Air Products and Chemicals, Inc.

Ingrid Kristine Meier

Kevin Rodney Lassila

Caroline Sassano Slone

Ronald Martin Pearlstein

Guido Peter Pez

Dorai Ramprasad

Michael Langsam

Mark L Listemann

Michael E Ford

Michael Louie

Richard Joseph Goddard

Michael John Kimock

Michael Edward Ford

Certain substituted amines, alkylenediamines or polyamines, and derivatives of these, are suitable for use in preventing, inhibiting, or otherwise modifying crystalline gas hydrate formation. These inhibitors include compounds from any of the following groups.  The substituents R-Rmay be hydrocarbyl groups or, in some cases, polyhydroxyalkyl groups or (CH)&#x2014;COOin which p is either 1 or 2.

Amine-based gas hydrate inhibitors

Low foam n-alkyltartarimide and n-alkylmalimide wetting agents

Low foam N,N&prime;-dialkylmalamide wetting agents

Citric acid tri-alkylamide surfactants

Low foam N,N&prime;-dialkyltartaramide wetting agents

This invention provides water-based compositions which are essentially free of hydrocarbon solvents, particularly coating, ink, fountain solution, adhesive, agricultural and electronics cleaning compositions, manifesting reduced equilibrium and dynamic surface tension by the incorporation of a surface tension reducing amount of certain tri-alkylamides of citric acid of the structure

A method for making flexible polyurethane foam in which a polyisocyanate is reacted with a polyol in the presence of a urethane catalyst, a blowing agent, optionally a silicone surfactant cell stabilizer, and a cell opening additive. The cell opening additive comprises an active methylene or methine compound which also contains a tertiary amine. Preferred cell opening additives are 2-cyano-N-&lsqb;3-(dimethylamino)-propyl&rsqb;acetamide and (NC)CH,C(O)OCH,CH,N(CH,)CH,CH,OCH,CH,N(CH,),.

Tertiary amine-containing active methylene compounds for improving the dimensional stability of polyurethane foam

A method for preparing a flexible polyurethane foam by reacting an organic polyisocyanate with a polyol in the presence of urethane catalyst, water as a blowing agent, optionally a silicone surfactant, and a cell opener characterized in that the cell opener comprises an active methylene- or methine-group containing compound.

Weak bronsted acid derivatives for improving dimensional stability of

An improved method of preparing polyurethane foam by reacting an organic polyisocyanate with a polyol in the presence of water and a combination of a gelling catalyst and a blowing catalyst, in which the blowing catalyst is a compound represented by the following formulae:

Group IVB metal blowing catalyst compositions for the production of

High capacity solid state compositions comprising cyanocobaltate complexes have been developed which are capable of reversibly chemically binding oxygen to selectively remove oxygen from an oxygen-containing fluid stream. The cyanocobaltate complexes which make up the compositions comprise a cobalt (II)-containing anion having from 3 to 5 cyanide ligands wherein at least one cyanide stretching mode, as measured by infrared spectroscopy, is between 2074 cm.sup.-1 and 2140 cm.sup.-1. Additionally, these complexes have a charge-balancing cation having a molecular volume in excess of 40.ANG..sup.3.

Process for reversibly binding oxygen

High Capacity solid state cyanocobaltate complexes represented by the chemical formula:

Reversible oxygen sorbent compositions

A process is provided for selectively separating oxygen from an oxygen-containing fluid stream by bringing said fluid stream into contact with a high capacity solid state cyanocobaltate complex in a non-aluminosilicate environment represented by the chemical formula:

Process using cyanocobaltate complexes for removing oxygen from a stream

Cyanocobaltate oxygen adducts

The present invention is a class of semi-permeable polyimide membranes and a process for using such membranes to separate one or more components of a gaseous mixture. The membranes are prepared from a polyimide having surface-modifiable functionalities comprising repeating units formed from an aromatic dianhydride and a bridged alkylated bisaniline wherein the bridging group of the diamine possesses restricted, rotatable rigid or low Van Der Waal energy substituents which are orthogonal to the polymer backbone. The membranes formed therefrom are contacted in the presence of an oxygen source with an activating force such as high energy electromagnetic irradiation to effect modification of the polymer surface. The surface-modified polyimide membranes exhibit high gas perm-selectivities and are especially useful in effecting the separation of oxygen and nitrogen from air.

Gas separating membranes from polyimide polymers and a process for using

The present invention is a class of semi-permeable polyimide membranes and a process for using such membranes to separate one or more components of a gaseous mixture. The membranes are prepared from a polyimide having surface-modifiable functionalities comprising repeating units formed from an aromatic dianhydride and an alkyl-substituted phenylenediamine having at least one hydrogen atom located on a ring position ortho to an amine nitrogen. The membranes formed therefrom are contacted in the presence of an oxygen source with an activating force such as high energy electromagnetic irradiation to effect modification of the polymer surface. The surface-modified polyimide membranes exhibit high gas perm-selectivities and are especially useful in effecting the separation of oxygen and nitrogen from air.

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Asbury, NJ, United States of America

Ingrid Kristine Meier