FePO_4催化茶叶残渣制备5-羟甲基糠醛

Synthesis of 5-Hydroxymethylfurfural From Tea Residue With FePO_4 Catalyst

以氯化铁和磷酸为原料,采用直接沉淀法制备催化剂FePO_4,研究其对茶叶残渣(TR)催化合成5-羟甲基糠醛(5-HMF)的催化活性。在单因素实验(FePO_4用量、反应温度、物料比和催化时间)的基础上,设计4因素3水平响应面实验,优化FePO_4催化茶叶残渣制备5-HMF的工艺条件。结果表明,合成5-HMF的最佳工艺条件是催化剂用量0.015 0 g、反应温度140℃、物料比2000:1 (mg/L)和催化时间35 min,该条件下,5-HMF产量17.85 mg_(5-HMF)/g_(TR)。FePO_4催化合成5-HMF为茶叶残渣的高效利用提供了一条可行途径。

FePO4 sample was prepared from ferric chloride and phosphoric acid by the direct precipitation method, its catalytic activity for synthesis of 5-hydroxymethylfurfural（5-HMF） from tea residue（TR） was investigated. Based on the single factor experiment（such as FePO4 dosage, reaction temperature, catalysis time, material-to-solvent ratio）, experimental conditions of preparing 5-HMF from tea residue over FePO4 sample were optimized by 4-factor 3-level response surface experiment. The results indicated that the maximum yield of 5-HMF of 17.85 mg（5-HMF）/g（TR） prepared from the tea residue was obtained under optimized conditions including catalyst bulk content of 0.0150 g, the reaction temperature of 140 oC, the material-to-solvent ratio of 2000：1（mg/L）, and the catalysis time of 35 min. The production of 5-HMF from tea residue by FePO4 catalyst is a promising route of efficient utilization of tea residue.