A versatile apparatus for the bench scale bleaching and deodorsation of vegetable oils
A versatile isothermal glass apparatus provided with sintered glass on the bottom was designed for the bench scale adsorptive bleaching and deodorisation of vegetable oils. The stream of argon bubbles agitated the sample in both cases and protected the vegetable oil effectively against undesirable a...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Czech Academy of Agricultural Sciences
2015-12-01
|
| Series: | Czech Journal of Food Sciences |
| Subjects: | |
| Online Access: | https://cjfs.agriculturejournals.cz/artkey/cjf-201506-0009_a-versatile-apparatus-for-the-bench-scale-bleaching-and-deodorsation-of-vegetable-oils.php |
| _version_ | 1797899716343627776 |
|---|---|
| author | Vladimir Filip Jan Kyselka Iveta Hrádková Markéta Berčíková Klára Cihelková |
| author_facet | Vladimir Filip Jan Kyselka Iveta Hrádková Markéta Berčíková Klára Cihelková |
| author_sort | Vladimir Filip |
| collection | DOAJ |
| description | A versatile isothermal glass apparatus provided with sintered glass on the bottom was designed for the bench scale adsorptive bleaching and deodorisation of vegetable oils. The stream of argon bubbles agitated the sample in both cases and protected the vegetable oil effectively against undesirable autoxidation and photooxygenation changes. However, a variable concentration of hexanal (27-30 μmol/kg) was always present in half-refined oils due to the heterolytic fragmentation of alkyl hydroperoxides. The colour on the Lovibond scale and the content of phosphorus (< 5 mg/kg) were efficiently decreased during the laboratory bleaching of rapeseed oil. It was found out that the adapted glass apparatus connected with a vacuum pump (1 hPa, a stream of argon gas instead of stripping steam) was able to reduce the content of carbonyl compounds below detectable concentration at 220-240°C. Furthermore, the extent of minor geometrical and positional isomerisation reactions was negligible (0.035-0.130 wt%). The results of the bench scale bleaching and deodorisation experiments were completely comparable with the industrial equipment under reduced pressure of the air. |
| first_indexed | 2024-04-10T08:33:16Z |
| format | Article |
| id | doaj.art-f658038d58a3451bb636b2841985ac42 |
| institution | Directory Open Access Journal |
| issn | 1212-1800 1805-9317 |
| language | English |
| last_indexed | 2024-04-10T08:33:16Z |
| publishDate | 2015-12-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Czech Journal of Food Sciences |
| spelling | doaj.art-f658038d58a3451bb636b2841985ac422023-02-23T03:28:14ZengCzech Academy of Agricultural SciencesCzech Journal of Food Sciences1212-18001805-93172015-12-0133653754410.17221/438/2015-CJFScjf-201506-0009A versatile apparatus for the bench scale bleaching and deodorsation of vegetable oilsVladimir Filip0Jan Kyselka1Iveta Hrádková2Markéta Berčíková3Klára Cihelková4Department of Dairy, Fat and Cosmetics, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Prague, Czech RepublicDepartment of Dairy, Fat and Cosmetics, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Prague, Czech RepublicDepartment of Dairy, Fat and Cosmetics, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Prague, Czech RepublicDepartment of Dairy, Fat and Cosmetics, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Prague, Czech RepublicDepartment of Dairy, Fat and Cosmetics, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Prague, Czech RepublicA versatile isothermal glass apparatus provided with sintered glass on the bottom was designed for the bench scale adsorptive bleaching and deodorisation of vegetable oils. The stream of argon bubbles agitated the sample in both cases and protected the vegetable oil effectively against undesirable autoxidation and photooxygenation changes. However, a variable concentration of hexanal (27-30 μmol/kg) was always present in half-refined oils due to the heterolytic fragmentation of alkyl hydroperoxides. The colour on the Lovibond scale and the content of phosphorus (< 5 mg/kg) were efficiently decreased during the laboratory bleaching of rapeseed oil. It was found out that the adapted glass apparatus connected with a vacuum pump (1 hPa, a stream of argon gas instead of stripping steam) was able to reduce the content of carbonyl compounds below detectable concentration at 220-240°C. Furthermore, the extent of minor geometrical and positional isomerisation reactions was negligible (0.035-0.130 wt%). The results of the bench scale bleaching and deodorisation experiments were completely comparable with the industrial equipment under reduced pressure of the air.https://cjfs.agriculturejournals.cz/artkey/cjf-201506-0009_a-versatile-apparatus-for-the-bench-scale-bleaching-and-deodorsation-of-vegetable-oils.phphexanalalkyl hydroperoxidesheterolytic cleavagerapeseed oilbleaching |
| spellingShingle | Vladimir Filip Jan Kyselka Iveta Hrádková Markéta Berčíková Klára Cihelková A versatile apparatus for the bench scale bleaching and deodorsation of vegetable oils Czech Journal of Food Sciences hexanal alkyl hydroperoxides heterolytic cleavage rapeseed oil bleaching |
| title | A versatile apparatus for the bench scale bleaching and deodorsation of vegetable oils |
| title_full | A versatile apparatus for the bench scale bleaching and deodorsation of vegetable oils |
| title_fullStr | A versatile apparatus for the bench scale bleaching and deodorsation of vegetable oils |
| title_full_unstemmed | A versatile apparatus for the bench scale bleaching and deodorsation of vegetable oils |
| title_short | A versatile apparatus for the bench scale bleaching and deodorsation of vegetable oils |
| title_sort | versatile apparatus for the bench scale bleaching and deodorsation of vegetable oils |
| topic | hexanal alkyl hydroperoxides heterolytic cleavage rapeseed oil bleaching |
| url | https://cjfs.agriculturejournals.cz/artkey/cjf-201506-0009_a-versatile-apparatus-for-the-bench-scale-bleaching-and-deodorsation-of-vegetable-oils.php |
| work_keys_str_mv | AT vladimirfilip aversatileapparatusforthebenchscalebleachinganddeodorsationofvegetableoils AT jankyselka aversatileapparatusforthebenchscalebleachinganddeodorsationofvegetableoils AT ivetahradkova aversatileapparatusforthebenchscalebleachinganddeodorsationofvegetableoils AT marketabercikova aversatileapparatusforthebenchscalebleachinganddeodorsationofvegetableoils AT klaracihelkova aversatileapparatusforthebenchscalebleachinganddeodorsationofvegetableoils AT vladimirfilip versatileapparatusforthebenchscalebleachinganddeodorsationofvegetableoils AT jankyselka versatileapparatusforthebenchscalebleachinganddeodorsationofvegetableoils AT ivetahradkova versatileapparatusforthebenchscalebleachinganddeodorsationofvegetableoils AT marketabercikova versatileapparatusforthebenchscalebleachinganddeodorsationofvegetableoils AT klaracihelkova versatileapparatusforthebenchscalebleachinganddeodorsationofvegetableoils |