Process for refining and concentrating hydrogen peroxide obtained by anthraquinone process
An anthraquinone hydrogen peroxide and hydrogen peroxide technology, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., to achieve raw material consumption The effect of reduction, low cost and simple equipment
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Embodiment 1
[0060] 1. make the hydrogen peroxide raw material liquid of 827.4kg (concentration is 20.7%, TOC is 147ppm, chromaticity is 20 black Zeng, non-volatile matter is 0.034%) with the flow rate of 450L / h to flow through active oxygen aluminum column from top to bottom ( 1) and ion exchange resin column (2);
[0061] ② The effluent is sent into the filter (3) by a centrifugal pump to filter;
[0062] ③The filtrate flows through the macroporous adsorption resin column (4) from top to bottom to obtain the purified liquid;
[0063] ④The purified liquid enters the preheater (5), and is preheated to near the boiling point under the system pressure of 10kPa, and then
[0064] 5. enter wherein from the bottom of rising film evaporator (6) and carry out partial evaporation, and the evaporation rate is controlled at 74%;
[0065] 6. The gas-liquid mixture steamed from the top of the rising film evaporator (6) enters into it from the middle and upper part of the gas-liquid separator (7) and...
Embodiment 2
[0068] The operating steps are the same as in Example 1. Make concentration be 27.6%, TOC is 167ppm, chroma is 25 black, non-volatile matter is 902.4kg of dilute hydrogen peroxide raw material solution 902.4kg with the flow rate of 260L / h successively through alumina post (1), ion exchange resin After column (2), filter (3) and macroporous adsorption resin column (4) are processed, the purified liquid that obtains is pumped in the preheater (5) with the flow rate of 250L / h, is heated to close to system pressure under 15kPa Boiling point, evaporates with 59% evaporation rate in evaporator (6), obtain concentrated product I397.2kg by gas-liquid separator (7) bottom, its concentration is 50.9%, TOC is 159ppm, chromaticity is 18 black Zeng, Non-volatile matter is 0.017%; Rectifying under system pressure 15kPa, reflux ratio is 0.18, obtains concentrated product II90.0kg at the bottom of rectifying tower (8), its concentration is 50.4%, TOC is 42ppm, chromaticity is 13 black Zeng, ...
Embodiment 3
[0070] Crude hydrogen peroxide 3032.8kg (concentration 30.7%, TOC225ppm, chromaticity 25 black, non-volatile matter 0.035%) directly pumps in the filter (3) with the flow rate of 330L / h, and the filtrate flows through from top to bottom Hole adsorption resin column (4), the purified liquid obtained enters the preheater (5) with the same flow rate and is preheated to the boiling point near the system pressure of 9kPa, evaporates with an evaporation rate of 51% in the rising film evaporator (6) , obtain concentrated product I1602.0kg (concentration is 50.3%, TOC is 137ppm, chromaticity is 16 black Zeng, nonvolatile matter is 0.054%) at the bottom of gas-liquid separator (7); at system pressure 9kPa, reflux ratio is Rectifying under the condition of 0.18, obtain concentrated product II244.8kg (concentration is 50.0%, TOC is 38ppm, chromaticity is 13 black Zeng, nonvolatile matter is 0.003%) at the bottom of rectifying column (8). The overall yield of the process is 99.7%.
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