Dow Global Technolgoies LLC

Dow Silicones Corporation

Dow Technology Investments LLC

Christophe R Laroche

John R Dowdle

Gerardo Padilla

Linda L Pirtle

Diego Ortiz Vega

Stephen W King

James M Hill

Eric J Klinker

Timothy D Halnon

Daniel A Aguilar

Edward D Daugs

Lauren Marie Tonge

John G Pendergast, Jr

Angela I Padilla-Acevedo

Brian A Jazdzewski

Sara B Klamo

Ravindra S Dixit

Brian Jeffery Swanton

Jonathan W Leister

Ross E Dugas

Zubin B Kuvadia

Mark W Brown, Ii

Bhawesh Kumar

Ashwin R Bharadwaj

Armin Hassanzadeh

Amanda M Goodman

John G Pendergast

Ni Yan

Jianping Zeng

Barry Archer

Gagan Srivastava

Mark Brown Ii

The present invention relates to a dehydration composition and method of use thereof for drying gas streams, in particular natural gas streams, wherein the dehydration composition comprises a (a) glycol and (b) an additive selected so as to increase the viscosity, surface tension, and/or specific gravity of the dehydration composition. Said dehydration composition and method results in the reduction of solvent loss during the dehydration step in a gas dehydration unit.

Gas dehydration composition and process to reduce solvent losses

A bonded multilayer article including: (a) at least one first layer of a silicone-containing rubber substrate material bonded to (b) at least one second layer of a substrate material bondable to the first layer; wherein at least a portion of the surface of the first layer is activated for adhesion to increase the bond strength of the first layer to a second layer such that the bond strength of the first layer bonded to the second layer is increased; and a process for producing the above bonded multilayer article.

Bonded multilayer article

Embodiments relate to a continuous process for the production of hydroxyethylpiperazine that includes feeding neat piperazine, recycled piperazine, and ethylene oxide to a reactor to form crude hydroxyethylpiperazine, in which the reactor is a continuous stirred tank reactor or a plug flow reactor. The process further includes continuously feeding the crude hydroxyethylpiperazine from the reactor to a distillation system that includes at least one distillation column, the distillation system produces at least a recycled piperazine stream and a hydroxyethylpiperazine stream, the recycled piperazine stream includes the recycled piperazine that is fed to the reactor to form the crude hydroxyethylpiperazine, and the hydroxyethylpiperazine stream includes at least 60 wt % of hydroxyethylpiperazine based on a total weight of the hydroxyethylpiperazine stream.

Production of hydroxyethylpiperazine

Disclosed is a process for regenerating a hybrid solvent used to remove contaminants from a fluid stream and to provide an improved yield of purified fluid. Said process comprises at least one purification unit () and at least one regeneration unit () wherein condensed waterfrom the regeneration unit is recycled back into the purification unit and none of the condensed water is reintroduced into the regeneration unit.

Process for reducing energy consumption in the regeneration of hybrid solvents

Disclosed is a process for regenerating a hybrid solvent used to remove contaminants from a fluid stream and to provide an improved yield of purified fluid. Said process comprises a purification unit () and at least one regeneration unit () wherein make-up water () is added to the regenerated lean hybrid solvent () prior to reuse in the first purification unit and no water is recycled into the regeneration unit.

Energy efficient process for separating hydrogen sulfide from gaseous mixtures using a hybrid solvent mixture

The present invention relates to a dehydration composition and method of use thereof for drying gas streams, in particular natural gas streams, wherein the dehydration composition comprises (i) a glycol, (ii) an imidazole compound, and optionally (iii) one or more of an alkali metal carboxylate, an additional glycol different than (i), an alkanolamine, a phosphate acid, a salt of a phosphate acid, a borate acid, a salt of a borate acid, a sweetening agent, a low temperature viscosity improver, a corrosion inhibitor, an antifoaming agent, or mixtures thereof.

Composition and process for the dehydration of gases

Disclosed is a process for regenerating a hybrid solvent used to remove contaminants from a fluid stream and to provide an improved yield of purified fluid. Said process comprises at least two purification units and at least one regeneration unit wherein regenerated lean hybrid solvent and condensed water from the regeneration unit is used to reclaim additional purified fluid in the second purification unit.

Process for selective removal of acid gases from fluid streams using a hybrid solvent mixture

Disclosed is a process for regenerating a hybrid solvent used to remove contaminants from a fluid stream and to provide an improved yield of purified fluid. Said process comprises at least one purification unit () and at least one regeneration unit () wherein condensed water () from the regeneration unit is combined with the regenerated lean hybrid solvent () prior to reuse in the purification unit and none of the condensed water is recycled into the regeneration unit.

Process for separating hydrogen sulfide from gaseous mixtures using a hybrid solvent mixture

The present invention relates to a dehydration composition and method of use thereof for drying gas streams, in particular natural gas streams, wherein the dehydration composition comprises (i) a glycol, (ii) a borate compound, (iii) an alkali metal carboxylate, and (iv) an additional glycol different than (i), and/or (v) an additional additive selected from an alkanolamine, a phosphate acid or salt compound, a sweetening agent, a low temperature viscosity improver, a corrosion inhibitor, an antifoaming agent, or mixtures thereof.

Composition and process for gas dehydration

The present invention relates to an improved process for making hydroxyethyl piperazine compounds especially mono-hydroxyethyl piperazine. The improvement comprises reacting piperazine and an alkylene oxide, preferably ethylene oxide in a reactive distillation column.

Process for making hydroxyethyl piperazine compounds

A method of treating oil and gas streams comprising HS and a carbon oxide, the method including the step of treating the oil and gas stream with an amine solution having an alkanolamine and a quaternary ammonium salt, wherein the amine solution selectively removes the HS over the carbon oxide.

Gas sweetening solvents containing quaternary ammonium salts

The present invention relates to an aqueous alkanolamine solution and use therein a process for the selective removal of hydrogen sulfide from gaseous mixtures comprising hydrogen sulfide. The aqueous alkanolamine solution consists of &#x2014;an amino compound with the formula: RRNCHCH(OH)CHOH wherein Rand Rindependently represent methyl, ethyl, propyl or isopropyl groups &#x2014;and bis(2-hydroxyethyl)methylamine, &#x2014;optionally one or more of a physical solvent, an antifoaming agent, an antioxidant, a corrosion inhibitor, a film former, a chelating agent or a pH adjuster and &#x2014;water The process for selectively removing hydrogen sulfide, comprising the step of contacting the gaseous mixture with the aqueous alkanolamine solution, preferably wherein the temperature of the aqueous alkanolamine solution is equal to or greater than 140&#xb0; F.

Aqueous alkanolamine composition and process for the selective removal of hydrogen sulfide from gaseous mixtures

A method of treating oil and gas streams to remove total organic sulfur or total acid gas including the step of treating the gas stream with a solution of an amine, physical solvent, and water wherein the amine solution may optionally also contain an activator.

Hybrid solvent formulations for total organic sulfur removal and total acidic gas removal

The present invention relates to an aqueous alkanolamine solution demonstrating low volatility comprising 2-di-methylamino-2-hydroxymethyl-1, 3-propanediol useful for removing acid gases from gaseous mixtures. Said aqueous alkanolamine solution may further comprise one or more of an acid or acid-forming compound, another amino compound, an activator, a physical solvent, or one or more other compounds used in gal-liquid treatment practices. Further, the present invention relates to a process for removing acid gases from a gaseous mixture, preferably hydrogen sulfide, comprising the step of contacting the gaseous mixture with said aqueous alkanolamine solution. Examples of the gaseous mixtures include natural gas, synthesis gas, tail gas, and refinery gas.

Process for the removal of acid gases from gaseous mixtures using an aqueous solution of 2-dimethylamino-2-hydroxymethyl-1, 3-propanediol

A method of treating oil and gas streams including hydrogen sulfide (HS) comprising treating the gas stream with an aqueous solution of an amine and a physical solvent which, when mixed in equal mass ratio with the amine or amine mixture, display a dielectric constant of at least about 20, wherein the pKa of the amine is at least about 9.0 and the amine boiling point is at least 200&#xb0; C.

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Lake Jackson, TX, United States of America

Christophe R Laroche