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Treatment agent for removing harmful metal elements on catalyst surface and removal method thereof

A metal element and catalyst technology, applied in the field of surface harmful metal element removal and regeneration treatment process, can solve the problems of insufficient utilization and low catalyst activity, achieve efficient removal, simple and feasible method, and maintain activity and catalytic reforming performance

Active Publication Date: 2017-08-01
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no effective method to remove harmful metal elements on the surface of catalysts, so the activity of such catalysts is low and cannot be fully utilized.

Method used

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  • Treatment agent for removing harmful metal elements on catalyst surface and removal method thereof
  • Treatment agent for removing harmful metal elements on catalyst surface and removal method thereof
  • Treatment agent for removing harmful metal elements on catalyst surface and removal method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A treatment agent for removing harmful metal elements on the surface of a catalyst, which consists of the following substances in terms of mass percentage:

[0061] EDTA disodium salt 9%

[0062] Sulfamic acid or / and sulfosalicylic acid 0.5%

[0063] Polyaspartic acid or / and polyepoxysuccinic acid 0.9%

[0064] Surfactant 0.5%

[0065] The balance is water.

[0066] Catalyst iron content analysis is tested by inductively coupled plasma emission spectrometer (ICP). The test basis: JY / T 015-1996 standard, the iron content of the catalyst before and after iron removal: 0.42, 0.02%.

[0067] Table 1 is the performance data before and after the catalyst adopts the treatment agent described in Example 1 to remove harmful metal elements on the surface, wherein the black catalyst refers to the catalyst after deactivation, and "white catalyst before iron removal" refers to the catalyst after deactivation. The burnt treated catalyst, "white catalyst after iron removal" refers...

Embodiment 2

[0071] A treatment agent for removing harmful metal elements on the surface of a catalyst, which consists of the following substances in terms of mass percentage:

[0072] EDTA Disodium Salt 1%

[0073] Sulfamic acid or / and sulfosalicylic acid 5%

[0074] Polyaspartic acid or / and polyepoxysuccinic acid 0.02%

[0075] Surfactant 0.05%

[0076] The balance is water.

[0077] Catalyst iron content (ICP), before and after iron removal: 0.48%, 0.02%.

[0078] Table 2 The performance data before and after the catalyst adopts the treatment agent described in Example 2 to remove harmful metal elements on the surface, wherein the black catalyst refers to the catalyst after deactivation, and the "white catalyst before iron removal" refers to the deactivated after burning The treated catalyst, "white catalyst after iron removal" refers to a catalyst that has been deactivated and treated by charring, and a reforming catalyst obtained after removing harmful metal elements on the surface ...

Embodiment 3

[0082] A treatment agent for removing harmful metal elements on the surface of a catalyst, which consists of the following substances in terms of mass percentage:

[0083] Ethylenediammonium tetraacetate disodium salt 0.15%

[0084] Sulfamic acid or / and sulfosalicylic acid 13%

[0085] Polyaspartic acid or / and polyepoxysuccinic acid 0.01%

[0086] Surfactant 0.2%

[0087] The balance is water.

[0088] Table 3 Catalyst surface element content table (mass %)

[0089] element / week new 42 47 52 57 62 69 76 After removal CaO 0.0055 0.0091 0.0095 0.0098 0.01 0.0098 0.0096 0.01 0.0059 Fe 2 o 3

0.02 0.31 0.33 0.35 0.37 0.39 0.40 0.42 0.02 Cr 2 o 3

0.0012 0.0087 0.01 0.01 0.012 0.013 0.012 0.014 0.0031 NiO 0.0015 0.0022 0.0024 0.0027 0.0029 0.0032 0.0037 0.0039 0.0019 Cl 1.36 0.98 1.06 1.01 0.95 1.03 0.94 1.07 1.02 Pt 0.45 0.45 0.44 0.43 0.45 0.43 0.44 0.44 0.44 ...

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Abstract

The invention relates to a treatment agent of removing harmful metal elements from the surface of a catalyst, wherein the treatment agent includes following components, by mass, 0.1-10% of disodium ethylene diamine tetraacetate, 0.1-15% of sulphamic acid or / and sulfosalicylic acid, 0.005-0.1% of aspartic acid or / and polyepoxysuccinic acid, 0.01-0.5% of a surfactant and the balanced being water. The invention also relates to a method of removing the harmful metal elements from the surface of the catalyst with the treatment agent. The method is simple and available. The catalyst can be soaked completely in the treatment agent, so that the harmful metal elements in the catalyst are directly subjected to a chemical reaction with the treatment agent in liquid phase, wherein generated substances are dissolved in the treatment agent, so that the harmful metal elements can be high-effectively removed under the situation of not changing the content and distribution of the active elements on the surface of the catalyst, thereby effectively controlling the content of the harmful metal elements on the surface of the catalyst for maintaining the activity and the catalytic reforming performance of the catalyst.

Description

technical field [0001] The invention relates to a treatment agent for removing harmful metal elements on the surface of catalysts and a removal method thereof, and more specifically relates to a removal and regeneration treatment of harmful metal elements on catalyst surfaces suitable for petroleum refining and petrochemical enterprises The process is especially suitable for the removal of harmful metal elements on the surface of reforming catalysts, including but not limited to iron (Fe), chromium (Cr), nickel (Ni) and calcium (Ca). Background technique [0002] Catalytic reforming technology is one of the most important processing technologies in modern petroleum refining and petrochemical enterprises. This technology uses naphtha as raw material to produce high-octane gasoline blending components and aromatics through the catalytic action of catalysts. Chemical raw materials, while the by-product hydrogen is used in the petroleum refining process of hydrogenation and upgr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/52B01J23/96B01J23/62B01J23/63B01J27/32B01J27/135
Inventor 陈红徐永业扬苏平王庆峰董祥杰秦玉阔
Owner SINOPEC YANGZI PETROCHEM
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