Rohm and Haas Company

University of California

Crompton Gmbh

Nalco Company

Ravindranath Mukkamala

Rajiv Monohar Banavali

Hopin Hu

Dominique Baude

Carolyn Ruth Bertozzi

Aaron Daniel Martinez

Carolyn C Bertozzi

Oing Chen

Rajiv Manohar Banavali

Qing Chen

A composition containing: (a) 0.001% to 20% of at least one compound represented by formula (II), wherein Ris C&#x2013;Cdifunctional alkyl or C&#x2013;Cdifunctional aryl, and Rand Rindependently are hydrogen, alkyl, heterocyclic, aryl or aralkyl groups; and (b) crude oil. In addition to dispersing asphaltenes, the composition of the present invention typically also increases demulsibility, reduces viscosity, reduces sediment formation, reduces surface fouling and reduces corrosion.

Compounds containing amide and carboxyl groups as asphaltene dispersants in crude oil

A method for dispersing asphaltenes in a petroleum product by adding to the petroleum product 0.001% to 20% of at least one compound having formula (V) wherein Ris C&#x2013;Calkyl. In addition to dispersing asphaltenes, the method of the present invention typically also increases demulsibility, reduces viscosity, reduces sediment formation, reduces surface fouling and reduces corrosion.

Carbonyl, thiocarbonyl or imine containing compounds as asphaltene dispersants in crude oil

A method for making a compound of formula (I) wherein bonds a and b are single or double bonds, provided that one of a and b is a single bond and the other is a double bond; one of Band Bis &#x2014;CHR&#x2014;CHR&#x2014;C(Y)ZRand the other is absent; Bis hydrogen; Y is O or S; Z is O, S or NR; Ris hydrogen or C&#x2013;Calkyl; Ris hydrogen or C&#x2013;Calkyl; R, Rare independently hydrogen, alkyl, alkenyl, aryl or aralkyl. The method comprises steps of: (a) preparing an imidazolidinethione having formula by combining a cyanide source, a sulfide salt, and at least one ketone or aldehyde; and (b) adding to the imidazolidinethione, without isolation of the imidazolidinethione, CHR&#x2550;CR&#x2014;C(O)OR.

Method for production of additives for lubricating oils

A composition comprising: (a) from 0.1% to 20% of at least one cyclic compound having a nitroxyl group and a thioamide group; and (b) a lubricating oil.

Cyclic nitroxyl compounds as additives for lubricating oils

Combination of additives for lubricating oils

Quaternary ammonium salts having a tertiary alkyl group

Oil-soluble additive compositions for lubricating oils

Oil-soluble additives for lubricating oils

Novel biomimetic hydrogel materials and methods for their preparation. Hydrogels containing acrylamide-functionalized carbohydrate, sulfoxide, sulfide or sulfone copolymerized with a hydrophilic or hydrophobic copolymerizing material selected from the group consisting of an acrylamide, methacrylamide, acrylate, methacrylate, vinyl and a derivative thereof present in concentration from about 1 to about 99 wt %. and methods for their preparation. The method of use of the new hydrogels for fabrication of soft contact lenses and biomedical implants.

Biomimetic hydrogel materials

Growing community of inventors

Houston, TX, United States of America

Ravindranath Mukkamala