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Catalyst for oxidation of mercaptan in light oil products and its preparation method and application

A technology for mercaptan oxidation and light oil products, which is applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. Process insecurity and other problems, to achieve the effect of safe preparation process, not easy to run off, and improved stability

Active Publication Date: 2017-01-25
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of patent CN1206322 and patent CN1234809 are that both use nitric acid as a solvent in the catalyst preparation process, which is neither safe nor environmentally friendly; the catalyst preparation method is an impregnation method, and the preparation process is cumbersome; the catalyst involved in the patent CN1234809 only Capable of converting all mercaptans in light oils with mercaptan content up to 150ppm

Method used

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  • Catalyst for oxidation of mercaptan in light oil products and its preparation method and application
  • Catalyst for oxidation of mercaptan in light oil products and its preparation method and application
  • Catalyst for oxidation of mercaptan in light oil products and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Catalyst C-1:

[0035] Weigh 21.30g Co(NO 3 ) 2 ·6H 2 O, 6.80g (NH 4 ) 2 · MoO 4 , 11.50g Bi(NO 3 ) 3 ·5H 2 O, 14.60gLa(NO 3 ) 3 ·6H 2 O, 6.00 g of citric acid was added to 40 ml of deionized water, mechanically stirred and heated to 80° C., and a solution A containing four active components of cobalt, molybdenum, bismuth, and lanthanum was prepared in one step.

[0036] Mix 33.00g of light magnesia, 45.50g of pseudo-boehmite, and 3.00g of scallop powder as a powdery solid compound, add solution A, knead evenly; extrude into strips.

[0037] Leave at room temperature to dry naturally. By means of gradient heating, the temperature was raised from 20°C to 120°C over 1 hour, kept at 120°C for 1 hour, then raised to 300°C over 1 hour, kept at constant temperature for 1 hour, finally raised to 550°C, and calcined for 2 hours to obtain catalyst C-1. See Table 1 for the mass percentages of active components and carrier components in the prepared catalyst, and see ...

Embodiment 2

[0040] Catalyst C-2:

[0041] Weigh 19.40gCo(NO 3 ) 2 ·6H 2 O, 8.17g (NH 4 ) 2 · MoO 4 , 14.60gBi (NO 3 ) 3 ·5H 2 O, 15.90gLa(NO 3 ) 3 ·6H 2 O, 6.00 g of citric acid was added to 40 ml of deionized water, mechanically stirred and heated to 80° C., and a solution A containing four active components of cobalt, molybdenum, bismuth, and lanthanum was prepared in one step.

[0042] Mix 30.00g of light magnesia, 46.00g of pseudoboehmite, and 3.00g of scallop powder as a powdery solid compound, add solution A, knead evenly; extrude into strips.

[0043] Leave at room temperature to dry naturally. By means of gradient heating, the temperature was raised from 20°C to 120°C over 1 hour, kept at 120°C for 1 hour, then raised to 300°C over 1 hour, held at the temperature for 1 hour, finally raised to 550°C, and calcined for 4 hours to obtain catalyst C-2. See Table 1 for the mass percentages of active components and carrier components in the prepared catalyst, and see Table 2 f...

Embodiment 3

[0046] Catalyst C-3:

[0047] Weigh 17.50gCo(NO 3 ) 2 ·6H 2 O, 8.85g (NH 4 ) 2 · MoO 4 , 12.50gBi (NO 3 ) 3 ·5H 2 O, 10.6gLa(NO 3 ) 3 ·6H 2 O, 6.00 g of citric acid was added to 40 ml of deionized water, mechanically stirred and heated to 80° C., and a solution A containing four active components of cobalt, molybdenum, bismuth, and lanthanum was prepared in one step.

[0048] Mix 35.00g of light magnesia, 44.00g of pseudoboehmite, and 3.00g of scallop powder as a powdery solid compound, add solution A, knead evenly; extrude into strips.

[0049] Leave at room temperature to dry naturally. By means of gradient heating, the temperature was raised from 20°C to 120°C over 1 hour, kept at 120°C for 1 hour, then raised to 300°C over 1 hour, held at the temperature for 1 hour, finally raised to 500°C, and calcined for 3 hours to obtain catalyst C-3. See Table 1 for the mass percentages of active components and carrier components in the prepared catalyst, and see Table 2 ...

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Abstract

The invention belongs to the technical field of mercaptan oxidation, and particularly relates to an oxidation and conversion catalyst for mercaptan in light oil, as well as a preparation method and application of the oxidation catalyst. According to the catalyst disclosed by the invention, the active components are Co, Mo, Bi and La quaternary active components, and the carrier is a magnesium-aluminum composite carrier. The catalyst is appropriate in specific surface, specific pore volume, activity and stability; in the mercaptan-removing oxidation process, the liquid alkali is not required to be added, so that the discharge of exhausted lye can be avoided; in the preparation process, nitric acid is not required to be added, so that the preparation technology is safer and more environment-friendly; in the preparation process, compared with the impregnation method, the adopted mixing and kneading method is simple, convenient and feasible; the active components are uniformly dispersed and low in probability of running off; meanwhile, the addition of the metal element Bi improves the alkalinity of the catalyst; the evaluation of the prepared catalyst indicates that the oxidation activity to the mercaptan and the stability of the catalyst are obviously improved; the catalyst is suitable for continuous production technology of a fixed bed, and can completely oxidize mercaptan in the light oil; the catalyst passes the doctor test, and the copper corrosion testing of the catalyst is qualified.

Description

technical field [0001] The invention belongs to the technical field of mercaptan oxidation, and in particular relates to a mercaptan oxidation catalyst in light oil products and a preparation method and application thereof. Background technique [0002] Light oil products include naphtha, catalytic gasoline, straight-run aviation kerosene, lamp kerosene, diesel oil, etc. Light oil products contain a considerable amount of sulfur compounds, among which mercaptans (RSH) have the greatest impact on oil quality. It not only makes light oil produce stench, but also affects the stability of oil. In addition, in the case of high temperature, mercaptan is also corrosive, and its existence will cause the copper sheet corrosion of light oil products to be unqualified, and will cause the doctoral test of gasoline and aviation kerosene to fail, and the product quality cannot be guaranteed. Unable to pass the factory. Therefore, in the oil processing process, the oil must be deodorize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887C10G27/04
Inventor 侯磊楚庆岩孙强杨忠梅何宗华孟宪谭
Owner CHINA PETROLEUM & CHEM CORP
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