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Catalyst for gas-phase hydrogenation of octenal to octanol and preparation method thereof

A catalyst, octenal technology, applied in hydrogenation preparation, chemical instruments and methods, hydroxyl compound preparation, etc., can solve the problems of poor dispersibility of octenal hydrogenation catalyst, cumbersome preparation process, environmental pollution, etc., and achieve high octanol. Selectivity and catalytic stability, simple operation method, good dispersion effect

Active Publication Date: 2017-06-06
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In view of the poor dispersion and large particle size of the octenal hydrogenation catalyst prepared by the above coprecipitation method, the preparation process is cumbersome, the cost is high, and the preparation process will cause environmental pollution. A simple, clean, and high-utility treatment method for waste contacts. The invention provides a catalyst for gas-phase hydrogenation of octenal to octanol and a preparation method thereof

Method used

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  • Catalyst for gas-phase hydrogenation of octenal to octanol and preparation method thereof
  • Catalyst for gas-phase hydrogenation of octenal to octanol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Take 10g of organic silicon waste contact body, whose particle size after crushing and sieving is 0.5-100μm; put it into a muffle furnace, roast at 450°C for 2h, and cool to room temperature; put it in a 1000mL beaker, add 0.5mol / L of nitric acid 200mL, react at 80°C for 2h under stirring; add 4gZn(NO 3 ) 2 ·6H 2 O, then add urea solution, adjust the pH value to 9, put it into a hydrothermal kettle, perform a hydrothermal reaction at 180° C. under autogenous pressure for 8 hours, wash and dry. Use nitrogen as carrier gas, control H 2 The content is 5%, and it is reduced at 160°C for 10h.

[0057] Carry out XRD test on the X 'Pert PRO MPD type multifunctional X-ray diffractometer of the X 'Pert PRO MPD type multifunctional X-ray diffractometer that the catalyst of above-mentioned preparation is produced in Holland Panalytical company (panalytical company); Carry out ICP test ( The same below).

[0058] figure 1 It is the XRD pattern of the unreduced catalyst in Ex...

Embodiment 2

[0060] Take 10g of organic silicon waste contact body, whose particle size after crushing and sieving is 0.5-100μm; put it into a muffle furnace, roast at 600°C for 4h, and cool to room temperature; put it in a 1000mL beaker, add 0.5mol / L sulfuric acid 200mL, reacted at 60°C for 6h under stirring; add 2gZn(NO 3 ) 2 ·6H 2 O, then add urea solution, adjust the pH to 12, put it into a hydrothermal kettle, perform a hydrothermal reaction at 140° C. under autogenous pressure for 12 hours, wash and dry. Use nitrogen as carrier gas, control H 2 The content is 7%, and it is reduced at 160°C for 10h.

[0061] ICP test results show that the copper element content is 8.3%, and the zinc element content is 3.2%.

Embodiment 3

[0063] Take 10g of organic silicon waste contact body, whose particle size after crushing and sieving is 0.5-100μm; put it into a muffle furnace, roast at 900°C for 8h, and cool to room temperature; put it in a 1000mL beaker, add 6mol / L of nitric acid 200mL, react at 40°C for 10h under stirring; add 10gZnSO 4 ·7H 2 O, then add urea solution, adjust the pH value to 14, put it into a hydrothermal kettle, perform a hydrothermal reaction at 120° C. under autogenous pressure for 16 hours, wash and dry. Use nitrogen as carrier gas, control H 2 The content is 8%, and it is reduced at 200°C for 4h.

[0064] ICP test results show that the copper element content is 23.8%, and the zinc element content is 9.0%.

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Abstract

The invention provides a catalyst for hydrogenating an octenal gas phase to prepare octanol and a preparation method of the catalyst. The method comprises the following steps: breaking and sieving a waste contact generated by producing methyl chlorosilane with a direct method; and carrying out steps of roasting, dissolving with acid, and hydrothermally settling with urea to modify so as to obtain the catalyst for hydrogenating the octenal gas phase to prepare octanol. The components include copper and zinc active components and a porous silicon oxide carrier. The catalyst has the advantages that the problem of high-value comprehensive utilization of the solid residue waste contact in an organic silicon synthesizing industry is solved; the cost of raw materials is low, the operation method is simple and the industrial production is easy to realize; and compared with an impregnation method and a co-precipitation method, the grain diameter of the catalyst prepared by a urea hydrothermal settling method is smaller and the dispersity is better, so that the catalyst has higher hydrogenating activity and higher octanol selectivity and catalyzing stability, the service life of the catalyst can be greatly prolonged and the repeatability is good.

Description

technical field [0001] The invention belongs to the technical field of chemical catalysts, and relates to a catalyst for gas-phase hydrogenation of octenal to produce octanol and a preparation method thereof. Background technique [0002] As an important solvent and organic chemical raw material, octanol (2-ethylhexanol) is widely used in the production of fatty acids and various esters. At present, the industry mainly adopts the method of catalytic hydrogenation of octenal (EPA) to prepare octanol, and the gas phase hydrogenation of this method mainly uses copper-based catalysts. Copper-based catalysts have the advantages of high activity and low price, but they are easy to sinter under high temperature conditions, have poor stability, and cause some other side reactions that lead to a decrease in octanol selectivity. Therefore, the current research on hydrogenation catalysts is mainly to improve the stability of the catalyst and suppress side reactions by adding other com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80C07C31/125C07C29/141C07C29/17
Inventor 苏发兵纪永军古芳娜
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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