Method for synthesizing neopentyl glycol through catalytic hydrogenation of hydroxyvaleraldehyde

Abstract

The invention discloses a method for synthesizing neopentyl glycol through catalytic hydrogenation of hydroxyvaleraldehyde, which comprises the following steps of by taking hydroxyvaleraldehyde HPA as a raw material, adding an M-SBA-15 catalyst, placing in a high-pressure reaction kettle, introducing 3Mpa hydrogen for reaction, and collecting a product neopentyl glycol NPG and a byproduct 1115 ester after the reaction is accepted. The transition metal (Co, Mn or Ni)-doped SBA-15 catalyst (M-SBA-15) is applied to the reaction of synthesizing neopentyl glycol through catalytic hydrogenation of hydroxyvaleraldehyde, and has excellent performance on selective catalytic generation of neopentyl glycol, experiments prove that the conversion rate of HPA reaches 99% or above, the yield of the product NPG is 95% and is obviously improved compared with that of a traditional method, therefore, the method has important significance and application prospect in the technical field.

Description

technical field [0001] The invention belongs to a method for synthesizing neopentyl glycol, a derivative thereof, from hydroxyvaleraldehyde, in particular to a method for synthesizing neopentyl glycol by using a transition metal ion doped mesoporous molecular sieve as a catalyst. Background technique [0002] Neopentyl glycol (Neopentyl glycol, referred to as NPG, its chemical name is 2,2-dimethyl-1,3-propanediol) is a diol with a neopentyl structure, which can be used to produce a variety of synthetic resins And fine chemicals, such as polyester resins, polyurethane resins, acrylic resins, alkyd resins, plasticizers, synthetic lubricating oils, synthetic drying oils, fiber treatment agents and surfactants. Because NPG has two reactive primary alcoholic hydroxyl groups in the symmetrical position of the molecule, and there is no hydrogen atom on the central carbon atom, the molecule has high thermal and chemical stability, and has outstanding Viscosity and temperature adapt...

AI Technical Summary

Problems solved by technology

[0005] In the traditional hydrogenation reaction of hydroxyvaleraldehyde (HPA) to prepare neopentyl glycol, the commonly used catalysts are mainly metal salts, such as nickel-based, copper-based and noble metal-based metal salt catalysts, all have certain catalytic properties, but their The conversion rate of HPA is not more than 95%, and the yield of NPG is below 90%. At present, more than a dozen sets of high-grade paint and paint projects that need a large amount of high-purity NPG as raw materials have been completed and put into production in China, so the production of neopentyl glycol Market demand will continue to expand, therefore, the method for developing a kind of higher HPA conversion rate, NPG yield is still a very big challenge in this technical field

Images