Deodorized rosin ester and methods for making
AssigneeKraton Polymers LLC
InventorsJason Tian, Ruidong Ding, Chad Reiter
Life of this patent
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Abstract
A process for deodorizing a rosin ester composition is disclosed. The process employs an adsorptive bed containing an adsorbent material. The adsorbent material comprises silica adsorbent having an average pore size between 50-200 Å, BET surface area of at least 300 m2/g, pore volume of 1.20 to 3.00 cc/g, and a silanol [Si—OH] level of 0.5 to 5 unit/nm2. The deodorized rosin ester composition has an odor intensity reduction of at least 1 unit on odor intensity scale of Offensive Odor Control Act as compared to the rosin ester feedstock. In embodiment, the deodorizing treatment comprises using multi-staged adsorbent system with an adsorbent column having multiple layers of different adsorbent materials.
Claims18
A process for deodorizing a rosin ester composition, the process comprising:
- providing a rosin ester feedstock in a liquid form by dissolving a solid rosin ester in a solvent, the rosin ester feedstock having a viscosity in a range of 5-150 cPs, an initial color, and an odor intensity;
- contacting the rosin ester feedstock with an adsorbent material in an adsorbent bed, obtaining a deodorized rosin ester composition;
- wherein the solvent is present in the rosin ester feedstock in an amount of at least 35 wt. % based on the total weight of the rosin ester feedstock;
- wherein the adsorbent bed is operated at an adsorption temperature of 20-30° C., and at one bar pressure;
- wherein the adsorbent material comprises silica adsorbent having an average pore size between 50-200 Å, BET surface area of at least 300 m2/g, pore volume of 1.20 to 3.00 cc/g, and a silanol [Si—OH] level of 0.5 to 5 unit/nm2;
- and
- wherein the deodorized rosin ester composition has an odor intensity reduction of at least 1 unit on odor intensity scale of Offensive Odor Control Act as compared to the rosin ester feedstock.
A process for deodorizing a rosin ester composition, the process comprising:
- providing a rosin ester feedstock in a liquid form by dissolving a solid rosin ester in a solvent, the rosin ester feedstock having a viscosity in a range of 5-150 cPs;
- contacting the rosin ester feedstock with two adsorbent beds in series, a first adsorbent bed containing a first adsorbent material and a second adsorbent bed containing a second adsorbent material, obtaining a deodorized rosin ester composition,
- wherein the first adsorbent material and the second adsorbent material are different,
- wherein at least one of the first adsorbent material and the second adsorbent material is a silica adsorbent having an average pore size between 50-200 Å, a BET surface area of at least 300 m2/g, pore volume of 1.20 to 3.00 cc/g, and a silanol [Si—OH] level of 0.5 to 5 unit/nm2;
- wherein the solvent is present in the rosin ester feedstock in an amount of at least 30 wt. % based on the total weight of the rosin ester feedstock;
- wherein at least one of the adsorbent beds is operated at an adsorption temperature of 20-30° C., and at one bar pressure;
- and
- wherein the deodorized rosin ester composition has an odor intensity reduction of at least 2 units on odor intensity scale of Offensive Odor Control Act as compared to the rosin ester feedstock.
Dependencies are inferred from the claim text.