Chemical synthesis of boehmite
AssigneeIran University of Science and Technology
InventorsMostafa Mahinroosta, Ali Allahverdi
Life of this patent
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Abstract
A method for producing boehmite under atmospheric pressure may include producing a sodium aluminate solution by dissolving sodium aluminate in water. The method may further include producing an aluminum hydroxide gel by mixing a hydrochloric acid solution with the sodium aluminate solution. The method may further include producing an aluminum chloride solution by mixing a hydrochloric acid solution with the aluminum hydroxide gel. The method may further include producing saturated aluminum chloride solution by heating the aluminum chloride solution. The method may further include producing a boehmite gel by mixing an ammonia solution with the saturated aluminum chloride solution and heating the boehmite gel to produce boehmite.
Claims20
A method for producing boehmite under atmospheric pressure,
- the method comprising:
- producing a sodium aluminate solution by dissolving sodium aluminate in water, wherein a concentration of the sodium aluminate solution is between 1 mol/L and 5 mol/L;
- producing an aluminum hydroxide gel by mixing a hydrochloric acid solution with the sodium aluminate solution, wherein a volume ratio of the hydrochloric acid solution and the sodium aluminate solution is between 1:1 and 3:1 (the hydrochloric acid solution:
- the sodium aluminate solution);
- producing an aluminum chloride solution by mixing a hydrochloric acid solution with the aluminum hydroxide gel with a volume ratio between 1:1 and 3:1 (the hydrochloric acid solution:the aluminum hydroxide gel);
- producing a saturated aluminum chloride solution by heating the aluminum chloride solution at a temperature between 50° C. and 95° C.;
- producing a boehmite gel by mixing an ammonia solution with the saturated aluminum chloride solution with a weight ratio between 2:1 and 4:1 (the ammonia solution:the saturated aluminum chloride solution);
- and
- heating the boehmite gel at a temperature between 140° C. and 220° C.
A method for producing boehmite under atmospheric pressure, the method comprising:
- producing a sodium aluminate solution by dissolving sodium aluminate in water;
- producing an aluminum hydroxide gel by mixing a hydrochloric acid solution with the sodium aluminate solution;
- producing an aluminum chloride solution by mixing a hydrochloric acid solution with the aluminum hydroxide gel;
- producing a saturated aluminum chloride solution by heating the aluminum chloride solution;
- producing a boehmite gel by mixing an ammonia solution with the saturated aluminum chloride solution;
- and
- heating the boehmite gel.
Dependencies are inferred from the claim text.