Reduction method and application of amination catalyst

• Main Authors: QIAO XIAOFEI, WEI CHENYE, HAO XIN, ZHANG CONGYING, HU SHUANG, REN SHUJIE, GAN XIAOYU, HUA YUNSONG
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2022
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a reduction method and application of an amination catalyst. The reduction method comprises the following steps: firstly, under an adiabatic condition, controlling the reduction degree of a catalyst by using reaction heat generated in a reduction process at a low temperature so as to realize reduction of active components of the catalyst; then, passivation is carried out under a constant-temperature condition, so that the purpose of improving the selectivity of the catalyst is achieved; and finally, deep reduction and ammonia modification of the catalyst are carried out to achieve the purpose of further improving the selectivity and stability of the catalyst, so that the problems of low activity and selectivity and poor stability of the catalyst are solved. 本发明公开一种胺化催化剂的还原方法及其用途。所述还原方法包括以下步骤：首先，在绝热条件下，利用低温下还原过程中产生的反应热控制催化剂的还原程度进而实现催化剂活性组分的还原；然后，在恒温条件下进行钝化，达到提高催化剂选择性的目的；最后，再进行催化剂的深度还原和氨改性，达到进一步提高催化剂选择性和稳定性的目的，从而解决催化剂活性和选择性低，稳定性差的问题。