| abstract |
The present invention provides a solid acid catalyst developing high activity and exhibiting high durability in various organic reactions. That is, the present invention provides a solid acid catalyst having the structure (A) in which a hydrogen atom is eliminated from at least one of OH groups contained in an inorganic phosphorus acid, the structure (B) in which a hydrogen atom is eliminated from at least one of OH groups contained in an organic phosphorus acid represented by the formula (1) or (2) and at least one metal atom (C) selected from aluminum, gallium and iron and a method for producing an ester, a ketal or an acetal by using the solid acid catalyst;wherein each of -R1 and -R2 is selected from -R, -OR, -OH and -H in which at least one of -R1 and -R2 is -R or -OR, given that -R is an organic group having 1-22 carbon atoms. |