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硝酸钾既是一种重要的工业原料,又是优质无氯钾、氮复合肥料,植物营养素钾、氮总的质量分数可达60%左右,具有良好的物理化学性质,是发展现代高效农业不可缺少的化肥品种。由于生产、市场、价格等方面的原因,目前我国对农作物施用的硝酸钾较少,而这种称为世界紧缺的“绿色钾肥”在欧洲国家较为盛行,环保“绿色钾肥”将成为硝酸钾的一个新卖点。伴随着高科技农业的不断发展,以及人们对食品安全要求的不断提高,国内市场上对硝酸钾的需求将不断增加,具有一定的市场空间,不过目前这一市场仍过于狭窄。简要介绍硝酸钾的生产技术、国内现状、应用领域及市场前景,并对硝酸钾的发展提出了一些建议。 相似文献
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用萃取结晶法新工艺生产硫酸钾,整个反应过程实现全闭路循环,并且无结盐堵塞问题。产品质量好,萃取剂损失少,是一种值得推荐的新工艺。 相似文献
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硫酸钾作为一种新型、优质的农业肥料,近年来被迅速普及和应用。随着我国农业科技含量的提高和新型农业的不断发展,农业用肥的生产技术和发展前景也成为了人们关注的重点。本文就主要针对硫酸钾肥发展中存在的问题,提出相应的措施,同时对其发展前景进行展望。 相似文献
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目的探讨阿莫西林克拉维酸钾片联合野菊花注射液雾化吸入治疗小儿化脓性扁桃体炎患儿的临床效果。方法选取2018年10月至2019年10月江门市新会区司前人民医院收治的80例化脓性扁桃体炎患儿作为研究对象,依据随机数字表法分为两组,各40例,对照组予以野菊花注射液雾化吸入治疗,观察组在对照组基础上加用阿莫西林克拉维酸钾片治疗。比较两组临床疗效、治疗前后C反应蛋白(CRP)、白细胞计数(WBC)及中性粒细胞百分比(NE)水平及临床症状改善时间。结果观察组患儿治疗有效率明显高于对照组,差异有统计学意义(P<0.05);治疗前,两组CRP、WBC以及NE指标比较,差异无统计学意义(P>0.05);治疗1周后,两组患儿CRP、WBC及NE指标显著下降,且观察组低于对照组,差异有统计学意义(P<0.05);与对照组比较,观察组患儿咽痛改善、扁桃体肿大改善、体温恢复正常以及脓点或脓苔消失时间较短,差异有统计学意义(P<0.05)。结论化脓性扁桃体炎患儿采用阿莫西林克拉维酸钾片联合野菊花注射液雾化吸入治疗效果显著,可提高治疗有效率并减轻炎症反应,改善临床症状,利于患儿获得良好预后。 相似文献
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碳酸钾生产工艺中,除氨的不彻底一直是困扰厂家的一大难题.本文介绍一种吹脱除氨的新工艺.实验从温度、吹脱时间、吹脱气量、气相压力等方面进行了研究.结果表明,实验条件下,溶液温度、吹脱时间、吹脱气量和气相压力对NH4HCO3分解影响显著.合理的除氨工艺参数为:离子交换液温度343 K;吹脱时间1.5 h;吹脱气量0.1 m3/h;真空度为0.03MPa. 相似文献
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Ameet Bakhai Eirini Palaka Cecilia Linde Hans Furuland Lei Qin 《Journal of medical economics》2013,16(12):1172-1182
AbstractAims: Patients with heart failure are at increased risk of hyperkalemia, particularly when treated with renin-angiotensin-aldosterone system inhibitor (RAASi) agents. This study developed a model to quantify the potential health and economic value associated with sustained potassium management and optimal RAASi therapy in heart failure patients.Materials and methods: A patient-level, fixed-time increment stochastic simulation model was designed to characterize the progression of heart failure through New York Heart Association functional classes, and predict associations between serum potassium levels, RAASi use, and consequent long-term outcomes. Following internal and external validation exercises, model analyses sought to quantify the health and economic benefits of optimizing both serum potassium levels and RAASi therapy in heart failure patients. Analyses were conducted using a UK payer perspective, independent of costs and utilities related to pharmacological potassium management.Results: Validation against multiple datasets demonstrated the predictive capability of the model. Compared to those who discontinued RAASi to manage serum potassium, patients with normokalemia and ongoing RAASi therapy benefited from longer life expectancy (+1.38 years), per-patient quality-adjusted life year gains (+0.53 QALYs), cost savings (£110), and associated net monetary benefit (£10,679 at £20,000 per QALY gained) over a lifetime horizon. The predicted value of sustained potassium management and ongoing RAASi treatment was largely driven by reduced mortality and hospitalization risks associated with optimal RAASi therapy.Limitations: Several modeling assumptions were made to account for a current paucity of published literature; however, ongoing refinement and validation of the model will ensure its continued accuracy as the clinical landscape of hyperkalemia evolves.Conclusions: Predictions generated by this novel modeling approach highlight the value of sustained potassium management to avoid hyperkalemia, enable RAASi therapy, and improve long-term health economic outcomes in patients with heart failure. 相似文献
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天津市水土环境地球化学调查发现了大面积的富钾土地资源,该文利用调查数据圈定富钾土地资源区,并对其储量进行估算,目的是为保护和合理利用富钾土地资源提供科学依据.依据土壤全钾含量大于2.5%圈定了8个富钾土地资源区,主要分布在宁河-汉沽地区,其次分布在蓟县山区.蓟县富钾土地由富钾岩石风化形成,宁河-汉沽富钾土地形成与退海古泻湖有关.富钾土地资源区总面积约1303.17km2,耕植层(0~20cm)和0~100cm土体中估算全钾总储量分别为8 638.36t和47 327.65t. 相似文献
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研究了用硝酸铋代替硝酸银除去溶液中氯离子的新工艺。结果表明,用0.8kg硝酸铋相当于用0.5kg硝酸银的除氯效果。 相似文献