General Electric Company

Other

Sabic Innovative Plastics IP B.v.

Ashok Shyadligeri

Ramesh Krishnamurti

Vinod Kumar Rai

Debjani Kapila

Gary Charles Davis

Thomas Link Guggenheim

James Manio Silva

Farid Fouad Khouri

Jan-Pleun Lens

David Bruce Hall

Pradeep Jeevaji Nadkarni

Gurram Kishan

Edward Joseph Nesakumar

Veeraraghavan Srinivasan

Balakrishnan Ganesan

Pramod Shankar Kumbhar

Matthew Hal Littlejohn

Umesh Krishna Hasyagar

Jegadeesh Thampi

Abdul Rafi Khwaja

Nileshkumar Prakash Kukalyekar

Baraka Kawawa

A S Radhakrishna

Narain Madhavan

Radhakrishna Sreenivasarao Arakali

Composition and method of use for tannin based environmentally benign polymeric coagulants are disclosed. Tannin based coagulants are copolymers of naturally occurring tannins and a cationic monomer. One embodiment of the present invention provides for a composition, of a tannin based polymeric coagulant which is comprised of N,N-(dimethylaminoethyl) methacrylate (MADAME) polymerized using t-butylhydroperoxide and sodium metabisulfite. The resulting polyMADAME is converted to hydrochloride and then blended/reacted in an aqueous medium with tannin to obtain a homogenous poly(MADAME)-tannin composition. The method of use comprises adding an amount of the composition effective for the purpose of clarifying oily wastewater from food and beverage, steel, automotive, transportation, refinery, pharmaceutical, metals, paper and pulp, chemical processing and hydrocarbon processing industries.

Tannin based polymeric coagulants composition and method of use

Disclosed is a method for removing a neutral or an ionic guanidine compound from aqueous media optionally comprising an alkali metal halide, wherein the method is selected from the group consisting of (a) adsorption onto a carbonaceous adsorbent, (b) adsorption onto a clay adsorbent, (c) filtration through a nanofiltration membrane, and (d) removal of water and calcination.

Method for removal of guanidine compound from aqueous media

A process for forming a cycloalkylidene bisphenol comprises: reacting a cycloalkanone compound of formula:where [A] is a substituted or an unsubstituted aromatic group, R&#x2013;Rindependently represent a hydrogen or a C&#x2013;Chydrocarbyl group; and 'a' and 'b' are integers independently having values from 0&#x2013;3; with an aromatic hydroxy compound of formula [A]-OH, where [A] is as previously described; at a mole ratio of greater than or equal to about 20, in the presence of a sulfonic acid type ion exchange resin catalyst crosslinked with greater than or equal to about 8 weight percent of divinylbenzene, and a promoter selected from the group consisting of a mercaptan compound and a resorcinol compound; to form a cycloalkylidene bisphenol of formula:where [A], R&#x2013;R, &#x201c;a&#x201d; and &#x201c;b&#x201d; are as previously described. Moreover, any acid catalyst can be used with a resorcinol promoter.

Methods for preparing cycloalkylidene bisphenols

A method for purifying 1,1-bis(4&prime;-hydroxy-3&prime;-methylphenyl)cyclohexane comprises dissolving said 1,1-bis(4&prime;-hydroxy-3&prime;-methylphenyl)cyclohexane in a first solvent consisting essentially of an alcohol to form a first solution; filtering said first solution; adding a second solvent consisting essentially of water to the filtered first solution to form a second solution, wherein said second solution comprises about 40 parts to about 95 parts of the first solvent per 100 parts of the combined weight of the first and second solvents; crystallizing said 1,1-bis(4&prime;-hydroxy-3&prime;-methylphenyl) cyclohexane from said second solution to form a first crystalline product; dissolving said first crystalline product in a third solvent to form a third solution, wherein the third solvent comprises an aromatic compound; and crystallizing said 1,1-bis(4&prime;-hydroxy-3&prime;-methylphenyl)cyclohexane from said third solution to produce a second crystalline product.

Method for purifying 1,1-bis(4&prime;-hydroxy-3&prime;-methylphenyl)cyclohexane and methods of producing polycarbonates therefrom

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Bengaluru, India

Ashok Shyadligeri