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Clean preparation method of 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., and can solve problems such as catalyst fracture, fragmentation, and destruction, and achieve the effects of easy operation and simple preparation methods

Active Publication Date: 2015-05-27
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 includes: mixing the modified catalyst carrier components, such as macroporous alumina powder and / or amorphous silica-alumina dry rubber powder, and other extrusion aids, such as pore expanders, lubricants, etc. After fully dry mixing, add organic acid binder to form and extrude, and the orifice plate of the extruder can be cylindrical, clover, four-leaf clover or other special shapes, and then low-temperature drying, microwave treatment, high-temperature roasting activation, prepared. Hydrotreating catalyst supports.

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

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

example 1

[0035] Example 1 (Comparative Scheme)

[0036] Take 1280mL of dilute nitric acid solution (concentration is 4g nitric acid / 100mL), gradually add 720g of small-hole pseudo-boehmite (SB powder produced in Germany), after standing for 20 minutes, 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 Chenoa Company, pore volume 0.80mL / g, specific surface area 295m 2 / g, 72.1% on a dry basis), add 6g of saffron powder, 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 squeezed, extrude, extruder orifice plate 1.5mm diameter clover. The wet bar was dried at 120°C for 4 hours, then calcined at 550°C for 3 hours, code HT-1S.

example 2

[0037] Example 2 (Comparative Scheme)

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

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PUM

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Abstract

The invention relates to a clean preparation method of a hydrogenation catalyst carrier. The preparation method includes following steps: (1) preparing an organic acid solution; (2) mixing the organic acid solution with an oxide precursor to prepare a binding agent; (3) mixing the binding agent with a catalyst carrier raw material powder; and (4) performing a moulding process, a drying process, a microwave-treating process and a roasting process to obtain the catalyst carrier. Compared with a method in the prior art, the method employs the organic acid as a peptizing acid during the preparation process of the catalyst carrier. By means of increase of the concentration of the organic acid, the peptizing property is improved. Through appropriate drying and carrier roasting processes of the carrier, the catalyst carrier is ensured in strength. The method can achieve clean production of the catalyst carrier.

Description

technical field [0001] The invention relates to a preparation method of a supported hydrotreating catalyst carrier, in particular NO-free in the preparation process x A method for preparing an exhausted hydrotreating catalyst carrier. Background technique [0002] As the quality of crude oil becomes heavier and worse year by year, environmental protection regulations are becoming more and more stringent, and the market demand for clean oil products continues to grow, making the hydrogenation technology for producing clean fuels more and more widely used. Distillate hydrotreating refers to the catalytic reaction of hydrodesulfurization, hydrodenitrogenation, hydrodeoxygenation, hydrodemetallization and unsaturated hydrocarbon hydrosaturation 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 begun to generally use vacuum deep drawing technolog...

Claims

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Application Information

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Patent Type & Authority Applications(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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