GB235548A - A process for the recovery of chromium as chromate from chromiferous waste materials resulting from the leather industry - Google Patents

A process for the recovery of chromium as chromate from chromiferous waste materials resulting from the leather industry

Info

Publication number
GB235548A
GB235548A GB1373625A GB1373625A GB235548A GB 235548 A GB235548 A GB 235548A GB 1373625 A GB1373625 A GB 1373625A GB 1373625 A GB1373625 A GB 1373625A GB 235548 A GB235548 A GB 235548A
Authority
GB
United Kingdom
Prior art keywords
chromate
sodium
sulphate
chromium
treated
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
GB1373625A
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.)
Mayer & Sohn J
Original Assignee
Mayer & Sohn J
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 Mayer & Sohn J filed Critical Mayer & Sohn J
Priority to GB1373625A priority Critical patent/GB235548A/en
Publication of GB235548A publication Critical patent/GB235548A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G37/00—Compounds of chromium
    • C01G37/14—Chromates; Bichromates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

Waste chrome leather is subjected to an oxidizing treatment to convert the chromium to the hexavalent form preferably by heating with barium peroxide in an autoclave. The barium chromate and sulphate are separated from the glue liquor and treated with sodium bisulphate or sulphate or with sodium sulphate and sulphuric or hydrochloric acid whereby sodium chromate is obtained. Waste chrome tanning liquor is treated with barium chloride or hydrate or a lead or strontium salt to obtain an insoluble chromate which is separated and treated with sodium bisulphate or with sodium sulphate and sulphuric acid to obtain sodium chromate. Specifications 12834/84 and 5676/11, [Class 76, Leather], are referred to. The Specification as open to inspection under Sect. 91 (3) (a) includes the treatment of chrome residues from other industries such as the colour industry. This subject-matter does not appear in the Specification as accepted.
GB1373625A 1925-05-26 1925-05-26 A process for the recovery of chromium as chromate from chromiferous waste materials resulting from the leather industry Expired GB235548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1373625A GB235548A (en) 1925-05-26 1925-05-26 A process for the recovery of chromium as chromate from chromiferous waste materials resulting from the leather industry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1373625A GB235548A (en) 1925-05-26 1925-05-26 A process for the recovery of chromium as chromate from chromiferous waste materials resulting from the leather industry

Publications (1)

Publication Number Publication Date
GB235548A true GB235548A (en) 1926-04-22

Family

ID=10028421

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1373625A Expired GB235548A (en) 1925-05-26 1925-05-26 A process for the recovery of chromium as chromate from chromiferous waste materials resulting from the leather industry

Country Status (1)

Country Link
GB (1) GB235548A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6901002A (en) * 1968-01-30 1969-08-01
FR2358467A1 (en) * 1976-07-12 1978-02-10 Cunningham John Chromium recovery from waste water - by treatment with barium carbonate and acetic acid
US5204073A (en) * 1991-04-29 1993-04-20 Guangzhou Zhufeng Institute Toxicity elimination and comprehensive utilization of chrome residues

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6901002A (en) * 1968-01-30 1969-08-01
FR2358467A1 (en) * 1976-07-12 1978-02-10 Cunningham John Chromium recovery from waste water - by treatment with barium carbonate and acetic acid
US5204073A (en) * 1991-04-29 1993-04-20 Guangzhou Zhufeng Institute Toxicity elimination and comprehensive utilization of chrome residues

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