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新近,美国马萨诸塞州同意了关于限制儿童用品及其他消费品中某些阻燃剂含量的提案。提案主要内容为:12岁以下儿童产品和住宅软垫家具中磷酸三(2氯乙基)酯(TCEP)、磷酸三(2-氯丙基)酯(TCPP)、磷酸三(1,3-二氯异丙基)酯(TDCPP)的含量不能超过50ppm;消费品中十溴二苯醚、八溴二苯醚和五溴二苯醚等多溴联苯醚的含量不能超过0.1%。 相似文献
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吕兴军 《中国石油和化工标准与质量》1993,(12)
<正> 食品添加剂盐酸和漂粉精标准工作方案已由部技术归口单位确定下来。食品添加剂盐酸标准拟参照采用ΓOCT857-88《工业合成盐酸》,设总酸度、铁、硫酸盐、游离氯及溴、灼烧残渣、重金属和砷9个检验项目。漂粉精标准拟分两类,其钙法漂粉精参 相似文献
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一、前言氯乙烯合成过程,原料氯化氢中游离氯遇乙炔生成爆炸性产物并伴随大量反应热,严重危协生产安全;同时,氯乙炔压缩时分解物是造成精馏系统腐蚀的主要原因之一。为此,生产上严格控制氯化氢中游离氯不允许超过0.002%。依旧工艺氯化氢用硫酸干燥,再以活性炭吸附游离氯作安全措施。采用混合脱水新工艺后, 相似文献
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The effect of halogen based disinfectants including monochloramines (NH2Cl), free chlorine (HOCl/OCl−), and free oxidants (mixture of HOCl/OCl− and HOBr/OBr) on polyamide membrane was studied in synthetic Ocean seawater. Formation and stability of these oxidants were also examined. Permeability and salt rejection of flat sheet polyamide RO membranes following exposure to the halogen based oxidants were compared to the baseline performance of unexposed membranes. The ratio between free chlorine and free bromine was found to depend on the ratio between the bromides, naturally found in seawater, and the added chlorine. Bromide enhanced the degradation of monochloramines but did not affect the stability of free chlorine. All the oxidants damaged the polyamide membranes studied while the free oxidants appeared to be the most aggressive. 相似文献
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有机溴杀菌剂工业应用效果与评价 总被引:4,自引:0,他引:4
通过工业应用试验,表明有机溴杀菌速度快,对粘泥有较好的剥离效果,和水稳剂有良好的协同效应,费用低,投加方便,加氯的同时定投加有机溴是碱性条件下一种有效的杀生方案。 相似文献
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Plastic materials are the main sources of chlorine in solid recovered fuels (SRF). Chlorine is attributed to be the main initiator of slagging, fouling and corrosion in biomass and waste combustion as it lowers the melting point of ash forming matter and reacts chemically with the heat transfer surface steels. SRF may also contain sources of bromine in the form of brominated flame retardants (BFRs) applied in many plastics and textiles. Results presented in this paper from an experimental campaign at an 80 MWth bubbling fluidised bed (BFB) boiler show that bromine is behaving in a similar manner as chlorine: bromine was found at the corrosion front in boiler membrane wall tubes, and as water soluble salts in aerosol samples collected from the furnace and electrostatic precipitator (ESP) ash. It is evident from these results and the data in the literature that most of the salts of bromine are, by both their fate and physical and chemical properties, similar to those of chlorine. It can be concluded that it if there is a source of bromine in the fuel corrosive high vapour pressure bromides can be formed analogously to chlorides. 相似文献
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采用荧光波长色散法测定石油及其产品中氯和溴,通过建立标准曲线,测量几种样品中氯和溴含量。方法的精密度RSD1%,在样品浓度氯和溴含量很低的情况下,氯元素的回收率仍达76.72%~104.78%,溴元素的回收率高达84.22%~101.32%。所以该法可直接取样测定,影响因素较少,适合于快速、准确测定石油及其产品中氯和溴。 相似文献
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聚合氯化硫酸铁是一种新型高效无机高分子水处理剂,其制备方法包括氯酸盐氧化法和氯气氧化法,即硫酸亚铁溶液在一定温度和酸度下与氯酸钠或液氯反应,生成一系列不同聚合度的聚铁溶液,温度、酸度和氧化剂都可影响其聚合度,不同产品用于水处理时效果也相差甚远.氯酸盐氧化法制备聚合氯化硫酸铁与氯气氧化法相比在成本和环保方面都占优,该方法代表了聚合氯化硫酸铁的工业生产方法. 相似文献
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采用氧弹法、浸提-氧弹法和管式炉-氧弹法分别测定生活垃圾组分中的总氯、无机/有机氯以及挥发态/固定态氯的含量,探究了生活垃圾中氯的形态和在热处理过程中的转化规律。结果表明,生活垃圾各组分的总氯含量(干基)为1.52~19.44 mg/g,其中,厨余类组分的氯含量最高,为8.38~19.44 mg/g。厨余类组分的无机氯含量占比高达90%以上,橡塑类组分的有机氯含量占比为46%~55%。热处理过程中,无机氯在空气气氛下更易转化成挥发态氯和固定态氯,在氮气气氛下更易转化成固定态氯和其他态氯;而有机氯则主要转化成挥发态氯。揭示生活垃圾各组分的氯形态及其在热处理过程中的转化规律,可以为生活垃圾热处理过程烟气处理和氯腐蚀控制提供理论依据和解决思路。 相似文献