Catalyst for synthesizing melamine and preparation method thereof
A melamine and catalyst technology, which is applied in the field of synthesis of melamine catalyst and its preparation, can solve the problems of harsh reaction conditions, high investment costs, and long reaction process, and achieve the effects of short induction period, low reaction temperature, and simple preparation method
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Embodiment 1
[0025] (1) Weigh 555g of silicon powder, add 1000g of water, and stir evenly;
[0026] (2) Take by weighing 462g pseudo-boehmite, add in the slurry in step (1), add hydrochloric acid solution to adjust the pH value to about 3.2;
[0027] (3) Take by weighing 200g silica sol and 682g phosphoraluminum glue, add in the slurry in step (2), add 434g water again, fully stir;
[0028] (4) Spray molding with LX-15 centrifugal spray tower, then roast, wash and dry to prepare melamine catalyst, denoted as M-A.
Embodiment 2
[0030] (1) Weigh 611g of silicon powder, add 1050g of water, and stir evenly;
[0031] (2) Take by weighing 385g pseudo-boehmite, add in the slurry in step (1), add nitric acid solution to adjust the pH value to about 3.2;
[0032] (3) Take by weighing 909g aluminum sol, add in the slurry in step (2), add 378g water again, fully stir;
[0033] (4) Spray molding with LX-15 centrifugal spray tower, then roast, wash and dry to prepare melamine catalyst, denoted as M-B.
Embodiment 3
[0035] (1) Weigh 667g silicon powder, add 1100g water, stir evenly;
[0036] (2) Take by weighing 308g pseudo-boehmite, add in the slurry in step (1), add hydrochloric acid solution to adjust the pH value to about 3.2;
[0037] (3) Take by weighing 200g silica sol and 682g aluminum sol, add in the slurry in step (2), add 376g water again, fully stir;
[0038] (4) Spray molding with LX-15 centrifugal spray tower, and then prepare melamine catalyst through roasting, washing and drying, denoted as M-C.
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