Environmentally Benign Immobilized Organometallic Acids

对环境无害的固定化有机金属酸

• 批准号: 9401572
• 负责人: John Gladysz
• 金额: $ 33万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-15 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9401572&HistoricalAwards=false
• 关键词: Environmentally; Benign; Immobilized; Organometallic; Acids

In this Environmentally Benign Chemical Synthesis and Processing project, supported by the Inorganic, Bioinorganic and Organometallic Chemistry Program, academic chemist, Professor John Gladysz of the University of Utah and industrial chemist, Dr. Istvan Horvath of Exxon Corporate Research Laboratory will undertake the development of new solid acid catalysts. These acid catalysts will be based upon protic organometallic compounds immobilized on solid polymeric supports such as polystyrene and Nafion. It is expected that these acids will exhibit new modes of reactivity that will involve both the acidic proton and the metal center. Success in these endeavors could result in processes that produce less acidic wastes than current methods. Immobilization of the organometallic acids will require the development of new ligands and methods for attaching them to the polymeric supports. Polystyrene will be derivatized with fluorinated polydentate organophosphine or cyclopentadienyl ligands, which will be used to bind metal hydride species. Alternative systems will be based upon Nafion, which has been derivatized at the sulfonamide group with donor groups such that metal hydride species can be covalently bound. New compositions will be characterized by infrared and NMR spectroscopies, by measurements of Hammett acidities, and by screening for catalytic activity in alkylation reactions such as those that are required for petroleum feedstock conversions. The majority of known industrial chemical manufacturing processes involve some type of catalysis. A large number of these catalytic processes involve the use of strong acids. Those that employ soluble acids often generate large quantities of highly acidic waste that must be treated to reduce its acidity prior to disposal. New solid-phase acids that may replace these are highly desirable. This project undertakes fundamental studies of new materials that ultimate provide the basis for more environmentally benign manufacture o f important commodity chemicals.

在这个环境友好的化学合成和加工项目中，由无机，生物无机和有机化学计划支持，学术化学家，犹他州大学的John Gladysz教授和工业化学家，埃克森公司研究实验室的Istvan Horvath博士将负责开发新的固体酸催化剂。 这些酸催化剂将基于固定在固体聚合物载体如聚苯乙烯和Nafion上的质子有机金属化合物。 预计这些酸将表现出涉及酸性质子和金属中心的新的反应模式。 这些努力的成功可能会导致产生比目前方法更少的酸性废物的过程。 有机金属酸的固定化需要开发新的配体和将它们连接到聚合物载体上的方法。 聚苯乙烯将用氟化多齿有机膦或双膦配体衍生化，其将用于结合金属氢化物物质。 替代系统将基于Nafion，其已在磺酰胺基团处与供体基团衍生化，使得金属氢化物物质可共价结合。 新的组合物将通过红外和核磁共振光谱表征， 通过测量Hammett酸度和通过筛选烷基化反应如石油原料转化所需的那些中的催化活性。 大多数已知的工业化学品制造工艺涉及某种类型的催化。 这些催化方法中的大量涉及强酸的使用。 使用可溶性酸的那些通常产生大量的高酸性废物，这些废物必须在处置之前进行处理以降低其酸度。 可以替代这些的新的固相酸是非常需要的。 该项目进行新材料的基础研究，最终为重要商品化学品的更环保的制造提供基础。