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FR2230727A1 - Pickling leather for chromium tanning - with phosphoric acid, resulting in improved chromium uptake - Google Patents

Pickling leather for chromium tanning - with phosphoric acid, resulting in improved chromium uptake

Info

Publication number
FR2230727A1
FR2230727A1 FR7417967A FR7417967A FR2230727A1 FR 2230727 A1 FR2230727 A1 FR 2230727A1 FR 7417967 A FR7417967 A FR 7417967A FR 7417967 A FR7417967 A FR 7417967A FR 2230727 A1 FR2230727 A1 FR 2230727A1
Authority
FR
France
Prior art keywords
chromium
acid
pickling
tanning
resulting
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.)
Granted
Application number
FR7417967A
Other languages
French (fr)
Other versions
FR2230727B1 (en
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.)
Solvay Solutions UK Ltd
Original Assignee
Albright and Wilson Ltd
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 Albright and Wilson Ltd filed Critical Albright and Wilson Ltd
Publication of FR2230727A1 publication Critical patent/FR2230727A1/en
Application granted granted Critical
Publication of FR2230727B1 publication Critical patent/FR2230727B1/fr
Granted 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
    • C14C1/00—Chemical treatment prior to tanning
    • C14C1/08—Deliming; Bating; Pickling; Degreasing

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

H3PO4 opt. mixed with another inorg. acid, pref. H2SO4, is used as acid in tanning leather, e.g. of ox, horse, pig, sheep, goat or calf, by pickling a limed, unhaired hide in an aq. soln. of an acid, followed by Cr-tanning. Pref. acid concn. in pickling step is 0.1-7 (1.5-3) wt. %/wt. hide. Wt. of H3PO4 refers to aq. soln. having specific wt. 1.75. Wt. of other acids refers to 100% concn. Wt. ratio H3PO4 : other acid is 1 : 10 to 10 : 1 (1 : 4 to 5 : 1) esp. 1 : 3 to 3 : 1. Tanned prods. having smoother grain can be obtd. by adding 4-8 wt. % inorg. salt, esp. NaCl, to pickling fluid.
FR7417967A 1973-05-23 1974-05-22 Pickling leather for chromium tanning - with phosphoric acid, resulting in improved chromium uptake Granted FR2230727A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2471273 1973-05-23

Publications (2)

Publication Number Publication Date
FR2230727A1 true FR2230727A1 (en) 1974-12-20
FR2230727B1 FR2230727B1 (en) 1977-10-14

Family

ID=10216057

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7417967A Granted FR2230727A1 (en) 1973-05-23 1974-05-22 Pickling leather for chromium tanning - with phosphoric acid, resulting in improved chromium uptake

Country Status (5)

Country Link
AR (1) AR199041A1 (en)
DE (1) DE2424959A1 (en)
FR (1) FR2230727A1 (en)
IN (1) IN141260B (en)
ZA (1) ZA743214B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE673163C (en) * 1936-04-01 1939-03-16 Chem Fab Joh A Benckiser G M B Process for de-liming ashed hides and skins

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE673163C (en) * 1936-04-01 1939-03-16 Chem Fab Joh A Benckiser G M B Process for de-liming ashed hides and skins

Also Published As

Publication number Publication date
DE2424959A1 (en) 1974-12-19
IN141260B (en) 1977-02-05
ZA743214B (en) 1975-05-28
FR2230727B1 (en) 1977-10-14
AR199041A1 (en) 1974-07-31
AU6921174A (en) 1975-11-27

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Legal Events

Date Code Title Description
ST Notification of lapse