Option One:
According to calculations, the content of Na (CH) SO4 in the SUV-4 mother liquor was 25%. 200 g of the SUV-4 mother liquor was taken, and 8.0 g of NaOH was added to the distillation. The liquid phase temperature is about 50 ° C, and the gas phase temperature is about 40 ° C. Na2SO4 crystals are precipitated. The amount of the solution Na2SO4 is detected, and the content is measured by titration. The content of Na2SO4 was 0.0819g / L when it was quickly evaporated to dryness. The content of Na (CH3) SO4 in 200g mother liquor was not calculated because it was not evaporated to dryness and the amount of sodium sulfate was not stated.
Option II
According to calculations, the content of Na (CH3) SO4 in the SUV-4 mother liquor was 25%. 100 g of the SUV-4 mother liquor was taken and concentrated. The liquid phase temperature is around 50C and the gas phase temperature is around 40C. To the concentrate was added 18.1 g of phenol and 8.3 g of concentrated base (the content of concentrated base was not known before, and the amount was found to be smaller). Reaction at room temperature. GC detection found that 26% of anisole was formed. When the temperature was heated to 40 ° C, it was found that anisole had decomposed. Therefore, the following scheme three is designed
According to the calculation, the content of Na (CH3) SO4 in the SUV-4 mother liquor was 25%. 200 g of the SUV-4 mother liquor was taken and concentrated. The liquid phase temperature is about 50 "C, and the gas phase temperature is about 40C. The concentrated liquid is cooled and then used.
Take 35g of phenol and add it to 116g of 13% liquid alkali solution (the alkali dosage ratio found on the Internet is 2.2: 1
), After stirring until completely dissolved, cool to 10C, add the above-mentioned cooled concentrated solution under rapid stirring, co控制反应温度不超过30度,and react at room temperature after the addition is complete. GC control test. After the reaction is over. Cool and stand by layers, discard the water layer, dry the oil layer with anhydrous calcium chloride and dehydrate, and distill under reduced pressure.