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Regeneration method of deactivated catalyst

A technology for deactivating catalysts and catalysts, applied in catalyst regeneration/reactivation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of molecular sieve structure damage, metal platinum aggregation, large solvent consumption, etc., to avoid damage and improve dispersion. , to avoid the effect of aggregation

Active Publication Date: 2016-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of solvent used in this method is too large, and the macromolecular by-products in the detergent are also difficult to separate.
Moreover, this method first uses an organic solvent to remove part of the easy-to-remove coke to reduce the heat released during charcoal regeneration, but ultimately still requires a high-temperature charcoal burning process, and there are still problems encountered by isomerization dewaxing catalysts during high-temperature regeneration. , especially the aggregation of metal platinum and the destruction of the molecular sieve structure

Method used

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  • Regeneration method of deactivated catalyst
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  • Regeneration method of deactivated catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of Catalyst E-1 of the Invention.

[0041] Add 1450mL of organic solvent (the volume ratio of ethanol and benzene is 2:1) into a 2000mL flask to treat 200mL of deactivated catalyst FD-1 after industrial operation, and the number of the catalyst after distillation for 2.0h is Ca-1.

[0042] Take 120g of Ca-1 catalyst, add 14.4g of zinc nitrate (Zn content 5.0wt%) solution for impregnation, and prepare a Zn-containing sample with an atomic ratio of Zn to Pt of 4:1, and then perform programmed charcoal burning in an air atmosphere , the specific steps are to raise the temperature to 250°C for 10 hours at a heating rate of 3°C / min, and then continue to raise the temperature to 410°C for 3 hours at a heating rate of 3°C / min. The obtained catalyst is numbered Ea-1.

[0043] The above-mentioned catalyst Ea-1 was reduced in a hydrogen atmosphere, and the specific conditions were: the hydrogen pressure was 3.5 MPa, the reduction temperature was 430° C., and the reduc...

Embodiment 2

[0047] Preparation of Catalyst E-2 of the Invention.

[0048] Add 1450mL of organic solvent (the volume ratio of ethanol and benzene is 1:1) into a 2000mL flask to treat 200mL of deactivated catalyst FD-1 after industrial operation, and the catalyst number after distillation for 2h is Ca-2.

[0049]Take 120g of Ca-2 catalyst, add 8.8g of zinc acetate (Zn content 10.0wt%) solution for impregnation, and prepare a Zn-containing sample, wherein the atomic ratio of Zn to Pt is 5:1, and then perform program control in an air atmosphere For charcoal burning, the specific steps are to raise the temperature to 230°C for 10 hours at a heating rate of 3°C / min, and then continue to raise the temperature to 420°C for 3 hours at a heating rate of 3°C / min. The obtained catalyst is numbered Eb-1.

[0050] The above-mentioned catalyst Eb-1 was reduced in a hydrogen atmosphere, and the specific conditions were: the hydrogen pressure was 4.5 MPa, the reduction temperature was 480° C., and the re...

Embodiment 3

[0054] Preparation of Catalyst E-3 of the Invention.

[0055] Add 1450mL of organic solvent (the volume ratio of gasoline and kerosene is 1:1) into a 2000mL flask to treat 200mL of deactivated catalyst FD-1 after industrial operation, and the number of the catalyst after distillation for 2h is Cb-1.

[0056] Take 120g of Cb-1 catalyst, add 70.5g of zinc nitrate (Zn content 2.0wt%) solution for impregnation, and prepare a Zn-containing sample, wherein the atomic ratio of Zn to Pt is 8:1, and then perform program control in an air atmosphere For charcoal burning, the specific steps are to raise the temperature to 280°C for 8 hours at a heating rate of 3°C / min, and then continue to raise the temperature to 350°C for 5 hours at a heating rate of 3°C / min. The obtained catalyst is numbered Ec-1.

[0057] The above-mentioned catalyst Ec-1 was reduced under a hydrogen atmosphere, and the specific conditions were: the hydrogen pressure was 2.5 MPa, the reduction temperature was 450° C....

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Abstract

The invention discloses a regeneration method of a deactivated catalyst. The catalyst comprises a TON type molecular sieve and VIII noble metal components. A regeneration process comprises the steps of firstly, treating the deactivated catalyst with an organic solvent, and then loading zinc on the treated catalyst, wherein the atom ratio of the zinc to platinum is (10 to 1) to (1 to 1); under the action of oxygen-containing gas, performing programmed-controlled carbon burning, wherein the highest temperature of the carbon burning process is 450 DEG C or below, and performing reduction treatment on the treated catalyst in hydrogen atmosphere; and soaking the catalyst after the reduction treatment with a dilute acid solution containing chitosan in vacuum environment or inert atmosphere, and finally, performing drying and roasting so as to obtain the catalyst of which the activity is restored. The method disclosed by the invention not only can effectively remove carbon deposits at low temperature, guarantees the pore structure of the catalyst to be free from damage, but also can enable noble metal to be well dispersed, and performance of the regenerated catalyst can be well restored.

Description

technical field [0001] The present invention relates to a regeneration method of a deactivated catalyst, more specifically, to a regeneration method of a hydroisomerization catalyst containing precious metals and TON molecular sieves, especially a regeneration method of a paraffin hydrocarbon hydroisomerization catalyst , especially suitable for the catalyst regeneration method used in the hydroisomerization dewaxing process of lubricating oil. Background technique [0002] Isomerization dewaxing technology is mainly used in the hydrogenation treatment of diesel oil, wax oil and other special oil products to achieve the purpose of reducing the content of normal paraffins and improving the quality of oil products. This technology is also of great significance for improving the low-temperature fluidity of diesel oil. Generally speaking, the wax content in straight-run diesel oil or secondary processed diesel oil is high, so its freezing point or cold filter point is unqualifi...

Claims

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Application Information

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IPC IPC(8): B01J29/90B01J29/74B01J29/80B01J38/52B01J38/56B01J38/60B01J38/62B01J38/02B01J38/10
Inventor 徐会青刘全杰贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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