PROCESS FOR PREPARING CATALYSTS FOR LIQUID-PHASE DEGRADATION OF WASTE POLYMER, AND CATALYTIC DEGRADATION PROCESS USING THE SAME

摘要

PURPOSE: Provided are preparation method of liquid phase degradation catalyst, a hydrogen exchanged MFI zeolite, for waste polymer and its polymer degradation method into low molecular hydrocarbons. The catalyst is prepared by treating zeolite in proper manner so that its surface area is increased, making the catalyst highly active and slowing down the carbon deposit. It degrades polymer fast into low molecular materials and increases the high yield of liquid products. CONSTITUTION: The preparation of catalyst comprises: making a synthetic mother liquid of 3-16(K2O, Na2O)0.25-1.0Al2O350-100SiO22150-3000H2O without an organic template; adding 0.5-4g of MFI zeolite, as a core, per kg of the above mother liquid and synthesizing at 175-205C for 1-3 days; and exchanging hydrogen by treating with 0.2-3N aqueous hydrogen chloride solution. The degradation device by the above MFI zeolite catalyst includes: delivery equipment of the reactant which slowly introduces, at a certain speed, molten polyolefin waste polymer heated, at the end of the hopper, to 200-350C into the batch reactor; a reactor stirring the reactant and the alkali treated zeolite at 50-500rpm and the temperature of its exterior wall is controlled within 2C; a final reactor which increases the yield of the liquid products and converts the olefin into aromatic compounds by filling in the gallium exchanged MFI or BEA zeolite; and a separator of liquid products which separates the products continuously into different grades by the two step separator of different temperatures.