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A kind of highly acidic low crystallinity aluminum oxide dry glue and preparation method thereof

A technology of alumina dry glue and low crystallinity, which is applied to chemical instruments and methods, alumina/aluminum hydroxide, catalyst carriers, etc., to achieve the effects of improving acidity, good adhesiveness, and reducing usage

Active Publication Date: 2017-11-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can reduce the defect that large-pore pseudo-boehmite is not easy to form, but this method still needs to add small-pore alumina powder and adhesive during the forming process.

Method used

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  • A kind of highly acidic low crystallinity aluminum oxide dry glue and preparation method thereof
  • A kind of highly acidic low crystallinity aluminum oxide dry glue and preparation method thereof
  • A kind of highly acidic low crystallinity aluminum oxide dry glue and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Put 1 L of aluminum sulfate solution (concentration of 0.2 mol / L) in a raw material tank, and the raw material tank is placed at room temperature at 20°C; 1 L of sodium metaaluminate solution (concentration of 0.3 mol / L) in another raw material tank In the tank, the raw material tank is heated by hot water circulation to control the temperature at 80°C. Add 300 g of sodium dodecylbenzenesulfonate into the sodium metaaluminate solution while stirring, and wait for it to dissolve completely for later use.

[0024] 500mL of pure water was placed in the reaction tank as the bottom liquid, the temperature of the reaction tank was controlled to 50°C through hot water circulation, and a small amount of sodium hydroxide was added to make the pH of the solution 7.5. The sodium metaaluminate solution was injected into the reaction tank at a rate of 10 mL / min, while the aluminum sulfate solution was injected and the rate was adjusted to keep the pH value of the reaction tank solut...

Embodiment 2

[0029] Put 1 L of aluminum sulfate solution (concentration: 0.2 mol / L) in a raw material tank, and the raw material tank is kept at room temperature, with a temperature of 20°C. 1 L of sodium metaaluminate solution (concentration: 0.3 mol / L) was placed in another raw material tank, and the temperature of the raw material tank was controlled at 85 °C by hot water circulation heating. The anionic surfactant is replaced by sodium lauryl sulfate, and the addition amount is 400g, and it is set aside after being uniformly dissolved.

[0030] 600mL of pure water was placed in the reaction tank as the bottom liquid, the temperature of the reaction tank was controlled to 40°C through hot water circulation, and a small amount of sodium hydroxide was added to make the pH of the solution 8.0. The sodium metaaluminate solution was injected into the reaction tank at a rate of 15mL / min, while the aluminum sulfate solution was injected and the rate was adjusted so that the pH value of the rea...

Embodiment 3

[0033] Put 1 L of aluminum sulfate solution (concentration: 0.2 mol / L) in a raw material tank, and the raw material tank is kept at room temperature, with a temperature of 20°C. 1 L of sodium metaaluminate solution (concentration: 0.3 mol / L) was placed in another raw material tank, and the temperature of the raw material tank was controlled at 85 °C by hot water circulation heating. Replace the anionic surfactant with 90 g of potassium octadecanoate and 150 g of sodium lauryl sulfate, and wait until they are uniformly dissolved for later use.

[0034] 600mL of pure water was placed in the reaction tank as the bottom liquid, the temperature of the reaction tank was controlled to 40°C through hot water circulation, and a small amount of sodium hydroxide was added to make the pH of the solution 8.0. The sodium metaaluminate solution was injected into the reaction tank at a rate of 15 mL / min, while the aluminum sulfate solution was injected and the rate was adjusted to keep the pH...

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Abstract

The invention discloses high-acidity low-crystallinity alumina dry glue and a preparation method thereof. The alumina dry glue has the following properties: specific surface is 150-400 m<2> / g; pore volume is 0.5-1.2 cm<3> / g; average pore size is 4.0-15.0 nm; total acid content is 1.0-1.5 mmol / g; and optimal crystallinity is 5-40%. The preparation method comprises the following contents: (1) adding an anionic surfactant into an alkaline aluminium salt solution of 60-95 DEG C, and obtaining a solution I after the surfactant is completely dissolved; preparing an acidic aluminium salt solution of 10-30 DEG C as a solution II for later use; (2) adding bottom water into a reactor, adding the solution I and the solution II in parallel flow into the reactor, and conducting a neutralization reaction to obtain alumina slurry; and (3) aging the alumina slurry, washing, and drying so as to obtain the alumina dry glue powder. The alumina dry glue has characteristics of high acidity and low crystallinity, and is suitable to be used as a substitute for micropore alumina powder and an adhesive.

Description

technical field [0001] The invention relates to an alumina dry glue and a preparation method thereof, in particular to a high-acid low-crystallinity alumina dry glue and a preparation method thereof. Background technique [0002] Alumina is an important catalyst carrier and has a wide range of market applications in industrial catalysis, especially in petroleum refining and processing. Usually the carrier is obtained by molding at least two kinds of alumina dry rubber powder and adhesive. Among them, the macroporous alumina dry rubber powder mainly plays the role of reflecting the pore structure of the alumina carrier, and the small porous alumina dry rubber powder and adhesive mainly play the role of sol shaping. If the amount of small-pore alumina powder added is insufficient, the strength of the carrier will be insufficient and it will be difficult to form, while if the amount of small-pore alumina powder added is too large, the structure and properties of the carrier ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02B01J32/00B01J21/04
Inventor 孙进郭蓉周勇杨成敏段为宇姚运海丁莉刘丽
Owner CHINA PETROLEUM & CHEM CORP
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