Synthesis process of p-tert-butyl phenol formaldehyde resin
A technology of p-tert-butylphenol and formaldehyde resin, which is applied in the field of synthesis of p-tert-butylphenol-formaldehyde resin, can solve the problems of severe strong alkali catalyzed reaction, reduced washing times, poor product stability, etc.
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Embodiment 1
[0022] Turn on the stirring, put 100Kg of 37% formaldehyde solution into the reaction kettle under normal pressure, then add 10Kg of 25% ammonia water into the reaction kettle, and then add 100Kg evenly within 100 minutes at a temperature of 50-55°C For p-tert-butylphenol, heat up to boiling in 60 minutes, keep boiling for 150 minutes, cool down to 60°C, add 4.5Kg of acetic acid to neutralize, stir for 5 minutes, add 180Kg of toluene for extraction, then stop stirring and let stand for 10 minutes, Drain the wastewater from the valve at the bottom of the reactor, add 1.0kg of oxalic acid, then start stirring and add 80Kg of tap water, stir for 5 minutes, then stop stirring and let it stand for 10 minutes, then discharge the wastewater from the valve at the bottom of the reactor, and check the pH ≈ 7-7.5 , desolvation under normal pressure, temperature rises to 150°C, vacuumizes to -0.080MPa, softening point reaches 95-100°C and discharges to obtain p-tert-butylphenol formaldehyd...
Embodiment 2
[0024] Turn on the stirring, put 110Kg of 37% formaldehyde solution into the reaction kettle under normal pressure, then add 8Kg of 25% ammonia water into the reaction kettle, and then add 100Kg evenly within 95 minutes at a temperature of 50-55°C For p-tert-butylphenol, heat up to boiling in 70 minutes, keep boiling for 160 minutes, cool down to 65°C, add 3.5Kg of acetic acid to neutralize, stir for 10 minutes, add 180Kg of toluene for extraction, then stop stirring and let it stand for 15 minutes. Drain the wastewater from the valve at the bottom of the reactor, add 1.5kg of oxalic acid, then start stirring and add 70Kg of tap water, stir for 8 minutes, then stop stirring and let it stand for 12 minutes, then discharge the wastewater from the valve at the bottom of the reactor, and check the pH ≈ 7-7.5 , desolvation under normal pressure, temperature rises to 145°C, vacuumizes to -0.085MPa, softening point reaches 95-100°C and discharges to obtain p-tert-butylphenol formaldeh...
Embodiment 3
[0026] Turn on the stirring, put 100Kg of 37% formaldehyde solution into the reaction kettle under normal pressure, then add 9Kg of 25% ammonia water into the reaction kettle, and then add 100Kg evenly within 90 minutes at a temperature of 50-55°C For p-tert-butylphenol, heat up to boiling in 65 minutes, keep boiling for 160 minutes, cool down to 62°C, add 4.0Kg of acetic acid to neutralize, stir for 5 minutes, add 180Kg of toluene for extraction, then stop stirring and let stand for 20 minutes, Drain the wastewater from the valve at the bottom of the reactor, add 2.0kg of oxalic acid, then start stirring and add 70Kg of tap water, stir for 5 minutes, then stop stirring and let it stand for 16 minutes, then discharge the wastewater from the valve at the bottom of the reactor, and check the pH ≈ 7-7.5 , desolvation under normal pressure, temperature rises to 155°C, vacuumizes to -0.083MPa, softening point reaches 95-100°C and discharges to obtain p-tert-butylphenol formaldehyde ...
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