Resources Contact Us Home
Treating foul refinery waste waters with absorber gas

Image Number 2 for United States Patent #3984316.

Refinery waste waters containing dissolved hydrogen sulfide and ammonia are stripped of hydrogen sulfide by a countercurrent stream of refinery absorber gas which removes substantially all of the hydrogen sulfide and none of the ammonia. The dissolved ammonia is subsequently removed by steam stripping, leaving a waste water sufficiently clean to be non-polluting.

  Recently Added Patents
Human and mouse targeting peptides identified by phage display
Systems and methods for analyzing telecommunications invoices for payment
Apparatus for providing location information of hand-held device and method thereof
Compact light shield for flash photography
Reoccuring keying system
Interface circuit
Method and system for efficient DRX operation during handover in LTE
  Randomly Featured Patents
Programmable manipulator with dynamic feedback apparatus for stabilization
Polyether polyamino methylene phosphonate N-oxides for high pH scale control
Method for enabling collaborative document markup between participants
Aircraft engine combustion liner cooling apparatus
Stroller blanket
Motorcycle, toy, or motorcycle replica
Paging transceivers and methods for selectively retrieving messages
Communication apparatus and method for discriminating confidentiality of received data
Non-aqueous electrolyte secondary battery with a positive active material comprising primary particles and secondary particles made of the primary particles
N- (2-aminophenyl) benzamide derivative having urea structure