Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method for treating iron in a silver recovery process










Image Number 2 for United States Patent #8114189.

A method of reducing or preventing the amount of iron sludge or precipitate that forms as a result of the recovery of silver from chemical solutions, such as a standard photographic solution. The method generally involves the introduction of a source of a conjugate organic base, such as a weak organic acid like citric acid or a salt of the conjugate organic base like a citrate salt, to the chemical fluid either before or during the silver recovery process. Preferably the source of conjugate organic base is introduced by combining it with a binder to form a time release cake or placing it in a container that has a semipermeable membrane that maintains the concentration of the conjugate organic base in the chemical fluid from about 0.2 to about 78 milimolar over a period of time.








 
 
  Recently Added Patents
Method and system for physical verification using network segment current
Terminal and method of controlling the same
Dynamic association and disassociation of threads to device functions based on requestor identification
Location-based method to specify ratio frequency spectrum rights
Snap-engagement structure
Family of pain producing substances and methods to produce novel analgesic drugs
System and method for wireless messaging in a wireless communication system
  Randomly Featured Patents
Wind shielding dome
Spacer like floating gate formation
Cell scraper
Lubricant and fuel compositions containing reaction products of polyalkenyl succinimides, aldehydes, and triazoles
Method for manufacturing semiconductor device
Diaphragm clutch cover with stop lugs capable of distinguishing between different cover types
Burner device, especially for a brazier or the like
Circuit arrangement for monitoring interruptions in two closed-circuit loops
Movement detection apparatus for detecting movement vectors from an image signal
Color chip holder