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Catalyst for fixed bed hydrogenation for continuous production of fatty alcohol, preparation method thereof and application thereof

A catalyst and fixed bed technology, applied in the field of catalysts, can solve the problems of short service life of copper-zinc catalysts, easy aggregation and growth of copper catalysts, unfavorable continuous production, etc., so as to improve the actual processing capacity, reduce equipment investment costs and reaction time. short effect

Inactive Publication Date: 2012-11-14
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1050144A discloses a copper silicate catalyst, with copper and zinc as the active component and silicon oxide as the carrier. This catalyst has higher activity than the CuCr catalyst on the market, but because the copper catalyst is easy to aggregate and grow up at medium and high temperatures, Therefore, the service life of copper-zinc catalysts is generally short
But its reaction time is too long (12-24h), and adopts autoclave reactor, is unfavorable for continuous production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 69.2g sodium silicate to make 250ml solution, 117.7g aluminum nitrate to make 250ml solution, add the two into a 3000ml beaker side by side, the reaction temperature is controlled at 70°C, the stirring speed is 700 rpm, drop After the addition is completed, adjust the pH to 6.5-7.5 with nitric acid, and age at 70° C. for 1 hour to obtain mixed precipitates of silicon and aluminum. Weigh 85g copper nitrate, 102.4g zinc nitrate, 41.2g manganese nitrate, add water to make 1000ml solution; weigh 250g sodium carbonate to make 1000ml solution. The two solutions were added dropwise to the silicon-aluminum mixed precipitate, the temperature of the water bath was 70°C, the stirring speed was 800 rpm, and the pH of the solution was kept between 6.5 and 7.5. After the dropwise addition, it was aged under reaction conditions for 3 hours, then filtered and washed 8 times, and the resulting filter cake was dried in an oven at 120°C for 2 hours, and finally the dried catalyst pr...

Embodiment 2

[0035] Weigh 153.8g sodium silicate to make 250ml solution, 29.4g aluminum nitrate to make 250ml solution, add the two into a 3000ml beaker side-by-side, the reaction temperature is controlled at 80°C, the stirring speed is 800 rpm, drop After the addition is completed, adjust the pH to 6.5-7.5 with nitric acid, and age at 80° C. for 0.5 h to obtain a mixed precipitate of silicon and aluminum. Weigh 130.6g copper nitrate, 43.9g zinc nitrate, 1.7g barium nitrate, add water to make 1000ml solution; weigh 200g sodium carbonate to make 1000ml solution. The two solutions were added dropwise to the silicon-aluminum mixed precipitate, the temperature of the water bath was 80°C, the stirring speed was 800 rpm, and the pH of the solution was kept between 6.5 and 7.5. After the dropwise addition, it was aged under reaction conditions for 4 hours, then filtered and washed 6 times, and the resulting filter cake was dried in an oven at 90°C for 12 hours, and finally the dried catalyst prec...

Embodiment 3

[0038] Weigh 76.9g sodium silicate to make 250ml solution, 73.6g aluminum nitrate to make 250ml solution, add the two into a 3000ml beaker side by side, the reaction temperature is controlled at 50°C, the stirring speed is 600 rpm, drop After the addition is completed, adjust the pH to 6.5-7.5 with nitric acid, and age at 50° C. for 1 hour to obtain a mixed precipitate of silicon and aluminum. Weigh 91.1g copper nitrate, 36.6g zinc nitrate, 82.6g zirconium nitrate, add water to make 1000ml solution; weigh 200g sodium carbonate to make 1000ml solution. The two solutions were added dropwise to the silicon-aluminum mixed precipitate, the water bath temperature was 50°C, the stirring speed was 800 rpm, and the pH of the solution was kept between 6.5 and 7.5. After the dropwise addition, it was aged under reaction conditions for 2 hours, then filtered and washed 8 times, and the resulting filter cake was dried in an oven at 100°C for 15 hours, and finally the dried catalyst precurs...

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PUM

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Abstract

The invention discloses a catalyst for fixed bed hydrogenation for continuous production of fatty alcohol. In the catalyst, copper and zinc are used as active components, one or more of manganese, barium or zirconium are used as a cocatalyst, and silicon and aluminum are taken as a structural promoter. Measuring by oxides, the content of the active components is 40 to 95 percent by mass; the content of the cocatalyst is 1 to 30 percent by mass; and the content of the structure promoter is 0.01 to 50 percent by mass. The catalyst has the advantages of environmentally friendliness, high activity, high selectivity, long service life and capability of catalyzing the fixed bed hydrogenation under a relatively low pressure for producing the fatty alcohol.

Description

technical field [0001] The invention belongs to a catalyst, a preparation method and an application of a fixed-bed hydrogenation continuous production of fatty alcohol. Background technique [0002] Natural fatty alcohols have been developed rapidly in recent years because of their excellent cleaning performance and biodegradability, and are the basic raw materials for the production of cationic, anionic and nonionic surfactants. The sharp increase in biodiesel production has led to a decline in the price of glycerol and fatty acid methyl esters, and it has also brought opportunities for the development of downstream products of glycerol and fatty acid methyl esters. [0003] The traditional production process of natural fatty alcohol is to transesterify oil and methanol to produce fatty acid methyl ester, and then hydrogenate fatty alcohol at high temperature and high pressure in the presence of a catalyst. At present, CuCr catalysts are mainly used in industry, and the Cr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J23/80C07C29/149C07C31/125
Inventor 李学宽唐明兴杜明仙侯相林贾时宇吕占军唐曙光葛晖
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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