Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1989-06-07
1991-10-01
Evans, J. E.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C07C 2970, C07C 3112
Patent
active
050535609
ABSTRACT:
A method for the continuous production of anhydrous potassium tert-butoxide in a packed distillation column, wherein aqueous potash lye is fed with excess tert-butyl alcohol to the top of the column. Water formed in the reaction as well as water brought in with the reactants is distilled out at the top using methylcyclohexane or n-heptane as withdrawing agent. The amount of the withdrawing agent and of the tert-butanol must be selected such that above the column boiler a content between 0.2 and 2 wt.-% of the withdrawing agent is present in the gas mixture, while the gas mixture in the middle of the column has either between 32 and 34 wt.-% of methylcyclohexane or 36 to 38 wt.-% of n-heptane. The water together with the withdrawing agent and tert-butanol is withdrawn from the top of the column and then condensed. The organic phase of the condensate is fed back to the column.
REFERENCES:
patent: 1712830 (1929-05-01), Kyrides
patent: 3920713 (1975-11-01), Feichtinger et al.
patent: 4150244 (1979-04-01), Knorre et al.
patent: 4577045 (1986-03-01), Matthes et al.
Matthes Rheinhard
Rauleder Hartwig
Vahlensieck Hans-Joachim
Evans J. E.
Huels Aktiengesellschaft
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