Hydrated alumina composition containing ZSM-48 type molecular sieve, catalyst, preparation methods of hydrated alumina composition containing ZSM-48 type molecular sieve, and catalyst, and hydroisomerization method
A ZSM-48, hydrated alumina technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as transfer difficulties, secondary dust pollution, increase in unqualified product volume, etc., to simplify Process flow, the effect of reducing operating energy consumption
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[0106] According to the preparation method of the hydrated alumina composition of the present invention, the raw material mixture contains hydrated alumina wet gel, ZSM-48 molecular sieve and a compound having at least two proton acceptor sites. The compound having at least two proton acceptor sites and its type, as well as the ZSM-48 molecular sieve and its type have been described in detail above, and will not be repeated here.
[0107] 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.
[0108] The precipitation method includes acid method and alkali method. The acid method is to carry out precipitation reaction of aluminum salt with basic compound. The alkali method...
Embodiment 1
[0238] 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%.
[0239] (1) Add 5.48kg H-ZSM-48 molecular sieve (product of Sinopec Catalyst Branch Jianchang Branch Company, the ratio of silicon to aluminum is 50, dry basis is 0.98) to 50kg wet filter cake SLB-1, then add 10kg water to mix Beat the pulp for 5 minutes, then filter the slurry with a belt filter to obtain 15.2kg 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 ZSM-48 molecular sieve was 58:42.
[0240] (2) Put 200g of wet filter cake numbere...
Embodiment 2
[0251] (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%.
[0252] (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.
[0253] (3) Extrude the hydrated alumina composition prepared in step (2) on an F-26 twin-screw extrud...
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