SUPPORTED SOLID SUPER ACIDIC CATALYST, PREPARATION METHOD THEREFOR AND USE THEREOF, AND PREPARATION METHOD FOR ETHOXYLATED TRIMETHYLOLPROPANE

摘要

The present invention provides a supported solid super acidic catalyst, a preparation method therefor and use thereof, and a preparation method for ethoxylated trimethylolpropane. The catalyst comprises a carrier and an active ingredient supported on the carrier, the active ingredient is a sulfide metal oxide, and the sulfide metal oxide comprises a metal oxide and a sulfate radical coordinated and adsorbed on the metal oxide; the carrier is a layered clay; and the mass of the active ingredient is 25-75% of the mass of the carrier. In the present invention, the supported solid super acidic catalyst as a catalyst, trimethylolpropane as an initiator, and ethylene oxide undergo ring-opening polymerization to prepare ethoxylated trimethylolpropane. The results show that the yield of the ethoxylated trimethylolpropane is ≥78% (up to 88.4%), the selectivity is ≥85% (up to 95%), and the catalyst is easily separated from the product, does not corrode equipment, has low environmental pollution, is easy to regenerate, and is recyclable and good in cycle stability; and after 7 cycles, the yield of the product remains at least 75%.