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Catalyst for preparing fatty alcohol with low carbon number by catalyzing and hydrolyzing glycerol and preparation method thereof

A technology for catalyzing hydrogenolysis and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. catalysts, etc.

Inactive Publication Date: 2010-07-07
BAYER TECH & ENG SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carrier WO used 3 / ZrO 2 has been extensively studied in the field of acid catalysis as a solid superacid, but in this work WO 3 The effect is to improve the selectivity of 1,3-propanediol, rather than purposefully enhance the acidity of the catalyst, because the support is prepared by roasting at 500°C, and the WO prepared by roasting at this temperature 3 / ZrO 2 The tetragonal ZrO phase necessary for strong acidity cannot be formed 2 structure
In addition, this method is still a batch process, and the reaction conditions are harsh. It needs to react at 170 ° C and 8.0 MPa hydrogen pressure for 18 hours, and the efficiency is low.
[0010] In summary, the existing technologies in the field of catalytic hydrogenolysis of glycerin generally have disadvantages such as low conversion rate of glycerin and harsh reaction conditions, and most of them are batch production processes, which are not conducive to the effective use of glycerin in the industry to produce low-carbon fatty alcohols, etc. High value-added products

Method used

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  • Catalyst for preparing fatty alcohol with low carbon number by catalyzing and hydrolyzing glycerol and preparation method thereof
  • Catalyst for preparing fatty alcohol with low carbon number by catalyzing and hydrolyzing glycerol and preparation method thereof
  • Catalyst for preparing fatty alcohol with low carbon number by catalyzing and hydrolyzing glycerol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Using ZrOCl 2 ·8H 2 O aqueous solution and 25-28% ammonia water to prepare zirconium hydroxide by precipitation method. Use (NH 4 ) 6 W 12 o 39 ·xH 2 O solution impregnates the dried and ground zirconium hydroxide, evaporates the impregnating solution to dryness, and then dries the obtained solid at 110°C and roasts at 823°C to obtain a strongly acidic catalyst carrier tungstate-promoted zirconia (WO x / ZrO 2 ). The tungsten content of the support was 15% by weight. Use H 2 PtCl 6 ·6H 2 O, Cu(OH) 2 ·3H 2 O, RhCl 3 ·xH 2 O, Ni(NO 3 ) 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O, NH 4 ReO 4 , IrCl 3 ·xH 2 O, OsCl 3 ·3H 2 O and RuCl 3 ·xH 2 Aqueous solution of O and PdCl 2 The hydrochloric acid solution was impregnated with WO x / ZrO 2 , and then sequentially dried at 110°C and calcined at 823°C to prepare a series of metal-acidic bifunctional catalysts. The metal content in each catalyst was 5 wt%.

[0045] Weigh 0.5g of catalyst, mix it with a certain...

Embodiment 2

[0052] Using RhCl 3 ·xH 2 The catalyst Rh / ZrO 2 , Rh / WO 3 , Rh / SiO 2 , Rh / Al 2 o 3 , Rh / USY, Rh / TiO 2 -SiO 2 and Rh / Al 2 o 3 -SiO 2 , for the catalyst Rh / WO with the highest activity in Example 1 x / ZrO 2 Compare. The Rh content in the prepared catalysts was all 5wt%.

[0053] According to the same method as in Example 1, the activity of the catalyst prepared above on the hydrogenolysis reaction of glycerol was investigated through experiments #11-#17, and the reaction conditions and results are listed in Table 2. The conversion rate of glycerol obtained in Table 2 is significantly lower than that using the strong acid carrier WO x / ZrO 2 Prepared Catalyst Rh / WO x / ZrO 2 response results.

[0054] Table 2 Catalytic activity of Rh catalysts loaded on different supports for glycerol hydrogenolysis reaction

[0055]

[0056]

Embodiment 3

[0058] Different acidic supports MoO were prepared by the following two steps x / ZrO 2 、BO x / ZrO 2 、WO x / TiO 2 and WO x / Fe 2 o 3 . 1) Using ZrOCl 2 ·8H 2 O and Fe(NO 3 ) 3 9H 2 Aqueous solution of O and TiCl 4 hydrochloric acid solution, respectively, and 25-28% ammonia water for precipitation reaction to prepare the corresponding metal hydroxide. 2) using (NH 4 ) 6 Mo 7 o 24 4H 2 O, H 3 BO 3 and (NH 4 ) 6 W 12 o 39 ·xH 2 O aqueous solution was impregnated with the obtained metal hydroxide, and the evaporated solid was dried at 110° C. and calcined at different temperatures shown in Table 3 to obtain a catalyst carrier. The contents of molybdenum, boron and tungsten in the prepared carrier are all 15wt%. Using the same method in Example 2, Rh (5wt%) is loaded onto the prepared acidic carrier to prepare the catalyst Rh / MoO x / ZrO 2 , Rh / BO x / ZrO 2 , Rh / WO x / TiO 2 and Rh / WO x / Fe 2 o 3 , for Rh / WO with the highest activity in Example 1 x...

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Abstract

The invention relates to a catalyst for catalyzing and hydrolyzing glycerol and a preparation method thereof as well as a method for preparing fatty alcohol with low carbon number by using the catalyst to catalyze and hydrolyze the glycerol. In the invention, a supported metal-acid difunctional catalyst is used, so that the glycerol is hydrolyzed under the mild reaction condition to prepare 1-propanol, 2-propanol, propanediol, acetol and the like.

Description

technical field [0001] The present invention relates to a supported catalyst, a preparation method of the catalyst, a method of using the catalyst to catalyze the hydrogenolysis of glycerin to prepare low-carbon fatty alcohols, and the use of the catalyst in the reaction of preparing low-carbon fatty alcohols by catalytic hydrogenolysis of glycerol Applications. Background technique [0002] With the rapid development of biodiesel preparation technology, as the main by-product of biodiesel process, the yield of glycerol will also be greatly improved. Therefore, the efficient and full utilization of glycerol derived from biomass is in line with the trend and requirements of environmental friendliness and sustainable development, and has become one of the focuses of people's attention and research in recent years. [0003] Catalytic hydrogenolysis of glycerol to prepare low-carbon fatty alcohols is an effective method that can utilize glycerol in large quantities. Propylene ...

Claims

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Application Information

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IPC IPC(8): B01J23/652B01J23/888C07C29/60
Inventor 郭岱石胡琼内斯劳·姆莱奇科亚历山大·格罗斯·博文
Owner BAYER TECH & ENG SHANGHAI
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