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Position: Home > Articles > Optimal Technical Conditions of Preparing Potassium Pyrophosphate from C. cathayensis Exocarp Nonwood Forest Research 2008,26 (3) 51-56

山核桃外果皮制备焦磷酸钾工艺条件的筛选

作  者:
陈向明;李军;唐龙华;汪四美
单  位:
合肥学院生物与环境工程系;合肥学院《合肥学院学报》编辑部;甘肃农业大学
关键词:
经济林学;山核桃外果皮;AAS;焦磷酸钾;化学合成法;中和与聚合反应
摘  要:
为了综合开发利用山核桃外果皮,为山核桃产区生态环境的保护提供参考,经原子吸收分光光度法(AA S)分析得知:山核桃外果皮的无机成分中含有较高的钾元素,山核桃外果皮可以作为制备工业钾盐的原料,湿消化法和干消化法处理外果皮所得的结果基本一致。以山核桃外果皮消化后的灰分为原料,采用化学合成法对制备焦磷酸钾的工艺条件进行了研究。单因素试验的结果表明,制备焦磷酸钾的最佳工艺条件是:灰分与磷酸质量比为2.24∶1~2.30∶1,中和反应pH值为9.0,磷酸氢二钾聚合温度为500℃,聚合时间1.5 h,焦磷酸钾含量可达97%以上。
译  名:
Optimal Technical Conditions of Preparing Potassium Pyrophosphate from C. cathayensis Exocarp
作  者:
CHEN Xiang-ming1,2a,LI Jun 2b,TANG Long-hua 2a,WANG Si-mei 2a (1.College of Agronomy,Gansu Agricultural University,Lanzhou 730070,Gansu,China;2a.Department of Biological and Environmental Engineering;b.Editorial Department of Journal,Hefei University,Hefei 230022,Anhui,China)
关键词:
nonwood forest science;C.cathayensis exocarp;AAS;potassium pyrophosphate;chemical synthesis method;neutralization reaction and polymerization
摘  要:
In order to comprehensively develop and utilize C.cathayensis exocarp and provide reference for protection of ecological environment at growing districts of C.cathayensis,inorganic constituents in C.cathayensis exocarp were analyzed by atomic absorption spectrometry.The results showed that content of K element in C.cathayensis exocarp was high,and the results of wet digestive and dry digestive methods were same.So C.cathayensis exocarp could be used to synthesize potassium pyrophosphate.Some technical conditions of preparing pyrophosphate potassium were studied by chemical synthesis method.The optimal technical conditions were obtained by some single-factor experiments.The content of pyrophosphate potassium could be up to 97% under the optimal technical conditions,that was,the mass ratio of ash to phosphoric acid 2.24∶1-2.30∶1,pH 9.0 in neutralization reaction,and polymerization at 500 ℃ for 1.5 h.

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