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Catalyzer for industrial production of 1,6-hexamethylene glycol and method of preparing the same

A technology of catalyst and hexanediol, which is applied in the preparation of hydroxyl compounds, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of increased catalyst costs, high equipment requirements, and complicated catalyst processes, and achieve obvious social benefits and Economic benefits, uniform precipitation, good dispersion and thermal stability

Inactive Publication Date: 2008-03-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese Patent Publication No. CN 1565729A discloses a catalyst for the hydrogenation of 1,6-dimethyl adipate to prepare 1,6-hexanediol, the catalyst adopts copper oxide-zinc oxide-alumina-barium oxide, The composition of the catalyst is four components, and the increase in the types of raw materials for the catalyst will complicate the process of preparing the catalyst, and will also increase the cost of the catalyst
The reaction pressure introduced by the above-mentioned patented technology is 100-400bar, high pressure requires high equipment conditions, and increases equipment investment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]Mix 172.96 kg of copper nitrate and 289.06 kg of zinc nitrate, dissolve it in 486 liters of deionized water to form a mixed salt solution; dissolve 36.22 kg of aluminum hydroxide in 855 liters of deionized water to prepare a suspension; Sodium and 318 kg of sodium carbonate are dissolved in 405 liters of deionized water to form a mixed alkali solution, and the heating temperature is controlled between 50 and 90 ° C, and the mixed salt solution and aluminum hydroxide solution are neutralized with the alkali solution under stirring, and the control The pH value is 7~8, the addition time is controlled for 4 hours, and the precipitate is produced at the same time. The precipitate is filtered, washed, dried at 100°C for 15 hours, granulated, roasted at 200±5°C for 2 hours, and roasted at 500±5°C After 1 hour, add the mixing agent and mix evenly, and finally press into tablets to obtain catalyst I. The contents of copper oxide, zinc oxide and aluminum oxide in catalyst I are 36...

Embodiment 2

[0024] Mix 86.48 kg of copper nitrate and 144.53 kg of zinc nitrate, and dissolve it with 243 liters of deionized water to form a mixed salt solution; dissolve 18.11 kg of aluminum hydroxide in 428 liters of deionized water to prepare a suspension; Sodium and 398 kg of sodium carbonate are dissolved in 315 liters of deionized water to form a mixed alkali solution, and the heating temperature is controlled at 50-90°C, and the mixed salt solution and aluminum hydroxide solution are neutralized with the alkali solution under stirring to control the pH value 7-8, control the addition time for 4 hours, and produce precipitate at the same time, filter and wash the precipitate, dry at 100°C for 15 hours, then granulate, roast at 200±5°C for 2 hours, and roast at 500±5°C for 1 hour hour, then add the mixing agent and mix evenly, and finally press into tablets to obtain the catalyst II. The contents of copper oxide, zinc oxide and aluminum oxide in the catalyst II are 36%, 59% and 15% r...

Embodiment 3

[0026] Mix 136.13 kg of copper nitrate and 82.69 kg of zinc nitrate, dissolve it in 375 liters of deionized water to form a mixed salt solution; dissolve 17.56 kg of aluminum hydroxide in 855 liters of deionized water to prepare a suspension; Sodium and 318 kg of sodium carbonate are dissolved in 405 liters of deionized water to form a mixed alkali solution, and the heating temperature is controlled between 50 and 90 ° C, and the mixed salt solution and aluminum hydroxide solution are neutralized with the alkali solution under stirring, and the control The pH value is 7-8, the addition time is controlled for 4 hours, and the precipitate is produced at the same time. The precipitate is filtered, washed, dried at 100°C for 15 hours, granulated, roasted at 200±5°C for 2 hours, and roasted at 500±5°C After 1 hour, the mixture was added and mixed evenly, and finally pressed into tablets to obtain Catalyst III. The contents of copper oxide, zinc oxide and aluminum oxide in Catalyst I...

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Abstract

A catalyst used for industrial production of 1, 6-hexanediol and a preparation method for the catalyst and relate to a catalyst used for hydrogenated production of 1, 6-hexanediol with 1, 6 dimethylene adipate, and a preparation method for the catalyst. The catalyst basically comprises copper oxide, zinc oxide and aluminum oxide. The copper oxide takes up 25 to 60 percent of the total catalyst weight, the zinc oxide takes up 25 to 60 percent of the total catalyst weight, and the aluminum oxide takes up 10 to 30 percent. The preparation method comprises preparation of a copper nitrate and zinc nitrate mixed solution, preparation of a aluminum hydroxide suspension, deposition, filtering, washing, drying, granule making, calcination, mixing with an extender, tablet pressing and molding. Thus, the catalyst used for industrial production of 1, 6-hexanediol is produced, and make the conversion rate of the raw material of 1, 6 dimethylene adipate larger than 99 percent and the hexanediol selectivity larger than 96 percent.

Description

technical field [0001] The present invention relates to the catalyst that is used for industrial production 1,6-hexanediol and preparation method thereof, particularly a kind of catalyst that is used for hydrogenation of 1,6-dimethyl adipate and prepares 1,6-hexanediol and its preparation method. Background technique [0002] 1,6-hexanediol is 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 coatings, adhesives, new polyesters, sealants and plasticizers. Polyester polyols prepared from 1,6-hexanediol can be used in the production of polyurethane elastomers, and the products have excellent mechanical strength, heat resistance, water resistance, and oxidation resistance. Polyurethane elastomers are widely used in synthetic rubber, synthetic fiber, synthetic leather and other fields. With the improvement of living standards, people's requirements for the ...

Claims

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Application Information

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IPC IPC(8): B01J23/835B01J23/80C07C31/20C07C29/149
Inventor 程光剑黄集钺史君张元礼李民任建平石鸣彦贺俊海琼伟格
Owner PETROCHINA CO LTD
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