METHOD FOR PREPARING ZSM-5 ZEOLITE

• Main Authors: KANG, Na Young, PARK, Yong Ki, LEE, Yu Jin, KIM, Chang Hwan
• Format: Patent
• Language: English; French; Korean
• Published: 12.12.2019
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The present invention relates to a method for preparing ZSM-5 zeolite. The present invention can provide a method for preparing ZSM-5 zeolite comprising the steps of: preparing a first solution in a solution state by heating a mixture comprising a silica source, an alumina source, a neutralizing agent and a crystalline ZSM-5 nucleus; preparing a reaction mother liquid by mixing a second solution comprising salts into the first solution; and continuously crystallizing by continuously supplying the reaction mother liquid to a hydrothermal synthesis reactor, wherein formula [1] below is satisfied. Formula [1] 0.20≤Wa/Wb≤0.40 La présente invention concerne un procédé de préparation de zéolite ZSM-5. La présente invention peut fournir un procédé de préparation de zéolite ZSM-5 comprenant les étapes consistant à : préparer une première solution dans un état de solution par chauffage d'un mélange comprenant une source de silice, une source d'alumine, un agent neutralisant et un noyau cristallin ZSM-5; préparer un liquide mère de réaction en mélangeant une seconde solution comprenant des sels dans la première solution; et cristalliser en continu en fournissant en continu le liquide mère de réaction à un réacteur de synthèse hydrothermique. Dans ledit procédé, la formule [1] suivante est satisfaite: 0.20≤Wa/Wb≤0.40 ZSM-5계 제올라이트의 제조방법에 관한 것으로, 실리카 원, 알루미나 원, 중화제, 및 결정성 ZSM-5 핵을 포함하는 혼합물을 가열하여 용액 상태의 제 1 용액을 제조하는 단계; 상기 제 1 용액에 염을 포함하는 제 2 용액을 혼합하여 반응모액을 제조하는 단계; 및 상기 반응모액을 수열합성반응기에 연속적으로 공급하여 연속결정화하는 단계;를 포함하고, 하기 식 1을만족하는 ZSM-5계 제올라이트의 제조방법을 제공할 수 있다. [식 1] 0.20≤Wa/Wb≤0.40