Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1993-06-02
1995-12-05
Rotman, Alan L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
570208, C07C 2506, C07D21361
Patent
active
054730848
ABSTRACT:
A heterogeneous catalytic chlorination process for making chlorinated aromatic compounds with high para-selectivity. Examples of chlorinated aromatic compounds that can be prepared using the process disclosed in the present invention include those compounds represented by the following formula: ##STR1## wherein R can be a C1-C3 alkyl, floride, chloride, bromide, iodide, or hydroxyl group. The chlorination process utilizes a de-aluminated zeolite which is prepared by H.sub.4 EDTA or Na.sub.4 EDTA extraction of L-type zeolite to reduce the alumina content thereof. The SiO.sub.2 /Al.sub.2 O.sub.3 ratio of the de-aluminated zeolite is preferably between about 9 and about 40. The de-aluminated zeolite can be ion-exchanged with Group IA or IIA metal ions to further improve its para-selectivity.
Chen Po-Yu
Chuang Ying-Tse
Lin Wen-Chyi
Wang Shian-Jy
Industrial Technology Research Institute
Liauh W. Wayne
Rotman Alan L.
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