Abstract:
Phosphorus-containing ligands are recovered from mixtures comprising 3-pentenenitrile (3PN) and adiponitrile (ADN), using liquid-liquid extraction. ADN is produced by hydrocyanation of 3PN. The ADN is hydrogenated to produce a hexamethyiene diamine (HMD) and at Ieast one byproduct including bis-hexamethylene triamine (BHMT) or 1,2-diaminocyclohexane. At Ieast a portion of the HMD product or byproduct is used to enhance the liquid-liquid extraction to recover phosphorus-containing ligand.
Abstract:
An improved fiber tow and process for forming the same is disclosed. The fiber tow may include a plurality of mechanically crimped fibers with a primary crimp having a saw tooth crimp shape. For fiber tows comprising fibers with denier per filament of greater than about 5, the plurality of mechanically crimped fibers have an average crimp take-up of greater than about 40%. For fiber tows comprising fibers with denier per filament of less than about 5, the plurality of mechanically crimped fibers have an average crimp take-up of greater than about 30%.
Abstract:
Thermoplastic fibers with an additive that yields modified and/or reactive groups on the surface of the fiber are provided. Also provided are methods for production and articles of manufacture containing these thermoplastic fibers. In addition, methods and products with enhanced soil resistance are provided.
Abstract:
This document describes biochemical pathways for producing adipyl-[acp] and either hexanoic acid or acetic acid from a long chain acyl-[acp] such as dodecanoyl-[acp] or octanoyl-[acp] using a polypeptide having pimeloyl-[acp] synthase activity and biochemical pathways for converting adipyl-[acp] and/or hexanoic acid to one of more of adipic acid, 6-aminohexanoic acid, 6-hydroxyhexanoic acid, hexamethylenediamine, caprolactam, and 1,6-hexanediol.
Abstract:
Included are elastomeric fibers and method for preparing such fibers, which include a bio-derived butanediol. The bio-derived butanediol is used to prepare a polymeric glycol composition, which is contacted with a diisocyanate and spun to provide an elastomeric fiber.
Abstract:
A woven fabric comprising a base yarn and a secondary yarn, wherein the secondary yarn is interwoven into the base yarn, and wherein the secondary yarn has a melting point that is lower than the melting point of base yarn. Also disclosed is a method of making a base yarn and a secondary yarn, wherein the secondary yarn is interwoven into the base yarn, and wherein the secondary yarn has a melting point that is lower than the melting point of base yarn.
Abstract:
Disclosed are counter-current reaction columns with improved pressure drop and temperature profiling. Such improvements result in a higher IV prepolymer. The improvements over prior art designs include reducing the length to diameter ratio of the cylindrical section of the column while maintaining the same active volume, and / or including an external heat exchanger. Further, inert gas flowrate and prepolymer residence time is increased.
Abstract:
Included are segmented polyurethane elastic fibers or spandex fibers, capable of bonding to polymer fiber such as nylon or polyamide fibers, in addition to bonding to itself, for apparel textile applications. More particularly the invention relates to bicomponent spandex fibers, with a heat resistant core and a heat sensitive sheath, spun from polymer solutions. The nylon fabrics containing such spandex fibers have enhanced stretch performance and improved surface appearance after heat treatment to activate the fusing and bonding between nylon fibers and spandex fibers.
Abstract:
This document describes biochemical pathways for producing glutaric acid, 5-aminopentanoic acid, 5-hydroxypentanoic acid, cadaverine or 1,5-pentanediol by forming one or two terminal functional groups, comprised of carboxyl, amine or hydroxyl group, in a C5 backbone substrate such as D-proline.
Abstract:
This document describes biochemical pathways for producing one or more of pimelic acid, 7-aminoheptanoic acid, 7-hydroxyheptanoic acid, heptamethylenediamine and 1,7-heptanediol by forming one or two terminal functional groups, comprised of carboxyl, amine or hydroxyl groups, in a C7 aliphatic backbone substrate produced from succinate semialdehyde or pyruvate. These pathways, metabolic engineering and cultivation strategies described herein rely on the aldol condensation of succinate semialdehyde and pyruvate.