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Catalyst and method for preparing 1,6-hexandiol by hydrogenation of 1,6-dimethyl adipate

A technology of dimethyl adipate and catalyst, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problem of increased pressure requirements of reaction equipment, increased production cost, and catalytic hydrogenation reaction pressure. Advanced problems, to achieve the effect of reducing one-time investment and production costs, and reducing the difficulty of operation

Inactive Publication Date: 2005-01-19
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, in the method for preparing 1,6-hexanediol, the common problem is that the pressure of the catalytic hydrogenation reaction is generally very high, which inevitably increases the pressure requirements of the reaction equipment, which will correspondingly increase the production capacity. The one-time investment of the device increases, the production cost increases, and the operation difficulty in production will also be increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Put 182.1 grams of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O), 73 grams of zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), 73.5 grams of aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and 18.2 grams of barium nitrate (Ba(NO 3 ) 2 ·H 2 O) Dissolve in 800 ml of distilled water. Under heating and stirring, it is neutralized with alkaline solution sodium hydroxide to PH = 7, and a precipitate is formed at the same time. After filtering and washing, it is dried at 120°C for 5 hours, calcined at 400°C for 4 hours, and formed. The catalyst was reduced in a hydrogen stream at 300°C for 4 hours before use.

Embodiment 2

[0017] Put 91.6 grams of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O), 182.7 grams of zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), 73.5 grams of aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and 18.2 grams of barium nitrate (Ba(NO 3 ) 2 ·H 2 O) Dissolve in 800 ml of distilled water. Under heating and stirring, it is neutralized with alkaline solution sodium carbonate to PH = 7, and a precipitate is formed at the same time. After filtering and washing, it is dried at 120°C for 5 hours, calcined at 400°C for 4 hours, and formed. The catalyst was reduced in a hydrogen stream at 300°C for 4 hours before use.

Embodiment 3

[0019] Put 91.6 grams of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O), 146.2 grams of zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), 147 grams of aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and 18.2 grams of barium nitrate (Ba(NO 3 ) 2 ·H 2 O) Dissolve in 800 ml of distilled water. Under heating and stirring, it is neutralized to PH=7 with alkali solution and ammonia water, and a precipitate is formed at the same time. After filtering and washing, it is dried at 120°C for 5 hours, and calcined at 400°C for 4 hours to form a shape. The catalyst was reduced in a hydrogen stream at 300°C for 4 hours before use.

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Abstract

The invention relates to a catalyst for hydrogenation preparation of 1,6-hexanediol by 1,6-dimethyl adipate and its preparation method. The catalyst consists of active component copper oxide-zinc oxide, aid alumina and barium oxide, in which, copper oxide is 30 to 60% by weight, zinc oxide is 20 to 50% by weight and alumina is 10 to 20% by weight, barium oxide is 10 to 20% by weight. The preparation process comprises the following steps: soluble salts of zinc ,aluminum and barium are mixed by weight and dissolved by water, said solution is neutralized to make pH valve be about 7 by aqueous alkali such as ammonia water, sodium hydroxide and so on, produced precipitate is washed, dried and baked, and then the catalyst is obtained.

Description

[0001] Field [0002] The invention relates to a catalyst for hydrogenating dimethyl 6-adipate to prepare 1,6-hexanediol and a preparation method thereof. Background technique [0003] 1,6-Hexanediol is a solid at room temperature, with a melting point of 42°C, a molecular weight of 118.18, and a density of 0.965g / cm 3 . 1,6-hexanediol is mainly used as a raw material for new polyesters, coatings, adhesives, sealants and plasticizers. Polyester polyol prepared with 1,6-hexanediol is used to modify polyurethane elastomer. The modified resin has excellent mechanical strength, heat resistance, water resistance and durable oxidation resistance. , and polyurethane elastomers can be widely used in synthetic rubber, elastic fibers, synthetic leather and other fields. At the same time, 1,6-hexanediol has a longer carbon chain and relatively greater flexibility, and can be used to prepare a new type of polyester product with special properties. On the other hand, with the continuou...

Claims

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Application Information

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IPC IPC(8): B01J23/825B01J37/08B01J37/16C07C29/149C07C31/20
Inventor 林培滋程光剑丁云杰关玉春黄世煜李凤鸣程显波王孝江
Owner PETROCHINA CO LTD
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