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Regeneration method of deactivated catalyst

A deactivated catalyst and catalyst technology, applied in catalyst regeneration/reactivation, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as difficult separation of macromolecular by-products, molecular sieve structure damage, metal platinum accumulation, etc. Hydrogen/dehydrogenation reactivity, improvement of dispersion, effects of avoiding damage

Active Publication Date: 2017-01-04
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
  • Regeneration method of deactivated catalyst
  • Regeneration method of deactivated catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of Catalyst E-1 of the Invention.

[0032] Add 1450ml of organic solution into a 2000ml flask (the volume ratio of ethanol and benzene is 2:1), and deactivate the Pt / ZSM-22 deactivation catalyst (FD-1, Carbon content is 7.24wt%), and the catalyst number after 2 hours of distillation is Ea-1.

[0033] Take 100g of Ca-1 catalyst, add 15g of nickel nitrate (nickel content 3.0wt%) solution for impregnation, and prepare a nickel-containing sample with an atomic ratio of Ni to Pt of 3:1, and then heat up at a rate of 3°C / min. The temperature was kept at 250°C for 10 hours, and then the temperature was raised to 410°C for 3 hours at a rate of 3°C / min to obtain the catalyst E-1 of the present invention.

Embodiment 2

[0035] The preparation of catalyst E-2 of the present invention

[0036] Take 100g of Ea-1 catalyst, add 10g of nickel acetate (8.0wt% nickel content) solution for impregnation to prepare a nickel-containing sample, wherein the atomic ratio of Ni to Pt is 5:1, and then the temperature is increased at a rate of 3°C / min , heated to 240°C for 10 hours, and then continued to heat up to 420°C for 3 hours at a rate of 3°C / min. The obtained catalyst was numbered Eb-1. Its physical and chemical properties are shown in Table 2, and the results are shown in Table 3

Embodiment 3

[0038] The preparation of catalyst E-3 of the present invention

[0039] Add 1450ml of organic solvent (the volume ratio of gasoline and kerosene is 1:1) into a 2000ml flask to treat the deactivated catalyst FD-1 after industrial operation, and the catalyst number after 2 hours of distillation is Cb-1.

[0040] Take 120g of Cb-1 catalyst, add 50g of nickel sulfate (Ni content 2.0wt%) solution for impregnation to prepare a nickel-containing sample, wherein the atomic ratio of Ni to Pt is 6:1, and then increase the temperature at a rate of 3°C / min , heated to 280° C. for 8 hours, and then continued to heat up to 350° C. for 5 hours at a rate of 3° C. / min to obtain the catalyst E-3 of the present invention. Its physical and chemical properties are shown in Table 3, and the reaction results are shown in Table 4.

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Abstract

The invention discloses a regeneration method for a deactivated catalyst. The deactivated catalyst comprises a TON type molecular sieve acidic component and a group-VIII metal component. The regeneration method comprises the following steps: treating a carbon-deposited deactivated catalyst with an organic solution at first; then loading a nickel-containing compound by using an impregnation method, wherein the atomic ratio of added nickel to metal platinum in the catalyst is 6:1 to 1:1; and finally, carrying out charking so as to obtain a regenerated catalyst with recovered activity. Compared with the prior art, the regeneration method of the invention has the following advantages: carbon deposit can be effectively removed at a low temperature; the pore structure of the catalyst can be protected from destroy; accumulation of precious metals is avoided; the precious metals are well dispersed; so the reactive performance of the regenerated catalyst can be restored to the reactive performance level of a fresh catalyst. The method is particularly suitable for regeneration of deactivated hydroisomerization dewaxing catalysts.

Description

technical field [0001] The invention relates to a regeneration method of a deactivated catalyst. More specifically, the present invention relates to a regeneration method of a paraffin hydrocarbon shape-selective isomerization 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 unqualified, which reduces the yield of diesel oil. Hydroisomerization can effectively convert n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/90B01J29/76B01J38/00
Inventor 徐会青贾立明王伟刘全杰
Owner CHINA PETROLEUM & CHEM CORP