Hydrated alumina composition and catalyst containing porous silicon aluminum material, preparation methods and hydroisomerization method
A technology of alumina hydrate and alumina trihydrate, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve secondary dust pollution, transfer difficulties, Low production efficiency and other issues, to achieve the effect of reducing operating energy consumption and simplifying the process flow
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[0103] According to the preparation method of the hydrated alumina composition of the present invention, the raw material mixture contains hydrated alumina wet gel, a porous silica-alumina material and a compound having at least two proton accepting sites. The compound having at least two proton acceptor sites and its type, as well as the porous silicon-aluminum material and its type have been described in detail above, and will not be repeated here.
[0104] The hydrated alumina wet gel can be synthesized by conventional methods, such as one or more of precipitation method (including acid method and alkali method), hydrolysis method, seed separation method and rapid dehydration method. Generally, it is obtained by optionally aging the hydrated alumina gel solution, followed by washing and solid-liquid separation.
[0105] The precipitation method includes acid method and alkali method. The acid method is to carry out precipitation reaction of aluminum salt with basic compoun...
Embodiment 1
[0231] The alumina hydrate wet gel used in this example is a quasi-alumina hydrogel solution prepared by the acid method (sodium metaaluminate-aluminum sulfate method, obtained from Sinopec Changling Branch) after washing and filtering. The wet filter cake of boehmite (the wet filter cake is coded as SLB-1), after measurement, the i value of the wet filter cake is 80.2%.
[0232] (1) In 50kg wet filter cake SLB-1, add 5.48kg amorphous silicon-alumina (sasol company, silicon oxide and aluminum oxide molecular molar ratio is 1.5, dry basis 80%), then add 10kg water and mix beating for 5 minutes, then The slurry was filtered with a belt filter to obtain 15.2 kg of wet filter cake SLBZ-1. The i value of the wet filter cake SLBZ-1 was determined to be 80.2%; after the wet filter cake SLBZ-1 was roasted at 600°C for 3 hours, it was determined that the weight ratio of alumina to amorphous silica-alumina on a dry basis was 63: 37.
[0233] (2) Put 200g of wet filter cake numbered SL...
Embodiment 2
[0244] (1) Mix 5 kg of wet filter cake numbered SLBZ-1 with 500 g of deionized water for beating for 1 minute, then send the resulting slurry into a plate and frame filter press, adjust the pressure of the plate and frame to 0.7 MPa and maintain After 15 minutes, a wet filter cake (coded as LBZ-1) was obtained. It has been determined that the i value of the wet filter cake numbered LBZ-1 is 63%.
[0245] (2) 300g of wet filter cake numbered LBZ-1 was placed in a beaker, and 4.3g of hydroxyethyl methylcellulose (purchased from Shanghai Huiguang Fine Chemical Co., Ltd., the same below) and 1.7g of scallop powder ( The content of galactomannan is 85% by weight (purchased from Beijing Chemical Reagent Company). After stirring for 10 minutes with a mechanical stirrer, the hydrated alumina composition of the present invention is obtained, and its properties are listed in Table 1.
[0246] (3) Extrude the hydrated alumina composition prepared in step (2) on an F-26 twin-screw extrud...
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