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Vapor phase oxidation of chloropropenes over heterogeneous catalyst systems

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Date Issued:
1976
Abstract/Description:
Florida Technological University College of Natural Sciences Thesis; Propylene Dichloride (PDC) is a byproduct of several Dow processes. The thermal cracking of PDC produces l - cis-chloropropene , I - trans-chloropropene, 2- chloropropene , and allyl chloride . By oxidizing the 1 - 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 275°C to 425°C. The air content of the feed was varied between 41 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, CoMo O4- 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 200C and above, and found to be unstable with regard to decomposition to coke. It was concluded that the vapor phase oxidation of chloropropenes over heterogeneous catalysts to chloroacrylic acids is not feasible because of their decomposition to carbon at the prevailing reaction conditions
Title: Vapor phase oxidation of chloropropenes over heterogeneous catalyst systems.
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Name(s): Owen, Tim Ellis, Author
Clausen, Chris A., Committee Chair
Natural Sciences, Degree Grantor
Type of Resource: text
Date Issued: 1976
Publisher: Florida Technological University
Language(s): English
Abstract/Description: Florida Technological University College of Natural Sciences Thesis; Propylene Dichloride (PDC) is a byproduct of several Dow processes. The thermal cracking of PDC produces l - cis-chloropropene , I - trans-chloropropene, 2- chloropropene , and allyl chloride . By oxidizing the 1 - 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 275°C to 425°C. The air content of the feed was varied between 41 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, CoMo O4- 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 200C and above, and found to be unstable with regard to decomposition to coke. It was concluded that the vapor phase oxidation of chloropropenes over heterogeneous catalysts to chloroacrylic acids is not feasible because of their decomposition to carbon at the prevailing reaction conditions
Identifier: CFR0003494 (IID), ucf:53026 (fedora)
Note(s): 1976-11-01
M.S.
Industrial Chemistry
Masters
This record was generated from author submitted information.
Electronically reproduced by the University of Central Florida from a book held in the John C. Hitt Library at the University of Central Florida, Orlando.
Subject(s): Chloroacrylic acids
Chloropropenes
Persistent Link to This Record: http://purl.flvc.org/ucf/fd/CFR0003494
Restrictions on Access: public
Host Institution: UCF

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