Preparation method of bis(2,4-dicumylphenyl) pentaerythritol diphosphite

• Main Authors: TIAN JUNWEI, LIU YANG, LI ZHIGUANG, ZHU XUELIANG, SU MEINAN
• Format: Patent
• Language: Chinese; English
• Published: 18.01.2019
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The embodiment of the invention discloses a preparation method of bis(2,4-dicumylphenyl) pentaerythritol diphosphite. The preparation method comprises the following steps: dropwise adding phosphorus trichloride in pentaerythritol, an amines hydrochloride catalyst and an aromatic solvent under a micro decompression condition at the reaction temperature of -5 to 10 DEG C, then rising the temperatureto 85 to 90 DEG C by stages, carrying out decompression reaction for 1 hour, and filling nitrogen for protection after stopping decompression, thus obtaining a dichloro pentaerytritol diphosphite reaction solution; dropwise adding the dichloro pentaerytritol diphosphite reaction solution into a 2,4-dicumyl phenol aromatic solvent of which the temperature is risen to 90 to 100 DEG C, carrying outdecompression reflux reaction for one hour, introducing nitrogen, adding mixed amine for regulating the PH (Potential of Hydrogen) of a reaction system to be alkaline, cooling to room temperature, andfiltering, thus obtaining