PURIFICATION METHODS OF ROSINS
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United States of America Patent
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Jun 18, 2020
app pub date -
Dec 12, 2019
filing date -
Dec 13, 2018
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Abstract
Presently described are methods for performing rosin purification. The methods described herein utilize a unique solvent precipitation process that surprisingly and unexpectedly reduces the color of rosin and the sulfur and unsaponifiable contents in the rosin. The described methods are also applicable to rosin derivatives such as rosin esters and amides. Utilizing this purified rosin as raw material, rosin derivatives with much improved characteristics (color, softening point and sulfur content) can be made that would otherwise be difficult to make.
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