Raw halloysite as reusable heterogeneous catalyst for esterification of lauric acid
Source abstract
Abstract
AbstractThe methylic and ethylic esterifications of lauric acid were investigated using raw halloysite as a catalyst, in heterogeneous media. The reactions were conducted with different molar ratios (alcohol:lauric acid) and proportions of catalyst, at 160°C for 2h in a pressurized steel reactor. Halloysite produced lauric acid conversion of 95.02% and 87.11% for the methylic and ethylic esterifications, respectively. These results were better than those obtained from thermal conversion (75.61% and 59.86% for methanol and ethanol, respectively). After four consecutive reaction cycles, halloysite was recovered and could be reused after washing and drying. The results showed that halloysite is a promising inexpensive and reusable material for esterification reactions involving fatty acids.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Clay minerals and soil interactions · Layered Double Hydroxides Synthesis and Applications · Iron oxide chemistry and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
Show source-provided references
1. Synthetic organic chemistry using pillared, cation-exchanged and acid-treated montmorillonite catalysts — a review10.1016/0169-1317(87)90039-1 ↗
2. Clay minerals as catalysts
3. 2002
4. Solvent free esterification reactions using Lewis acids in solid phase catalysis10.1016/j.apcata.2006.07.015 ↗
5. Use of nanotubes of natural halloysite as catalyst support in the atom transfer radical polymerization of methyl methacrylate10.1016/j.micromeso.2008.08.015 ↗
6. Structures and mineralogy of clay minerals
7. Brindley · 1980
8. Esterification of oleic acid for biodiesel production catalyzed by SnCl2: a kinetic investigation10.3390/en1020079 ↗
9. Production of biodiesel by esterification of palmitic acid over mesoporous aluminosilicate Al-MCM-4110.1016/j.fuel.2008.10.007 ↗
10. Bulk and surface properties of commercial kaolins10.1016/j.clay.2010.02.002 ↗
11. Studies on the acid activation of Brazilian smectitic clays
12. Styrene-butadiene rubber/halloysite nanotubes nanocomposites modified by sorbic acid10.1016/j.apsusc.2009.03.092 ↗
13. Surface acidities and catalytic activities of acid-activated clays10.1016/j.molcata.2003.11.013 ↗
14. Halloysite clay minerals — a review10.1180/0009855054040180 ↗
15. 12-Tungstophosphoric acid supported on MCM-41 for esterification of fatty acid under solvent-free condition10.1016/j.molcata.2006.09.029 ↗
16. Thermal treatment of kaolin: the effect of mineralogy on the pozzolanic activity10.1016/S0169-1317(01)00040-0 ↗
17. Esterification of alcohols with acetic acid over zeolites Hβ, HY and HZSM510.1016/j.apcata.2005.10.033 ↗
18. Knothe · 2005
19. Silver nanoparticle supported on halloysite nanotubes catalyzed reduction of 4-nitrophenol (4-NP)10.1016/j.apsusc.2008.10.094 ↗
20. Immobilization of metalloporphyrins into nanotubes of natural halloysite toward selective catalysts for oxidation reactions10.1016/j.molcata.2007.12.009 ↗
21. FTIR techniques in clay mineral studies10.1016/S0924-2031(02)00065-6 ↗
22. Esterification of free fatty acids using sulfuric acid as catalyst in the presence of triglycerides10.1016/j.biombioe.2008.01.001 ↗
23. Murray · 2007 · 2
24. Preparation of microporous silica from metakaolinite by selective leaching method10.1016/S1387-1811(98)00015-8 ↗
25. Enhancing Bronsted acid site activity of ion exchanged montmorillonite by microwave irradiation for ester synthesis10.1016/j.clay.2009.11.053 ↗
26. Weathering of granitic muscovite to kaolinite and halloysite and of plagioclase-derived kaolinite to halloysite10.1346/CCMN.1991.0390201 ↗
27. The rehydration of metakaolinite to kaolinite: evidence from solid-state NMR and cognate techniques10.1016/0022-4596(90)90267-2 ↗
28. Esterification reaction using solid heterogeneous acid catalysts under solvent-less condition
29. Silverstein · 2005
30. Simultaneous free fatty acid esterification and triglyceride transesterification using a solid acid catalyst with in situ removal of water and unreacted methanol10.1021/ie800889w ↗
31. Preparation of mesoporous polyoxometalate-tantalum pentoxide composite catalyst for efficient esterification of fatty acid10.1016/j.catcom.2008.01.005 ↗
32. H3PW12O40 immobilized on silylated palygorskite and catalytic activity in esterification reactions10.1016/j.clay.2009.10.014 ↗
33. Emerging trends and challenges in synthetic clay-based materials and layered double hydroxides10.1016/j.clay.2009.12.018 ↗