Alumina-zirconia-titania composite carrier and its preparation method

A composite carrier, zirconia technology, applied in catalyst carriers, chemical instruments and methods, hydrocarbons, etc., can solve the problem of low dispersion of catalyst active component Pd, high catalyst surface acidity, specific surface and pore size distribution unsuitable for catalysts requirements, etc., to achieve the effect of improving the ability to resist heavy metal poisoning, low surface acidity, and avoiding the reduction of activity
CN102989518BActive Publication Date: 2014-12-24PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2014-12-24

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Abstract

The invention discloses an alumina-zirconia-titania composite carrier and its preparation method. 100% by mass of the alumina-zirconia-titania composite carrier comprises 1-95% by mass of alumina, 5-60% by mass of zirconia and 5-60% by mass of titania, the physical properties of the alumina-zirconia-titania composite carrier comprise a bulk density of 0.7-1.1g / ml, a pore volume of 0.2-0.6ml / g, a specific surface area of 3-60m<2> / g and an average aperture of 50-300nm, and two peaks of the alumina-zirconia-titania composite carrier appear at 40-120nm and 200-400nm respectively. The invention also discloses the preparation method of the alumina-zirconia-titania composite carrier, and a hydrogenation catalyst containing the alumina-zirconia-titania composite carrier.
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Description

technical field

[0001] The invention relates to a carrier and a preparation method thereof, in particular to an alumina-zirconia-titania composite carrier and a preparation method thereof. Background technique

[0002] The pyrolysis gas produced in the steam cracking process of petroleum hydrocarbons often contains a small amount of impurities such as acetylene, propyne and propadiene, and their existence will affect the high-efficiency polyethylene and polyethylene used in the homogeneous polymerization and copolymerization processes in the subsequent sections to varying degrees. Propylene catalyst. According to the requirements of polyethylene, ethylene propylene rubber, polypropylene and other post-processing procedures, the mole fraction of acetylene in polymer grade ethylene must be lower than 5ppm, and the mole fraction of acetylene in ethylene must be lower than 1ppm in the production of ethylene glycol. Catalytic selective hydrogenation is the most widely used and m...

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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