GB220025A - Improvements in the process of tanning and in the manufacture of tanning substances - Google Patents

Improvements in the process of tanning and in the manufacture of tanning substances

Info

Publication number
GB220025A
GB220025A GB1143723A GB1143723A GB220025A GB 220025 A GB220025 A GB 220025A GB 1143723 A GB1143723 A GB 1143723A GB 1143723 A GB1143723 A GB 1143723A GB 220025 A GB220025 A GB 220025A
Authority
GB
United Kingdom
Prior art keywords
liquor
chloride
lignine
waste
esterification
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
GB1143723A
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
Priority to GB1143723A priority Critical patent/GB220025A/en
Publication of GB220025A publication Critical patent/GB220025A/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
    • C14C3/24—Chemical tanning by organic agents using lignin derivatives, e.g. sulfate liquor

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

Artificial tanning agents are prepared by the partial or complete esterification of waste sulphite cellulose liquor using two or more esterifying agents. Instead of waste sulphite cellulose, liquor may be employed, the fermented liquor or the sulphite mash from the manufacture of alcohol from the waste liquor, or the lignine sulphonic acids may first be isolated prior to esterification. In a further modification, lignine itself may be esterified and then sulphonated. When other starting materials than waste sulphite cellulose liquor are employed, simple esterification products may also be formed by the process of the parent Specification. According to the examples, (1) waste sulphite cellulose liquor is heated with toluene sulpho-chloride and acetyl chloride in the presence of caustic soda, (2) lignine sulphonic acid is precipitated from waste sulphite cellulose liquor by adding sodium sulphate and subjected to esterification with a mixture of toluene sulpho-chloride and acetyl chloride, (3) straw is treated with sodium carbonate to extract the lignine which is esterified with toluene sulpho-chloride and the product then sulphonated, (4) lignine is dissolved in cold caustic soda, esterified by heating with toluene sulpho-chloride and concentrated sulphuric acid then added.
GB1143723A 1923-04-27 1923-04-27 Improvements in the process of tanning and in the manufacture of tanning substances Expired GB220025A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1143723A GB220025A (en) 1923-04-27 1923-04-27 Improvements in the process of tanning and in the manufacture of tanning substances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1143723A GB220025A (en) 1923-04-27 1923-04-27 Improvements in the process of tanning and in the manufacture of tanning substances

Publications (1)

Publication Number Publication Date
GB220025A true GB220025A (en) 1924-07-28

Family

ID=9986233

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1143723A Expired GB220025A (en) 1923-04-27 1923-04-27 Improvements in the process of tanning and in the manufacture of tanning substances

Country Status (1)

Country Link
GB (1) GB220025A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419783A (en) * 1944-01-31 1947-04-29 Quaker Chemical Products Corp Ester derivatives of lignin sulphonates
US3163633A (en) * 1961-01-25 1964-12-29 Azoplate Corp Method for the manufacture of polyfunctional diazonium halides
US3277074A (en) * 1961-01-25 1966-10-04 Azoplate Corp Method for the preparation of polyfunctional diazonium halides

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419783A (en) * 1944-01-31 1947-04-29 Quaker Chemical Products Corp Ester derivatives of lignin sulphonates
US3163633A (en) * 1961-01-25 1964-12-29 Azoplate Corp Method for the manufacture of polyfunctional diazonium halides
US3277074A (en) * 1961-01-25 1966-10-04 Azoplate Corp Method for the preparation of polyfunctional diazonium halides

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