Multiplex communications – Generalized orthogonal or special mathematical techniques – Fourier transform
Patent
1979-11-02
1980-11-25
Davis, Curtis R.
Multiplex communications
Generalized orthogonal or special mathematical techniques
Fourier transform
C07C 2504
Patent
active
042358256
ABSTRACT:
Dichlorobenzene having a higher ratio of para isomer to ortho isomer is produced by the liquid phase chlorination of benzene or monochlorobenzene in the presence of a two-component catalyst consisting of a metal halide, e.g., ferric chloride, and diethylether.
REFERENCES:
patent: 3029296 (1962-04-01), White et al.
patent: 3636171 (1972-01-01), Krumel et al.
patent: 4017551 (1977-04-01), Milam et al.
patent: 4166075 (1979-08-01), Blumenfield et al.
Davis Curtis R.
PPG Industries Inc.
Whitfield Edward J.
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