Paracresol separation method
A separation method, the technology of p-cresol, applied in the field of separation, can solve the problems of complex process, complicated separation process, and large solvent consumption, and achieve the effect of simple process, simple operation, and avoiding a large amount of solvent consumption
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[0035] Example 1
[0036] A mixture with 60% p-cresol from coal liquefied oil was used as the mixed mother liquor. Add the mixed mother liquor into the reaction kettle with cold trap and stirring; turn on the stirring and low temperature cold trap, lower the cold trap to 10°C, and add p-cresol crystals as crystal seeds, the size of which is 200 mesh, so that the mixed mother liquor is Crystallize in the reaction kettle for 120 minutes to generate p-cresol crystalline product; in a cold trap at a temperature of 20°C, suction-filter the mixed mother liquor containing the crystalline product, and quickly transfer the obtained crystalline product. The analysis results of the purity and yield of p-cresol are shown in Table 1.
Example Embodiment
[0037] Example 2
[0038] A mixture with 60% p-cresol from coal tar was used as the mixed mother liquor. The mixed mother liquor was added to the reaction kettle with cold trap and stirring; the stirring and low temperature cold trap were turned on, and the cold trap was lowered to 12° C., and stirred for 180 minutes; Stir and crystallize, and react for a period of time to generate p-cresol crystalline product; in a cold trap at a temperature of 20° C., suction-filter the mixed mother liquor containing the crystalline product, and quickly transfer the obtained crystalline product. The analysis results of the purity and yield of p-cresol are shown in Table 1.
Example Embodiment
[0039] Example 3
[0040] A mixture with 60% p-cresol from crude phenolic oil in mixed phenol was used as mixed mother liquor. Add the mixed mother liquor into the reaction kettle with cold trap and stirring; turn on the stirring and low temperature cold trap, lower the cold trap to 14°C, add p-cresol crystals as crystal seeds, and the size of the crystal seeds is 200 mesh, so that the mixed mother liquor is at 14°C. Crystallize in the reaction kettle for 180 minutes to generate p-cresol crystalline product; in a cold trap at a temperature of 20°C, suction-filter the mixed mother liquor containing the crystalline product, and quickly transfer the obtained crystalline product. The analysis results of the purity and yield of p-cresol are shown in Table 1.
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