Environmentally acceptable benzyl alcohol-hydrogen peroxide chemical depainting agents

Freddie E. Hall Jr.
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Abstract

The Oklahoma City Air Logistics Center (OC-ALC) has historically used large amounts of methylene chloride/phenol-based chemical strippers to depaint aircraft. EPA has targeted these chemical depainting agents for elimination. For years, OC-ALC engineers have been aggressively evaluating environmentally acceptable (EA) chemical strippers for replacing methylene chloride and phenol. One of the more promising is a benzyl alcohol-hydrogen peroxide two part chemical depainting agent. Recently, there have been a number of concerns. Upon mixing the benzyl alcohol-hydrogen peroxide chemical stripper, it is theorized that a targeted hazardous air pollutant (i.e., phenol) is generated, thereby violating the NESHAP (National Emission Standard for Hazardous Air Pollutants) requirement. In addition, there is concern of a potential explosion hazard when mixing hydrogen peroxide. This article addresses the potential concerns by conducting both a literature search to evaluate potential problems (i.e., health concerns, explosive hazards, chemical stability, chemical reaction mechanisms/pathways, chemical reaction end- and by-products, etc.) and laboratory experiments to determine if phenol is produced as an end-product, by-product, or reaction step intermediate.

环境可接受的苯甲醇-过氧化氢化学脱漆剂
俄克拉荷马城航空物流中心(OC-ALC)一直使用大量的二氯甲烷/酚类化学脱漆剂来去除飞机的油漆。EPA已经针对这些化学脱漆剂进行了清除。多年来,OC-ALC的工程师们一直在积极评估环境可接受(EA)化学脱硝剂,以取代二氯甲烷和苯酚。其中比较有前途的是苯甲醇-过氧化氢两组分化学脱漆剂。最近,出现了一些担忧。在混合苯甲醇-过氧化氢化学汽提剂后,理论上会产生一种目标有害空气污染物(即苯酚),从而违反NESHAP(国家有害空气污染物排放标准)的要求。此外,在混合过氧化氢时还存在潜在的爆炸危险。本文通过文献检索来评估潜在问题(即健康问题、爆炸危险、化学稳定性、化学反应机制/途径、化学反应最终产物和副产物等),并通过实验室实验来确定苯酚是作为最终产物、副产物还是反应步骤中间体产生的,从而解决了潜在的问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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