05-31

Publications (1)

Publication Number Publication Date
GB157852A true GB157852A (en) 1921-08-11

Family

ID=5679076

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1578/21A Expired GB157852A (en) 1916-05-31 1921-01-10 Manufacture of tanning agents and process of tanning therewith

Country Status (1)

Country Link
GB (1) GB157852A (en)

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