Methods of Making Rosin Esters
AssigneeArizona Chemical Company
InventorsPaul A. Williams, Lloyd A. Nelson, Rachel C. Severance
Life of this patent
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Abstract
Provided herein are methods of making rosin esters. The methods can involve contacting a rosin ester with a microporous adsorbent. Treatment with a microporous adsorbent, such as an activated carbon, can improve the color of the rosin ester (e.g., reduce the neat Gardner color of the rosin ester by at least 1 Gardner color unit), reduce the concentration of sulfur in the rosin ester (e.g., reduce the concentration of sulfur in the rosin ester by at least 50 ppm), or combinations thereof. Rosin esters prepared by the methods described herein, as well as methods of using thereof, are also described.
Claims76
A method of making a rosin ester comprising
- (a) esterifying a rosin with an alcohol to form a rosin ester;
- and
- (b) flowing the rosin ester through a microporous adsorbent having a surface area of from 500 m2/g to 2000 m2/g.
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A method of making a rosin ester comprising
- (a) esterifying a rosin with an alcohol to form a rosin ester;
- and
- (b) contacting the rosin ester with a microporous adsorbent having a surface area of from 500 m2/g to 2000 m2/g, a volume of micropores ranging from 0.05 mL/g to 0.4 mL/g, a volume of mesopores ranging from 0.1 mL/g to 1.25 mL/g, and a volume of macropores ranging from 0.1 mL/g to 0.7 mL/g.
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A method of making a rosin ester comprising
- (a) esterifying a rosin with an alcohol to form a rosin ester;
- and
- (b) flowing the rosin ester through a stationary phase comprising an activated carbon.
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Dependencies are inferred from the claim text.