Patent ID: 8013130
Filing Date: 2011-09-06
Classification: B01J,C01B,C07C

Abstract:
1. A carbon-based solid acid obtained by carbonization of an organic substance and by sulfonation after completion of carbonization, and having a reduction rate of 10 mol % or less of acid content caused by immersing the solid acid in hot water of 120° C. for 2 hours, wherein the carbonization is performed in inert gas atmosphere at 250 to 600° C. for 1 to 50 hours and the sulfonation is performed at 100 to 450° C. for 0.5 to 30 hours, the peak intensity ratio D/G of D-peak to G-peak for the carbon-based solid acid in Raman spectroscopy is 0.5 or more and less than 1.0; and wherein the organic substance comprises lignin as a main component.