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Preparation method of octylene aldehyde gas phase hydrogenation catalyst for octanol production

A catalyst, octenal technology, applied in catalyst activation/preparation, preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of poor catalyst stability, short life, many by-products, etc. Hydrogenation activity and effect of increasing specific surface area

Inactive Publication Date: 2012-04-11
THE NORTHWEST RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Copper-based catalysts for gas-phase hydrogenation of octenal to octanol have been widely used in industrial production due to their good activity and low price, but the catalysts still have disadvantages such as poor stability, short life, and many by-products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Catalysts for the hydrogenation of octenal to octanol by traditional methods:

[0027] Dissolve 41.7 grams of copper (added in the form of copper nitrate) and 85.8 grams of zinc (added in the form of zinc nitrate) in deionized water to make a 1M acidic solution, heat to 40-50 °C; weigh 200 grams of sodium carbonate Dissolve it in deionized water to form a 15.7% (w / w) alkaline solution, heat it to 60-70°C; add the acidic solution to the alkaline solution under stirring conditions for co-precipitation, and the final pH value of the precipitation mixture is 7.9- 8.5, the obtained precipitated mixed material is washed to Na in the slurry + Content ≤ 0.05% (w / w) after filtration, the filter cake is dried at 110 ° C ~ 120 ° C, and then granulated, the dried particles are roasted at 350 ° C, and then add 2% graphite by weight of the powder and 5% desulfurized The ionic water is pressed into a tablet to form a catalyst.

Embodiment 2

[0029] Catalysts for the hydrogenation of octenal to octanol by traditional methods:

[0030] Weigh 145 grams of copper nitrate and 356 grams of zinc nitrate and dissolve them in deionized water to make a 1M acidic solution, heat to 60°C-75°C; weigh 210 grams of sodium carbonate and dissolve them in deionized water to make a 1M alkaline solution , heated to 60-75°C; under stirring conditions, add the acidic solution to the alkaline solution, control the end-point pH value to 7.0-7.5, then stir and age at 60°C-75°C for 30min, and the obtained precipitated material is washed Na in the slurry + Content ≤ 0.05% (w / w), add 7 grams of alumina, then filter, dry the filter cake at 110-120°C, then granulate, dry the particles at 350°C, and then add powder with a weight percentage of 2% Graphite and 5% deionized water were pressed into tablets to prepare the catalyst.

Embodiment 3

[0032] Adopt the inventive method to prepare the catalyst of octenal hydrogenation octanol:

[0033]Step 1, using the anti-addition co-precipitation process, adding 1.5L of a precipitant aqueous solution with a concentration of 1mol / L into the reactor and stirring at a stirring rate of 500rpm, and then adding 1.5L of copper nitrate with a total concentration of 1mol / L Add the mixed aqueous solution of zinc nitrate and zinc nitrate to the reactor containing the aqueous solution of the precipitating agent at a uniform speed within 10 minutes to carry out the neutralization reaction. The color changes from blue to grass green, and the precipitated material of copper and zinc is obtained; the mol ratio of zinc and copper in the mixed aqueous solution of zinc nitrate and copper nitrate is 1.5: 1; the reaction temperature of the stirring reaction is 80 ℃ ; The aqueous solution of the precipitating agent is Na 2 CO 3 aqueous solution;

[0034] Step 2. Using the co-precipitation pr...

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PUM

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Abstract

The invention discloses a preparation method of octylene aldehyde gas phase hydrogenation catalyst for octanol production. The method comprises: firstly, adopting coprecipitation to add mixed aqueous solution of copper nitrate and zinc nitrate and aqueous solution of precipitator into a reactor for neutralization, obtaining copper and zinc precipitate; secondly, adopting cocurrent coprecipitationadd mixed aqueous solution of zinc nitrate and aluminium nitrate and aqueous solution of precipitator into a reactor for neutralization, obtaining copper, zinc and aluminum precipitate; thirdly, ageing the precipitate, washing, filtering, drying, pelletizing and roasting to obtain powder material; fourthly, adding graphite and deionized water to the powder material and tabletting to obtain the catalyst. The invention adopts fractional continuous coprecipitation method to effectively increase specific surface area of the catalyst, to increase hydrogenation activity of the catalyst and to improve thermal stability of the catalyst. Furthermore, the coprecipitation is finished in the same rector to simplify the technical process, to save the equipment investment, to reduce the production costand to realize industrialized production more easily.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method of a catalyst for gas-phase hydrogenation of octenal to produce octanol. Background technique [0002] Octanol is an important chemical raw material and fine chemical, and the hydrogenation of octenal to octanol is an important means of industrial production of octanol. Copper-based catalysts for gas-phase hydrogenation of octenal to octanol have been widely used in industrial production due to their good activity and low price. However, the catalysts still have disadvantages such as poor stability, short life, and many by-products. In order to improve the dispersion of the active component copper, the preparation of the catalyst adopts the co-precipitation preparation process. At present, the research on the hydrogenation catalyst mainly focuses on the improvement of the co-precipitation preparation process and the optimization of the preparati...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J37/03C07C31/125C07C29/141
Inventor 李选志王亚利曹晓玲任涛
Owner THE NORTHWEST RES INST OF CHEM IND
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