Abstract
The catalytic activities of acid catalysts for the acetylation of triethyl citrate with acetic anhydride in the preparation of acetyl triethyl citrate were evaluated. Microporous zeolites such as HZSM-5 and HY zeolites catalysts were introduced as heterogeneous acid catalysts. HZSM-5 zeolite catalysts showed a high conversion of triethyl citrate and excellent selectivity of acetyl triethyl citrate. The catalytic activities of HZSM-5 zeolites were superior to those of the HY zeolites. In particular, the selectivity of acetyl triethyl citrate on HZSM-5 zeolites exceeded 95%. The moderate acid strength of HZSM-5 (Si/Al = 75) zeolite led to the highest catalytic activities among the HZSM-5 zeolite catalysts, which have various acid strengths.
Highlights
Polyvinyl chloride (PVC) is one of the useful and important polymers that is used widely in the formation of rigid and flexible PVC [1,2]
In traditional phthalic anhydride synthesis processes from the gas-phase oxidation of naphthalene, some aromatic trace impurities may remain in the plasticizer, preventing its use in products designed for direct contact with humans [13]
This paper reports the preparation of Acetyl triethyl citrate (ATEC) by the acetylation of triethyl citrate (TEC) with acetic anhydride on a range of acid catalysts
Summary
Polyvinyl chloride (PVC) is one of the useful and important polymers that is used widely in the formation of rigid and flexible PVC [1,2]. Plasticizers are added to PVC in the production of flexible. Phthalic esters, such as di-2-ethylhexyl phthalate, diisodecyl phthalate, and diisononyl phthalate, have been used as plasticizers. Phthalates are well-known general-purpose plasticizing agents that have been used in a variety of polymeric materials [5,6,7], some studies have indicated that they may represent certain risks to human health and are not biodegraded [8,9,10,11,12]. In traditional phthalic anhydride synthesis processes from the gas-phase oxidation of naphthalene, some aromatic trace impurities may remain in the plasticizer, preventing its use in products designed for direct contact with humans [13]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
