Preparation method of highly dispersed iron oxide loaded sulfate radical ionic solid superstrong acid
A sulfate ion, solid super acid technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the troublesome and long industrialization, generally takes several days or weeks, and the molar ratio is different. Easy to control and other problems, to achieve the effect of easy control and simple operation
Inactive Publication Date: 2018-12-07
李云军
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[0005] "SO 4 2- / Fe 2 o 3 Preparation of type solid superacid and research on esterification catalytic activity", Huang Wei et al., Journal of Petrochemical Universities, 2002, Volume 15, No. 1, published FeSO 4 ·7H 2 O direct roasting to prepare SO 4 2- / Fe 2 o 3 Type solid superacid, although the steps of this method are simple, but SO 4 2- and Fe 2 o 3 The molar ratio is not easy to control, and it is impossible to obtain nano-scale solid superacid
The prior art also adopts the sol-gel method to prepare nano-scale solid superacids, but the preparation period of this type is long, generally requiring several days or weeks, which brings troubles to industrialization
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Embodiment 1
[0023] Take 20g FeCl 3 ·6H 2 O is placed in a conical flask and dissolved with 100mL of water, the conical flask is placed on a constant temperature magnetic stirrer, and 1ml of ethylene glycol is added as a dispersant, stirred, and a concentration of 28% ammonia water is added at a constant temperature of 70°C , stirred vigorously to make the pH of the system = 8-9, after complete precipitation, stand still for 24 hours, filter with suction, wash the precipitate with distilled water until there is no chloride ion, dry, grind, and pass through a 200-mesh sieve to obtain FeO(OH) 2 The precursor; with 50mL0.5mol / L (NH 4 ) 2 S0 4 The aqueous solution impregnated the precursor, impregnated for 14 hours, filtered, dried, and roasted in a muffler furnace at 500°C for 3 hours to obtain the solid superacid Fe 2 o 3 / SO 4 2- , the powder is brownish yellow and stored in a desiccator.
[0024] Such as figure 1 As shown, the Fe prepared above 2 o 3 / SO 4 2- The solid superac...
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Abstract
The invention discloses a preparation method of highly dispersed iron oxide loaded sulfate radical ionic solid superstrong acid. The preparation method comprises the following steps: (1) adding ethylene glycol as a dispersant into a FeCl3 aqueous solution, uniformly mixing the mixture, then adding ammonia water till the pH is 9, leaving the mixture to stand for 24 hours, carrying out suction filtration, washing a precipitate till no chlorine ion is available, drying the mixture, and grinding the mixture to powder; (2) impregnating the powder obtained in the step (1) with an ammonium sulfate solution, carrying out suction filtration and drying; and (3) activating the powder processed in the step (2) at 500 DEG C to obtain the highly dispersed iron oxide loaded sulfate radical ionic solid superstrong acid. Compared with the prior art, the method is simple to operate and easy to control, and can be used for obtaining the highly dispersed nanoscale Fe2O3 / SO4<2-> solid superstrong acid.
Description
technical field [0001] The invention relates to a preparation method of highly dispersed iron oxide loaded sulfate ion type solid superacid. Background technique [0002] Solid super acid has extremely high acid strength -16.02<H 0 <-14.520, equivalent to 10,000 times of 100% liquid sulfuric acid, is the acid type catalyst with the highest acid strength among solid acids, but has no corrosion to equipment. High catalytic activity, lower catalytic temperature than molecular sieve catalysts. [0003] As a catalyst, it has strong water resistance and alkali resistance. It has no obvious effect on the activity of the catalyst under high temperature and alkaline water vapor conditions. The aftertreatment of liquid acid products is simpler, and it is a kind of green environmental protection catalyst advocated in the 21st century. [0004] Fe 2 o 3 / SO 4 2- The solid superacid is SO 4 2- / MxOy type solid super acid, the formation of its acid center is mainly from SO ...
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IPC IPC(8): B01J27/053
CPCB01J27/053B01J35/23
Inventor 李云军
Owner 李云军