Sasol Performance Chemicals Gmbh

Sasol (usa) Corporation

Sasol Gmbh

Maria Roberta Rabaioli

Ryan Loscutova

Anthony Mai

Umesh Chaudhary

Bharat Kumar

Luke Andrew Tatum

A method of producing new hydrophobic aluminas by The new hydrophobic aluminas have surface modified structures distinguished by a low humidity content and very small nanoparticles. These new hydrophobic aluminas can be uniformly dispersed in a substrate, for example polymers.

Hydrophobic surface modified aluminas for polymer compositions and method for making thereof

A method of producing new hydrophobic aluminas by i) providing a slurry comprising an alumina compound, the slurry having a pH of above 5.5; ii) mixing an organic composition comprising carboxylic acids with long hydrocarbon chains with the slurry to form an acid modified slurry; iii) hydrothermally conditioning the acid modified slurry to form a hydrothermally aged slurry; and iv) drying the hydrothermally aged slurry. The new hydrophobic aluminas have surface modified structures distinguished by a low humidity content and very small nanoparticles. These new hydrophobic aluminas can be uniformly dispersed in a substrate, for example polymers.

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.

Hydrophobic surface modified aluminas and method for making thereof

A process for producing alumina, the process having a seeding phase and a precipitation phase. During the seeding phase a seed mixture is produced by adding an aluminium salt to an aqueous solution and then adding an alkaline metal aluminate to the mixture while maintaining the seed mixture at generally neutral pH. The precipitation phase produces precipitated alumina by simultaneously adding aluminium salt and alkaline metal aluminate to the seed mixture while maintaining a pH from 6.9 to 7.8. The recovered precipitated alumina has at least one, preferably all the following characteristics: i) a crystallite size of 33-42 Ang.: in the (120) diagonal plane (using XRD); ii) a crystallite d-spacing (020) of between 6.30-6.59 Ang.; iii) a high porosity with an average pore diameter of 115-166 Ang.; iv) a relatively low bulk density of 250-350 kg/m; v) a surface area after calcination for 24 hours at 1100&#xb0; C. of 60-80 m/g; and vi) a pore volume after calcination for one hour at 1000&#xb0; C. 0.8-1.1 m/g.

Precipitated alumina and method of preparation

A method of producing functionalized surface-modified alumina by adding an organic modifier comprising acrylic acid to alumina and drying the alumina to covalently bond the organic modifier to the surface of the alumina. The functionalized surface-modified alumina being uniformly dispersible in organic polymer to form single crystallites of functionalized surface-modified alumina in the polymer.

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Westlake, LA, United States of America

Maria Roberta Rabaioli