Method for continuously preparing 2-hydroxy-benzonitrile by taking salicylamide as raw material

• Main Authors: JIANG SHIFENG, WANG XICHENG, ZHANG SHAOCHUN, LIU XIAORAN, MOU XINDONG
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2024
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a method for continuously preparing 2-hydroxy-benzonitrile by taking salicylamide as a raw material and a biomass catalyst used in the method, and the method comprises the following steps: 1) adding a catalyst into a continuous reactor, heating to a catalyst activation temperature of 300-600 DEG C in an inert atmosphere, keeping for 1-6 hours, and adjusting to a reaction temperature of 160-450 DEG C; and 2) keeping the reaction pressure in the continuous reactor at 0.1-3 MPa, and introducing the raw materials into the reactor for reaction. According to the method for continuously preparing 2-hydroxy-benzonitrile, continuous production can be achieved, the efficiency is high, and the used catalyst is high in activity, good in stability and long in service life. 本申请公开了一种由水杨酰胺为原料连续制备水杨腈的方法以及该方法中使用的生物质类催化剂，所述方法包括：1)在连续式反应器中加入催化剂，在惰性气氛中升温至300-600℃的催化剂活化温度并保持1-6h后调至160-450℃的反应温度；2)保持连续式反应器中反应压力为0.1-3MPa，将原料通入反应器中进行反应。根据本发明的连续制备水杨腈的方法可连续生产，效率高，其使用的催化剂活性高，稳定性好，寿命长。