Lignin-based strong-acid ion exchange resin and preparation method thereof
An ion exchange resin and lignin-based technology, which is applied in the field of lignin-based strongly acidic ion exchange resin and its preparation, can solve problems such as environmental pollution, waste of renewable resources, etc., and achieves lower production costs, lower raw materials, and benefits to the preparation process. effect of industrialization
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Embodiment 1
[0015] The preparation method of the lignin-based strongly acidic ion-exchange resin comprises the following steps and process conditions: take 10g of sodium lignosulfonate and place it in a tubular reaction furnace, and heat up the reaction furnace to 150°C under the protection of nitrogen. Carbonize at constant temperature for 5 hours to obtain a dark brown solid product, which is ground into powder after cooling, then add a hydrochloric acid solution with a concentration of 6mol / L, undergo ion exchange for many times, and then wash the carbonized sample with a large amount of deionized water for many times until the filtrate Add silver nitrate solution until no precipitate is formed. The cleaned carbonized sample is vacuum filtered to separate the dark brown powder product into a mortar, and dried in a constant temperature blast drying oven at 100°C to obtain a lignin-based strongly acidic ion exchange resin with a cation exchange capacity of It is 4.4mmol / g, and the ion ex...
Embodiment 2
[0017] The preparation method of the lignin-based strongly acidic ion exchange resin comprises the following steps and process conditions: taking 15g of sodium lignosulfonate and placing it in a tubular reaction furnace, and heating the reaction furnace to 200°C under the protection of nitrogen. Carbonize at constant temperature for 10 hours to obtain a dark brown solid product, which is ground into powder after cooling, then add a hydrochloric acid solution with a concentration of 6mol / L, undergo ion exchange for many times, and then wash the carbonized sample with a large amount of deionized water for many times until the filtrate Add silver nitrate solution until no precipitate is formed. The cleaned carbonized sample is vacuum filtered to separate the dark brown powder product into a mortar, and dried in a constant temperature blast drying oven at 100°C to obtain a lignin-based strongly acidic ion exchange resin with a cation exchange capacity of It is 4.7mmol / g, and the i...
Embodiment 3
[0019] The preparation method of the lignin-based strongly acidic ion exchange resin comprises the following steps and process conditions: 5g of calcium lignosulfonate is weighed and placed in a tubular reaction furnace, and the temperature of the reaction furnace is raised to 210°C under the protection of nitrogen. Carbonize at constant temperature for 20 hours to obtain a dark brown solid product, which is ground into powder after cooling, then add a hydrochloric acid solution with a concentration of 6mol / L, undergo ion exchange for many times, and then wash the carbonized sample with a large amount of deionized water for many times until the filtrate Add silver nitrate solution until no precipitate is formed. The cleaned carbonized sample is vacuum filtered to separate the dark brown powder product into a mortar, and dried in a constant temperature blast drying oven at 100°C to obtain a lignin-based strongly acidic ion exchange resin with a cation exchange capacity of It is...
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