Patent ID: 8568687

Claim:
A method of manufacturing a solid acid catalyst comprising the steps of: preparing a raw material containing: a) tetrapropylammonium bromide as a template agent, b) ketone having a formula of R 14 COR 15 , where R 14 and R 15 are alkyl groups, and CO is carbonyl group, c) a silicon-containing inorganic compound selected from at least one of a waste optical fiber, a waste powder of silicon dioxide produced in manufacturing of the optical fiber, and a waste silica glass, d) an aluminum-containing inorganic compound, e) water, wherein the weight ratio of water is between 2 and 50 with respect to the weight of the silicon in the raw material, and f) sodium hydroxide, wherein the weight ratio of sodium hydroxide is between 0.01 and 1 with respect to the weight of the silicon in the raw material; adjusting the weight ratio of silicon dioxide to aluminum oxide in the raw material to be at least 1,000; heat treating the raw material at a temperature of between 100-250 degrees C. in a closed chamber to form an intermediate substance and heat treating the intermediate substance at a temperature of at least 500 degrees C. in an atmosphere containing oxygen to thereby produce a solid acid catalyst of particles having diameters between 1 and 12 μm that produces an X-ray diffraction pattern of a ZSM-5 type zeolite, wherein the weight ratio of the ketone is 0.01-5 with respect to the weight of the silicon in the raw material.