Keywords

Chloroacrylic acids, Chloropropenes

Abstract

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, CoMoO₄-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 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.

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

PDF

Pages

71 pages

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

Contributor (Linked data)

Clausen, Chris A., 1940- [VIAF]

Clausen, Chris A., 1940- [LC]

Collection (Linked data)

Retrospective Theses and Dissertations

Included in

Chemistry Commons

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