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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AI-Extracted 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 ...

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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.

Application Domain

Catalyst carriersPreparation by hydrogenation +1

Technology Topic

Aluminium saltsCarbon black +11

Examples

Experimental program(6)

Example Embodiment

[0030] Example 1

[0031] Take 100 g each of pseudo-boehmite powder prepared by aluminum sulfate method and pseudo-boehmite powder prepared by carbonization method, mix well; take 8 g of zirconium oxychloride and 5 g of cerium nitrate, mix, dissolve with 100 mL of deionized water to prepare a mixture Salt solution; take 2mL formic acid and 2mL nitric acid, add 50mL deionized water to make a dilute acid solution; mix the above mixed salt solution and dilute acid solution evenly, and add the above mixed pseudoboehmite powder in mist form with a spray device , knead for 20 minutes; add 15g carbon black powder and 5g succulent powder and stir well, and finally extrude into a cylindrical shape on a molding machine; then dry at 140 ° C for 1 hour, and then heat up in a muffle furnace at a temperature of 10 ° C/min The rate of heating was increased to 750°C, and the temperature was kept constant for 2 hours, and then cooled to room temperature naturally to obtain an alumina carrier.

[0032] The carrier parameters are: pore volume 0.93mL/g, specific surface area 241m 2 /g, pores with a pore diameter less than 50 nm accounted for 5%, pores with a pore diameter greater than 100 nm accounted for more than 93%, the amount of B acid was 0.15 mmol/g, and the amount of L acid was 0.30 mmol/g.

[0033] The catalyst prepared by this carrier is used for the two-stage hydrogenation of 1,4-butynediol to catalyze the synthesis of 1,4-butanediol. The quality indicators of the product after purification are as follows:

[0034] Butanediol purity: 99.6%

[0035] Number of carbonyl groups: 0.11mg(KOH)/g

[0036] Chroma: <6APHA

[0037] Moisture: 0.02%

Example Embodiment

[0038] Example 2

[0039] The formic acid in Example 1 was changed to 3 g of citric acid, and the cerium nitrate was changed to 4 g of lanthanum oxalate, and the others were the same as in Example 1.

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

[0041] The catalyst prepared by this carrier is used for the two-stage hydrogenation of 1,4-butynediol to catalyze the synthesis of 1,4-butanediol. The quality indicators of the product after purification are as follows:

[0042] Butanediol purity: 99.4%

[0043] Number of carbonyl groups: 0.10mg(KOH)/g

[0044] Chroma: <6APHA

[0045] Moisture: 0.03%

Example Embodiment

[0046] Example 3

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

[0048] The carrier parameters are: pore volume 0.92mL/g, specific surface area 270m 2 /g, pores with a pore diameter less than 50 nm accounted for 3%, pores with a pore diameter greater than 100 nm accounted for more than 95%, the amount of B acid was 0.12 mmol/g, and the amount of L acid was 0.28 mmol/g.

[0049] The catalyst prepared by this carrier is used for the two-stage hydrogenation of 1,4-butynediol to catalyze the synthesis of 1,4-butanediol. The quality indicators of the product after purification are as follows:

[0050] Butanediol purity: 99.3%

[0051] Number of carbonyl groups: 0.15mg(KOH)/g

[0052] Chroma: <6APHA

[0053] Moisture: 0.03%

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PUM

Property	Measurement	Unit
Pore volume	0.93	ml/g
Specific surface area	0.05 ~ 2.41	m²/g
Acidity	0.3	mmol/g
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Inhibitors of serine protease activity methods and compositions for treatment of nitric oxide-induced clinical conditions

InactiveUS20040220239A1High activityRecognize utilityBiocidePeptide/protein ingredientsNitric oxideChemistry

Owner:BIO HLDG

Classification and recommendation of technical efficacy words

Good stability
High activity

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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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