A kind of diacetone alcohol hydrogenation catalyst and its preparation method and application

Abstract

The invention disclose a diacetone alcohol hydrogenation prepared iso-hexylene glycol catalyst which comprises an active component nickel and a modified Y molecular sieve, wherein the mass ratio of the active component nickel to the modified Y molecular sieve in oxide is (15:85)-(45: 55), preferably (20:80)-(35:65); the properties of the modified Y molecular sieve are as follows: the specific surface area is 500-900 m<2> / g and preferably 600-800 m<2> / g, the total pore volume is 0.20-0.6 ml / g, the average pore size is 1.9-3.0 nm, the relative crystallinity is 80-110%, the mole ratio of silicon to aluminum is 3-30 and preferably 10-20, the cell parameter is 2.425-2.445 nm, the proportion of medium-strong acid is 50-90%, and the boric oxide content is less than or equal to 4.0wt% and preferably less than or equal to 2.5wt%. The catalyst can be applied to the fixed bed process, shows excellent high activity and stability in long-period running process and can be used for continuously and stably producing iso-hexylene glycol.

Description

technical field [0001] The invention relates to a diacetone alcohol hydrogenation catalyst and its preparation method and application, in particular to a diacetone alcohol hydrogenation preparation isohexanediol catalyst and its preparation method and application. Background technique [0002] Isohexanediol (2-methyl-2,4-pentanediol, methylpentanediol-2,4, referred to as MPD) is a widely used fine chemical product, in building materials, cosmetics, textiles, pesticides, coatings , biochemical engineering, organic synthesis and other fields have been widely used, mainly used as solvents, coupling agents, emulsifiers, penetrants, stabilizers, etc. [0003] As a coupling agent, MPD can form a stable protease solution when used in the protease active composition solution. It has tough elasticity, high hardness, wear resistance and weather resistance coating made of PVC, ABS polyacrylate and other resins. It has been used in the fields of construction and shipbuilding; MPD is a ...

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Problems solved by technology

[0014] The above patent documents prepare isohexanediol by hydrogenation of diacetone alcohol in a batch reaction mode, adopt Ni series catalysts or add basic compounds in Ni series catalysts, the catalyst preparation method is more complicated, the reaction conditions are harsh, the catalyst is expensive, and the production capacity Small, not suitable for pilot scale-up and industrial production; and this batch process has problems such as difficult separation of catalyst and product, low yield, etc.

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