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Preparation method of eggshell hydrogenation catalyst

A hydrogenation catalyst and eggshell-type technology, which is applied in the field of preparation of eggshell-type hydrogenation catalysts, can solve the problems of affecting the service life of the catalyst and the low strength of the catalyst, and achieve the effect of reducing the loss of pore volume and specific surface and expanding the pores Good, cost reduction effect

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of this catalyst is that due to the use of hollow silica as a carrier, it will inevitably lead to a lower strength of the catalyst, which will affect the service life of the catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of carrier

[0032] Weigh 300 grams of commercially available pseudo-boehmite powder, add 8 grams of fenugreek powder, 6 grams of carbon black, 4 grams of dilute nitric acid, mix well and add appropriate amount of deionized water and dibrominated-N,N-di(di 8 grams of methyl dodecyl) propylene diammonium, kneaded at room temperature for 30 minutes to become a plastic body, and extruded into a four-leaf clover strip on an extruder. Dry the wet strip in a drying oven at 110°C for 4 hours, and keep the temperature in a roasting furnace at 650°C for 4 hours to obtain an alumina carrier;

[0033] (2) Preparation of catalyst

[0034] Prepare impregnation solution: add ammonium molybdate, nickel nitrate and phosphoric acid into water to dissolve, then add Tween 20 to adjust the pH value to 4.0 to obtain an impregnation solution, in which MoO 3 The content of NiO is 22.1 g / 100ml, the content of NiO is 5.3g / 100ml, the content of phosphorus is 2.1 g / 100ml, and th...

Embodiment 2

[0037] (1) Preparation of carrier

[0038] Weigh 300 grams of commercially available pseudo-boehmite powder, add 9 grams of fenugreek powder, 8 grams of carbon black, 6 grams of dilute nitric acid, mix well and add appropriate amount of deionized water and N,N-dimethylcarboxybetaine 10 Knead at room temperature for 30 minutes to form a plastic body, and extrude into four-leaf clover strips on an extruder. Dry the wet strip in a drying oven at 120°C for 4 hours, and keep the temperature at 680°C in a roasting furnace for 3.5 hours to obtain an alumina carrier.

[0039] (2) Preparation of catalyst

[0040] The method is the same as in Example 1, the pH value of the impregnating solution is 4.5, and the MoO in the impregnating solution 3 The content of NiO is 22.1 g / 100ml, the content of NiO is 5.3g / 100ml, the content of phosphorus is 2.1 g / 100ml, the content of Tween 40 is 5.0g / 100ml, and the number of the obtained catalyst is B.

Embodiment 3

[0042] (1) Preparation of carrier

[0043] Weigh 300 grams of commercially available pseudo-boehmite powder, add 9 grams of fenugreek powder, 8 grams of carbon black, 5 grams of dilute nitric acid, mix well and add appropriate amount of deionized water and, 1,3-Ditetradecyl- 12 grams of N,N-dimethylammonium bromide-2-propanol were kneaded at room temperature for 30 minutes to form a plastic body, and extruded into four-leaf clover strips on an extruder. The wet strip was dried in a drying oven at 120°C for 4 hours, and kept at a constant temperature of 700°C in a roasting furnace for 3 hours to obtain an alumina carrier.

[0044] (2) Preparation of catalyst

[0045] The method is the same as in Example 1, the pH value of the impregnating solution is 3.5, and the MoO in the impregnating solution 3 The content of 22.1g / 100ml, WO 3 The content of NiO is 10.0 g / 100ml, the content of NiO is 5.3g / 100ml, the content of phosphorus is 3.5 g / 100ml, the content of polyethylene glycol ...

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PUM

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Abstract

The invention discloses a preparation method of an eggshell hydrogenation catalyst. The method consists of: mixing an alumina precursor with a gemini surfactant and an adhesive uniformly, conducting mixing and kneading to obtain a catalyst carrier, then dipping the carrier in a dipping solution containing a thickening agent under the condition of introducing air to undergo bubbling, and then performing drying and roasting, thus obtaining the eggshell hydrogenation catalyst. The method provided in the invention can effectively regulate the surface active metal shell thickness and active metal dispersity of the eggshell hydrogenation catalyst, also can stabilize the active metal components on the hydrogenation catalyst, reduce loss of the active metal components, as well as reduce the catalyst production cost.

Description

technical field [0001] The invention relates to a preparation method of an eggshell-type hydrogenation catalyst, which can be used to prepare residual oil hydrodesulfurization and denitrogenation catalysts, and can also be used to prepare heavy distillate oil hydrogenation treatment catalysts, and can also be used for petroleum wax processing Hydrogen refining catalyst. Background technique [0002] Residual oil fixed bed hydrogenation technology can effectively remove impurities such as metals, sulfur, nitrogen and residual carbon in residual oil through hydrogenation, and provide high-quality feed for catalytic cracking. In recent years, with the continuous exploitation of crude oil, the quality of crude oil has become increasingly serious, and the demand for oil products has increased day by day. In order to meet the increasing demand for oil products, more suitable catalysts must be developed. [0003] The cost of catalyst production depends largely on the content of a...

Claims

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Application Information

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IPC IPC(8): B01J23/883B01J23/888C10G45/08
Inventor 张艳侠袁胜华张皓王鼎聪高鹏付秋红
Owner CHINA PETROLEUM & CHEM CORP
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