室温磺酸催化多聚甲醛合成双酚F的研究
Research on the synthesis of bisphenol F from paraformaldehyde through sulfonic acid catalysis at room temperature
To improve the selectivity of 4,4'-bisphenol F,a study on the synthesis of bisphenol F was conducted in an organic solvent at a relatively low temperature,using sulfonic acid as the catalyst and paraformaldehyde as the formaldehyde source.The effects of sulfonic acid type,solvent type,reaction temperature,phenol-to-formaldehyde molar ratio,acid-to-formaldehyde molar ratio,solvent dosage and reaction time on the synthetic reaction were investigated.The results indicated that under the optimal reaction conditions—trifluoromethanesulfonic acid as the catalyst,isopropyl ether as the solvent,reaction temperature of 25℃,phenol-to-formaldehyde molar ratio of 10∶1,acid-to-formaldehyde molar ratio of 0.1∶1,solvent dosage of 5 mL and reaction time of 24 h—the yield of bisphenol F reached 86.31%,the selectivity of 4,4'-bisphenol F could reach 60.12%,and the yield of 4,4'-bisphenol F was 51.89%.
bisphenol F / sulfonic acid / paraformaldehyde / isomer / selectivity
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