Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1981-02-11
1983-01-11
Helfin, Bernard
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C07C 4549
Patent
active
043683363
ABSTRACT:
A xylene mixture containing at least one of m-xylene and o-xylene is formylated by carbon monoxide in the presence of hydrogen fluoride and boron trifluoride at a molar ratio of boron trifluoride to sum total of m-xylene and o-xylene in the xylene mixture of not more than 1.5 to selectively and correspondingly produce at least one of 2,4-dimethylbenzaldehyde and 3,4-dimethylbenzaldehyde.
REFERENCES:
patent: 2485237 (1949-10-01), Gresham et al.
Fujiyama Susumu
Matsumoto Shunichi
Takamizawa Yuji
Helfin Bernard
Mitsubishi Gas Chemical Company Inc.
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