Keywords
Chloroacrylic acids, Chloropropenes
Abstract
Propylene Dichloride (PDC) is a byproduct of several Dow processes. The thermal cracking of PDC produces 1-cis-chloropropene, 1-trans-chloropropene, 2-chloropropene, and allyl chloride . By oxidizing the l- and 2-chloropropenes to 3- and 2- chloroacrylic acids, respectively, a potentially valuable product could be made. The chloropropenes, air, and steam were passed over various heterogeneous oxidation catalyst systems to attempt this oxidation. Contact time was varied between 0.0951 to 0.915 sec. Temperature was varied between 275C to .25C. The air content of the feed was varied between .1 to 75%. The chloropropene content of the feed was varied between 2.9% to 5.0% . The following supported catalysts were tested Co/Mo (3/7)-alumina pellets , CoMoO4-alumina granules, CoMo04-silica gel, AcNbMo-alumina pellets, two bed catalyst MoFeTeRe- MoVGeMo- silica gel, CoMoTe- silica gel, and CoMoBi-alumina pellets. No chloroacroleins, or chloroacrylic acids were detected in the reaction products. In general, no CO and from 5- 15% CO2 was obtained in the reaction products with the alumina and silica support materials. Oxidation over the metal catalysts produced 0-10% CO and 5-40% CO2. Severe carbonization of the supports with and without the metal catalysts was observed at the reaction conditions described above. Chloropropenes were found to be unstable, decomposing to carbon at 300°C in an empty reactor at a contact time greater than 0.1 sec. Chloroacrylic acids at a 0.1 sec contact time were tested in the reactor over alumina and silica support materials at 200°C and above, and found to be unstable with regard to decomposition to coke. It was concl uded that the vapor phase oxidation of chloropropenes over heterogeneous catalysts to chloroacrylic acids is not feasible because of their decomposition to car bon at the prevailing reaction conditions.
Notes
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Graduation Date
1976
Advisor
Clausen, Chris A.
Degree
Master of Science (M.S.)
College
College of Social Sciences
Degree Program
Industrial Chemistry
Format
Pages
71 p.
Language
English
Rights
Written permission granted by copyright holder to the University of Central Florida Libraries to digitize and distribute for nonprofit, educational purposes.
Length of Campus-only Access
None
Access Status
Masters Thesis (Open Access)
Identifier
DP0003494
Subjects
Chloroacrylic acids, Chloropropenes
STARS Citation
Owen, Tim Ellis, "Vapor Phase Oxidation of Chloropropenes Over Heterogeneous Catalyst Systems" (1976). Retrospective Theses and Dissertations. 246.
https://stars.library.ucf.edu/rtd/246
Collection (Linked data)
Accessibility Status
Searchable text