Uop Lcc

Raymond Shih

Alakananda A Bhattacharyya

Andrea G Bozzano

Hayim Abrevaya

Erin Marie Broderick

Avram Michael Buchbinder

Francis Stephen Lupton

Joel T Walenga

Jan De Ren

Carl John Stevens

Nina I Kuznetsova

Shurong Yang

Rodrigo J Lobo

Evan B Jorgenson

Tatsamai Jarusiripipat

A process is provided of treating a feed comprising polyethylene terephthalate comprising dissolving said feed in a polar solvent at a temperature between about 100 to 250&#xb0; C. to produce a dissolved feed; then adding an anti-solvent that is less polar than said polar solvent followed by cooling a resulting mixture resulting in precipitation of purified polyethylene terephthalate and then separation of solid purified polyethylene terephthalate from remaining liquids.

Solvent based approach to post-consumer recycling of polyethylene terephthalate

Processes and apparatuses for producing polymer particles with a solid state polycondensation reactor and an underwater pelletization unit. The apparatuses use a pre-conditioning zone to adjust a temperature, crystallization in addition to dust, acetaldehyde and water content of the particles from a crystallization bin. Various inert gas streams can be provided from a purification unit to remove dust, acetaldehyde, water and adjust temperature and crystallinity of the particles, as also move the particles. The precondition zones have stages that allow for the particles to accurately achieve the desired SSP reactor inlet conditions.

Processes and apparatuses for conditioning polymer particles for an SSP reactor

A process for oxidizing and crystallizing alkyl aromatics is described. The solvent and operating conditions are controlled to maintain the aromatic carboxylic acid in solution in the reaction zone, and the aromatic carboxylic acid is crystallized in a downstream crystallizer, resulting in reduced impurity levels in the product.

Oxidation and crystallization process for aromatic carboxylic acid production

Processes have been developed for oxidizing alkyl aromatic compounds, and which reduce the amount of 4-CBA in the solid oxidation products. The process can reduce the makeup amount of ionic liquid, carboxylic acid, catalyst, bromine source, and ammonia source.

Process for controlling reaction and crystallization solvent composition in process for production of aromatic carboxylic acid

Methods and apparatus for producing terephthalic acid using a p-xylene stream enriched with p-toluic acid are described. The apparatus includes first and second reactor zones. The reactor zones can be in the same reactor or in different reactors.

Process for producing terephthalic acid

A process for oxidizing an alkyl-aromatic compound is described. The process includes oxidizing the alkyl-aromatic compound to produce a first oxidation product; contacting at least a portion of the first oxidation product, a solvent comprising an ionic liquid, a bromine source, a catalyst, and an oxidizing agent to produce a second product comprising a mother liquor and at least one of an aromatic alcohol, an aromatic aldehyde, an aromatic ketone, and an aromatic carboxylic acid; and adding at least a portion of the mother liquor in the contacting step.

Process for oxidizing alkyl-aromatic compounds

A process for oxidizing an alkyl-aromatic compound is described. The process includes contacting the alkyl-aromatic compound, a solvent comprising an ionic liquid, a bromine source, a catalyst, and an oxidizing agent in a first reaction zone to produce a first product comprising a first mother liquor and at least one of an aromatic alcohol, an aromatic aldehyde, an aromatic ketone, and an aromatic carboxylic acid.

Growing community of inventors

Elgin, IL, United States of America

Raymond Shih