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7301055 |
Process for removing methanol from formaldehyde-containing solutions
Process for removing methanol from formaldehyde-containing solutions. The present invention relates to a process for removing methanol from formaldehyde-containing solutions, with methanol being...
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7211703 |
Method of separating E and Z isomers of an alkene alcohol and derivatives thereof
E and Z isomers of alkene alcohols and/or alkene alcohol derivatives are separated by substantially continuously contacting an ion exchange medium which is ion exchanged with silver and/or copper...
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7157610 |
Process for recovering methanol
A process for recovering methanol from mixtures containing methanol and water, comprising multistage evaporation with heat integration, wherein the pressure is reduced from each stage to the next,...
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7141611 |
High molecular weight primary aliphatic alcohols obtained from natural products and uses thereof
This invention provides an isolated mixture of higher molecular weight primary aliphatic alcohols having 20, 22, 24, 26, 27, 28, 30, 32 and 34 carbon atoms and having enhanced purity. This...
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7122709 |
Method for obtaining ethanol
A method for obtaining ethanol from a feed solution utilizes an extractant comprising a mixture of at least one alkane and at least one aliphatic alcohol having the formula
wherein R 1 , R 2 ,...
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7034060 |
Polycosanols from Ericerus pela wax
The present invention provides a novel method for the preparation of a unique profile of primary aliphatic alcohols, having 24 to 30 carbon atoms, from the wax secreted by the insect Ericerus pela...
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7034193 |
Method for purifying spent acid
A method for purifying a spent acid catalyst from an acid catalyzed chemical reaction that generates a mixture of a product, spent add and tar, includes the steps of separating the mixture of...
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7002045 |
Ortho ester-based surfactant, its preparation and use
The present invention relates to a new ortho ester-based surfactant, where the hydrophobic and hydrophilic parts are connected by ortho ester linkages to the molecule. The ortho ester has the...
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6818799 |
Process for removing tar from spent acid
There is a process for removing by-product tar during the manufacture of isopropyl alcohol. The process comprises the following: a) reacting propylene with concentrated sulfuric acid and water to...
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6770790 |
Purification of tertiary butyl alcohol
The invention is a method to purify tertiary butyl alcohol by contact with at least two solid adsorbents comprising aluminum oxide and a large pore zeolite such as zeolite X. The purification...
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6596776 |
High molecular weight primary aliphatic alcohols obtained from natural products and uses thereof
The present invention relates to a naturally obtained mixture of higher molecular weight primary aliphatic alcohols which contain 20 to 34 carbon atoms. This invention also relates to the process...
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6225354 |
High molecular weight primary aliphatic alcohols obtained from beeswax and pharmaceutical use thereof
The present invention relates to a naturally obtained mixture of higher molecular weight primary aliphatic alcohols which contain 24 to 34 carbon atoms. This invention also relates to the process...
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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...
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5789629 |
Separating 3-methyl-1-butanol from 1-pentanol using certain organic compounds as the agent in extractive distillation
3-Methyl-1-butanol is difficult to separate from 1-pentanol by conventional distillation or rectification because of the proximity of their boiling points. 2 Methyl-1-butanol can be easily...
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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...
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5585527 |
Continuous distillation and membrane process
A process for separating a first component of a process stream from a second component of a process stream in a single vessel has been developed. The separation process uses an apparatus having a...
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5559254 |
Separation of a mixture of methanol and tetrahydrofuran into its constituents
A process is disclosed for separating a mixture of methanol and tetrahydrofuran into its components. The separation is carried out in the liquid or gaseous phase through an organophilic membrane,...
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5543564 |
Process for releasing acidic organic compounds from salts thereof by carbon dioxide
This invention embodies a process for releasing acidic organic compounds in high yield and good purity from aqueous solutions of their salts which comprises converting the salts by carbon dioxide...
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5494556 |
Method of and an apparatus for separating a liquid mixture
A method of separating a liquid mixture wherein the liquid mixture is heated; the heated liquid mixture is supplied to a pervaporation membrane module to separate a permeable component of the...
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RE35107 |
Recovery of isopropyl acetate and ethanol from an isopropyl acetate ethanol and water-containing stream
High purity isopropyl acetate and ethanol are recovered from a process stream containing isopropyl acetate, ethanol and water by a multiple step process including extracting substantially all of...
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5430197 |
Recovery of alcohol from hydrocarbon streams
Excess alcohol, e.g. methanol contained in a C 4 -C 6 hydrocarbon stream is removed in process using less water and energy than a conventional water wash by subjecting the stream to a first...
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5417814 |
Separation of 3-methyl-2-butanol from 2-pentanol by extractive distillation
3-Methyl-2-butanol is difficult to separate from 2-pentanol by conventional distillation or rectification because of the proximity of their boiling points. 3-Methyl-2-butanol can be readily...
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5413717 |
Method of recovering MTBE from wastewater
Dialkyl ethers having 5 to 7 carbon atoms; e.g. MTBE, and alcohols having 1 to 4 carbon atoms are extracted from wastewater with contaminant-free gasoline. Wastewater saturated with contaminants is...
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5360520 |
Separation of 2-butanol from t-amyl alcohol by extractive distillation
2-Butanol is difficult to separate from t-amyl alcohol by conventional distillation or rectification because of the proximity of their boiling points. 2-Butanol can be readily separated from t-amyl...
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5358608 |
Separation of 1-propanol from 2-butanol by extractive distillation
1-Propanol is difficult to separate from 2-butanol by conventional distillation or rectification because of the proximity of their boiling points. 1-Propanol can be readily separated from 2-butanol...
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5348624 |
Process for separating ethyl tert-butyl ether and ethanol
For separating ETBE and ethanol the following principal stages are employed: (1) Extraction of ethanol by water, the raffinate being ETBE saturated in water and the extract an ethanol/water mixture...
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5320715 |
Separation of 1-pentanol from cyclopentanol by extractive distillation
1-Pentanol is difficult to separate from cyclopentanol by conventional distillation or rectification because of the closeness of their boiling points. 1-Pentanol can be readily separated from...
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5294304 |
Process for the recovery of absolute ethanol by vapor compression extractive distillation
This invention relates to a process for the production of absolute alcohol from aqueous alcohol, whereby saving of energy to a greater extent is rendered possible in a more simple process, as...
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5292973 |
Phosphine oxide removal from compounds formed by a Wittig reaction
An improvement is proposed for the removal of the precipitates of a phosphine oxide compound as a by-product from a mixture thereof with an olefin compound obtained by the Wittig reaction for the...
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5284983 |
Process for purifying aqueous crude ethanol solution
Disclosed is a purification process for removing lipophilic impurities coined in an aqueous crude ethanol solution, in particular, for efficiently removing impurities consisting of C 3 -C 4 ...
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5264085 |
Method of separating components of phenols mixture by distillation
A method of continuously distilling off the components of a mixture containing phenols, water and methanol using a single distillation column, wherein methanol is recovered from the top of the...
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5262013 |
Coolant recycling method and apparatus
A coolant recycling apparatus has a boiler and condenser for distilling a glycol and water from a used coolant. The glycol and water are recombined in a mixing tank to form a mixture having a...
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5185481 |
Method for the separation of impurities from crude ethanol aqueous solution
The present invention is a method for the separation of impurities from a crude ethanol aqueous solution, comprising of; (i) extracting lipophilic impurities within the crude ethanol aqueous...
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5152876 |
Separation of methylene chloride from the lower alcohols by extractive distillation
Methylene chloride cannot be completely separated from methanol or ethanol by conventional distillation or rectification because of the mimimum boiling azeotrope. Methyelne chloride can be readily...
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5053563 |
Method to concentrate and purify alcohol
The present invention relates to a method and an apparatus to condense and rectify alcohol, and more particularly to a method and an apparatus suitable for the energy-saving condensation and...
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4956052 |
Process for separation using supercritical fluid
A process for separation of components of a mixture of more than one organic substance or of a mixture of at least one organic substance and water by extraction using a supercritical fluid as an...
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4761505 |
Process for recovery of alcohols from sulfuric acid streams
According to the process of the present invention, carboxylic acids are recovered from aqueous strong acid mixtures thereof which mixtures are formed as an alcohol-depleted phase by the extraction...
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4760201 |
Process for recovering alcohols from sulfuric acid streams (CS-342)
According to the process of the present invention, alcohols are recovered from aqueous mixtures thereof with a concentrated strong acid by contacting such alcohol-containing aqueous concentrated...
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4715932 |
Method to separate polar organic compounds, in particular aliphatic alcohols, from fermentation fluids
This invention relates to a method for separating organic compounds, particularly lower aliphatic alcohols from fermentation fluids. This is accomplished by the use of a two-step extraction process...
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4692432 |
Two cycle process for producing fuel-grade ethanol from dilute aqueous mixtures
The beer is fed to a first solvent extraction column together with an organic solvent for alcohol which solvent is immiscible in water. The alcohol-organic solvent phase is extracted a second time,...
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4678583 |
Use of hydrates for aqueous solution treatment
A process for forming a purified solute from an aqueous solution is provided whereby a mixture of an extractant, a hydrate former and the aqueous solution is first formed. The hydrate former forms...
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4659866 |
Continuous preparation of furmamide
Formamide is prepared continuously from methyl formate and ammonia, pure methanol being recovered, by a process wherein (a) the reaction of methyl formate and ammonia is carried out...
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4628116 |
Vinyl bromide extraction of butyric acid and butanol from microbial fermentation broth
The process of extracting butyric acid and normal butanol from microbial fermentation broth, comprising contacting an aqueous solution of a microbial fermentation broth with vinyl bromide to...
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4581475 |
Process for continuously producing alcohols
A process for producing a lower aliphatic alcohol by splitting ethers whereby ethers are reacted at an elevated temperature and pressure with an excess of water in the presence of acidic hydration...
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4578525 |
Process for extracting polar organic compounds, in particular lower aliphatic alcohols, from their aqueous solutions, and fluids particularly suitable for this purpose
A process is presented for extracting polar organic compounds, in particular lower aliphatic alcohols, out of their aqueous solutions, which is based on the use of fluids which contain a...
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4547354 |
Process for preparing hydrogen peroxide
An improved process for the acid-catalyzed hydrolysis tertiary butyl hydroperoxide to form hydrogen peroxide wherein an organic solvent is added to the hydrolysis zone, which solvent promotes the...
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4544779 |
Extraction of alcohols with phosphine oxides
A method for the extraction of lower alcohols from aqueous solutions by contacting said solutions with various phosphine oxides, in the presence or absence of alkali or alkaline earth metal salts,...
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4538010 |
Alcohol recovery process
According to the process of this invention, saturated mono-alcohols are recovered from solutions containing such mono-alcohols together with a carboxylic acid extraction solvent therefor by passing...
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4520213 |
Method for solvent recovery in solvent separation of ethanol from water
A process for the separation of ethanol from water using solvent extraction at elevated pressures is disclosed. Separation is effected by contacting aqueous ethanol with either propylene (propene),...
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4510242 |
Process for producing fuel grade alcohol by solvent extraction and carrier gas stripping
Alcohol substantially free of water is prepared by fermenting a fermentable biomass feedstock in a fermentation unit, thereby forming an aqueous fermentation liquor containing alcohol; extracting...
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