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7759528 Acetonitrile removal from the olefinic feed of ether production processes using ionic liquids  
An enhanced ether production process from an olefinic cut containing at least one iso-olefin and from an alcohol comprises a stage of removal of the acetonitrile present in the hydrocarbon feed by...
7732648 Multistage catalytic process for olefin etherification  
A process for producing ethers by reacting alcohols and olefins in successive catalytic stages is disclosed. The process includes alternating catalytic reaction stages and separation stages.
7553994 Method for producing ditrimethylolpropane  
In the method of producing ditrimethylolpropane of the present invention, the distillation still residue obtained in the production of trimethylolpropane is subjected to crystallizing treatment...
7439405 Purification of propylene glycol monoalkyl ether  
The invention is a method of purifying a propylene glycol monoalkyl ether containing carbonyl impurities which comprises contacting the propylene glycol monoalkyl ether stream in the liquid phase...
7414159 Separation of liquid mixtures in a film evaporator  
A liquid mixture comprising at least one readily volatile and at least one sparingly volatile component is separated in a film evaporator by a process in which (i) a continuous stream of a liquid...
7335801 Polyglycerols and production thereof  
A polyglycerol composition contains diglycerol, triglycerol, and tetraglycerol each in a content of 5 percent by weight or more, has a total content of diglycerol, triglycerol, and tetraglycerol of...
7332634 Method for the continuous purification by distillation of 1,2-propylene glycol that accumulates during the synthesis of propylene oxide without coupling products  
The invention relates to a continuously operated process for the purification by distillation of the 1,2-propylene glycol formed as by-product in the synthesis of propylene oxide, wherein the...
7304188 Preparation of highly pure methyl tert-butyl ether  
The invention relates to a process for preparing methyl tert-butyl ether (MTBE) in qualities which are suitable for organic syntheses and for use as a specialty solvent from MTBE in fuel quality.
7141705 Etherification process  
A process for the etherification of C4, C5 and/or C6 tertiary olefins in a hydrocarbon feed with at least one C1 to C6 alcohol, preferably C1–C4 alcohols in a distillation column reactor, p...
7060865 Recovery of C4 olefins from a product stream comprising C4 olefins, dimethyl ether and C5+ hydrocarbons  
Disclosed is a process for removing DME from a stream containing C4 olefins. The process includes providing a first stream comprising C4 olefins, C5+ hydrocarbons, DME, and methanol. The first...
7022885 Purification on methyl tertiary butyl ether  
The present invention relates to purification of an MTBE process stream by contact in the liquid phase with a large pore zeolite such as 13X or Zeolite Y.
6984765 Separation of methanol, ethanol and/or dimethyl ether from hydrocarbon mixtures  
The present invention is a separation process for producing a methanol, ethanol and/or dimethyl ether stream from a first stream containing C3+ hydrocarbons. The first stream comprises C3+...
6977290 Process for preparing oligomeric aliphatic diols, polycarbonatediols based thereon and prepolymers thereof  
The present invention relates to a method for preparing oligomeric aliphatic diols, polycarbonatediols based thereon and NCO-terminated prepolymers obtainable therefrom. The inventive compounds may...
6927310 Tripropylene glycol production  
A method for forming multiple tripropylene glycol products of acrylate grade comprising forming a composition of dipropylene glycol, tripropylene glycol, tetrapropylene glycol and heavier, and at...
6924399 Method of manufacturing dimethyl ether  
Dimethyl ether is obtained with at low cost by transporting methanol under room temperature and atmospheric pressure from the methanol producing district to the dimethyl ether consuming district or...
6822125 Method for preparing dimethylether using a membrane reactor for separation and reaction  
The present invention relates to a method for preparing dimethylether from methanol using a membrane reactor, more particularly to a method for preparing dimethylether from methanol using a...
6613197 Method for isolation of barely volatile organic compounds  
A method and apparatus for isolation of a barely volatile organic compound in a sample suspected to contain the same, e.g. a dioxin, which includes continuously adding superheated steam and a...
6472568 Reaction and distillation device and etherification process  
The invention relates to a process for preparing at least one aliphatic monoalcohol, generally in excess, and at least one olefin. The process is performed in a distillation and reaction device...
6458856 Separation process for one-step production of dimethyl ether from synthesis gas  
An improvement to the process for separating dimethyl ether (DME) from byproducts in a one-step catalytic conversion of synthesis gas (syngas), the improvement comprising using a scrubbing solvent...
6417408 Production process for (poly)alkylene glycol monoalkyl ether  
The present invention provides a process for producing a (poly)alkylene glycol monoalkyl ether with high selectivity and high yield. In this process, the (poly)alkylene glycol monoalkyl ether is...
6387222 Continuous isolation of a high-melting material by distillation  
A method of distillation for separating a material which is solid at ambient temperature from a lower boiling and lower melting point material, and the apparatus.
6278029 Process for eliminating polar compounds on an etherification unit  
A process for eliminating at least pollutants including polar compounds present in a first fluid, with said first fluid sent to a subsequent treatment, e.g., an etherification process: a) the first...
6264800 Purification process  
A procedure is provided for the separation of close boiling impurities from products which have slightly higher polarity than the impurities, for example, separation of di-propylene glycol...
6232508 Process for manufacturing ether and high purity butene-1  
A process for the manufacture of ether from a feedstock containing isoolefins and linear olefins. The process is one which has a high conversion of isoolefins thereby permitting the separation of...
6218582 Method for the reduced formation of tertiary butyl alcohol in a finishing reactor in the manufacture of methyl tertiary butyl ether  
A method for the preparation of methyl tertiary butyl ether is provided wherein a mixture of methanol and substantially peroxides-free tertiary butyl alcohol are catalytically reacted to form a...
6214172 Preparation of methylglyoxal dimethyl acetal  
In a process for the preparation of methylglyoxal dimethyl acetal from methylglyoxal and methanol in the presence of an acidic ion exchanger, water is introduced in an amount sufficient to form an...
6197163 Process for removing impurities from petroleum products  
The impurity content, e.g. propionitrile, in a fraction containing C5 or C6 tertiary olefins obtained by cracking hydrocarbons is reduced by distilling with an alkanol and removing the impurity as...
6159344 Reaction and distillation device  
The invention relates to a distillation and reaction device having a reaction section and a distillation-reaction section. The distillation-reaction section has a distillation zone with at least...
6107526 Process for producing ethyl tertiary butyl ether  
A catalytic distillation process for producing high purity ethyl tertiary butyl ether that contains less than 0.6 weight percent ethanol, and preferably less than 0.07 weight percent ethanol, has...
6087539 Process for producing an ether compound  
A process for producing an ether compound represented by the general formula (II) or (III): ##STR1## wherein R1 and R2 represent each an alkyl group or a cycloalkyl group and n represents an...
6069284 Process for separating diisopropyl ether from isopropyl alcohol and water  
A process to separate diisopropyl ether from a mixture of diisopropyl ether, isopropyl alcohol, and water has been developed. The process begins with distilling, in a distillation column, the...
6037502 Etherification process  
This invention provides an improved etherification process that reduces the amount of acidic-ion-exchange-resin catalyst that is deactivated by nitriles. This process uses a water phase to remove...
5998675 Process for preparing tertiary alkyl ethers  
A process for preparing tertiary alkyl ethers comprises the steps of reacting C4-7 isoolefins of an olefinic hydrocarbon feedstock with an alkanol in the presence of a first catalyst in a reaction...
5985100 Process for separating butanol and dibutyl ether by means of dual-pressure distillation  
Butanol and dibutyl ether are separated from a mixture containing water, dibutyl ether and n-butanol, 2-butanol and/or isobutanol by a process in which a) the mixture is introduced into a first...
5973096 Process for purifying a polyether  
A process for purifying a polyether, which comprises adding to a polyether (A) containing a first salt, water (B) and a compound (C) which is capable of reacting with an ion constituting the first...
5908964 Process for preparing alkyl ethers and mixtures thereof  
The invention concerns a process for preparing a tertiary alkyl ether product. The process comprises reacting the isoolefins of an olefinic hydrocarbon feedstock in a reaction zone (1-3) with an...
5882485 Process for the separation of dimethyl ether and chloromethane in mixtures  
A process for the separation of dimethyl ether and chloromethane in mixturesA process for the separation of dimethyl ether and chloromethane in mixtures by two distillation steps. In the first...
5847224 Method for improving the color of MTBE, ETBE and TAME  
A process for improving the color of oxygenates, such as MTBE, ETBE and TAME, which utilizes a hydrogenation treater in the presence of a catalyst, containing at least one noble metal, along with a...
5847230 Nitrile removal in an etherification process  
In an etherification process that uses an FCC effluent as a source of isoolefins, the buildup of nitrites in an alcohol-containing stream that is recycled to the etherification zone is prevented by...
5843286 Process 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...
5817906 Process for producing light olefins using reaction with distillation as an intermediate step  
The present invention relates to a process for the production of light olefins comprising olefins having from 2 to 4 carbon atoms per molecule from a crude oxygenate feedstock. The crude oxygenate...
5811597 Method for the manufacture of methyl tertiary butyl ether from tertiary butyl alcohol and methanol  
Methyl tertiary butyl ether is prepared from contaminated TBA by reactively distilling the contaminated TBA in a reactive distillation column to provide a lower boiling isobutylene fraction and a...
5792899 Process for the management of polynuclear aromatic compounds produced in a hydrocarbon dehydrogenation reaction zone  
A process for the management of polynuclear aromatic compounds produced in a hydrocarbon dehydrogenation zone wherein the effluent from the hydrocarbon dehydrogenation zone is contacted with an...
5763685 Use of a second stage reactor in the manufacture and recovery of methyl tertiary butyl ether  
MTBE is prepared from TBA and MeOH by passing a feed mixture comprising TBA and MeOH through a primary MTBE reaction zone to form a primary reaction product containing MTBE, unreacted TBA,...
5750800 Process for producing diisopropyl ether from propane  
An integrated process to produce diisopropyl ether from propane has been developed. In a first reaction zone the propane in a feedstock, after any hydrocarbons containing four or more carbon atoms...
5750799 Dimethyl ether production and recovery from methanol  
A process for production and recovery of dimethyl ether by dehydration of methanol which significantly reduces the distillation duties associated to the preparation of the fresh methanol feed stock...
5741951 Conjoint manufacture of MTBE and diisobutylene  
Methyl tertiary butyl ether and diisobutylene are prepared by reacting methanol with tertiary butyl alcohol to provide an etherification reaction product containing methyl tertiary butyl ether,...
5741953 Use of reactive distillation in the manufacture of methyl tertiary butyl ether  
An aqueous methanol feed stream contaminated with tertiary butyl alcohol is charged to a reactive distillation column having a reaction distillation section in the upper portion thereof containing...
5741952 Catalytic decomposition of peroxides to purify a methyl tertiary butyl ether recycle stream  
An MTBE recycle stream (which consists mainly of TBA and methanol) contaminated with residual amounts of tertiary butyl hydroperoxide, ditertiary butyl peroxide and allyl tertiary butyl peroxide...
5723698 Catalytic decomposition of formate impurities in tertiary butyl alcohol and methyl tertiary butyl ether streams  
Disclosed is a method for decomposing formate esters, free acids and peroxides in a tertiary butyl alcohol stream to produce noncondensible gas products which comprises reacting said tertiary butyl...
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