MECHANISM OF THE OXIDATION OF AQUEOUS PHENOL WITH DISSOLVED-OXYGEN
MECHANISM OF THE OXIDATION OF AQUEOUS PHENOL WITH DISSOLVED-OXYGEN
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DOI：
10.1021/i100016a002
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发表时间：
1984-01-01
期刊：
影响因子：
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通讯作者：
HARRIS, IJ
中科院分区：
文献类型：
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作者：
DEVLIN, HR;HARRIS, IJ
1976年）。如果氧气被直接用作破坏废水沃茨中苯酚的一种手段，那么必须知道反应中间体和苯酚最终归宿的一些详细知识，以便清楚“处理过的”流出物中可能存在什么产物，以及如果必要的话，这种新的流出物本身可能如何处理。对反应途径的了解还提供了操纵氧化的可能性，以允许更完全地破坏苯酚，或者通过适当改变工艺条件来优先生产特定产物。以前对分子氧和苯酚在液相中的反应的研究，例如Sadana（1974），集中于证明苯酚能被氧破坏和测定苯酚和氧之间的反应速率。很少有人阐明苯酚被破坏的反应途径。一些工作者，包括古尔德和韦伯（1976年）和李等。（1979年）使用臭氧（03）氧化苯酚; Eisenhauer（1968年）建议将该反应用于处理含水废物。大多数使用臭氧氧化苯酚的工作都是在环境温度下进行的，因为即使在这些温度下臭氧也是一种强氧化剂。在高温下，水溶液中氧气参与化学反应的形式是复杂的。所需的升高的温度可导致氧自由基O·的形成，所述氧自由基O·又可与水和氧气反应以形成过氧化物H2 O2和臭氧O3，使得这四种物质O·、O2和O3以及H2 O2都能够参与苯酚氧化。苯酚氧化产物表I是已报道的由氧气和臭氧氧化苯酚的反应产物的总结。在两种氧化体系中都发现了一些化合物。仅推断存在粘康酸和富马酸，并且包括马来酸，因为
1976). If oxygen is to be used directly as a means of destroying phenol in waste waters, some detailed knowledge of the reaction intermediates and the ultimate fate of the phenol must be known so that it is clear what products may be present in the “treated” effluent and how this new effluent might itself be treated, if necessary. Knowledge of the reaction pathway also offers the possibility of the manipulation of the oxidation to allow more complete destruction of phenol or perhaps the preferential production of a particular product through appropriate variation of the process conditions. Previous investigations of the reaction between molec-ular oxygen and phenolin the liquid phase, for example by Sadana (1974), have concentrated on demonstrating that phenol can be destroyedby oxygen and measuring the rate of reaction between phenol and oxygen. Very little has been done to elucidate the reaction pathway by which the destruction of phenol occurs. Several workers, including Gould and Weber (1976) and Li et al.(1979), have used ozone(03) to oxidize phenol; Eisenhauer (1968) proposed the reaction be used for the treatment of aqueous wastes. The majority of work using ozone to oxidize phenol has been carried out at ambient temperatures, since ozone is a powerful oxidant even at these temperatures.At high temperatures in aqueous solutions, the form in which oxygen participates in chemical reactions is complex. The elevated temperatures necessary can lead to theformation of oxygen radicals, 0·, which in turn can react with water and oxygen to form peroxide, H202, and ozone, 03, so that these four species O·, 02, and 03, and H202 are all capable of participating in the phenol oxidation. Phenol Oxidation Products Table I is a summary of reaction products that have been reported from the oxidation of phenol by oxygen and ozone. Some compounds have been found in both oxida-tion systems. The presence of muconic and fumaric acids has only been inferred and maleic acid is included because