Copper-based catalyst for neopentylene glycol preparation from hydrogenation method and preparation method thereof

A technology of copper-based catalyst and neopentyl glycol, which is applied in the field of catalysts, can solve the problems of difficult continuous and large-scale production, fast deactivation, and high production costs, and achieve the effects of reducing pollution, stable properties, and cheap prices

Inactive Publication Date: 2013-09-18
ZIBO MINGXIN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, nickel-based catalysts have low catalytic activity and rapid deactivation, making continuous and large-scale production difficult. The high temperature conditions required increase the probability of self-condensation of hydroxyvaleraldehyde, which reduces the selectivity of neopentyl glycol and product quality.
Noble metal-based catalysts show better activity and selectivity under lower temperature and pressure conditions, but the catalyst is expensive and the production cost is high

Method used

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  • Copper-based catalyst for neopentylene glycol preparation from hydrogenation method and preparation method thereof
  • Copper-based catalyst for neopentylene glycol preparation from hydrogenation method and preparation method thereof
  • Copper-based catalyst for neopentylene glycol preparation from hydrogenation method and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] This embodiment includes the following steps:

[0013] Step 1: Prepare copper hydroxide precipitate by co-precipitation method, prepare 0.05mol / L copper sulfate solution, and prepare 0.1mol / L sodium hydroxide solution at the same time, add copper sulfate solution and refined diatomite (average average) to the reactor. The particle size is 2 μm), the mass ratio of purified diatomite and copper sulfate is 35:130, stirring at a temperature of 35 ° C, then adding the prepared sodium hydroxide solution, adjusting the pH value to 8, stirring for 3 hours, The stirring speed is 200r / min; the reaction equation is:

[0014]

[0015] In step 2, the solution obtained in step 1 is filtered through a plate and frame filter press to make a filter cake, and the filter cake is washed and filtered twice with water, and then under the environmental conditions of good illumination, temperature -5 ° C, and relative humidity of 10% , dry for 1 day, and then send it to the feeder after dr...

Embodiment 2

[0024] Step 1: Prepare copper hydroxide precipitate by co-precipitation method, prepare 0.1 mol / L copper sulfate solution, and prepare 0.1 mol / L sodium hydroxide solution at the same time, first add copper sulfate solution and copper sulfate solution with an average particle size of 2 μm to the reactor. Refined diatomite, the mass ratio of purified diatomite and copper sulfate is 28:144, stir at 37 ° C temperature, then add the prepared sodium hydroxide solution, adjust the pH value to 9, stir for 4 hours, stir The speed is 300r / min; its reaction equation is:

[0025]

[0026] In step 2, the solution obtained in step 1 is filtered through a plate and frame filter press to make a filter cake, and the filter cake is washed and filtered with water for 3 times and then under the environmental conditions of good illumination, temperature of 37 ° C and relative humidity of 60%, Dry for 1 day, and then send it to the feeder after drying, and then use the feeder to transport it int...

Embodiment 3

[0035] Step 1: Prepare copper hydroxide precipitate by co-precipitation method, prepare 0.1mol / L copper sulfate solution, and simultaneously prepare 0.1mol / L sodium hydroxide solution, first add copper sulfate solution and refined diatomite (average) to the reactor. The particle size is 2 μm), the mass ratio of purified diatomite and copper sulfate is 20:160, stirring at a temperature of 40 ° C, then adding the prepared sodium hydroxide solution, adjusting the pH value to 10, stirring for 4 hours, The stirring speed is 350r / min; its reaction equation is:

[0036]

[0037] In step 2, the solution obtained in step 1 is filtered through a plate and frame filter press to make a filter cake, and the filter cake is washed and filtered with water for 3 times and then under the environmental conditions of good illumination, temperature of 20 ° C and relative humidity of 30%, Dry for 1 day, and then send it to the feeder after drying, and then use the feeder to transport it into the...

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Abstract

A copper-based catalyst for neopentylene glycol preparation from a hydrogenation method and a preparation method thereof. The method comprises steps of: first preparing a copper sulphate aqueous solution; adding refined diatomite into the mixed liquor and stirring; adjusting a pH value by sodium hydroxide; filtering by a plate frame filter press; airing a filter cake and conveying the filter cake into an air-flow drier by a feeding machine; drying by air-flow hot air; and drying and packaging to obtain a finished product. The copper-based catalyst comprises copper oxide accounting for 65-80% of a gross weight of the catalyst and silica accounting for 20-35% of the gross weight of the catalyst. Usage of the catalyst generates no waste water, so as to mitigate environmental pollution; the catalyst has stable property, low price and no safety hidden trouble of a nickel system catalyst; the catalyst has small granularity but lager disperse area to facilitate a hydrogenation reaction; and the catalyst can be applied to neopentylene glycol preparation from hydrogenation in a temperature scope of 150-170 DEG C, and a conversion efficiency of the neopentylene glycol reaches higher than 99%.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a copper-based catalyst for preparing neopentyl glycol by a hydrogenation method and a preparation method thereof. Background technique [0002] Neopentyl glycol (NPG) is widely used in the production of various high-performance resins, plasticizers, synthetic lubricants, surfactants and ibuprofen drugs. The early formate production process has been replaced by the advanced condensation hydrogenation process abroad. The hydrogenation process to produce neopentyl glycol includes aqueous formaldehyde and isobutyraldehyde in alkaline catalysts (organic amines, phase transfer catalysts and anions). Aldol condensation under the action of exchange resin) produces hydroxyvaleraldehyde HPA, which is then hydrogenated to produce neopentyl glycol. There are mainly three types of hydrogenation catalysts used: nickel-based, copper-based and precious metal-based catalysts. However, nickel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72C07C31/20C07C29/14
Inventor 魏传明江津河许凤杰
Owner ZIBO MINGXIN CHEM
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