After several refinements, this method, called the lead chamber process or " chamber process ", remained the standard for sulfuric acid production for almost two centuries.
12.
After several refinements, this method, called the lead chamber process or " chamber process ", remained the standard for sulfuric acid production for almost two centuries.
13.
In addition to being a far more economical process for producing concentrated sulfuric acid than the previous lead chamber process, the contact process also produces sulfur trioxide and oleum.
14.
With the development of the lead chamber process in 1746 and the Leblanc process, allowing large-scale production of sulfuric acid and sodium carbonate, respectively, chemical reactions became implemented into the industry.
15.
The lead chamber process for sulfuric acid production was abandoned partly because it could not produce sulfur trioxide or concentrated sulfuric acid directly due to corrosion of the lead, and absorption of NO 2 gas.
16.
"Chamber acid " and " tower acid " were the two concentrations of sulfuric acid produced by the lead chamber process, chamber acid being the acid produced in lead chamber itself ( < 70 % to avoid contamination with nitrosylsulfuric acid ) and tower acid being the acid recovered from the bottom of the Glover tower.
17.
These customers rely on KLA-Tencor s inline wafer and IC defect monitoring, review and classification; reticle defect inspection and metrology; packaging and interconnect inspection; critical dimension ( CD ) metrology; pattern overlay metrology; film thickness, surface topography and composition measurements; measurement of in-chamber process conditions, wafer shape and stress metrology; computational lithography tools and overall yield and fab-wide data management and analysis systems.
