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A clean preparation method for hydrogenation catalyst carrier

A technology for hydrogenation catalysts and catalyst carriers, which is applied in the direction of catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problems of catalyst breakage, fragmentation, and inability to meet preparation requirements, and achieves simple and easy preparation methods. The effect of the operation

Active Publication Date: 2017-07-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the weak acidity of clean organic acids, the mechanical strength of catalysts or supports prepared with conventional acid / oxide ratios often cannot meet the actual use requirements of fixed-bed catalysts
The strength of the organic acid is enhanced by increasing the concentration, but because the organic acid and part of the water are decomposed and volatilized at the same time during the roasting process, a strong impact is formed on the support structure and the structure is destroyed, causing the catalyst to break or even break during the process, which cannot meet the requirements. preparation requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation process of the catalyst carrier of the present invention comprises: modifying the catalyst carrier components such as macroporous alumina powder and / or amorphous silica-alumina colloidal powder, and other extrusion aids, such as pore-enlarging agents, lubricants, etc. After fully dry mixing, add organic acid binder to shape and extrude. The orifice of the extruder can be cylindrical, clover, four-leaf clover or other special shapes, and then dry at low temperature, microwave treatment, and high-temperature roasting to activate. Hydrotreating catalyst support.

[0027] The preparation process of the catalyst carrier of the present invention will be described in detail below.

[0028] 1) Prepare an organic acid solution, weigh 1320g of oxalic acid (oxalic acid) white crystals, dissolve it in distilled water stirred at a constant temperature of 50°C, and stir for 20 minutes to prepare a transparent 5000mL organic acid solution with a pH value of about 0.9. ...

example 1

[0035] Example 1 (comparison scheme)

[0036] Take 1280mL dilute nitric acid solution (concentration: 4g nitric acid / 100mL), gradually add 720g small-pore pseudo-boehmite (SB powder produced in Germany), after standing still for 20min, stir evenly to form a white translucent paste, stand still at room temperature After 8h, the adhesive was prepared. Take 580g of macroporous alumina (produced by Tianjin Chenoya Company, with a pore volume of 0.80mL / g and a specific surface area of ​​295m 2 / g, dry basis 72.1%), add 6g of scallop powder, and add 562.9g of binder, roll for 30 minutes, add an appropriate amount of distilled water to make the mixture into a paste that can be extruded, extruded, extruded machine orifice 1.5mm clover in diameter. The wet strips were dried at 120°C for 4 hours, and then calcined at 550°C for 3 hours, numbered HT-1S.

example 2

[0037] Example 2 (comparison scheme)

[0038] The dilute nitric acid solution in Example 1 was replaced with acetic acid solution (concentration: 13.2g acetic acid / 100mL), and the others were the same as in Example 1 to prepare a carrier, numbered HT-2S.

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PUM

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Abstract

The invention relates to a clean preparation method for a hydrogenation catalyst carrier, comprising: preparing an organic acid solution; mixing the organic acid solution with an oxide precursor to prepare an adhesive; mixing the adhesive with catalyst carrier raw material powder, and then performing molding, drying, microwave treatment and roasting to obtain the catalyst carrier. Compared with the prior art, the present invention uses an organic acid as the peptizing acid in the preparation process of the catalyst carrier, improves the peptization by increasing the concentration of the organic acid, and ensures the strength of the catalyst carrier through a suitable carrier drying and roasting process to achieve clean production of catalyst supports.

Description

technical field [0001] The invention relates to a preparation method of a loaded hydrotreating catalyst carrier, especially NO NO-free during the preparation process x Process for the preparation of vented hydrotreating catalyst supports. Background technique [0002] As the quality of crude oil becomes heavier and worse year by year, environmental protection regulations become increasingly strict, and the market demand for clean oil products continues to grow, making hydrogenation technology for the production of clean fuels more and more widely used. Distillate oil hydrotreating refers to the catalytic reaction of hydrodesulfurization, hydrodenitrogenation, hydrodeoxygenation, hydrodemetallization and unsaturated hydrocarbon hydrogenation of raw oil and hydrogen on the catalyst surface under high temperature and high pressure. Due to the deterioration of crude oil quality year by year, and in order to improve economic benefits, refineries have generally adopted crude oil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/04C10G49/02
Inventor 杜艳泽关明华王凤来
Owner CHINA PETROLEUM & CHEM CORP
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