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7598406 |
Production of ethylene oxide
Process for the recovery of ethylene oxide (EO) from fat absorbent (FA) which comprises providing a feed of elevated temperature FA to an EO Stripper, providing a stripping gas feed and contacting...
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7084284 |
Separation process
Phosphine and/or phosphine oxide promoters are effectively separated from propylene oxide reaction solvents through use of a membrane effective to retain the phosphine and/or phosphine oxide.
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7067680 |
Process for preparing organic hydroperoxide having a reduced amount of contaminants
A process for preparing organic hydroperoxide having a reduced content of contaminants, which process involves:
(a) oxidation of an organic compound to obtain reaction product containing an...
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6962967 |
Method of purifying polyether polyols of non-volatile impurities
The subject invention provides polyurethane foam and a method of purifying polyether polyols of non-volatile impurities for use in forming the polyurethane foam. The method includes the step of...
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6909022 |
Process of removing organic halogen-containing compounds
The present invention relates to a process of removing organic halogen-containing compounds from a liquid stream mainly containing one or more of the compounds selected from the group consisting of...
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6906209 |
Purification of propylene oxide
A process for purifying propylene oxide containing an unacceptable quantity of a poly (propylene oxide) polymer contaminant having a number average molecular weight of at least 50,000 and...
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6870060 |
Product recovery from supercritical mixtures
Oxidation products are recovered from a mixture of the products in a dense phase or supercritical solvent by a liquid—liquid extraction at dense phase conditions.
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6756453 |
Alicylic epoxy compounds and their preparation process, alicylic epoxy resin composition, and encapsulant for light-emitting diode
The present invention relates to alicyclic epoxy compounds obtained by selectively hydrogenating aromatic rings of aromatic epoxy compounds in the presence of a hydrogenation catalyst, the...
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6749668 |
Process for the recovery of combustible components of a gas stream
A process for the recovery of combustible components of a gas stream containing the combustible components and oxygen by selective absorption of the combustible components in a solvent, whereby...
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6727389 |
Cyclic organo-oxide storage vent scrubbing
A method for processing at least one cyclic organo-oxide using a closed loop scrubber/holding tank system that contains at least one amine, and circulating the amine through the closed loop while...
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6677468 |
Methods of reducing chloride content in epoxy compounds
In accordance with the present invention, methods have been developed for the reduction of the chloride content of epoxy compound starting materials. Invention methods comprise fractionating an...
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6641784 |
Optically active isocyanurate and optical resolver comprising derivative of the same
An optical resolver comprising an optically active substance made of tris-(2,3-epoxypropyl)isocyanurate, is presented. The optical resolver comprises an optically active...
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6548620 |
Epoxy resin composition and process for producing the same
The present invention provides a tetramethylbiphenyl type high performance epoxy resin composition and a curable epoxy resin composition containing the epoxy resin, useful in electrical and...
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6528665 |
Preventing undesired odor in and/or purifying alkanediols
Epoxyalkanes are subjected to at least one of the following washing operations: (1) washing with aqueous inorganic base, and then with aqueous borohydride, or vice versa; or (2) washing with an...
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6462209 |
Process for the purification of propylene oxide
Process for improving the quality of a propylene oxide contaminated with poly(propylene oxide), which process comprises the steps of: (a) contacting the liquid propylene oxide with an adsorbent...
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6451879 |
Phenolic resin, epoxy resin, and processes for producing these
A process for producing a phenolic resin of good hue, characterized by reacting a hydroxylated aromatic compound with an unsaturated cyclic hydrocarbon compound in the presence of both active...
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6407150 |
Processes for producing phenolic resin and epoxy resin
A process for producing phenol resin having good color tone, which process comprises reacting hydroxyl group-containing aromatic compound and unsaturated cyclic hydrocarbon under the condition that...
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6278003 |
Process for refining epoxy compounds, and heat-stable epoxy compounds prepared thereby
A process for refining epoxy compounds, wherein the process comprises: (a) providing a washed and dried organic phase comprising at least one epoxide compound; (b) contacting the organic phase with...
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5576362 |
Insulating material and a circuit substrate in use thereof
An insulating material characterized by that said insulating material is made by curing a mixture composed of a bisphenol A type epoxy resin having purity which is equal to or more than 90% and an...
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5559255 |
Method of recovering ethylene oxide
The present invention relates to a method of recovering ethylene oxide comprising the steps of: bringing a mixed gas containing ethylene oxide into contact with an absorbent so as to cause the...
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5547758 |
Insulating material
An insulating material characterized by that said insulating material is made by curing a mixture composed of a bisphenol A type epoxy resin having purity which is equal to or more than 90% and an...
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5514818 |
Resolution of stereoisomers of aliphatic epoxides
A method of resolving a mixture of stereoisomers of an aliphatic epoxide containing two or less oxygen atoms is provided. The method comprises utilizing a polysaccharide or a derivative thereof as...
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5493035 |
Propylene oxide purification
Activated carbon to be used in the removal of impurities from propylene oxide is first pre-wetted with a glycol such as propylene glycol; after bed deactivation, water containing a basic catalyst...
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5489366 |
Recovery of purified and substantially anhydrous propylene oxide
A distillation method for the purification of crude propylene oxide containing contaminating quantities of water and methanol by partially purifying the crude propylene oxide in a plural stage...
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5440058 |
Method for separating compounds in process streams
A method, especially applicable on a continuous basis to commercial process streams, for treating unwanted by-products and/or impurities contained in those streams. The method comprises the...
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5405977 |
Process for removing organic halides from alkylene carbonates
A method for removing organic halide contaminants from alkylene carbonates is disclosed. Organic halide contaminants are removed from alkylene carbonates by contacting the contaminated alkylene...
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5352807 |
Propylene oxide purification
The method for the separating close-boiling impurities from propylene oxide essentially free of high molecular weight poly (propylene oxide) which comprises contacting the impure propylene oxide...
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5296618 |
Method for the manufacture of the derivatives of propionic acid
A method is provided for supplying the desired optical isomer of a derivative of epoxypropionic acid from a racemix mixture. A representative derivative of epoxypropionic acid is an ester of...
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5235075 |
Purification of propylene oxide
A process for purifying propylene oxide containing an unacceptable quantity of poly(propylene oxide) contaminant having a molecular weight of at least about 50,000, which comprises contacting the...
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5187287 |
Lower alkylene oxide purification
The method for the separating close-boiling impurities from C 2 -C 4 l alkylene oxide which comprises contacting the impure alkylene oxide with solid activated carbon adsorbent and separating...
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5106458 |
Method for the purification of propylene oxide
Methyl formate is removed from impure propylene oxide by contacting the impure propylene oxide in a treating zone with a basic ion exchange resin for a period of time sufficient to convert the...
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5000825 |
Monoepoxide purification
A method is provided for the separation by extractive distillation of oxygenated impurities from a monoepoxide while avoiding epoxide loss, wherein lower glycol is used as extractive solvent in...
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4983260 |
Process for concentrating aqueous ethylene oxide solutions
A process for the concentration of ethylene oxide in an impure solution thereof including adding the solution and steam to a distillation column, recovering the gaseous stream therefrom containing...
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4935101 |
Process for the recovery of a water-insoluble epoxy alcohol
Water-insoluble crystallizable epoxy alcohols such as phenyl glycidol are recovered from epoxidation reaction mixtures by washing the mixture with water, concentrating the mixture by distillation...
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4831196 |
Process for olefin oxide detoxification
A high efficiency process for removal and detoxification of olefin oxides from gas compositions is described. The process consists of olefin oxide absorption at ambient pressure in an absorber...
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4772732 |
Method for purification of butylene oxide
The invention discloses a method for purifying butylene oxide by using an anion exchange resin and an adsorbent. The anion exchange resin removes acid and aldehyde impurities while the adsorbent...
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4735959 |
Carboxylic acid amides and pharmaceutical compositions containing them
There are described novel carboxylic acid derivatives of the formula ##STR1## and derivatives of the formula ##STR2## and the addition salts thereof, which exhibit an effect on the intermediary...
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4692535 |
Purification of propylene oxide
Process for improving the quality of propylene oxide contaminated with minute quantities of high molecular weight poly(propylene oxide) by contacting liquid propylene oxide with certain solid...
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4691035 |
Purification of propylene oxide by treatment with a selected base and inert salt
Methyl formate is removed from propylene oxide by treatment with a selected base such as sodium hydroxide in water and glycerol. Selected inert salts may be added. The rate of methyl formate...
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4691034 |
Purification of propylene oxide by treatment with calcium hydroxide in glycerol or sugar water
Methyl formate is removed from propylene oxide by treatment with aqueous calcium hydroxide slurry. Calcium hydroxide solubility is increased by adding a solubilizer selected from the group...
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4668807 |
Process for reducing the content of hydrolyzable chlorine in glycidyl compounds
To reduce the content of hydrolyzable chlorine in glycidyl compounds, these are dissolved in a halogen-free organic solvent and treated with an equivalent excess of aqueous alkali metal hydroxide...
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4617357 |
Process for reducing the content of chlorine in glycidyl compounds
To reduce the content of chlorine in glycidyl compounds, in which the glycidyl groups are bonded to ether-oxygen, N or S atoms, these compounds are dissolved in a halogen-free inert organic solvent...
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4535150 |
Process for preparing epoxy resins having low hydrolyzable chlorine contents
Low hydrolyzable chlorine containing epoxy resins are obtained by conducting a second dehydrohalogenation of the resin in isopropanol or secondary butanol solvent using aqueous alkali metal...
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4511710 |
Halide removal from fluid organic materials
Unwanted halogen values are removed from liquid resin, organic or hydrocarbon material by adding particulate crystalline lithium aluminate compounds to the liquid material to act as a halogen...
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4423239 |
Method for purifying an epoxidation product
In a method for purifying a crude epoxidation product of a liquid conjugated diolefin polymer or a vegetable oil which comprises the steps of adding an aqueous washing agent to a crude epoxidation...
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RE30818 |
Epichlorohydrin purification process
2,3-Butanedione impurity is removed from epichlorohydrin by contacting the impurity containing epichlorohydrin with a macroreticular poly(t-butyl acrylate) resin an acrylic ester resin having...
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4243492 |
Process for purifying crude olefin oxides
A crude olefin oxide containing high-boiling ingredients is distilled at a pH of 4 to 7 in the presence of a nonvolatile neutral or weakly basic alkali metal or alkaline earth metal salt or...
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4233202 |
Process for the purification of epoxy compounds
The low molecular water-soluble onium-catalyst dissolved in the liquid mixture of epoxy resin and excess epihalohydrin obtained by the reaction in the presence of base of a compound having --OH,...
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4215058 |
Process of epoxidation of oils
Epoxidation of oil, such as soybean oil, using a peracid, is performed in the presence of a complexing agent for heavy metals selected from nitriloacetic, cyclohexane aminotetracetic and...
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4127594 |
Selective hydrogenation of olefinic impurities in epichlorohydrin
Beta-chloroacrolein and 5,6-epoxyhexene-1 impurities present in minor amounts in epichlorohydrin are selectively removed with minimal concomitant destruction of epichlorohydrin by hydrogenation in...
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