Hydrogen peroxide obtained via direct synthesis as alternative raw material for ultrapurification process to produce electronic grade chemical

Abstract

BACKGROUND:The catalytic direct synthesis of hydrogen peroxide is a highly interesting alternative process to avoid the current anthraquinone route because implies significant sustainability improvements. Among all the peroxide applications, its use as electronic chemical requires very low metallic content. The employment of direct synthesis peroxide as raw material for ultrapurification process has not been investigated before, so its viability is still pending of evaluation. RESULTS:Although the improvements of the catalyst or reactor performances of the direct synthesis process were not defined as objectives of the work, a maximal peroxide concentration of 2.3% was obtained, which is a very good result considering the low pressure used. Some relationships between the measured metallic concentrations in the obtained chemical and the operation conditions have been very useful to identify the most important conditions (selection of appropriate quality for the chemicals and proper materials for the installation) to promote the production of hydrogen peroxide with low metallic content. The technical competitiveness of this alternative ultrapurification process was clearly demonstrated as the number of required membrane stages (from 1 to 6 depending on the product quality) is lower than the required one by the traditional case. Besides, the process can be considered economically viable if the direct synthesis peroxide can be produced with a total cost below 36.5 $/m 3 . CONCLUSION:Further investigation, specifically focused to holistic approaches, is still necessary in order to assess the total costs of hydrogen peroxide production by direct synthesis. This way, the current available information could be complemented and the competitiveness of this direct route to obtain hydrogen peroxide for electronic grade chemical production could be more clearly defined.

Recent Advances in the Direct Synthesis of Hydrogen Peroxide Using Chemical Catalysis—A Review

“…A major hindrance in the direct synthesis approach is the process' low selectivity, as the formation of H2O2 is not thermodynamically favoured. Although promoters such as H2SO4, H3PO4, NaBr, and KBr help enhance the selectivity of the process, one might consider the catalyst and its supporting material to be the most influencing parameter [81]. Furthermore, the presence of noble metals or noble metal alloys as catalysts aid in the hydrogenation and subsequent decomposition of [68] to produce H 2 O 2 directly from H 2 and O 2 in water in the presence of a commercial Pd/C catalyst (Scheme modified from Gallina et al [68], 2017, copyright 2017.…”

A metal-free catalyst for the efficient and stable one-step photocatalytic production of pure hydrogen peroxide

“…[1][2][3][4] Pure H 2 O 2 is mainly used in cleaning, etching of integrated circuits, silicon chips, imaging tubes and circuit boards in the electronics industry. 5,6 In addition, in the food processing industry, pure H 2 O 2 is mainly applied for sterilization and disinfection. [7][8][9][10] The production of pure H 2 O 2 is typically from purified and refined industrial-grade H 2 O 2 .…”

Bromide and Acids: A Comprehensive Study on Their Role on the Hydrogen Peroxide Direct Synthesis

“…The role of acidic and halide promoters has been thoroughly investigated in the literature − but without understanding the modification on the hydrogen peroxide reaction network: acids are added in the direct synthesis to retard base-catalyzed decomposition of hydrogen peroxide and halides are added to retard water production and increase hydrogen peroxide selectivity . It is therefore crucial to understand how they can modify the reaction mechanism network of the direct synthesis and how to adjust their amounts to optimize the process and to understand how to separate them in the final solution obtained . Despite the abundant work using the promoters, only recently there was an advancement on the understanding of their real effect.…”