Lignin modified thermoplastic phenolic resin and preparation method thereof
A technology of phenolic resin and lignin, which is applied in the field of thermoplastic phenolic resin, can solve the problems of low phenol substitution rate and low chemical activity, and achieve the effects of improving reactivity, increasing the number of total hydroxyl groups, and increasing substitution rate
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Embodiment 1
[0048] (1) Preparation of rare earth metal oxide / activated carbon catalyst
[0049] 0.1135kg Ce(NO 3 ) 3 ·6H 2 O was dissolved in 500ml of 1mol / L dilute nitric acid, and then 0.3kg of activated carbon was added, fully stirred at room temperature, impregnated for 5 hours, and then vacuum-dried at 30, 70, and 120°C for 6 hours respectively. Before the catalytic reaction, the catalyst Activation at 200 and 350 °C for 1 hour under the protection of nitrogen flow in a tubular resistance furnace, respectively, to obtain CeO with a loading capacity of 15% by weight of the carrier 2 / C Catalyst.
[0050] (2) Preparation of lignin-modified thermoplastic phenolic resin
[0051] Mix the extracted 10kg catechol with 2kg sulfuric acid lignin (Shandong Huatai Paper Co., Ltd.), and then add 0.1kg CeO 2 / C catalyst, stir evenly, then slowly heat the mixture to 160°C, and activate the reaction at 160°C for 0.5 hours; after the activation reaction is completed, add 10kg of ethanol to the m...
Embodiment 2
[0054] (1) Preparation of rare earth metal oxide / activated carbon catalyst
[0055] 0.0378kg Ce(NO 3 ) 3 ·6H 2 O was dissolved in 500ml of 1mol / L dilute nitric acid, and then 0.3kg of activated carbon was added, fully stirred at room temperature, impregnated for 5 hours, and then vacuum-dried at 30, 70, and 120°C for 6 hours respectively. Before the catalytic reaction, the catalyst Activation at 200 and 350 °C for 1 hour under the protection of nitrogen flow in a tube resistance furnace, respectively, to obtain CeO with a loading capacity of 5% by weight of the carrier 2 / C Catalyst.
[0056] (2) Preparation of lignin-modified thermoplastic phenolic resin
[0057] Mix the extracted 10kg phenol with 5kg enzymatic lignin (Shandong Longli Biotechnology Co., Ltd.), and then add 1kg CeO 2 / C catalyst, stir evenly, then slowly heat the mixture to 120°C, and activate the reaction at 120°C for 3 hours; , filter with filter paper to remove insoluble matter and recover the filtrat...
Embodiment 3
[0060] (1) Preparation of rare earth metal oxide / activated carbon catalyst
[0061] 0.06375kg La(NO 3 ) 3 ·6H 2 O was dissolved in 500ml of 1mol / L dilute nitric acid, and then 0.3kg of activated carbon was added, fully stirred at room temperature, impregnated for 5 hours, and then vacuum-dried at 30, 70, and 120°C for 6 hours respectively. Before the catalytic reaction, the catalyst Activation at 200 and 350 °C for 1 hour under the protection of nitrogen flow in a tubular resistance furnace, respectively, to obtain La with a loading capacity of 8% by weight of the carrier. 2 o 3 / C Catalyst.
[0062] (2) Preparation of lignin-modified thermoplastic phenolic resin
[0063] Mix the extracted 10kg phenol with the high boiling alcohol lignin (Jiang Tingda, Lignin, Chemical Industry Press, 2008, 12:98) of 3kg corn stalks, and then add 0.2kg La 2 o 3 / C catalyst, stir evenly, then slowly heat the mixture to 100°C, and activate the reaction at 90°C for 5 hours; after the activ...
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