| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 549520000 | By dehydrohalogenation of a halohydrin or by reacting a hypohalite or hypohalous acid with an ethylenically unsaturated compound at the site of unsaturation | 21 |
| 20100029958 | PROCESS FOR PRODUCING EPOXIDES - A process for producing epoxides, the process including: (a) feeding at least one aqueous alkali and at least one halohydrin to a reactive distillation column; (b) concurrently in the reactive distillation column: (i) reacting at least a portion of the halohydrin with the alkali to form an epoxide; and (ii) stripping water and the epoxide from a basic aqueous residue; (c) recovering the water and the epoxide from the reactive distillation column as an overheads fraction; and, (d) condensing and phase separating the overheads fraction at a temperature of 50° C. or less to form an organic overheads fraction including the epoxide and an aqueous overheads fraction including water. | 02-04-2010 |
| 20130012730 | HIGH-PURITY EPOXY COMPOUND AND METHOD OF PRODUCING THEREOF - An epoxy compound of high-purity N,N,N′,N′-tetraglycidyl-3,4′-diaminodiphenyl ether is produced by: an addition reaction step of reacting 3,4′-diaminodiphenyl ether with epichloro-hydrin in a polar protic solvent at 65 to 100° C. for | 01-10-2013 |
| 20130217901 | PROCESS FOR PRODUCING OPTICALLY ACTIVE 4-CHLORO-3-HYDROXYBUTANAL COMPOUND - The invention relates to a method of producing optically active 4-chloro-3-hydroxybutanal compound (2) by reacting chloroacetaldehyde with aldehyde compound (1) in the presence of optically active pyrrolidine compound (5). | 08-22-2013 |
| 20140155638 | METHOD OF SYNTHESIS OF SUBSTITUTED HEXITOLS SUCH AS DIANHYDROGALACTITOL - The present invention provides an efficient method of synthesizing and purifying dianhydrohexitols such as dianhydrogalactitol. In general, as applied to dianhydrogalactitol, the method comprises: (1) reacting dulcitol with a concentrated solution of hydrobromic acid at a temperature of about 80° C. to produce dibromogalactitol; (2) reacting the dibromogalactitol with potassium carbonate in t-butanol to produce dianhydrogalactitol; and (3) purifying the dianhydrogalactitol using a slurry of ethyl ether to produce purified dianhydrogalactitol. Another method produces dianhydrogalactitol from dulcitol; this method comprises: (1) reacting dulcitol with a reactant to convert the 1,6-hydroxy groups of dulcitol to an effective leaving group to generate an intermediate; and (2) reacting the intermediate with an inorganic weak base to produce dianhydrogalactitol through an intramolecular S | 06-05-2014 |
| 20140364635 | PREPARATION METHOD OF GLYCIDYL TERTIARY CARBONIC ESTER - The present disclosure provides a preparation method of glycidylester of tertiary carbonic acid. The synthesis is performed in two steps: first, the tertiary carbonic acid reacts with a halo substituted epoxide under a catalyst to produce tertiary carbonic halo substituted alcohol ester; after dehydrohalogenation of the halo substituted alcohol ester of tertiary carbonic acid, the glycidylester of tertiary carbonic acid is formed. In the first step of preparing the halo substituted alcohol ester of tertiary carbonic acid through synthesis, the reaction between the tertiary carbonic acid and the halo substituted epoxide is only performed in the existence of water and the catalyst, and the water comprises water added before the reaction. The present disclosure significantly increases the product output in the unit volume, and is particularly suitable for industrial production of glycidylester of tertiary carbonic acid having the low cost, high purity, low color and stable color. | 12-11-2014 |
| 20140371475 | METHOD FOR PRODUCING SULFUR-CONTAINING EPOXY COMPOUND - An object of the present invention is to provide a method for producing a sulfur-containing epoxy compound producing no scum-like insoluble matter. According to the present invention, a sulfur-containing halohydrin compound is dripped into and reacted with a mixed solvent containing an organic solvent and a basic compound to provide the method for producing the sulfur-containing epoxy compound. According to aspects of the present invention, the organic solvent is at least one type of compound selected from toluene and benzene, the basic compound is at least one type of compound selected from sodium hydroxide, potassium hydroxide and calcium hydroxide, and the reaction temperature is between −5° C. and 30° C. | 12-18-2014 |
| 20160122310 | PROCESS FOR THE MANUFACTURE OF EPOXY-MONOMERS AND EPOXIDES - A process for manufacturing epoxy monomers and/or epoxides in high yields and useful quality and chemical stability by dehydrochlorination of the corresponding chlorohydrins with an alkaline agent, producing the corresponding side product dry salt in a high purity, characterized in that the process comprises the following steps: a. Reaction of the chlorohydrins with the alkaline agent to form corresponding epoxides and the corresponding precipitated chloride salt; b. Dehydration, and optionally completing the reaction, of the reaction mixture of step (a), by use of an azeotropic agent, added to step (b) or generated in situ in step (a), resulting in the producing of a dehydrated reaction mixture; c. Separating the resulting chloride salt by filtration from the dehydrated reaction mixture (b) and d. Isolating the epoxide from the filtered liquid fraction. | 05-05-2016 |
| 549521000 | Oxirane ring and chalcogen, cyano, nitrogen, or halogen are bonded directly to the same carbon (e.g., glycidyl ester formed, etc.) | 10 |
| 20080207930 | Process For Producing a Chlorhydrin From a Multihydroxylated Aliphatic Hydrocarbon and/or Ester Thereof in the presence of Metal Salts - Process for producing a chlorohydrin by reaction between a multihydroxylated-aliphatic hydrocarbon, an ester of a multihydroxylated-aliphatic hydrocarbon, or a mixture thereof, and a chlorinating agent, according to which the multihydroxylated-aliphatic hydrocarbon, the ester of a multihydroxylated-aliphatic hydrocarbon, or the mixture thereof used contains at least one solid or dissolved metal salt, the process comprising a separation operation to remove at least part of the metal salt. | 08-28-2008 |
| 20100029959 | PROCESS FOR PRODUCING EPOXIDES - A process for producing epoxides, the process including: (a) feeding at least one aqueous alkali and at least one halohydrin to a reactive distillation column, wherein the reactive distillation column includes a feed zone, a top zone disposed above the feed zone, and a bottom zone disposed below the feed zone; (b) concurrently in the reactive distillation column: (i) reacting at least a portion of the halohydrin with the alkali to form an epoxide; and (ii) stripping water and the epoxide from a basic aqueous residue; (c) recovering the water and the epoxide from the reactive distillation column as an overheads fraction; (d) condensing and phase separating the overheads fraction to form an organic overheads fraction including the epoxide and an aqueous overheads fraction including water; and (e) maintaining a liquid holdup per plate in the feed zone at a residence time of 10 seconds or less. | 02-04-2010 |
| 20100331555 | PROCESS AND APPARATUS FOR PRODUCING AND PURIFYING EPICHLOROHYDRINS - A process and apparatus are disclosed for the purification of epichlorohydrin. The process includes distilling and/or fractionating a feed stream containing epichlorohydrin, dichlorohydrin(s), and one or more other substances, subjecting at least a portion of the liquid phase effluent to a dichlorohydrin dehydrochlorination process for converting residual dichlorohydrin(s) in the liquid phase effluent to epichlorohydrin, and recovering purified epichlorohydrin from the vapor phase effluent in which the distillation/fractionation pressure and/or temperature of step (1) is adjusted to retain at least 5 weight-percent epichlorohydrin in the liquid phase effluent. The apparatus for making purified epichlorohydrin includes a dehydrochlorination apparatus, a first liquid-vapor contacting apparatus, and a second liquid-vapor contacting apparatus connected to the dehydrochlorination apparatus for recycling a distillate to the dehydrochlorination apparatus. Advantages include more efficient recovery of epichlorohydrins and reduced capital investment in recovery equipment. | 12-30-2010 |
| 20110124892 | BATCH, SEMI-CONTINUOUS OR CONTINUOUS HYDROCHLORINATIONOF GLYCERIN WITH REDUCED VOLATILE CHLORINATED HYDROCARBON BY-PRODUCTS AND CHLOROACETONE LEVELS - The present invention relates to a process for converting a multihydroxylated-aliphatic hydrocarbon or ester thereof to a chlorohydrin, by contacting the multihydroxylated-aliphatic hydrocarbon or ester thereof starting material with a source of hydrogen chloride at superatmospheric, atmospheric and subatmospheric pressure conditions for a sufficient time and at a sufficient temperature, preferably wherein such contracting step is carried out without substantial removal of water, to produce the desired chlorohydrin product; wherein the desired product or products can be made in high yield without substantial formation of undesired overchlorinated byproducts; said process carried out without a step undertaken to specifically remove volatile chlorinated hydrocarbon by-products or chloroacetone, wherein the combined concentration of volatile chlorinated hydrocarbon by-products and chloroacetone is less than 2000 ppm throughout any stage of the said process. | 05-26-2011 |
| 20110166369 | Process for purifying hydrogen chloride - Process for purifying hydrogen chloride, comprising at least one step of bringing said hydrogen chloride into contact with a scrubbing agent containing at least one chlorohydrin. | 07-07-2011 |
| 20110178315 | PROCESS FOR THE CONVERSION OF A CRUDE GLYCEROL, CRUDE MIXTURES OF NATURALLY DERIVED MULTICOMPONENT ALIPHATIC HYDROCARBONS OR ESTERS THEREOF TO A CHLOROHYDRIN - A process for converting a crude glycerol, crude mixtures of naturally derived multihydroxylated-aliphatic hydrocarbons or esters thereof to a chlorohydrin, by contacting the crude glycerol, crude mixtures of naturally derived multihydroxylated-aliphatic hydrocarbons or esters thereof starting material with a source of a superatmospheric partial pressure of hydrogen chloride for a sufficient time and at a sufficient temperature, and wherein such contracting step is carried out without substantial removal of water, to produce the desired chlorohydrin product; wherein the desired product or products can be made in high yield without substantial formation of undesired overchlorinated byproducts; wherein said crude glycerol, said ester of crude glycerol, or mixture thereof is derived from a renewable raw material. Chlorohydrins made by the process of the present invention are useful in preparing epoxides such as epichlorohydrins. | 07-21-2011 |
| 20120004432 | PROCESS FOR THE CATALYTIC HALOGENATION OF A DIOL - The present invention relates to a process for the catalytic halogenation of an organic compound comprising at least one vicinal diol moiety, said process comprising a step of bringing the organic compound comprising at least one vicinal diol moiety into contact with a hydrogen halide in the presence of a catalyst, characterized in that the catalyst is an organic compound comprising a β-diketone moiety or a β-keto aldehyde moiety. | 01-05-2012 |
| 20130090485 | METHOD FOR PREPARING CHLOROHYDRINS AND METHOD FOR PREPARING EPICHLOROHYDRIN USING CHLOROHYDRINS PREPARED THEREBY - A method of preparing chlorohydrins and a method of preparing epichlorohydrin by using chlorohydrins prepared using the method are provided. The method of preparing chlorohydrins by reacting polyhydroxy aliphatic hydrocarbon with a chlorination agent in the presence of a catalyst includes at least one combination of a series of unit operations including a first reaction step, a water removal step, and a second reaction step, in that respective order, and after mixing at least a portion of a reaction mixture discharged from at least one reaction steps from among the plurality of reaction steps with an additional chlorination agent, recirculating the resulting mixture to the reaction step from which the reaction mixture was discharged. The method of preparing epichlorohydrin includes a step of reacting chlorohydrins prepared using the method of preparing chlorohydrins, with an alkaline agent. | 04-11-2013 |
| 20130211111 | METHOD OF SYNTHESIS OF SUBSTISTUTED HEXITOLS SUCH AS DIANHYDROGALACTITOL - The present invention provides an efficient method of synthesizing and purifying dianhydrohexitols such as dianhydrogalactitol. In general, as applied to dianhydrogalactitol, the method comprises: (1) reacting dulcitol with a concentrated solution of hydrobromic acid at a temperature of about 80° C. to produce dibromogalactitol; (2) reacting the dibromogalactitol with potassium carbonate in t-butanol to produce dianhydrogalactitol; and (3) purifying the dianhydrogalactitol using a slurry of ethyl ether to produce purified dianhydrogalactitol. | 08-15-2013 |
| 20130281721 | PROCESS AND APPARATUS FOR PURIFICATION OF INDUSTRIAL BRINE - Processes and apparatus for purifying brine are provided including (1) providing an aqueous brine solution comprising one or more inorganic salts and one or more organic compounds and (2) conducting at least one unit operation for removing organic compounds from the brine solution to obtain a purified brine solution. | 10-24-2013 |
| 549522000 | Oxirane ring is unsubstituted or hydrocarbyl substituted only | 4 |
| 20100029960 | PROCESS FOR PRODUCING EPOXIDES - A process for producing epoxide, the process including contacting an organic phase including at least one halohydrin(s) with at least one aqueous phase including a base in a plug-flow mixer/reactor system to disperse the organic phase in the aqueous phase via a mixing device imparting a power-to-mass ratio of at least 0.2 W/kg to convert at least a portion of the at least one halohydrin to an epoxide. | 02-04-2010 |
| 20110054196 | CATALYST FOR PRODUCTION OF ETHYLENE OXIDE, AND METHOD FOR PRODUCTION OF ETHYLENE OXIDE USING THE CATALYST | 03-03-2011 |
| 20120209015 | PROCESS FOR PREPARING DIVINYLARENE DIOXIDES - A process for preparing a divinylarene dioxide including reacting (a) at least one divinylarene with (b) at least one oxidant in the presence of (c) at least one transition metal complex catalyst, and (d) optionally, in the presence of a solvent, and (e) optionally in the presence of a catalyst modifier under conditions to form a divinylarene dioxide product. | 08-16-2012 |
| 20130123521 | PROCESS FOR PREPARING DIVINYLARENE DIOXIDES - A process for preparing a divinylarene dioxide including (a) reacting at least one divinylarene with hypochlorous acid to form a chlorohydrin; and (b) treating the chlorohydrin formed in step (a) with at least one base, under conditions to form a divinylarene dioxide product. | 05-16-2013 |
