Catalyst for synthesizing N, N-diethyl propargylamine and preparation method thereof

Abstract

The invention discloses a catalyst for synthesizing N, N-diethyl propargylamine, which takes coarse-pore microsphere silica gel as a carrier and is loaded with a mixture of copper salt, bismuth salt and cerium salt. According to the catalyst provided by the invention, the coarse-pore microsphere silica gel is used as the carrier, the specific surface area of the catalyst is increased and is dozensof times or even hundreds of times that of a conventional catalyst, the catalyst can be in full contact with reaction raw materials, the reaction rate is increased, the reaction time is shortened, the probability of side reactions is reduced, and meanwhile, the use amount of the catalyst is greatly reduced; and the catalyst takes a mixture of copper salt, bismuth salt and cerium salt as an activecomponent, and the copper salt, bismuth salt and cerium salt have a synergistic effect, so that the side reaction in the process of synthesizing N, N-diethylpropargylamine can be effectively inhibited, the reaction selectivity is improved, and the yield and purity of N, N-diethylpropargylamine are improved. The invention also provides a preparation method of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a catalyst for synthesizing N,N-diethylpropynylamine and a preparation method thereof. Background technique [0002] N,N-Diethylpropargylamine is a nickel plating additive with excellent performance, which has excellent brightening and leveling effects, and is widely used in nickel plating and alloy electroplating industries. Its CAS number is 4079-68-9 and its molecular formula is C 7 h 13 N, the molecular weight is 111.20. [0003] At present, the industrialized production method of N,N-diethylpropynylamine mainly uses formaldehyde, diethylamine and acetylene (or formaldehyde, propynyl chloride and acetylene) as raw materials, copper salt as a catalyst, and reacts in an organic solvent or water system to form N,N-Diethylpropynylamine. The method has the advantages of easy acquisition of raw materials, low cost, short production cycle, large output, little poll...

AI Technical Summary

Problems solved by technology

However, in the production scale-up process, it was found that the copper salt catalyst had poor selectivity and low activity, and a large number of side reactions occurred in the production process, in which the by-product polyacetylene could rapidly deactivate the catalyst, resulting in N,N-diethylpropyne Amine yield and purity are reduced; in addition, copper salt catalysts are not easy to recycle and can only be treated in waste water pools, which will also cause heavy metal pollution to a certain extent

Images