Distillation: processes, separatory inventions 03/09

20090078558 - Novel method for producing (meth)acrylic acid and (meth)acrylic esters: There is provided a method for rectifying a vinyl compound liquor, comprising the steps of: a) providing a rectification column operated at a temperature and pressure; b) feeding the vinyl compound liquor to be rectified into the rectification column; characterized in that the pressure of said rectification column and the... Agent: Hamre, Schumann, Mueller & Larson, P.C.

20090071812 - System and method for removing moisture from liquid desiccant: A system and method for removing water from a liquid desiccant such as a glycol used to dry cooled air in order to restore the desiccant to a purity up to around 97% in a closed continuous flow process. Liquid desiccant can be sprayed into cooled air in a conditioner... Agent: Timothy J. Haller Niro, Scavone, Haller & Niro

20090071813 - Method for chemically reacting and separating a mixture in a column: Processes for chemical reaction and separation in a column comprising, (a) providing one or more reactants to a column; and (b) carrying out at least partially superimposed reactive distillation and extractive distillation on the one or more reactants in the column to form a reaction product mixture comprising at least... Agent: Connolly Bove Lodge & Hutz, LLP

20090071814 - Method for concentrating heavy nitrogen isotope: The object of the present invention is to provide a method for concentrating effectively the heavy nitrogen isotope 15N to 50 atom % or more. In order to achieve the object, the present invention provides a method for concentrating a heavy nitrogen isotope 15N, in which 14N15N and/or 15N2, which... Agent: Nixon & Vanderhye, PC

20090065346 - Process for the distillative separation of mixtures comprising monoethylene glycol and diethylentriamine: Processes comprising: providing a mixture comprising monoethylene glycol and diethylenetriamine; and subjecting the mixture to extractive distillation with a diethylenetriamine-selective solvent comprising triethylene glycol to provide a first stream comprising monoethylene glycol and a second stream comprising diethylenetriamine; wherein the first stream is substantially free of diethylenetriamine, and wherein the... Agent: Connolly Bove Lodge & Hutz, LLP

20090065347 - Process for the purification of aromatic amines: Aromatic amines which have been obtained by reduction of aromatic nitro compounds are purified by mixing the crude amine obtained after phase separation with an aqueous, alkali metal hydroxide solution and subsequent distillation of this mixture over a distillation column. The distillation column has at least an upper and a... Agent: Bayer Material Science LLC

20090057128 - Liquid separation by membrane assisted vapor stripping process: An improved process for separation of liquid mixtures involves vapor stripping followed by mechanical compression of the vapor which is then exposed to a permeation membrane for separation of the compressed vapor.... Agent: Glenna Hendricks

20090057129 - Method for producing trichlorosilane and method for producing polycrystalline silicon: A hydrogenation reaction vessel makes STC-containing substance react with hydrogen to convert the substance into TCS. A low boils removal column separates a chlorosilane distillate discharged from a hydrogenation reaction vessel into TCS and a mixture distillate containing hyper-hydrogenated chlorosilane, and circulates the mixture distillate containing hyper-hydrogenated chlorosilane to the... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.