Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Process for obtaining nitric acid of a concentration higher than the azeotropic concentration by means of the absorption of nitrogen oxides in water or diluted nitric acid










Image Number 2 for United States Patent #4064221.

The present invention relates to a process for obtaining nitric acid of a concentration higher than the azeotropic concentration by means of the absorption of nitrogen oxides in water or diluted nitric acid and the partial pressure of the nitrogen oxides before absorption is raised partly by compression of the gases that contain the nitrous gases and partly by means of a cycle of diluted nitric acid which is decomposed by the action of the NO contained in the gases, enriching them in NO.sub.2 and which subsequently reform by absorption of NO.sub.2 in water when the partial pressure of the nitrogen oxides is low.








 
 
  Recently Added Patents
Piezoelectric ultrasonic transducer apparatus
Fan guide
Organic semiconductor compound, semiconductor device, solar cell and producing method of organic semiconductor compound
Implant free extremely thin semiconductor devices
Cylindrical LED fixture
Method and system for automatic 3-D image creation
Data encoding and decoding apparatus and method thereof for verifying data integrity
  Randomly Featured Patents
Rock drill feed mechanism
Mooring terminal
Synthesis of d-2-amino-1-butanol
Systems and methods for packaging, distributing and managing assets in digital cable systems
Zero pin serial interface
Semiconductor devices and manufacturing methods thereof
Paper bundling device
Paint metering tray for roller applications
Image-forming device having a positioning structure
Active shape model for vehicle modeling and re-identification