Formation regulation of various rosin esters and intensification mechanism using pressurized CO 2
The esterification of rosin with pentaerythritol (PE) was studied, using pressurized CO 2 as an intensified additive to high-temperature water (HTW), which formed the various esters with different soften points to meet industrial applications. A multiple linear regression model was established to de...
| Main Authors: | , , , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
Taylor & Francis
2020
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.6084/m9.figshare.13169540 https://tandf.figshare.com/articles/online_resource/Formation_regulation_of_various_rosin_esters_and_intensification_mechanism_using_pressurized_CO_sub_2_sub_/13169540 |
| Summary: | The esterification of rosin with pentaerythritol (PE) was studied, using pressurized CO 2 as an intensified additive to high-temperature water (HTW), which formed the various esters with different soften points to meet industrial applications. A multiple linear regression model was established to determine the dependence of independent variables (CO 2 pressure, temperature, PE-to-rosin mass ratio and reaction time) on rosin conversion, where the elasticity of the logarithm of CO 2 pressure was 0.13, indicating pressurized CO 2 -HTW can effectively enhance this esterification. The conversion of rosin could be improved either by increasing the PE-to-rosin mass ratio or the reaction time, but products were monoester and triesters, respectively, thus the process regulation for the formation of various esters can be achieved through operating conditions. A corresponding stepwise esterification was proposed. Furthermore, the catalytic mechanism of pressurized CO 2 -HWT for this esterification were identified to be the acid catalysis of carbonic acid and the enhancemennt of CO 2 . |
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