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
CN106673032BActive Publication Date: 2017-11-24CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2017-11-24

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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