一种新型双氧水工作液再生剂的研制与再生效果及机理分析

发布时间：2018-07-09 11:25

本文选题：蒽醌法 + 双氧水　；参考：《湘潭大学》2016年硕士论文

【摘要】：双氧水作为一种重要的无机化工原料和精细化工产品,广泛应用于各个领域。蒽醌法以其相对成熟的工艺成为双氧水的主要生产方法,但是在其循环的生产过程中容易产生降解物,它们会引起工作液中物性的改变,使得工作液的黏度增加,表面张力下降,有效成分损耗以及系统阻力的增加,会对生产造成较大影响,最终导致产品质量下降。目前,国内大多数厂家采用氧化铝料球作为再生剂,将工作液中的降解物转化为有效蒽醌,稳定系统阻力,使整个工艺得到稳定运转,但随着双氧水的应用领域不断开拓,对双氧水产品的品质提出了越来越高的要求,特别是现有再生剂的使用寿命不长,再生效果易受操作条件波动的影响等。因此,制备出稳定性好,再生活性理想的新型再生剂具有十分重要的意义。本文首先提出了一种新型双氧水工作液再生剂的研制方法。该方法通过选取活性氧化铝、二氧化硅、氧化镁、氧化锌、二氧化锆、二氧化钛六种氧化物,对其进行两两组合,得到=15种不同组合,每种组合按照80:20、70:30、50:50、30:70、20:80的比例,制备了75种再生剂,制得的再生剂与双氧水工作液进行接触再生后,借助正相高效液相色谱分析测定工作液中有效蒽醌的含量变化。最终得出以Al_2O_3-MgO组合的再生剂再生性能最佳,采用该组合再生剂可使得工作液中有效蒽醌的含量增加1.86%~3.17%,而采用工厂氧化铝料球使有效蒽醌的含量增加1.06%,较传统工业使用的工厂氧化铝料球,工作液中的有效蒽醌增加0.80%~2.12%。其中以Al_2O_3-MgO=50:50组合的再生剂再生活性最高,使用其再生后的双氧水工作液中的有效蒽醌增加了3.17%。同时该再生剂具有良好的稳定性,在工作液中不易粉化,通过比较再生后工作液中有效蒽醌的相对含量得出,相较于工厂氧化铝料球该再生剂并未对双氧水工作液中有效蒽醌造成太多吸附。在该组合再生剂中,所采用活性氧化铝为g-Al_2O_3,属于立方晶系,氧化镁也属于立方晶系。通过查阅文献资料,对再生剂中的g-Al_2O_3以及MgO对工作液中有效蒽醌的再生机理进行了初步的推测。其次本文根据双氧水工作液的氢化降解和氧化降解机理以及工作液中被鉴定出的降解物,笔者对工作液中有效蒽醌的降解总反应作出可能性推测,绘出了有效蒽醌的降解反应总图。
[Abstract]:As an important inorganic chemical raw material and fine chemical product, hydrogen peroxide is widely used in various fields. The anthraquinone process has become the main production method of hydrogen peroxide with its relatively mature technology, but it is easy to produce degrading substances during the production process of its circulation, which will cause the change of the physical properties of the working fluid and increase the viscosity of the working fluid. In addition, the decrease of surface tension, the loss of effective components and the increase of system resistance will have a great influence on the production and eventually lead to the decline in the quality of the products. At present, most of the domestic manufacturers use alumina balls as regenerative agents to convert the degrading substances in the working fluid into effective anthracene quinones to stabilize the system resistance and make the whole process stable running, However, with the continuous development of the application field of hydrogen peroxide, the quality of the hydrogen peroxide product is becoming more and more high, especially the life of the regenerative agent is not long, the regeneration effect is easily affected by the fluctuation of the operating conditions. Therefore, the new regenerative agent, which has good stability and rejuvenation, is of great significance. A new method for the development of a new type of regenerator for hydrogen peroxide working liquid was proposed. By selecting active alumina, silica, Magnesium Oxide, Zinc Oxide, two zirconia and titanium dioxide, six kinds of oxides were combined to obtain different combinations of =15. Each combination was prepared according to the proportion of 80:20,70:30,50:50,30:70,20:80. After the regenerative agent was regenerated from the regenerative agent and the hydrogen peroxide working liquid, the content of the effective anthraquinone in the working liquid was determined by the positive phase high performance liquid chromatography. Finally, it was concluded that the regenerative agent of the Al_2O_3-MgO combined regenerative agent was the best. The combined regenerative agent could increase the content of the effective anthraquinone in the working fluid by 1.86%~3.. 17%, the content of the effective anthraquinone is increased by 1.06% by the factory alumina ball. The effective anthraquinone in the working liquid is increased by 0.80%~2.12%. compared with the traditional industrial aluminum oxide ball. The regenerative activity of the regenerative agent in the Al_2O_3-MgO=50:50 combination is the highest, and the effective anthraquinone in the regenerated hydrogen peroxide working fluid increases 3.17%.. The regenerated agent has good stability and is not easily powdered in the working fluid. By comparing the relative content of the effective anthraquinone in the regenerated working fluid, the regenerated agent does not make too much adsorption of the effective anthraquinone in the hydrogen peroxide working liquid compared to the factory alumina ball. In the regenerative agent, the active alumina is used to be g-Al_2O_3 It belongs to the cubic crystal system and the Magnesium Oxide is also a cubic crystal system. By consulting the documents, the regeneration mechanism of the effective anthraquinones in the regenerative agent is preliminarily speculated. Secondly, this paper is based on the hydrogenated degradation and oxidation degradation mechanism of the hydrogen peroxide working fluid and the degradation products identified in the working liquid, and the Magnesium Oxide is a pen. The possibility of the total reaction of effective anthraquinone degradation in the working fluid was predicted, and the general map of the effective degradation reaction of anthraquinone was drawn.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TQ123.6

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