Abstract: 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° 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.

Abstract: 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° 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.

Abstract: 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.

Abstract: 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.

Abstract: Processes for recovering para-xylene from a para-xylene separation zone that receives two or more feed streams with different para-xylene amounts. One of the feed streams may have an equilibrium amount while the second may have a high amount. A fractionation column provides the effluent stream with para-xylene which may be a high purity stream that can be fed to the para-xylene separation zone in its entirety. If heavier compounds need to be removed from the second feed stream, a split shell or divided wall column may be used.

Abstract: 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.

Abstract: 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.

Abstract: Processes have been developed to obtain recycle ionic liquid streams which are active for oxidation of 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.

Abstract: A process for oxidizing alkyl aromatic compounds is described. The alkyl aromatic compound is oxidized producing an aromatic carboxylic acid, and an aromatic amide compound. The aromatic amide compound is then hydrolyzed with a hydrolyzing agent to the aromatic carboxylic acid.

Abstract: 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.

Abstract: 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.

Abstract: A process for transalkylation is described. The process operates at a lower pressure than a typical transalkylation processes, and provides higher benzene purity with comparable or lower ring loss compared to the typical transalkylation process. The xylene selectivity is comparable to or higher than the standard process, and the ethyl benzene selectivity is comparable to or lower than the standard process.

Abstract: 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.