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A kind of composite carrier catalyst for propane conversion to propylene and preparation method thereof

A composite carrier and catalyst technology, used in catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc. Good regeneration performance, good industrial application prospects, and the effect of reducing side reactions of cracking

Active Publication Date: 2020-03-31
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patents CN101108362A, CN101066532A, CN101972664A, CN102389831A, CN101380587A, and CN101513613A all use molecular sieves as carriers to prepare propane dehydrogenation propylene catalysts through element modification, and the propane dehydrogenation activity in the patents is higher than Al 2 o 3 There have been some improvements, but most of them have not fully covered the core issues of catalysts in actual industrial production: single-pass service life, renewable performance, and wear issues, and these issues are one of the prerequisites for the industrial application of catalysts.

Method used

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  • A kind of composite carrier catalyst for propane conversion to propylene and preparation method thereof
  • A kind of composite carrier catalyst for propane conversion to propylene and preparation method thereof
  • A kind of composite carrier catalyst for propane conversion to propylene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Weigh a certain amount of SBA-15 molecular sieve in a three-neck flask, add a certain concentration of aluminum nitrate and zinc nitrate and stir fully at 90°C for 12-24h, wash and filter with distilled water, dry at 120°C, and finally place in a calciner Calcined at 550°C for 5h to obtain doped Al(5)-Zn(3)-SBA-15 molecular sieve, which was recorded as component A; then weighed a certain amount of β-gibbsite and calcined at 800°C 4h to obtain component B; finally, mix the above two components A and B in a certain proportion and set aside.

[0028] 2) After mixing the weighed compounds of the first, second and third components, add 1mo / L aqueous HCl solution to dissolve to form a mixed solution.

[0029] 3) The mixed solution in step 2) was added to the powder in step 1), and 5% dilute nitric acid was added to form a sol, which was stirred at 70° C. for 8 hours. The solid content in the sol was 40%.

[0030] 4) Spray-dry the sol in step 3) to obtain a fine powder, an...

Embodiment 2

[0034] 1) Weigh a certain amount of SBA-15 molecular sieve in a three-neck flask, add a certain concentration of aluminum nitrate and zinc nitrate and stir fully at 90°C for 12-24h, wash and filter with distilled water, dry at 120°C, and finally place in a calciner Calcined at 550°C for 5 hours to obtain doped Al(4)-Zn(2)-SBA-15 molecular sieve, which was recorded as component A; then weighed a certain amount of β-gibbsite and calcined at 850°C 5h to obtain component B; finally, mix the above two components A and B in a certain proportion and set aside.

[0035] 2) After mixing the weighed compounds of the first, second and third components, add 0.5mo / L aqueous HCl solution to decompose to form a mixed solution.

[0036] 3) The mixed solution of step 2) was added to the powder of step 1), and 3% dilute nitric acid was added to form a sol, which was stirred at 90° C. for 8 hours, and the solid content in the sol was 50%.

[0037] 4) Spray-dry the sol in step 3) to obtain a fin...

Embodiment 3

[0041] 1) Weigh a certain amount of SBA-15 molecular sieve in a three-neck flask, add a certain concentration of aluminum nitrate and zinc nitrate and stir fully at 90°C for 12-24h, wash and filter with distilled water, dry at 120°C, and finally place in a calciner Calcined at 550°C for 5h to obtain doped Al(10)-Zn(2)-SBA-15 molecular sieve, which was recorded as component A; then weighed a certain amount of β-gibbsite and calcined at 900°C 4h to obtain component B; finally, mix the above two components A and B in a certain proportion and set aside.

[0042] 2) After mixing the weighed compounds of the first, second and third components, add 0.3 mol / L HF aqueous solution to decompose to form a mixed solution.

[0043] 3) The mixed solution of step 2) was added to the powder of step 1), and 6% dilute nitric acid was added to form a sol, which was stirred at 60° C. for 12 hours, and the solid content in the sol was 30%.

[0044] 4) Spray-dry the sol in step 3) to obtain a fine ...

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Abstract

The invention discloses a composite carrier catalyst for preparing propylene by adopting propane conversion and a preparation method for the composite carrier catalyst. The catalyst is prepared from 50%-90% of Al-doped SBA-15 molecular sieves, 10%-40% of iota-Al2O3, 0.1%-0.6% of an active component, 0.1%-4.0% of modifiers and the balance adhesive. The modifier comprises a first modifier containingany one of Cu and Sn modified elements, a second modifier containing any one of La, Ce, Ag and Zr modified elements, and a third modifier containing any one of Sr, Ba, Ca and K modified elements, thecontent of each modifier is greater than 0%, and the mass percentage sum of all the components is 100%. The catalyst is good in intensity, and has good dehydrogenation activity and stability in the process of propane dehydrogenation.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a composite carrier catalyst for converting propane to propylene and a preparation method of the catalyst. Background technique [0002] Propylene is one of the important basic organic chemical raw materials and occupies an important position in the modern petroleum and chemical industry. Its global consumption is as high as 90 million tons, of which 58% is used for the manufacture of polypropylene, and about 10%, 8%, 7% and 6% for the manufacture of acrylonitrile, oxo alcohol, propylene oxide and cumene, respectively. . With the rapid growth of demand for polypropylene derivatives in various industries, the demand for propylene is also increasing year by year. Therefore, efficient, reasonable and industrial-scale new technologies for increasing propylene production have become an urgent need for my country and global chemical companies. [0003] Considering economics and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03B01J37/08B01J37/02B01J37/16C07C5/333C07C11/06
CPCB01J29/0325B01J37/0018B01J37/0201B01J37/16B01J2229/18C07C5/3335C07C11/06Y02P20/52
Inventor 韩伟潘相米王科吴砚会艾珍程牧曦李博
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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