GB146166A - Improvements relating to the manufacture of tanning agents - Google Patents

Improvements relating to the manufacture of tanning agents

Info

Publication number
GB146166A
GB146166A GB17294/20A GB1729420A GB146166A GB 146166 A GB146166 A GB 146166A GB 17294/20 A GB17294/20 A GB 17294/20A GB 1729420 A GB1729420 A GB 1729420A GB 146166 A GB146166 A GB 146166A
Authority
GB
United Kingdom
Prior art keywords
tanning
added
sulphuric acid
product
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
GB17294/20A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB146166A publication Critical patent/GB146166A/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
    • 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
    • C14C3/22—Chemical tanning by organic agents using polymerisation products

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

Tanning-agents are prepared by heating cyclic hydrocarbons to a temperature below 100 DEG C. with excess of sulphuric acid to obtain a sulphonated condensation product of resinous character; agents which either enter into or promote condensation, such as formaldehyde, ketones, phosphoryl chloride, or thionyl chloride, may be added. According to examples, crude naphthalene or anthracene oil are heated on the water-bath with sulphuric acid until sulphonated, a little formaldehyde is then added, and the heating continued until the product solidifies to a resinous mass soluble in water. The free sulphuric acid in the product may be neutralized by an alkali or other base, and excess of alkali may be added to convert the condensed sulphonic acid into sulphonate. The products may be used in tanning, either alone or in admixture with vegetable tanning-extracts; the vegetable extracts are solubilized and decolorized by this admixture. Specification 7137/13 is referred to. Reference has been directed by the Comptroller to Specifications 19502/90, 10321/93, 10322/93, 10323/93, 4648/11, 7137/13, and 7138/13, also to 18259/13, 144,657, and 144,677, [all in Class 76, Leather].
GB17294/20A 1914-02-16 1920-06-25 Improvements relating to the manufacture of tanning agents Expired GB146166A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE146166X 1914-02-16
DE146180X 1914-02-28

Publications (1)

Publication Number Publication Date
GB146166A true GB146166A (en) 1921-11-25

Family

ID=62520116

Family Applications (2)

Application Number Title Priority Date Filing Date
GB17341/20A Expired GB146180A (en) 1914-02-16 1920-06-25 Improvements in the manufacture of tanning agents
GB17294/20A Expired GB146166A (en) 1914-02-16 1920-06-25 Improvements relating to the manufacture of tanning agents

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB17341/20A Expired GB146180A (en) 1914-02-16 1920-06-25 Improvements in the manufacture of tanning agents

Country Status (1)

Country Link
GB (2) GB146180A (en)

Also Published As

Publication number Publication date
GB146180A (en) 1921-11-25

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