Date of Award
12-2003
Degree Name
Master of Science
Department
Chemical and Paper Engineering
Department
Paper Engineering, Chemical Engineering and Imaging
First Advisor
Dr. John Cameron
Second Advisor
Dr. David Peterson
Third Advisor
Dr. Peter Parker
Access Setting
Masters Thesis-Open Access
Abstract
Borate autocausticizing can replace - total autocausticizing, or supplement the kraft lime cycle- partial autocausticizing. Partial autocausticizing is undergoing trials in several mills and has been recently commercialized in one mill. One common observation in the on-going trials is that the causticizing efficiency increases. The primary objectives of this research are to study the effect of metaborate on the causticizing rate, equilibrium and rate controlling parameters such as the temperature, concentration and sulfidity. The aim is to define the conditions that resulted in the increase of the causticizing efficiency.
The major findings of the research are that when the causticizing reaction is rate limited, which is true in commercial operations, partial borate autocausticizing can increase causticizing efficiency due to the higher initial hydroxide content, temperature is a critical factor and has to be monitored and maintained to achieve good causticizing efficiencies, and the effect of sulfidity on the causticizing reaction rate and equilibrium is less pronounced with the presence of borate in the system.
Recommended Citation
Anbalagan, Murugavel, "Effect of Partial Borate Autocausticizing on Causticizing Rate and Equilibrium" (2003). Masters Theses. 4956.
https://scholarworks.wmich.edu/masters_theses/4956