反应详情

温度

60 °C

Into another reactor having the same equipments as described above were charged 220 parts (2 mol) of resorcin, 110 parts of water and 2.5 parts of oxalic acid, and the resulting mixture was heated at 60° C. to form a solution. Then, the above obtained m-cresol-formaldehyde reaction liquid was added dropwise to the solution in 2 hours while agitating the resulting mixture at 60° C. After completion of the addition, the resulting mixture was further agitated at 60° C. for 3 hours, and then water in the reaction liquid was removed. The residue was poured into a distillation vessel, and unreacted m-cresol and resorcin were removed by a distillation under reduced pressure to obtain a m-cresol/resorcin/formaldehyde cocondensate.

1. customInto another reactor having
2. customto form a solution
3. customThen, the above obtained
4. additionwas added dropwise to the solution in 2 hours
5. additionAfter completion of the addition
6. stirringthe resulting mixture was further agitated at 60° C. for 3 hours
7. customwas removed
8. additionThe residue was poured into a distillation vessel
9. customunreacted m-cresol and resorcin were removed by a distillation under reduced pressure