4A molecular sieve as well as preparation method and application thereof

• Main Authors: QIAO YANHUI, KANG XINPING, LI YAN, CHEN HAOCONG
• Format: Patent
• Language: Chinese; English
• Published: 10.11.2020
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a 4A molecular sieve as well as a preparation method and application thereof. The 4A molecular sieve is prepared by a preparation method comprising the following steps: 1) deoiling, calcining, washing, pickling and drying spent bleaching clay generated by oil refining to obtain pretreated spent bleaching clay; 2) mixing the spent bleaching clay pretreated in the step 1) with alkali, and roasting the mixture to obtain an alkali fusion material; 3) mixing the alkali fusion material obtained in the step 2) with water, and adding an aluminum source to prepare a precursor solution; and 4) carrying out hydrothermal reaction on the precursor solution obtained in the step 3). The 4A molecular sieve can be used as a cationic adsorbent or a gas adsorbent. The molecular sieveis prepared from petroleum spent bleaching clay through hydrothermal synthesis, so that the method has the advantages of low production cost, simple process, good repeatability, low equipment requirement and convenience in in