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7619126 Method for obtaining crude 1,3-butadiene from a C4 fraction  
A process for recovering crude 1,3-butadiene from a C 4 fraction by extractive distillation using a selective solvent in a dividing wall column (TK) in which a dividing wall (T) is arranged in the...
7323579 Separation of propylene oxide from a mixture comprising propylene oxide and methanol  
A method of separating propylene oxide from a mixture (M) comprising 5 to 50 percent by weight propylene oxide and 50 to 85 percent by weight methanol, said method comprising (i) introducing...
7306705 Method for dehydrating composition comprising lithium bis(pentafluoroethanesulfonyl)imide  
A method for dehydrating an aqueous composition comprising lithium bis(pentafluoroethanesulfonyl)imide and at least one organic solvent, wherein a part of solvent is distilled off by distillation.
6802959 Separation of olefinic hydrocarbons from sulfur-containing hydrocarbons by use of a solvent  
A process for separating olefins from sulfur-containing hydrocarbons contained in a hydrocarbon feedstock is disclosed and includes contacting the hydrocarbon feedstock with N-hydroxyethyl...
6582565 Recovery of 3,4-epoxy-1-butene by extractive distillation  
Disclosed is a process for the recovery and purification of 3,4-epoxy-1-butene (epoxybutene) from mixtures comprising epoxybutene and aliphatic and aromatic hydrocarbons containing five to seven...
6395141 Separation of components from aromatic hydrocarbon mixtures thereof by extractive distillation  
A method of separating aromatic hydrocarbons and non-aromatic hydrocarbons, and aromatic hydrocarbons and naphtenes involves distilling a mixture of the components by an extractive distillation...
6375807 Separation of ethanol mixtures by extractive distillation  
A method of separating ethanol and ethyl acetate, and ethanol and water involves distilling a mixture of the components by an extractive distillation process in the presence of an extractive...
6315869 Process for purification of perfluorovinyl ethers  
A perfluorovinyl ether of the formula: RfO(CF 2 CFXO) n CFCF 2 (1) in which Rf is a perfluoralkyl group, X is a fluorine atom or a trifluoromethyl group, and n is a number of 0 to 20...
6136155 Separation of mesitylene from 1,2,4-trimetyhlbenzene by azeotropic distillation  
Mesitylene is difficult to separate from 1,2,4-Trimethylbenzene because of the proximity of their boiling points. They are readily separated by azeotropic distillation. Effective agents are...
6039846 Separation of 3-methyl-2-pentenal from n-butanol by azeotropic distillation  
3-Methyl-2-pentenal cannot be separated from 1-butanol by conventional rectification because of the proximity of their boiling points. 3-methyl-2-pentenal can be readily separated from n-butanol by...
6024841 Separation of 2-methyl-1-butanol and 3-methyl-1-butanol from 1-pentanol by extractive distillation  
2-Methyl-1-butanol and 3-methyl-1-butanol are difficult to separate from 1 pentanol by conventional distillation or rectification because of the proximity of their boiling points....
6017423 Separation of 3-methyl-2-pentenal from N-butanol by extractive distillation  
3-Methyl-2-pentenal cannot be separated from n-butanol by conventioal rectification because of the proximity of their boiling points. 3-methyl-2-pentenal can be readily separated from n-butanol by...
6007707 Process for the recovery of pure hydrocarbons from a hydrocarbon mixture  
Process for the recovery of pure hydrocarbons from a hydrocarbon mixture, more particularly, a high aromatics content hydrocarbon mixture, by extractive distillation in an extractive distillation...
6004435 Separation of cumene from 3-ethyl toluene by azeotropic distillation  
Cumene cannot be separated from 3-ethyl toulene by distillation because of the proximity of their boiling points. They are readily separated by azeotropic distillation. Effective agents are methyl...
5972173 Allyl alcohol purification  
Mixtures of allyl alcohol and n-propanol are separated by extractive distillation using propylene carbonate, N-methyl pyrrolidone or gamma-butyrolactone extractive distillation solvent.
5972172 Separation of 1,2,4-trimethylbenzene from 1,2,3-trimethylbenzene by extractive distillation  
1,2,4-Trimethylbenzene is difficult to separate from 1,2,3-trimethylbenzene by conventional distillation or rectification because of the proximity of their boiling points. 1,2,4-trimethylbenzene...
5961789 Separation of t-amyl alcohol from n-butanol by extractive distillation  
T-Amyl alcohol cannot be separated from n-butanol by distillation or rectification because of the closeness of their boiling points. T-Amyl alcohol is readily separated from n-butanol by extractive...
5951829 Separation of heteropoly compounds from polyethers, polyesters and polyether esters  
A method of separating heteropoly compounds from mixtures of polyethers, polyesters and/or polyether esters, a protic component and heteropoly compounds, wherein the protic component is removed...
5904815 Separation of t-amyl alcohol from n-butanol by azeotropic distillation  
t-Amyl alcohol cannot be separated from n-butanol by distillation or rectification because of the closeness of their boiling points. t-Amyl alcohol is readily separated from n-butanol by azeotropic...
5897750 Separation of acetone from isopropanol-water mixtures by extractive distillation  
Acetone cannot be separated from a mixture of isopropanol and water because of the closeness of their boiling points. Acetone can be easily separated from isopropanol and water by extractive...
5879517 Method for separating 2-butanol from t-amyl alcohol using certain organic compounds as the agent in extractive distillation  
2-Butanol cannot be sparated from t-amyl alcohol by distillation or rectification because of the closeness of their boiling points. 2-Butanol is readily separated from t-amyl alcohol by extractive...
5876569 Separation of methyl ethyl ketone from ethanol by extractive distillation  
Methyl ethyl ketone cannot be separated from ethanol by distillation or rectification because of the closeness of their boiling points. Methyl ethyl ketone is readily separated from ethanol by...
5865958 Method for separating cyclohexene  
Cyclohexene is separated from a mixture of cyclohexene and at least one of cyclohexane and benzene by subjecting the mixture to extractive distillation in the presence of an extraction solvent the...
5851362 Separation of 4-methyl-2-pentanol from 3-methyl-1-butanol by extractive distillation  
4-Methyl-2-pentanol cannot be separated from 3-methyl-1-butanol by distillation because of the closeness of their boiling points. 4-Methyl-2-pentanol can be easily separated from 3-methyl-1-butanol...
5849982 Recovery of styrene from pyrolysis gasoline by extractive distillation  
An extractive distillation process for separating at least one substituted unsaturated aromatic from a pyrolysis gasoline mixture, containing said aromatic and at least one close-boiling aromatic...
5800681 Separation of ethanol, isopropanol and water mixtures by extractive distillation  
Ethanol, isopropanol and water cannot be separated from each other by distillation or rectification because of minimum azeotropes. They are readily separated by extractive distillation. Effective...
5795447 Separation of 2-butanol from isobutanol by extractive distillation  
2-Butanol cannot be separated from isobutanol by distillation or rectification because of the closeness of their boiling points. 2-Butanol is readily separated from isobutanol by extractive...
5779862 Separation of 2-methyl-1-butanol and 3-methyl-1-butanol from 1-pentanol by azeotropic distillation  
2-Methyl-1-butanol and 3-methyl-1-butanol are difficult to separate from 1-pentanol by conventional distillation or rectification because of the proximity of their boiling points....
5776321 Separation of t-amyl alcohol from 1-propanol by azeotropic distillation  
1-Propanol cannot be separated from t-amyl alcohol by distillation or rectification because of the closeness of their boiling points. 1-Propanol is readily separated from t-amyl alcohol by...
5772853 Separation of 1-propanol from t-amyl alcohol by extractive distillation  
1-Propanol and t-amyl alcohol cannot be separated by distillation or rectification because of the closeness of their boiling points. 1-Propanol is readily separated from t-amyl alcohol by...
5738763 Separation of 2-methyl-1-propanol from 2-methyl-1-butanol by extractive distillation  
2-Methyl-1-propanol is difficult to separate from 2-methyl-1-butanol by conventional distillation or rectification because of the proximity of their boiling points. 2-Methyl-1-propanol can be...
5723026 Process for recovering pure benzene and pure toluene from aromatic hydrocarbon products  
The production of high purity benzene and high purity toluene is obtained by utilizing the initial gas separating column for the treatment of the aromatic containing starting material as a...
5723024 Separation of 2-methyl-1-propanol from 1-butanol by extractive distillation  
2-Methyl-1-propanol is difficult to separate from 1-butanol by conventional distillation or rectification because of the proximity of their boiling points. 2-Methyl-1-propanol can be readily...
5723025 Separation of 2-methyl-1-propanol from 2-butanol by extractive distillation  
2-Methyl-1-propanol is difficult to separate from 2-butanol by conventional distillation or rectification because of the proximity of their boiling points. 2-Methyl-1-propanol can be readily...
5720857 Separation of 1,2,4-trimethylbenzene from 1,2,3-trimethylbenzene by azeotropic distillation  
1,2,4-Trimethylbenzene is difficult to sepparate from 1,2,3-trimethylbenzene because of the proximity of their boiling points. They are readily separated by azeotropic distillation. Effective...
5718809 Separation of t-amyl alcohol from 2-methyl-1-propanol by extractive distillation  
T-Amyl alcohol and 2-methyl-1-propanol are difficult to separate by conventional distillation or rectification because of the proximity of their boiling points. T-Amyl alcohol can be easily...
5716499 Separation of 2-methyl-1-propanol from 1-butanol by azeotropic distillation  
2-Methyl-1-propanol is difficult to separate from 1-butanol by conventional distillation or rectification because of the proximity of their boiling points. 2-Methyl-1-propanol can be easily...
5705038 Separation of phellandrene from limonene by extractive distillation  
Phellandrene is difficult to separate from limonene by conventional distillation or rectification because of the proximity of their boiling points. Phellandreneecan be readily separated from...
5693193 Process for recovering propylene oxide  
Propylene oxide is recovered through the use of an additive in a distillation solution, resulting in suppressed side reactions and reduced loss of product. Propylene oxide is produced by oxidizing...
5693194 Separation of butyraldehyde from ethanol by extractive distillation  
Butyraldehyde cannot be separated from ethanol by conventional distillation or rectification because they form a minimum boiling azeotrope. Butyraldehyde can be readily separated from ethanol by...
5659095 Composition for inhibiting the polymerization of aromatic vinyl monomers  
A polymerization inhibitor composition for inhibiting the polymerization of aromatic vinyl monomers at elevated temperatures comprising: (a) a benzofuroxan derivative of the formula ##STR1##...
5658435 Separation of 2-methyl -1-propanol from 2-butanol by azeotropic distillation  
2-Methyl-1-propanol is difficult to separate from 2-butanol by conventional distillation or rectification because of the proximity of their boiling points. 2-Methyl-1-propanol can be easily...
5645695 Separation of 2-methyl-1-propanol from 2-methyl-1-butanol by azeotropic distillation  
2-Methyl-1-propanol is difficult to separate from 2-methyl-1-butanol by conventional distillation or rectification because of the proximity of their boiling points. 2-Methyl-1-propanol can be...
5582693 Separation of 3-carene and limonene by azeotropic distillation  
3-Carene and limonene cannot be separated from each other by rectification because of the closeness of their boiling points. They are readily separated by azeotropic distillation. Effective agents...
5538599 Phenol separation  
A process is provided whereby phenol is separated from 1-phenyl ethanol, acetophenone or mixtures by extractive distillation with sulfolane as extractive distillation agent which decreases phenol...
5470443 Separation of isopropanol from 2-butanone by extractive distillation  
Isopropanol is difficult to separate from 2-butanone by conventional distillation or rectification because of the proximity of their boiling points. Isopropanol can be readily separated from...
5466345 Separation of o-xylene from p-xylene and m-xylene by azeotropic distillation  
o-Xylene cannot be separated from p-xylene and m-xylene by conventional distillation or rectification because of the proximity of their boiling points. o-Xylene can be readily separated from...
5458741 Separation of benzene from close boiling hydrocarbons by extractive distillation  
Benzene is difficult to separate from cyclohexane or cyclohexene by conventional distillation or rectification because of the close proximity of their boiling points. Benzene can be readily...
5453166 Separation of ethanol from 2-butanone by extractive distillation  
Ethanol is impossible to separate from 2-butanone by conventional distillation or rectification because of the minimum boiling azeotrope between these two. Ethanol can be readily separated from...
5445716 Separation of ethanol from isopropanol by extractive distillation  
Ethanol is difficult to separate from isopropanol by conventional distillation or rectification because of the proximity of their boiling points. Ethanol can be readily separated from isopropanol...
Matches 1 - 50 out of 300 1 2 3 4 5 6 >