Distillation: processes, separatory inventions 12/07

20070295592 - Method for improving a piperazine colour stability: The present invention relates to a process for improving the color stability by postpurifying piperazine, the steps comprising preparing an aqueous piperazine solution by introducing solid or liquid piperazine having a degree of purity of at least 90% by weight in water; removing the water by distillation; isolating the piperazine... Agent: Connolly Bove Lodge & Hutz, LLP

20070284240 - System and method for diagnosing and troubleshooting amine regeneration system: A system for optimized operation and troubleshooting/diagnosis of an amine regeneration system comprising a flash tank, a rich/lean heat exchanger, a still, a reflux condenser, a reflux accumulator, a pump, a reboiler, and a pump bypass line to the flash tank.... Agent: Mchale & Slavin, P.A.

20070278086 - Device and method for removing mercury from residues: Device (1) for removing mercury from mercury-containing residues (6), comprising a gastight screw (2) conveyor provided with an inlet (5) for mercury-containing residues (6), first heating means for heating admitted mercury-containing residues and causing mercury to evaporate, an outlet conduit (7) for mercury vapour-containing gas and an outlet channel (10)... Agent: Pillsbury Winthrop Shaw Pittman, LLP Eric S. Cherry - Docketing Supervisor

20070278087 - Azeotrope-like compositions of 1,1,1,3,3-pentafluorobutane and hydrogen fluoride: The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the production of HFC-365. The latter is useful as a nontoxic, zero ozone depleting fluorocarbon useful as... Agent: Honeywell International Inc.

20070278088 - Plant and method for vacuum distillation of hydrocarbon liquids: A vacuum distillation system and method utilizing an auxiliary, low capacity vacuum producing ejector operated in parallel with a primary ejector during the winter months enables significant reduction in the absolute pressure of a vacuum distillation column. Operation of a vacuum distillation tower at lower absolute pressures results in increased... Agent: Chevron Corporation