Silicon-aluminum molecular sieve and preparation method thereof

• Main Authors: GUO CHENGYU, LI ZHAOFEI, GUO GUANGJUAN, PANG XINMEI, LI FAYONG, XING XIN, ZHANG ZHONGDONG, LIU QIWU
• Format: Patent
• Language: Chinese; English
• Published: 29.07.2022
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention provides a silicon-aluminum molecular sieve and a preparation method thereof. The preparation method comprises the following steps: step 1, preparing a solution containing an aluminum source as a solution A, and preparing a solution containing a silicon source as a solution B; step 2, taking one of the solution A and the solution B as a dispersed phase, taking the other one as a continuous phase, and dripping the dispersed phase into the flowing continuous phase through a hemispherical grid sheet to realize rapid mixing of the two phases; and step 3, crystallizing, filtering, washing and drying the two phases mixed in the step 2 to obtain the silicon-aluminum molecular sieve. The preparation of the nano silicon-aluminum molecular sieve with narrow particle size distribution and uniform element distribution is realized by utilizing a micro-mixing technology; the molecular sieve synthesized by the technology provided by the invention has the advantages of uniform particle size height, consistent m