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A Cloaking System designed to operate in the visible light spectrum, utilizes optoelectronics and/or photonic components to conceal an object within it.

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Class 570/262 - Purification or recovery


Subclass of Class 570 - Organic compounds -- part of the class 532-570 series
Definition: Process wherein a halogen containing compound is separated
No. of patents: 154
Last issue date: 04/10/2012


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NumberTitleIssue Date
8153849Trityl chloride recovery
Methods of recovering a triarylmethyl halide from a sucrose derivatization process include the steps of (a) forming a mixture including 1) a triarylmethylated sucrose derivative including at least one t...
04/10/2012
8119846Separation and/or recovery of propyl bromide
Described is a process for separating an organic phase comprising mainly propyl bromide from a crude reaction mixture formed by free-radical catalyzed hydrobromination of propylene with hydrogen bromide. The process comprises (A) feeding cold water into an upper or ...
02/21/2012
7939698Method for grignard type reactions in microreactors
The present invention relates to a process for Grignard type reactions comprising mixing at least two fluids in a microreactor having at least two injection points. ...
05/10/2011
7405334Process for the reduction of acidic contaminates in fluorinated hydrocarbons
The present invention relates to processes for reducing the concentration of acidic impurities HF, HCl, HBr, HI, HNO3 and H2SO4 in fluorinated hydrocarbons. The process involves: (i) contacting the fluorinated hydrocarbon with a phos...
07/29/2008
7361794Zone reactor
In a method of converting alkanes to their corresponding alcohols and ethers a vessel comprises a hollow, unsegregated interior defined first, second, and third zones. In a first embodiment of the invention oxygen reacts with metal bromide in the first zone to provi...
04/22/2008
7291757Method and device for utilizing heat in the production of 1,2-dichloroethane
The invention relates to a method for the production of 1,2-dichloroethane by direct chlorination using chlorine and ethene in which, despite low reaction temperatures during direct chlorination, reaction heat produced is nevertheless used. According to the inventio...
11/06/2007
7252768Method for eliminating metal halides that are present in a liquid or gaseous, organic or non-organic effluent
The invention relates to a method for eliminating metal halides which are present in a liquid or gaseous, organic or non-organic effluent. According to the invention, the elimination is carried out by absorption of said metal halides on alumina agglomerates. The inv...
08/07/2007
7230150Zone reactor
In a method of converting alkanes to their corresponding alcohols, ethers, olefins, and other hydrocarbons, a vessel comprises a hollow, unsegregated interior defined first, second, and third zones. In a first embodiment of the invention oxygen reacts with metal hal...
06/12/2007
7182840Method and device for exploiting heat resulting from the production of 1,2-dichloroethane
The invention relates to a method and a device for the optimal use of reaction heat resulting from the production of 1,2-dichloroethane from ethene and chlorine. The aim of the invention is achieved by extracting reaction heat liberated during the reaction of chlori...
02/27/2007
7163606Process for recovering methylene chloride
A system for recovering methylene chloride from an aqueous waste stream is disclosed. The system includes a distillation unit, at least one heat transfer unit, receptacles for methylene chloride and waste product, a temperature probe and a controller configured to s...
01/16/2007
7161050Method and apparatus for synthesizing olefins, alcohols, ethers, and aldehydes
A reactant selected from the group consisting of alkanes, alkenes, alkynes, dienes, and aromatics is reacted with a halide selected from the group including chlorine, bromine, and iodine to form a first reaction product. The first reaction product is reacted with a ...
01/09/2007
7148390Integrated process for synthesizing alcohols, ethers, aldehydes, and olefins from alkanes
Alcohols, ethers, aldehydes, and olefins are manufactured from alkanes by mixing an alkane and a halogen selected from the group including chlorine, bromine, and iodine in a reactor to form alkyl halide and hydrogen halide. The alkyl halide only or the alkyl halide ...
12/12/2006
7132579Method of chlorine purification and process for producing 1,2-dichloroethane
A method for chlorine purification in which crude chlorine containing nitrogen and/or oxygen is purified to separate the nitrogen and oxygen from the chloride, characterized in that the crude chlorine containing nitrogen and/or oxygen is contacted with 1,2-dichloroe...
11/07/2006
7112709Method for reusing heavy end by-products in the manufacture of polychlorinated alkanes
A method for recovering much of the carbon and chlorine value in the heavy ends and other undesired by-products formed during the production of a C3 or higher polychlorinated alkane through the reaction of carbon tetrachloride with an olefine or chlorinat...
09/26/2006
7045668Production and use of hexafluoroethane
A process for production of high-purity hexafluoroethane, wherein a mixed gas containing hexafluoroethane and chlorotrifluoromethane is reacted with hydrogen fluoride in a gas phase in the presence of a fluorination catalyst at 200-450° C., for fluorination of the ...
05/16/2006
7019182Method of hydrocarbon preservation and environmental protection
Gas phase hydrocarbons resulting from the operation of offshore petroleum wells are converted into corresponding liquid products which are mixed with liquid phased hydrocarbons resulting from operation of the offshore petroleum well for delivery therewith. ...
03/28/2006
6987206Methods and materials for the preparation and purification of halogenated hydrocarbons
Methods and materials are provided for the production and purification of halogenated compounds and intermediates in the production of 1,1,1,3,3-pentafluoropropane. In a preferred embodiment, the process steps include: (1) reacting carbon tetrachloride with vinyl ch...
01/17/2006
6956143Process for dissolving salts in 1,2-dichloroethane using ultrasound and a device for carrying out said process
The invention relates to a process and a device for the dissolution of salt that is hardly soluble, especially sodium chloride and other poorly soluble salts in 1,2 dichloroethane, which primarily are to be used in direct chlorination plants for the production of 1,...
10/18/2005
6844474Process for the production of difluoromethane
The present invention provides a vapor phase process for the production of difluoromethane, HFC-32. The process of this invention provides for the preparation of HFC-32 by a process that exhibits both good product yield and selectivity. ...
01/18/2005
6787678Method of removing water from hydrofluorocarbon manufacturing processes
Disclosed are improved fluorination processes and fluorine-containing compositions which involve introducing to one or more fluorination process compositions a water reactive agent in an amount and under conditions effective to decrease the amount of water in that c...
09/07/2004
6646171Process for the crystallization of sterically hindered compounds
A process for the crystallisation of a sterically hindered organic compound from a saturated or supersaturated solution of said compound in a solvent therefor, characterised in that crystallisation is effected under elevated pressure at a temperature abov...
11/11/2003
6589444Process for separating water from chemical mixtures
The present invention relates to novel compositions of drying agents of superabsorbent polymers, molecular sieves and mixtures thereof and binders of polyurethane foam, polyisocyanurate foam and supports comprising cellulose and a method for separating, d...
07/08/2003
6552238Separation of heavy ends from streams of halogenated alkanes
Provided is a method and system for separating heavy ends from a halogenated alkane in a waste stream. The method includes: (a) removing a bottom fraction containing heavy ends from a catalyst recovery unit and conveying the bottom fraction to a vessel; (...
04/22/2003
6534688Dehydrochlorination stabilization of polychlorinated alkanes
A process is provided for the stabilization of polychlorinated alkanes against dehydrochlorination. The process comprises adding a phenol compound to a polychlorinated alkane such that the dehydrochlorination of the polychlorinated alkane is suppressed wh...
03/18/2003
6423189Process for the preparation of 1,3-dichloropropane
A process for the preparation of 1,3-dichloropropane by reacting bis(3-hydroxypropyl)ether with hydrogen chloride, optionally in the presence of tertiary basic nitrogen compounds or other tertiary aliphatic bases as catalysts, distilling off the 1,3-dichl...
07/23/2002
6323380Water removal in purification of vinyl chloride
Removal of water in a vinyl chloride monomer purification system is achieved through (1) providing a distillation column for separation of a liquid admixture of vinyl chloride, hydrogen chloride, and water into (a) an essentially pure vinyl chloride produ...
11/27/2001
6320087Adsorbent for separating halogenated aromatic compounds and separation method
An adsorbing and separating agent for halogenated aromatic compounds and an adsorbing and separating method for the compounds, using an adsorbent which has a porosity of from 0.20 cc/cc to 0.37 cc/cc, a packing density of from 0.50 g/ml to 0.70 g/ml, and ...
11/20/2001
6229059Process for the production of 1, 2-dichloroethane
Using a process for the production of 1,2-dichloroethane by reacting ethylene and chlorine in the liquid phase in the presence of a catalyst, the 1,2-dichloroethane produced being drawn off in the gaseous phase, the high-boilers being separated from the 1...
05/08/2001
6150573Concurrent production of trichloroethane isomers
1,1,1-Trichloroethane (viz., methylchloroform) and 1,1,2-trichloroethane are produced in the same reactor by feeding molecular chlorine and chloroethene (viz., vinyl chloride) as well as 1,1-dichloroethane to the reactor. The ratios at which the two trich...
11/21/2000
6121506Method for destroying energetic materials
Energetic materials, such as nitrocellulose, TNT, RDX, and combinations thereof, optionally in combination with chemical warfare agents, such as mustard gas, Lewisite, Tabun, Sarin, Toman, VX, and combinations thereof, are destroyed when chemically reacte...
09/19/2000
6101818Process for separating water from chemical mixtures
A method for separating water from a chemical mixture is provided. In the process of the invention, water is separated from a chemical mixture by contacting the chemical mixture with a water-soluble polymer....
08/15/2000
6093286Process for purifying n-butyl chloride
A process for purifying at least 90% pure n-butyl chloride which is present in a mixture with other C1 to C4 alkyl chlorides, C1 to C4 alcohols, esters, ketones, nitrites, and organic sulfur compounds. In this p...
07/25/2000
5998691Method and apparatus to destroy chemical warfare agents
Chemical warfare agents, including vesicants and nerve agents distributed throughout the world, are destroyed when chemically reacted according to the method and utilizing the apparatus of this invention. The method comprises reacting the chemical warfare...
12/07/1999
5914432Hydrogenation of halogenated compounds
A halogenated compound (I) containing one or more >C.dbd.O, olefinic and/or aromatic >C.dbd.C< groups is hydrogenated for producing a halogenated compound (II) having no or a decreased level of >C.dbd.O, olefinic and/or aromatic >C.dbd.C< groups. In the h...
06/22/1999
5882485Process for the separation of dimethyl ether and chloromethane in mixtures
A process for the separation of dimethyl ether and chloromethane in mixtures A process for the separation of dimethyl ether and chloromethane in mixtures by two distillation steps. In the first step, the mixture is subjected to an extractive distillation ...
03/16/1999
5843286Process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane with water as extractant
A process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane by extractive distillation with water as extractant. The mixture is prepared by reacting methanol with hydrogen chloride. It is then subjected to an extractiv...
12/01/1998
5789633Azeotropic or azeotrope-like compositions of hydrofluoric acid with dihaloethanes
The instant invention relates to azeotropic or azeotrope-like compositions of hydrofluoric acid with at least one of 1,1-dichloroethane, 1-chloro-1-fluoroethane and 1,1-difluoroethane. The invention also relates to manufacturing processes for separating h...
08/04/1998
5780695Process for the selective saturation of olefin-containing halogenated organic streams
A process for saturating an olefin-containing halogenated organic stream to produce saturated halogenated organic compounds while minimizing the hydrodehalogenation of the organic compounds....
07/14/1998
5744669Process for the conversion of a halogenated organic stream containing trace quantities of organic nitrates
A process for the conversion of a halogenated organic stream containing trace quantities of organic nitrates to produce a stream comprising hydrogenated hydrocarbonaceous compounds free from organic nitrates and halogenated organic compounds by means of c...
04/28/1998
5698750Methods for purifying and recovering contaminated refrigerants with aqueous solutions of bases
Refrigerants, such as Freon.RTM. 12 and other potential ozone depleting substances will be in short supply as their production is phased out, and until existing refrigeration equipment is retrofitted to receive more environmentally friendly refrigerants. ...
12/16/1997
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