Reaction Pathways of Aldehyde - and Ketone-Acid Site Complexes in Zeolites

摘要本研究的目的是在沸石的酸位上合成位点定位的有机分子，如共轭醛和酮、亚胺、缩醛、氰醇和氯酮。醛类和酮类被吸附并暴露在活性蒸气中。用碳-13魔角核磁共振和红外光谱对表面物质进行了分析。合成了沸石催化剂，并用硅-29和铝-27核磁共振、x射线衍射和吸附测量对其进行了表征。本研究中形成的化合物是目前使用液体酸催化剂生产的典型化学中间体。环境方面的考虑正迫使生产商转向固体酸催化剂，例如本研究中使用的那些催化剂。＊＊＊

ABSTRACT CTS-9520920 The objective of this effort is to synthesize site-localized organic molecules such as conjugated aldehydes and ketones, imines, acetals, cyanohydrins, and chloroketones, at the acid sites in zeolites. Aldehydes and ketones are adsorbed and exposed to reactive vapors. Surface species are analyzed with carbon-13 magic-angle nuclear magnetic resonance and infrared spectroscopy. Zeolite catalysts are synthesized and characterized with silicon-29 and aluminum-27 nuclear magnetic resonance, X-ray diffraction, and sorption uptake measurements. The compounds formed in this study are typical chemical intermediates that are presently produced using liquid acid catalysts. Environmental considerations are forcing producers to shift to solid acid catalysts, such as those used in this study. ***