Process of producing resorcinol by hydrolyzing m-phenylenediamine
A technology of m-phenylenediamine and resorcinol, which is applied in the field of resorcinol preparation, can solve the problems of oxidation, complex extraction process, lengthy production process, and low environmental friendliness, so as to reduce the generation of coke, The effect of high product yield and low environmental friendliness
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[0022] Example 1:
[0023] In a 5L autoclave equipped with stirring (heated by electric heating coil), add 216.0g m-phenylenediamine, 350.0g hydrochloric acid (concentration 30%), 2200g water, 27.94g SO 4 2- / ZrO 2 -TiO 2 , The temperature of the material liquid does not exceed 80 ℃, and stir for 30 minutes after the addition to make the material mixed evenly. After sealing, heat to 200℃, pressure 1.8MPa, keep the temperature for 10 hours, and cool to room temperature 30℃ after the reaction; take out the reaction liquid, filter, extract 4 times with 250.0g ether, distill the solvent to obtain 175.0g crude product, content It is 95.50%, and the product is distilled at 1.8KPa to obtain 162.0g of product with a content of 99.38%.
Example Embodiment
[0024] Example 2:
[0025] In a 5L autoclave equipped with stirring (heated by electric heating coil), add 220.8g m-phenylenediamine, 368.0g sulfuric acid (98% concentration), 2600g water, and 354.31g SO 4 2- / ZrO 2 -TiO 2 , The temperature of the material liquid does not exceed 80 ℃, and stir for 30 minutes after the addition to make the material mixed evenly. After sealing, heat to 220°C, pressure 2.2MPa, heat preservation for 8 hours, and cool to room temperature 30°C after the reaction; take out the reaction liquid, filter, extract 4 times with 400g ethyl acetate, distill the solvent to obtain 185.0g crude product, The content is 95.30%, and the product is distilled at 2.0KPa to obtain 178.0g, and the content is 99.40%.
Example Embodiment
[0026] Example 3:
[0027] In a 5L autoclave equipped with stirring (heated by electric heating coil), add 426.0g m-phenylenediamine, 240.0g hydrochloric acid (concentration 30%), 2600g water, 40.0g SO 4 2- / TiO 2 -SnO 2 , The temperature of the material liquid does not exceed 80 ℃, and stir for 30 minutes after the addition to make the material mixed evenly. After sealing, heat to 200℃, pressure 2MPa, keep for 4 hours, and cool to room temperature 30℃ after the reaction; take out the reaction liquid, filter, extract 4 times with 500g isobutanol, evaporate the solvent to obtain 295.0g crude product, content The product is 95.25%, and 281.0g is obtained by distillation at 1.9KPa, with a content of 99.50%.
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