Preparation method of N, N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-N, N'-dialdehyde hexamethylenediamine

The invention discloses a preparation method of N, N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-N, N'-dialdehyde hexamethylenediamine. The preparation method includes the steps: 1) adding, by mass, 1 part of formamide, 2-4 parts of N, N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-1,6-hexamethyle...

Full description

Saved in:
Bibliographic Details
Main Authors CAI ZHIQI, LU YUAN, GUO LINDAN, WEN XIUFANG, CHI LUNLUN, YU XIAOHONG
Format Patent
LanguageChinese
English
Published 01.06.2016
Subjects
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
Online AccessGet full text

Cover

More Information
Summary:The invention discloses a preparation method of N, N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-N, N'-dialdehyde hexamethylenediamine. The preparation method includes the steps: 1) adding, by mass, 1 part of formamide, 2-4 parts of N, N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-1,6-hexamethylenediamine and catalyst accounting for 1%-10% of total mass of hexamethylenediamine and formamide mixture into a reactor under nitrogen protection, performing return flow agitation at the temperature of 130-180 DEG C for 3-8h to obtain reaction liquid; (2) immediately and slowly adding enough water into the reaction liquid obtained in the step 1), stirring while cooling, washing, filtering and drying to obtain a product. The effective catalyst is selected, so that product purity is increased, the product can be obtained by only washing, operation is simplified, environmental friendliness is realized, and production cost is lowered.
Bibliography:Application Number: CN201610084980