Waste Fatty Acid Addition to Black Liquor to Decrease Tall Oil Soap Solubility and Increase Skimming Efficiency in Kraft Mills Pulping Mountain Pine Beetle-infested Wood
Author: Victor Charles Uloth
Publisher:
Published: 2009
Total Pages: 34
ISBN-13:
DOWNLOAD EBOOKKraft pulping of softwoods converts the free resin and fatty acids and a large percentage of the triglycerides in wood into their sodium salts or soaps. The recovered soap is either burnt in the recovery boiler or converted into a blend of fatty and resin acids and neutrals, known as crude tall oil, through acidulation in a tall oil plant. Recent soap solubility tests and black liquor analyses, using black liquor and soap samples from four BC mills and one Alberta mill pulping very little beetle-killed wood, indicate that tall oil production at mills pulping mountain pine beetle-infested wood could drop substantially due to higher soap solubility in black liquor, a reduced tendency for the soap to "float" off in storage tanks and skimmers, and lower soap acid numbers. This document reports on the investigation of a means to economically increase soap recovery by increasing the fatty acid/resin acid ratio of the product tall oil.--Includes text from document.