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HUT60169A - Method for dechroming chromed scrap leather and agricultural utilizing its protein content and reutilizing the chromed sludge - Google Patents

Method for dechroming chromed scrap leather and agricultural utilizing its protein content and reutilizing the chromed sludge

Info

Publication number
HUT60169A
HUT60169A HU716990A HU716990A HUT60169A HU T60169 A HUT60169 A HU T60169A HU 716990 A HU716990 A HU 716990A HU 716990 A HU716990 A HU 716990A HU T60169 A HUT60169 A HU T60169A
Authority
HU
Hungary
Prior art keywords
chromium
chromed
sludge
dechroming
reutilizing
Prior art date
Application number
HU716990A
Other languages
Hungarian (hu)
Other versions
HU907169D0 (en
Inventor
Janos Csapo
Original Assignee
Nagy Lajos
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 Nagy Lajos filed Critical Nagy Lajos
Priority to HU716990A priority Critical patent/HUT60169A/en
Publication of HU907169D0 publication Critical patent/HU907169D0/en
Publication of HUT60169A publication Critical patent/HUT60169A/en

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  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Chromium is removed from chromium tanned leather-waste enabling sepd. proteins to be used in agriculture and to reuse chromium from residual chromium sludges. Covered or open leather waste is boiled respectively with 2.0 and 0.5 M sodium or potassium hydroxide. The boiled mixt. is filtered, the filtrate contains sepd. proteins, free even from traces of chromium. Depending whether potassium or sodium hydroxide is used the protein extract finds application in animal fodder or in plant growing. Alkali pretreated protein extracts are neutralised by hydrochloric or sulphuric acid to required pH values. Chromium sludge retained in filters is reintroduced into the tannings process or is dewatered and dried for storage
HU716990A 1990-11-16 1990-11-16 Method for dechroming chromed scrap leather and agricultural utilizing its protein content and reutilizing the chromed sludge HUT60169A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
HU716990A HUT60169A (en) 1990-11-16 1990-11-16 Method for dechroming chromed scrap leather and agricultural utilizing its protein content and reutilizing the chromed sludge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU716990A HUT60169A (en) 1990-11-16 1990-11-16 Method for dechroming chromed scrap leather and agricultural utilizing its protein content and reutilizing the chromed sludge

Publications (2)

Publication Number Publication Date
HU907169D0 HU907169D0 (en) 1991-05-28
HUT60169A true HUT60169A (en) 1992-08-28

Family

ID=10972213

Family Applications (1)

Application Number Title Priority Date Filing Date
HU716990A HUT60169A (en) 1990-11-16 1990-11-16 Method for dechroming chromed scrap leather and agricultural utilizing its protein content and reutilizing the chromed sludge

Country Status (1)

Country Link
HU (1) HUT60169A (en)

Also Published As

Publication number Publication date
HU907169D0 (en) 1991-05-28

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Legal Events

Date Code Title Description
DFC9 Refusal of application