| 摘要 |
PURPOSE:To dewax efficiently a hydrocarbon fraction and to lower pour point, by bringing the hydrocarbon fraction in the presence of hydrogen into contact with a catalyst composed of a mixture of a mordenite type zeolite and a specified pentacil type zeolite. CONSTITUTION:A mordenite type zeolite is uniformly mixed with a pentacil type zeolite having an X-ray diffraction pattern (S being intense, VS being very intense, M being medium intense) shown in Table. The monovalent alkali metal ion of the resulting zeolite mixture powder is subjected to an ion exchange treatment with hydrogen ion or ammonium ion to thereby convert it into an acid type. Pref. further a binder such as alumina sol is added thereto and the mixture is shaped into a particle having the desired size, dried and calcined to obtain a catalyst. A hydrocarbon fraction such as gas oil or kerosene is brought into contact with the catalyst in the presence of hydrogen at 200-500 deg.C to dewax it.
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