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我公司 40 kt/a硫酸装置,采用“文”“泡”“电”水洗流程,净化污水含H2SO4、SO2(折H2SO4)0.17%,净化收率98.3%。净化污水中所含H2SO4、SO2(折 H2SO4)全部损失,共计 680吨( 40kt×0.17%)。 我厂原电雾聚集液随“文”、“泡沫塔”的污水,经石灰乳中和、澄清后排放,既浪费资源,又污染环境。1硫酸生产的污水组成 (1)污水来源 ①文氏管洗涤炉气后的污水,溶解SO3、SO2生成H2SO4、H2SO3,吨酸排放4吨污水中含H2SO4、H2SO30.1%~0.2%… 相似文献
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针对铝型材加工业产生的含F^-,Ni^2+酸性废水,用石灰作沉淀剂,通过化学沉淀法,控制溶液pH值,投加80mg/L的聚合氯化铝作为混凝剂,80mg/L的聚丙烯酰胺作为絮凝剂,通过沉淀分离出有害物。出水pH值6 ̄9,SS去除率98%以上,COD去除率80%以上,F^-去除率33%以上,Ni^2+去除率99%以上。 相似文献
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以我国煤矿酸性水的水质特征作为依据,研究了石灰石曝气流化床处理酸性水的新工艺。实验结果表明,该工艺具有较高的中和效率,处理后出水pH值达到排放标准,当原水Fe^2+含量不高于70.0mg/L时,出水Fe^2+,含量小于0.5mg/L,对SO^2-4的去除率不高于40%。 相似文献
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利用化工厂副产粗对硝基苯甲酸 ,皂化、脱色制得精对硝基苯甲酸 ,含量可达98%~99%(质量分数)。作为皂化碱组份 ,经过4种碱组份筛选 ,以15 %NH4HCO3 溶液在以 pH8~9控制加入量时获得最佳的色泽、得率及熔程。以粗对硝基苯甲酸的25%量的活性炭作为脱色剂 ,脱色后得到透明橙黄色溶液。用2mol/LH2SO4 中和至pH值2~3,过滤、干燥(120~140℃ ,2h)得对硝基苯甲酸精品。外观 :浅黄色粉末或针状晶体 ,含量≥98 % ,水份≤0 8 % ,三废达国家排放标准。皂化中和法精制粗对硝基苯甲酸@仇立干$盐城… 相似文献
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使用部分Dg50瓷质填料在水-空气实验系统中测得的填料塔液泛气速和压力降,根据所确定的液泛气速,压力降的计算方法,推算出93%H2SO4-空气93%H2SO4-SO2烟气,98%H2SO4-SO3烟气等操作系统中,填料塔采用不同填料的液泛气和压力降。 相似文献
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石灰石曝气流化床处理煤矿酸性矿井水的研究 总被引:2,自引:0,他引:2
以我国煤矿酸性水的水质特征为依据,研究了石灰石曝气流化床处理酸性水的新工艺。实验结果表明,该工艺具有较高的中和效率,处理后出水pH值达到排放标准,当原水Fe2+含量不高于70.0mg/L时,出水Fe2+含量小于0.5mg/L。对SO42-的去除率不高于40%。 相似文献
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以CoSO4作催化剂、KH2PO4-NaOH缓冲溶液控制pH值,用Na2SO3水溶液-空气氧化法测定了SK10和SK25静态混合器的有效表面及SK25静态混合器的液相传质系数,并得出有效表面和传质系数的关系式。 相似文献
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苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况,合成乙苯,苯乙烯所用的催化剂种类,并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。 相似文献
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《国际聚合物材料杂志》2012,61(1-4):113-122
Abstract Kinetics and mechanisms of oxidation of 6 acetals by molecular oxygen and ozone in liquid phase have been studied. Reaction with molecular oxygen (70°C, 15–16 hr) leads to the formation monoethers of the corresponding glycols with 68–90% selectivity. Salts of metals and complexes with crown-ethers have increased the reaction rate significally. Ozone have reacted with acetals with formation similar products. The mechanisms of intermediate stages have been proposed. 相似文献
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The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu3Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu3Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters. 相似文献
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责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体. 相似文献
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对用甘油锌作光稳定剂的光稳定作用进行了测试,并与光稳定剂NBC,BZ进行了比较。研究了甘油锌,NBC和BZ与双酚A的复配效果。研究结果表明,甘油锌是一种性能优良的光稳定剂。 相似文献
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Antioxidative activity and phenolic composition of pilot-plant and commercial extracts of sage and rosemary 总被引:5,自引:0,他引:5
Marie-Elisabeth Cuvelier Hubert Richard Claudette Berset 《Journal of the American Oil Chemists' Society》1996,73(5):645-652
Eight sage (Salvia officinalis) and twenty-four rosemary (Rosmarinus officinalis) extracts, originating from pilot-plant or commercial sources, had different antioxidative activities as measured by accelerated
autoxidation of methyl linoleate. Twenty-seven compounds were characterized in the Labiatae family extracts by high-performance
liquid chromatography (HPLC) coupled with mass spectrometry, equipped with an atmospheric pressure chemical ionization interface,
and by HPLC coupled with a photodiode array spectrophotometer. Twenty-two compounds were identified, including phenolic acids,
carnosol derivatives, and flavonoids. The extracts showed great variation in their HPLC profiles, and no correlation was apparent
between their antioxidative efficiency and their composition, in twenty specific phenols. Data indicated that the most effective
compounds were carnosol, rosmarinic acid, and carnosic acid, followed by caffeic acid, rosmanol, rosmadial, genkwanin, and
cirsimaritin. 相似文献