Method for continuous production of high-concentration methylal
A technology of methylal and formaldehyde, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as difficult to handle, high loss of raw materials, and difficult
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[0044] Example 1
[0045] Preheat 37% industrial formaldehyde solution to 40°C, add it to the formaldehyde feed port of the reactive distillation column with a metering pump at a rate of 75.7Kg / h; preheat 99% industrial methanol to 40°C, use a metering pump to add 12.1Kg The speed of / h was added to the methanol feed port at the inlet of the secondary reactor A, and at the same time, the metering pump was added to the methanol feed port at the inlet of the secondary reactor C at a speed of 18.1Kg / h; The control temperature of the tower still is 102°C, and the reflux ratio is 5:1.
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[0046] Example 2
[0047] Preheat 37% industrial formaldehyde solution to 40°C, add it to the formaldehyde feed port of the reactive distillation column with a metering pump at a rate of 75.7Kg / h; preheat 99% industrial methanol to 40°C, use a metering pump to add 12.1Kg The speed of / h was added to the methanol feed port at the inlet of the secondary reactor A, and at the same time, the metering pump was added to the methanol feed port at the inlet of the secondary reactor C at a speed of 18.1Kg / h; The control temperature of the tower still is 102°C, and the reflux ratio is 5:1.
Example Embodiment
[0048] Example 3
[0049] Preheat 37% industrial formaldehyde solution to 40°C, add it to the formaldehyde feed port of the reactive distillation column with a metering pump at a rate of 75.7Kg / h; preheat 99% industrial methanol to 40°C, use a metering pump to add 12.1Kg The speed of / h was added to the methanol feed port at the inlet of the secondary reactor A, and at the same time, the metering pump was added to the methanol feed port at the inlet of the secondary reactor C at a speed of 18.1Kg / h; The control temperature of the tower still is 102°C, and the reflux ratio is 5:2.
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