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Catalyst for preparing hexanediol from dimethyl adipate and preparation method and application thereof

A technology of dimethyl adipate and a catalyst, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of poor dispersion performance, poor dispersibility, and poor heat resistance, and achieve improved Heat resistance, good application prospects, and the effect of reducing production costs

Active Publication Date: 2016-07-06
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When preparing the catalyst, the dispersibility of copper is improved by using aluminum hydroxide suspension instead of alumina powder, but aluminum hydroxide powder has the problem of poor dispersibility in water, because of the low melting point of copper, poor dispersibility will lead to The problem of poor heat resistance

Method used

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  • Catalyst for preparing hexanediol from dimethyl adipate and preparation method and application thereof
  • Catalyst for preparing hexanediol from dimethyl adipate and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of aluminum latex:

[0038] 1) Take 30ml of 1mol / L aluminum nitrate solution and heat it to 80°C;

[0039] 2) Take 110ml of 0.5mol / L ammonium carbonate and heat to 80°C;

[0040] 3) Slowly add 2) to 1), control the pH value at the end point of the addition = 8.5, and then age at room temperature for 1 hour for later use.

[0041] Catalyst preparation:

[0042] 1) Take 180ml of 1mol / L copper nitrate solution, 180ml of 0.5mol / L zinc nitrate solution, and 0.608g of zirconium oxychloride, mix and heat to 65°C to obtain solution 1;

[0043] 2) Take 550ml of 0.5mol / L sodium carbonate and 10ml of 30wt% ammonia water in a three-necked flask and heat it to 65°C to obtain solution 2;

[0044] 3) Add solution 1 prepared in 1) dropwise to solution 2 prepared in 2) under stirring, control the pH at the end point of addition to 7.0, and then age at this temperature for 0.5 h to obtain a mixed mother liquor of copper-zinc basic salt;

[0045] 4) Add the above-prepared ...

Embodiment 2

[0049] Preparation of aluminum latex:

[0050] 1) Take 90ml of 1mol / L aluminum nitrate solution and heat it to 60°C;

[0051] 2) Take 300ml of 0.5mol / L sodium carbonate and heat to 60°C;

[0052] 3) Slowly add 2) to 1), control the pH value at the end point of addition to 7.5, and then age at room temperature for 12 hours for later use.

[0053] Catalyst preparation:

[0054] 1) Take 210ml of 0.5mol / L copper nitrate solution, 52.5ml of 2mol / L zinc nitrate solution, and 0.608g of zirconium oxychloride, mix and heat to 75°C to obtain solution 1;

[0055] 2) Take 220ml of 1mol / L sodium carbonate and 60ml of 1mol / L ammonium carbonate in a three-necked flask and heat to 75°C to obtain solution 2;

[0056] 3) Add solution 1 prepared in 1) to solution 2 prepared in 2) under stirring, control the pH of the addition end point to 8.0, and then age at this temperature for 1 hour to obtain a mixed mother liquor of copper-zinc basic salt;

[0057] 4) Add the above-prepared aluminum glu...

Embodiment 3

[0061] Preparation of aluminum latex:

[0062] 1) Take 150ml of 0.5mol / L aluminum nitrate solution and heat it to 40°C;

[0063] 2) Take 100ml of 10wt% ammonia water and heat to 40°C;

[0064] 3) Slowly add 2) to 1), control the pH value at the end point of addition = 8.0, and then age at room temperature for 1 hour for later use.

[0065] Catalyst preparation:

[0066] 1) Take 75ml of 1mol / L copper nitrate solution, 150ml of 1mol / L zinc nitrate solution, and 0.608g of zirconium oxychloride, mix and heat to 78°C to obtain solution 1;

[0067] 2) Take 350ml of 0.5mol / L sodium carbonate, 5ml of 30wt% ammonia water and 50ml of 1mol / L ammonium bicarbonate in a three-necked flask and heat to 78°C to obtain solution 2;

[0068] 3) Add solution 1 prepared in 1) to solution 2 prepared in 2) under stirring, control the pH at the end point of addition to 7.8, and then age at this temperature for 0.5 h to obtain a mixed mother liquor of copper-zinc basic salt;

[0069] 4) Add the abo...

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Abstract

The invention discloses a catalyst for preparing 1,6-hexanediol from dimethyl adipate.The catalyst is composed of a Cu-Zn-Al-Zr oxide, and comprises 25-60% of Cu, 25-50% of Zn, 10-30% of Al and 0.15-1.2% of Zr.The invention further discloses a preparation method of the catalyst.The catalyst is good in activity and heat resistance.Compared with the prior art, the reduction temperature of the catalyst is low and is 200-220 DEG C, the catalyst can be directly reduced in a reactor, and the cost is reduced; when the catalyst is in use, reaction pressure is reduced to 5-8 MPa, the air speed is decreased, and finally the production cost of hexanediol can be reduced; the preparation method is simple, no additional special equipment is needed, and the application prospect is good.

Description

technical field [0001] The invention belongs to the field of catalysts, and relates to a catalyst for hydrogenating dimethyl adipate to 1,6-hexanediol, a preparation method and an application thereof. Background technique [0002] 1,6-Hexanediol, as a newly emerging important fine chemical raw material, has unique properties and is non-corrosive. It is mainly used as a raw material for UV coatings, polyurethanes, new polyesters, plasticizers and binders. It is known as the new cornerstone of organic synthesis for improving the mechanical strength of products, improving hydrolysis resistance, heat resistance, oxidation resistance and chemical reagent resistance. The preparation methods of hexanediol include: hydrogenation method of hexynediol, epoxy butadiene method, hydrogenation method of dimethyl adipate. Among them, the hydrogenation method of hexynediol has a long process route and high production cost; the conversion rate and selectivity of the epoxybutadiene method ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80C07C29/149C07C31/20
CPCB01J23/002B01J23/80B01J2523/00C07C29/149B01J2523/17B01J2523/27B01J2523/31B01J2523/48C07C31/20
Inventor 张元华王艳辉唐劲松张羿新陈恩之唐丽华刘鑫王乾龙
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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