Phosphorous-containing hydrated alumina composition and molded body, preparation method and application thereof, catalyst and preparation method thereof
A technology of hydrated alumina and alumina trihydrate, which is applied in chemical instruments and methods, physical/chemical process catalysts, catalyst carriers, etc., can solve problems such as difficult transfer, molding interference, and high water content, so as to improve the working environment and avoid Effect of dust pollution and simple process
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[0120] According to the preparation method of the hydrated alumina composition of the present invention, in a more preferred embodiment, the compound having at least two proton acceptor sites contains galactomannan and cellulose ether. The shaped bodies formed from the composition according to this more preferred embodiment have higher strength. Further preferably, the compound having at least two proton acceptor sites is preferably galactomannan and cellulose ether.
[0121] In this more preferred embodiment, based on the total amount of the compound having at least two proton acceptor sites, the content of the galactomannan may be 10-70% by weight, preferably 15% by weight. -68% by weight, more preferably 20-65% by weight; the content of the cellulose ether may be 30-90% by weight, preferably 32-85% by weight, more preferably 35-80% by weight.
[0122] The content of the phosphorus-containing compound in the raw material mixture can be selected according to the content of p...
Embodiment 1
[0260] The hydrated alumina wet gel used in this example is to add sodium phosphate to the hydrated alumina gel solution prepared by the acid method (sodium metaaluminate-aluminum sulfate method, obtained from Sinopec Changling Branch) during the aging process , the phosphorus-containing pseudo-boehmite wet filter cake (this wet filter cake is numbered as SLB-1) obtained after washing with a belt filter, after determination, the i value of this wet filter cake is 77.6%, expressed as P 2 o 5 The calculated phosphorus content is 3% by weight.
[0261] (1) Put 240g of wet filter cake numbered SLB-1 in a beaker, then add 6g of methyl cellulose (purchased from Zhejiang Haishen Chemical Co. The content of sugar is 80% by weight, purchased from Beijing Chemical Reagent Company, the same below), and after stirring with a mechanical stirrer for 10 minutes, the obtained mixture is the phosphorus-containing hydrated alumina composition of the present invention, and its property parameters...
Embodiment 2
[0266] Adopt the same method as Example 1 to prepare alumina dry strips and catalysts, the difference is that in step (4), the hydrated alumina dry strips prepared in step (3) are calcined at 980° C. in an air atmosphere for 3 hours to obtain The properties and parameters of alumina dry strip OT-2 are listed in Table 1.
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