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Use of the surface selective dealumination method and the surface of the zeolite zeolite was dealuminated
Use of the surface selective dealumination method and the surface of the zeolite zeolite was dealuminated
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机译:使用表面选择性脱铝法和将沸石表面脱铝
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摘要
PURPOSE: To enhance selectivity of a caprolactam product by bringing a specific zeolite into contact with dicarboxylic acid. ;CONSTITUTION: The zeolite having 0.1-50 α values and ≥1 constraint index is brought into contact with a 0.01-4 mol dicarboxylic acid solution at 15-93°C for more than 10 minutes until the dealumination of the whole is 50% and the surface acidity lowers at least 40%.;COPYRIGHT: (C)1994,JPO
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