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Aluminum oxide carrier, preparation method of catalyst containing aluminum oxide carrier, and application of catalyst

An alumina carrier and catalyst technology, applied in the field of chemistry, can solve the problems of low catalyst stability, frequent regeneration, deactivation of carbon deposits, etc., so as to improve the conversion rate of alkane dehydrogenation and olefin selectivity, and improve the activity and stability. , the effect of strong charcoal capacity

Pending Publication Date: 2019-03-29
杨斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is that the existing catalysts have low stability, fast deactivation, short reaction cycle, frequent regeneration, and are easily deactivated by carbon deposition under high temperature and acidic carrier environment, and the stability, activity and selectivity cannot meet the requirements. Increasing demand for use

Method used

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  • Aluminum oxide carrier, preparation method of catalyst containing aluminum oxide carrier, and application of catalyst
  • Aluminum oxide carrier, preparation method of catalyst containing aluminum oxide carrier, and application of catalyst
  • Aluminum oxide carrier, preparation method of catalyst containing aluminum oxide carrier, and application of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Carrier preparation: Take 60 grams of pseudoboehmite, 6 grams of methylcellulose, 4 grams of starch, 4 grams of hexamethylenetetramine, and 6 grams of urea, add an appropriate amount of deionized water and stir to form alumina with a mass content of 25%. Continue stirring for 2 hours, slowly add 21.5 g of nitric acid solution with a mass concentration of 25%, and stir at 35° C. for 2 hours to form an alumina sol slurry. Drop the alumina sol into a hot oil column with liquid paraffin as the oil phase and an oil bath temperature of 85°C for molding, collect the formed pellets under the oil column, transfer them to an aging kettle for aging at 120°C for 12 hours, then wash with water, and dry at 130°C for 8 hours . Place the dried molded carrier in a high-temperature furnace, raise the temperature to 1000°C at a rate of 1.5°C / min and keep the temperature constant for 8 hours. 4h. The prepared alumina carrier is θ- and δ-mixed crystal form, with a specific surface area of...

Embodiment 2

[0044] Carrier preparation: Take 70 grams of pseudoboehmite, 5 grams of polyacrylamide, 5 grams of methylcellulose, and 10 grams of urea, add an appropriate amount of deionized water and stir to form a suspension with a mass content of alumina of 35%, and continue Stir for 2 hours, slowly add 10 g of nitric acid solution with a mass concentration of 35%, and stir for 2 hours at 50° C. to form an alumina sol slurry. Add 30 grams of boehmite and 10 grams of gibbsite into the alumina sol, mix well, add 10 grams of scallop powder, 2 grams of 35% nitric acid, mix and knead, extrude into strips, and dry at 130°C for 8 hours. Place the dried molded carrier in a high-temperature furnace, raise the temperature to 1050°C at a rate of 2°C / min and keep the temperature constant for 4 hours. 6h. The prepared alumina support is θ- and δ-mixed crystal form, with a specific surface area of ​​125m 2 / g, the pore volume is 0.65ml / g, the average pore diameter is 34nm, and the ratio of pores wit...

Embodiment 3

[0047] Preparation of the carrier: the preparation of the carrier is the same as in Example 1, except that transformer oil is used as the oil phase.

[0048] Catalyst preparation: Weigh 0.29 g of potassium hydroxide and 1.48 g of potassium nitrate, add 40 ml of deionized water to make an impregnation solution, then weigh 45 g of the above-mentioned alumina carrier for equal volume impregnation, age at room temperature for 2 h, dry at 120 ° C for 4 h, and 600 The catalyst precursor containing potassium was obtained by calcining for 6 h under an air atmosphere at ℃. Weigh 19 grams of chromium nitrate and 10 grams of chromium trioxide, add 13ml of deionized water to make an impregnation solution to impregnate the catalyst precursor containing potassium, age at room temperature for 2 hours, dry at 120°C for 4 hours, and roast at 600°C for 6 hours in an air atmosphere to obtain the finished catalyst c.

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Abstract

The invention discloses an aluminum oxide carrier, a preparation method of a catalyst containing the aluminum oxide carrier, and application of the catalyst. The aluminum oxide carrier is prepared from the following raw materials of aluminum stone, methylcellulose and an ingredient A. The invention also discloses the preparation method of the aluminum oxide carrier, and the catalyst containing thealuminum oxide carrier. The catalyst is prepared from the following raw materials of 40 to 55 mass parts of the aluminum oxide carriers (preferably 45 mass parts of the aluminum oxide carriers), 10 to 30 mass parts of an ingredient B and 1 to 10 mass parts of an ingredient C. The invention also discloses the preparation method of the catalyst containing the aluminum oxide carrier. The catalyst has dehydrogenation activity and has the advantages of high selectivity, slow inactivation, high carbon accumulation resistant capability and the like in the dehydrogenation reaction process.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to an alumina carrier, a method for preparing a catalyst containing an alumina carrier and an application of the catalyst. Background technique [0002] Low-carbon olefins are very important organic chemical raw materials, especially ethylene, propylene, and isobutene are considered to be the basic raw materials of modern petrochemical industries. Low-carbon olefins are generally obtained in the form of co-production or by-products. For example, currently about 70% of the world's propylene comes from steam cracking to ethylene co-production, and 28% of propylene comes from the by-product of catalytic cracking units in refineries. With the further development of the chemical industry and the plastic products industry, the demand for low-carbon olefins is increasing rapidly, while the traditional naphtha cracking and catalytic cracking production processes and devices can no longer meet the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/26C07C11/06C07C11/09C07C5/333
CPCC07C5/3335B01J23/26Y02P20/52
Inventor 杨斌
Owner 杨斌
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