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Preparation method of pseudo-boehmite

A pseudo-boehmite and reaction kettle technology, applied in chemical instruments and methods, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of small product pore volume, unable to meet the needs of heavy oil or residual oil hydrogenation catalyst, etc. Low water consumption, low cost and large pore volume for washing

Active Publication Date: 2020-01-03
山东金滢新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The above inventions adopt measures in the aging and washing process in order to obtain larger crystal grains and lower impurity content, and the obtained products have small pore volumes, which cannot meet the needs of heavy oil or residual oil hydrogenation catalysts.

Method used

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  • Preparation method of pseudo-boehmite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Al 2 o 3 Calculated as 150gAl 2 o 3 / L, sodium metaaluminate solution with a caustic ratio of 1.35, the concentration is Al 2 o 3 Calculated as 50gAl 2 o 3 The aluminum sulfate solution of / L and the ammonium carbonate solution that pH value is 8.5 stand-by;

[0039] Add 500mL of deionized water to the 5000mL reactor, start the heating and stirring equipment, when the temperature of the deionized water in the reactor reaches 60°C, add Al to the reactor at a flow rate of 30mL / min 2 o 3 Calculated as 50gAl 2 o 3 / L of aluminum sulfate solution, while adding Al 2 o 3 Calculated as 150gAl 2 o 3 / L of sodium metaaluminate solution, by adjusting the flow rate of sodium metaaluminate solution, the pH value of the slurry in the reactor is controlled to 8.5, and the temperature of the slurry in the reactor is kept constant at 60°C. After the reaction time is 75min, the reaction is completed, and the slurry is solid-liquid Separation, separate 2300mL of mother liquo...

Embodiment 2

[0041] Others are the same as in Example 1, except that the ammonium carbonate solution is changed to a urea solution with a pH of 7.6, and the pH of the slurry in the neutralization reactor is controlled to be 7.6 to obtain pseudo-boehmite A-2 of the present invention, which is roasted at 600°C for 4 The physical and chemical properties after hours are shown in Table 1.

Embodiment 3

[0043] Others are the same as in Example 1, except that the ammonium carbonate solution is changed to an ammonium bicarbonate solution with a pH of 8.0, and the pH of the slurry in the neutralization reaction kettle is controlled to be 8.0 to obtain pseudo-boehmite A-3 of the present invention. The physical and chemical properties after 4 hours of calcination are shown in Table 1.

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Abstract

The invention relates to a preparation method of pseudo-boehmite. The method comprises the following steps: preparation of a slurry through a neutralization reaction, mother liquor separation of the slurry, pulping of a filter cake, heating, aging, filtering separation, washing and drying. After the mother liquor is separated from the slurry, the filter cake is pulped in a solution which has a certain pH value and contains ammonium ions and carbonate ions or bicarbonate ions, and then is heated to the aging temperature. The method has the advantages of simple process, and easiness in operation.

Description

technical field [0001] The invention relates to a catalytic material and a preparation method thereof, in particular to a preparation method of pseudo-boehmite suitable as a carrier material for heavy oil or residual oil hydrogenation catalyst, and belongs to the field of petrochemical industry. Background technique [0002] There are many types of alumina such as γ-Al 2 o 3 , η-Al 2 o 3 , θ-Al 2 o 3 、δ-Al 2 o 3 and α-Al 2 o 3 etc., where γ-Al 2 o 3 Due to its large specific surface area, adjustable pore structure and good thermal stability, it has a very wide range of applications in the field of catalysis, especially in the field of catalytic hydrogenation. Preparation of γ-Al 2 o 3 The usual method is to prepare pseudo-boehmite first, and then roast it at a certain temperature to convert it into γ-Al 2 o 3 . Pseudo-boehmite generally has three preparation methods in industry: [0003] (1) Neutralization reaction of aluminate and acid, such as carbonizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J32/00C10G49/02
CPCB01J21/04C10G49/02
Inventor 金江涛王林学姜峰金凤华姜利尹虎何林涛
Owner 山东金滢新材料有限公司