Preparation method of energy-saving and environment-friendly furan resin casting alcohol-based curing agent
A furan resin, energy-saving and environment-friendly technology, applied in casting and molding equipment, molds, cores, etc., can solve the problems of residual benzene, large amount of waste water, and long preparation time.
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Embodiment 1
[0022] Table 1 Weighing of Curing Agent Type A
[0023] raw material name weight sulfuric acid 651kg Methanol 337kg Propylene carbonate 6kg Glyceryl acetate 6kg
[0024] The preparation method is as follows:
[0025] 1. Put sulfuric acid into the reaction kettle, pass cooling water, and start the mixer to stir;
[0026] 2. Throw methanol into the reaction kettle, add slowly, and keep the temperature not exceeding 50°C;
[0027] 3. Add propylene carbonate and glyceryl acetate to the reaction kettle, and stir for 40-50 minutes;
[0028] 4. After standing for 10-15 minutes, filter to obtain the A-type curing agent.
[0029] Table 2 Type A Curing Agent Indicators
[0030] Indicator name Indicator data value Density (20℃) g / m³ 1.3 Total acidity % 38 Viscosity (20℃)mpa.s 0.05 Free acid% 14
[0031] Table 3 Weighing of Curing Agent Type B
[0032] raw material name weight Class A ...
Embodiment 2
[0040] Table 5 Curing Agent Class A Weighing
[0041] raw material name weight sulfuric acid 500kg Methanol 488kg Propylene carbonate 6kg Glyceryl acetate 6kg
[0042] The preparation method is as follows:
[0043] 1. Put sulfuric acid into the reaction kettle, pass cooling water, and start the mixer to stir;
[0044] 2. Throw methanol into the reaction kettle, add slowly, and keep the temperature not exceeding 50°C;
[0045] 3. Add propylene carbonate and glyceryl acetate to the reaction kettle, and stir for 40-50 minutes;
[0046] 4. After standing for 10-15 minutes, filter to obtain the A-type curing agent.
[0047] Table 6 Type A Curing Agent Indicators
[0048] Indicator name Indicator data value Density (20℃) g / m³ 1.12 Total acidity % 27 Viscosity (20℃)mpa.s 0.07 Free acid% 16
[0049] Table 7 Weighing of Curing Agent Type B
[0050] raw material name weight Class A c...
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