Hydrophobic surface modified aluminas and method for making thereof
AssigneeSasol (USA) Corporation
InventorsMaria Roberta Rabaioli, Anthony Mai, Ryan Loscutova
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Abstract
A method of producing a hydrophobic porous alumina by: i) providing a slurry comprising an alumina compound, the slurry having a pH equal to or greater than 7; ii) adding an organic composition comprising carboxylic acids with alkyl hydrocarbon chains having a carbon length less than 14 to the slurry to form an acidic modified slurry; the acidic modified slurry having a pH of between 3 and less than 7; iii) hydrothermally aging the acidic modified slurry to form a hydrothermally aged slurry; and iv) drying the hydrothermally aged slurry.
Claims10
A method of producing a hydrophobic porous alumina comprising the steps of:
- i) providing a slurry comprising an alumina compound, the slurry having a pH equal to or greater than 7;
- ii) adding an organic composition comprising carboxylic acids with alkyl hydrocarbon chains having a carbon length less than 10, to the slurry to form an acidic modified slurry;
- the acidic modified slurry having a pH of between 3 and less than 7;
- iii) hydrothermally aging the acidic modified slurry to form a hydrothermally aged slurry;
- and
- iv) drying the hydrothermally aged slurry.
A porous hydrophobic alumina including the following characteristics:
- i) an aspect ratio of between 1.80 and 5.0;
- ii) an average pore value between 0.55 cc/g and 2.0 cc/g;
- iii) a specific surface area of between 30_m2/g and 300 m2/g;
- and
- iv) an organic composition content between 0.5 and 10 wt. % relative to the content of alumina.
Dependencies are inferred from the claim text.