Alumina supporter and preparation method thereof

An alumina carrier, alumina technology, applied in hydrogenation preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problems of strong interaction, difficult reduction and activation, small pore volume, etc., and achieve high activity and good stability. Effect

Active Publication Date: 2008-12-17
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An obvious disadvantage of co-precipitation catalysts is that the interaction between the active component and the carrier is strong, and it is not easy to reactivate before the hydrogenation reaction.
[0005] In USP 3950441 and USP 3759845, GAF Company of the United States mentioned the use of gamma-Al with low silicon content 2 o 3 Loading Ni-Cu-Mn active component is used for butynediol two-stage hydrogenation catalytic synthesis butanediol catalyst support, but the pore volume of the alumina support mentioned in the example is small, is unfavorable for the dispersion and the active component The release of hydrogenation products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 100g of the pseudo-boehmite powder prepared by the aluminum sulfate method and 100g of the pseudo-boehmite powder prepared by the carbonization method, and mix them; take 8g of zirconium oxychloride and 5g of cerium nitrate, mix them, and dissolve them in 100mL of deionized water to prepare a mixed Salt solution; take 2mL of formic acid and 2mL of nitric acid, add 50mL of deionized water to make a dilute acid solution; mix the above mixed salt solution and dilute acid solution evenly, and add it to the above mixed pseudo-boehmite powder in the form of mist with a spray device , kneaded for 20 minutes; added 15g carbon black powder and 5g scallop powder and stirred thoroughly, and finally extruded into a cylindrical shape on a molding machine; then dried at 140°C for 1 hour, and then heated in a muffle furnace at a rate of 10°C / min Raise the temperature to 750°C, keep the temperature for 2 hours, and then cool it down to room temperature naturally to obtain an alumin...

Embodiment 2

[0039] Formic acid is changed into 3g citric acid in embodiment 1, and cerium nitrate is changed into 4g lanthanum oxalate, other is with embodiment 1.

[0040] The carrier parameters are: pore volume 1.10mL / g, specific surface area 257m 2 / g, the pores with a pore diameter less than 50nm accounted for 3%, the pores with a pore diameter greater than 100nm accounted for more than 90%, the amount of B acid was 0.25mmol / g, and the amount of L acid was 0.35mmol / g.

[0041] The catalyst prepared with this carrier is used for the second-stage hydrogenation catalytic synthesis of 1,4-butanediol to 1,4-butanediol. The refined product quality indicators are as follows:

[0042] Butanediol purity: 99.4%

[0043] Carbonyl number: 0.10mg(KOH) / g

[0044] Chroma: <6APHA

[0045] Moisture: 0.03%

Embodiment 3

[0047] Weigh 150g of pseudo-boehmite powder prepared by carbonization method and 50g of pseudo-boehmite powder prepared by aluminum sulfate method, and mix; take 7g of zirconyl nitrate and 5g of titanium sulfate, mix, dissolve with 80mL deionized water to prepare a mixed Salt solution; take 2mL of tartaric acid and 1.5mL of phosphoric acid, add 70mL of deionized water to make a dilute acid solution; mix the above mixed salt solution and dilute acid solution evenly, and add it to the above mixed pseudo-boehmite powder in the form of mist with a spray device , kneading for 15 minutes; adding 20g of carbon black powder and 7g of kale powder and stirring thoroughly, and finally extruding it into a cylindrical shape on a molding machine; The heating rate was increased to 700° C., and the temperature was kept at a constant temperature for 4 hours, and then naturally cooled to room temperature to obtain an alumina carrier.

[0048] The carrier parameters are: pore volume 0.92mL / g, spec...

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Abstract

The invention provides an aluminum oxide carrier and a preparation method thereof. The aluminum oxide carrier takes a mixture prepared by mixing pseudo-boehmite powder prepared by the carbonization method and pseudo-boehmite powder prepared by the aluminum sulfate method according to a weight proportion of 1:0.1 to 5 as a precursor and a complex acid as a peptizing agent; substances such as zirconium, titanium, silicon, alkali metals, alkaline-earth metals, rare-earth metals, carbon black, and the like, are added during kneading process; then the aluminum oxide carrier is obtained after forming, drying and roasting. The physical properties of the carrier are as follows: pore volume is 0.4 to 1.2ml / g; specific surface area is 180 to 370m<2> / g; pores with the diameter being more than 100nm accounts for more than 90 percent of total pore volume; the amount of B acid is 0.1 to 0.3mmol / g; the amount of L acid is 0.2 to 0.5mmol / g. The carrier is especially applicable to the preparation of 1, 4-butanediol catalysts in the two-stage hydrogenation catalytic synthesis of 1, 4-butynediol.

Description

technical field [0001] The invention relates to an alumina carrier, in particular to an alumina carrier used in a catalyst for the two-stage hydrogenation catalytic synthesis of 1,4-butynediol to synthesize 1,4-butanediol and a preparation method thereof. Background technique [0002] Alumina has been widely used as a supported catalyst carrier in the field of heterogeneous catalysis due to its unique structural properties, surface properties and good thermal stability. [0003] The use of alumina as a catalyst carrier for the catalytic synthesis of 1,4-butanediol in the two-stage hydrogenation of 1,4-butynediol has been reported in the literature, such as: [0004] CN 1081174A Preparation of Ni-Al by co-precipitation method in Beijing Research Institute of Chemical Industry, Ministry of Chemistry and Chemical Industry 2 o 3 The catalyst is used for two-stage fixed-bed hydrogenation. An obvious disadvantage of co-precipitation catalysts is that the interaction between the...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J35/04C07C31/20C07C29/17B01J21/04B01J23/10
Inventor 赵永祥梁旭杨学英孙自瑾刘滇生梁小元张鸿喜
Owner SHANXI UNIV
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