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次氯酸钠溶液稳定性研究进展 总被引:7,自引:1,他引:7
评述了次氯酸钠水溶液稳定性的研究进展。次氯酸钠的不稳定性是由于次氯酸根离子价层电子对空间构型的高度不对称性和次氯酸根离子中阳离子Cl^+的高离子势所决定的。介绍了次氯酸钠分解反应的热力学性质和动力学性质;讨论了温度、溶液的pH、重金属离子、稳定剂对次氯酸钠水溶液稳定性的影响。指出降低次氯酸钠溶液的浓度,低温和避光储存,控制次氯酸钠溶液的酸度及添加稳定剂是提高次氯酸钠水溶液稳定性的有效途径。 相似文献
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次氯酸钠复配制剂的性能研究 总被引:2,自引:1,他引:1
对次氯酸钠水溶液的稳定性进行了实验观察,并进行了次氯酸钠溶液与各种表面活性剂、稳定剂复配物中的有效氯含量的测定,找出了保持次氯酸钠溶液稳定性的最佳条件,提出了保持其复配物稳定性的一些应用方法。依据试验,在6%(质量分数)的次氯酸钠溶液中加入稳定剂(溴化钾+8-羟基喹啉,质量比为1:1)、HY-4复配型表面活性剂的产品在25℃时储存5周内的分解率小于5%,而且在储存5周后的时间内每周的分解率会保持在0.1%以下。 相似文献
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次氯酸钠水溶液稳定性及增稠体系研究 总被引:10,自引:1,他引:9
研究了温度、pH值、金属离子和表面活性剂对次氯酸钠水溶液稳定性的影响。在 2 5℃以下 ,pH >12 4时次氯酸钠溶液较稳定 ;金属离子的存在促进其分解。并找到了能够在次氯酸钠中稳定存在的表面活性剂WC 2A1(十二烷基二苯醚二磺酸钠 )。同时对有效氯含量、非离子表面活性剂 (GMY)及阴离子表面活性剂 (L - 30 )、pH值对次氯酸钠水溶液黏度的影响作了研究 ,得出了所需黏度的配方 :w(GMY) =7%~ 8% ,w(L - 30 ) =2 %~ 3%。 相似文献
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次氯酸钠的分解特性及提高其稳定性能的途径 总被引:8,自引:0,他引:8
分析研究了次氯酸钠的分解特性,列举了次氯酸钠的不稳定现象,影响次氯酸钠稳定性的诸因素。通过对次氯酸钠稳定性能的测定,进而提出了提高次氯酸钠稳定性的措施:严格控制生产工艺条件;除去金属杂质:控制溶液的pH值,添加稳定剂及合理贮藏等。 相似文献
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次氯酸钠的分解特性及提高其稳定性性能的途径 总被引:6,自引:0,他引:6
分析了研究次氢酸钠的分解特性,列举了次氯酸钠的不稳定现象,影响次氯酸钠稳定性的诸因素。通过对次氯酸钠稳定性能的测定,进而提出了提高次氯酸钠稳定性的措施;严格控制生产工艺条件;除去金属杂质控制溶液的PH值,添加稳定剂及合理贮藏等。 相似文献
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为解决次氯酸钠溶液自发分解和贮存稳定性问题,向氨基磺酸钠和三聚磷酸钠溶液中加入工业次氯酸钠溶液,制得有效氯含量5.0%(质量分数)、氨基磺酸钠含量8.8%(质量分数)、三聚磷酸钠含量4.8%(质量分数)、游离氢氧化钠含量2.0%(质量分数)的稳定性次氯酸钠溶液。在稳定性快速评价试验中,次氯酸钠溶液在54 ℃下贮存14 d,有效氯下降率为12.6%,推定有效期可达12个月。氨基磺酸钠稳定剂的作用机理是氨基磺酸钠与次氯酸钠在溶液中通过共价作用形成了分子团,从而有效抑制次氯酸钠溶液的自发分解。 相似文献
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In this work, benzyl alcohol oxidation to benzaldehyde by sodium hypochlorite (NaOCl) in the presence of quaternary ammonium salt was successfully carried out in an organic solvent/aqueous solution two-phase medium. An aqueous solution of low pH value is found to be favorable for the oxidation of benzyl alcohol by sodium hypochlorite. However, certain amounts of hypochlorite ions are converted to chlorines in a solution of low pH value simply by adding sulfuric acid. It is thus our goal to find a method for the production of benzaldehyde of high yield in a solution at low pH value and the prevention of chlorine production from sodium hypochlorite. Therefore, the primary purpose of this work is to search for a favorable condition for the production of benzaldehyde. It is effective to adjust the pH value by adding KCl/HCl solution rather than by adding sulfuric acid solution. Under this circumstance, the reaction follows a zeroth order rate law. Kinetics of the oxidation by sodium hypochlorite under phase transfer catalysis condition, including the effect of the agitation speed, the amount of TBAB catalyst, quaternary ammonium salts, the amount of sodium hypochlorite, the amount of sodium hydrogen carbonate, organic solvents, the pH value, the amount of dichloromethane, and the temperature on the conversion were investigated in detail. Reasonable explanations were made to satisfactorily account for the results. 相似文献
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In this work, benzyl alcohol oxidation to benzaldehyde by sodium hypochlorite (NaOCl) in the presence of quaternary ammonium salt was successfully carried out in an organic solvent/aqueous solution two-phase medium. An aqueous solution of low pH value is found to be favorable for the oxidation of benzyl alcohol by sodium hypochlorite. However, certain amounts of hypochlorite ions are converted to chlorines in a solution of low pH value simply by adding sulfuric acid. It is thus our goal to find a method for the production of benzaldehyde of high yield in a solution at low pH value and the prevention of chlorine production from sodium hypochlorite. Therefore, the primary purpose of this work is to search for a favorable condition for the production of benzaldehyde. It is effective to adjust the pH value by adding KCl/HCl solution rather than by adding sulfuric acid solution. Under this circumstance, the reaction follows a zeroth order rate law. Kinetics of the oxidation by sodium hypochlorite under phase transfer catalysis condition, including the effect of the agitation speed, the amount of TBAB catalyst, quaternary ammonium salts, the amount of sodium hypochlorite, the amount of sodium hydrogen carbonate, organic solvents, the pH value, the amount of dichloromethane, and the temperature on the conversion were investigated in detail. Reasonable explanations were made to satisfactorily account for the results. 相似文献
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以不同浓度的硅酸钠、碳酸钠及二者混合物作稳定剂,研究它们对有效氯含量为0.5%(质量分数,下同)的次氯酸钠溶液化学稳定性的影响。测定稳定化处理后次氯酸钠溶液中有效氯的含量,结果表明:54 ℃下恒温密闭静置14 d后,加入硅酸钠、碳酸钠以及二者混合物作稳定剂的次氯酸钠溶液的有效氯,最高分别可保留初始浓度的88.16%、86.81%和92.85%;而不加任何稳定剂的次氯酸钠溶液在同样条件下其有效氯含量仅仅可保留初始浓度的76.58%。实验结果表明,硅酸钠和碳酸钠的混合物可以作为次氯酸钠溶液的良好稳定剂。 相似文献
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通过对有效氯含量的比较,本文考察不同的稳定剂硅酸钠、硼酸和氯酸钾等和表面活性剂BS-12、ALES和AES等对NaClO深水溶液的稳定性的影响,在pH值为12.5的条件下,加入2%的硅酸钠和1%的AES能较好地增加NaClO溶液的稳定性。 相似文献