3365results about "Carbonyl compound separation/purification" patented technology

The present invention provides a method for the production of glycolaldehyde with high specificity. The hydrous thermolysis consists of the spraying of aqueous sugar solutions containing from 25 to 80% of water but preferably 30 to 60% water, as a fine mist into a reactor held at the between 500 and 600° C., but preferably between 520 and 560° C. and the condensation of the resulting vaporous product in a surface condenser with optional heat recovery. The residence time of the vaporous product in the reactor should be in the range 0.1–5 seconds, but preferably in the range 0.5 to 2 seconds. Aldose monomeric sugars, preferably glucose (also known as dextrose), are preferred for use in the aqueous solution. The yield of glycolaldehyde in the condensed liquid is minimum 50% by weight of the sugar fed for glucose solutions.

The present invention provides an improved process for the hydrogenation of 3-hydroxypropanal to 1,3-propanediol which comprises purifying an aqueous solution of 3-hydroxypropanal by contacting said aqueous solution with a purifying agent prior to hydrogenation.

The present disclosure relates to a process for preparing a substantially total lipid fraction from fresh krill, a process for separating phospholipids from the other lipids, and a process for producing krill meal.

An improved process for separation of liquid mixtures involves vapor stripping followed by mechanical compression of the vapor which is then exposed to a permeation membrane for separation of the compressed vapor.

A reaction product and an imide compound can be separated from a reaction mixture obtained by reacting a substrate in the presence of the imide compound having an imide unit represented by the following formula (1): wherein X represents an oxygen atom, a hydroxyl group or an acyloxy group by (A1) a solvent-crystallization step for crystallizing the imide compound with at least one solvent selected from the group consisting of a hydrocarbon, a chain ether and water, (A2) a cooling-crystallization step for crystallizing the reaction product by cooling, or (B) an extraction step for distributing the reaction product into a phase of a water-insoluble solvent and the imide compound into a phase of an aqueous solvent, respectively by using the aqueous solvent containing at least water and the water-insoluble solvent separable from the aqueous solvent. Further, the imide compound and the metal catalyst can be separated from a mixture containing the imide compound and the metal catalyst by (C) a solvent-crystallization step for crystallizing the imide compound by using a solvent for crystallization, (D) an absorption step for absorbing the metal catalyst by an absorption treatment, or (E) an extraction step for distributing the imide compound into a phase of a water-insoluble solvent and the metal catalyst into a phase of an aqueous solvent, respectively by using the aqueous solvent containing at least water and the water-insoluble solvent separable from the aqueous solvent.

The invention relates to method and equipment system for separating and recovering organic oxygen-containing compounds in a Fischer-Tropsch synthesis water phase. The equipment system is integrated by adopting twelve towers including a mixed acid cutting tower, an acetaldehyde rectifying tower, a methanol/ethanol dividing tower, a methanol extraction rectifying tower, a methanol rectifying tower, an acetaldehyde removing tower, an ethanol tower, a propanol concentration extracting tower, a propanol intermittent azeotropic distillation tower, a carboxylic acid extraction tower, a carboxylic acid intermittent rectifying tower and an extraction agent recovering tower matched with the carboxylic acid extraction tower for use. By applying the method and equipment system disclosed by the invention, more than ten kinds of organic oxygen-containing compounds such as acetaldehyde, acetone, methanol, ethanol, normal propyl alcohol, normal butanol, acetic acid, metacetonic acid, butyric acid, butanone and the like can be separated from raw materials; and the products can respectively reach the industrial purity. The method and equipment provided by the invention are economic, effective and reasonable; and according to the method and equipment, efficiency of Fischer-Tropsch synthesis industrial enterprises can be greatly increased, production cost is reduced and goal of clean production can be achieved.

The invention relates to a method for extracting tanshinone which comprises the following two steps: first, alcohol extraction process: separating the extraction liquid and dregs with the danshen liposolubility content from danshen medicine materical crude slices or disintegrated danshen medicinal materials by bath method, hypersonic extraction or microwave extraction in condition of normal temperature or heating, and reserving, adding correct concentration alcohol into the dregs, inverse flow extracting with heating to get the extraction, which combined with the extraction get from the first extraction, removing the solid impurities by the methods of filtration, centrifugation or deposition, and reserving. Second, isolation method separation: adding the medicine liquid get from the said alcohol extraction process to a macroreticular resinous adsorbent column, gradient eluting by alcohol with a finite concentration respectively to get the extraction I (with cryptotanshinone and dihydrotanshinone I) and extraction II (with tanshinone IIA and tanshinone I).

A process for extracting the active components (farnesol, fatty aldehyde and edible fibres) from the momordica grosvenori dregs generated after extracting glycoside includes extracting seed oil, extracting farnesol by fraction, extracting fatty aldehyde from the water phase, and preparing edible fibres from the dregs by chemical or enzyme method. Its advantages are simple process and high output rate.

The invention relates to a method for separating a water phase side product of Fischer-Tropsch synthesis. The method mainly solves the problem that the water phase side product of the existing Fischer-Tropsch synthesis reaction is discharged directly, thereby being uneconomical and polluting the environment. The invention solves the problem well by the technical proposal which comprises the stepsas follows: the water phase side product enters into the middle part of an ordinary rectifying tower 1; a distillate stream I with the boiling range of 50 DEG C to 120 DEG C is extracted from a lateral line; a light component with the boiling point lower than 40 DEG C is obtained at the top of the tower; a heavy component with the boiling point higher than 120 DEG C is obtained at the bottom of the tower; distillate at the lateral line is carried out the rectifying separation through a separation tower 2, an extractive rectifying column 3, an azeotropic rectifying column 4, an acetic acid extracting tower 5, a solvent recycling tower 6 and an extracting agent recycling tower 7 to obtain acetone, methanol, ethanol, normal propyl alcohol and acetic acid basic organic raw material. The invention can be applied to the industrial production for disposing the water phase side product of the Fischer-Tropsch synthesis.

The invention relates to a process for separating acetone, butanol and ethanol in situ by coupling biomass fermentation and pervaporation. A pervaporation separation process is coupled with a fermentation process, and ABE (acetone, butanol and ethanol) solvents produced by fermentation are removed in situ and in time through a pervaporation film, so inhibiting effects of the ABE solvents produced in the fermentation process on the growth of microbial cells are greatly reduced and production intensity and efficiency of ABE fermentation are enhanced. Simultaneously, compared with an ordinary rectification process, the process also greatly lowers energy consumption for separating the ABE solvents produced by biomass fermentation, shortens production time and greatly lowers production cost of fuel butanol.

The invention discloses a production method for natural benzaldehyde, comprising the following steps: putting cinnamyl aldehyde and an alkaline aqueous solution into a reactor, causing the cinnamyl aldehyde and the alkaline aqueous solution to be subject to anti-aldolisation, carrying out sectional type temperature control and cooling on natural benzaldehyde-containing steam generated by the reaction through a tertiary condensation system, and then collecting products in a product receiver. In the production method for the natural benzaldehyde, the tertiary condensation system is adopted to substitute for the single condensation device in the prior art, thereby improving the production efficiency, reducing the energy consumption and overcoming the defects of the existing production methodfor the natural benzaldehyde on the premise of ensuring the natural degree and pure smell of the nature benzaldehyde.

The invention relates to a method for extracting refined curcumin and curcuma oil from curcuma. The method comprises the following steps: the curcuma is cleaned, dried in the shade, crushed into 30-40 mesh curcuma powder, low-carbon alcohol and alkyl hydrocarbon are made into a mixed solvent at the volume ratio of 1:1-3, the curcuma powder and the mixed solvent are mixed at a weight ratio of 1:3-5 for extraction twice; the extracts are merged, filtered, separated and removed from dregs, the obtained filtrate is condensed, the concentration level is controlled at 60-90%, and the solvent is recovered; a separating agent containing 0-3% salt is added to the residual concentrated solution, the addition amount of the separating agent is 0.5-2 times of the volume of the concentrated solution, the obtained mixture is kept standing for demixing after evenly stirred; a supernatant is separated and condensed, and the alkyl hydrocarbon is recovered to obtain the curcuma oil; a subnatant is adsorbed by a macroporous absorbent resin, flushed to remove water soluble impurities, and eluted with a desorbent, the solvent is condensed and recovered to crystallize the curcumin, thus obtaining the curcumin with the content more than 95%.

This invention relates to purification method of intermedium myristic aldehyde and device. The device has set heater, fractionating tower, falling film reboiler, falling film evaporator and condenser. Raw myristic aldehyde outlet of heater connect with fractionating tower inlet; steam outlet of fractionating tower top connect with condenser steam inlet; one way of first condenser condensed fluid outlet connect with reflux liquid inlet of fractionating tower top, the other way outflow low boiler of beta - ionone. Dephlegmation tower bottom outlet respectively connect with falling film reboiler overhead entrance and falling film evaporator overhead entrance; falling film reboiler bottom outlet connect with fractionating tower bottom entrance; one way of falling film evaporator outlet connect with second condenser entrance, the other way is outlet of high boil thing; second condenser outlet is outlet of refine myristic aldehyde. Whil purification first send raw myristic aldehyde to fractionating tower, gain distillate from fractionating tower top. The distillate enter fractionating tower bottom tower kettle, pass through falling film evaporator to remove high boil thing.

The invention relates to methods of assessing the polymorphic form of a substance by assessing Raman-shifted radiation scattered by a particle of the substance. The method is useful, for example, for assessing particle sizes and size distributions in mixtures containing both particles of the substance and other materials. The invention also relates to methods of selecting and controlling polymorph formation by illuminating a material with non-resonant (i.e., non-absorbed) laser radiation as it is thermally driven through a phase transition temperature.

The invention relates to a separation and recovery method of organic matters in high-temperature Fischer-Tropsch synthesis reaction water. The method comprises steps of: (1) separating and recoverying aldehyde after rectifying and removing organic acid; (2) rectifying and separating ketone/n-propanol; (3) rectifying and separating acetone/butanone; (4) refining acetone; (5) extracting and separating butanone/ethanol; (6) rectifying and separating ethanol/n-propanol; further rectifying alcohol-containing aqueous sollution obatained from the bottom of a column for rectifying and separating ketone/n-propanol, ethanol containing little water and obtained from the top of the column, and n-propanol alcohol-containing aqueous sollution obatained from the bottom of the column; (7) azeotropic rectifying ethanol sollution obtained by exaction and separation, and ethanol sollution with n-propanol separated to prepare anhydrous ethanol; (8) adding calces in n-propanol aqueous sollution, distilling to obtain n-propanol products; the invention effectively and orderly separates and recoveries aldehyde, acetone, butanone, ethanol and n-propanol, the purity of each product is above 95% and the yield is above 90%.

The invention discloses a method for extracting and separating curcumin. The method comprises the following steps: (1) extraction: crushing curcuma longa, adding 2-10% alkaline water to extract to obtain an alkaline water extracting solution; (2) degreasing: adding an organic solvent petroleum ether, 6# solvent oil, cyclohexane, benzene, methylbenzene or ethyl acetate into the alkaline water extracting solution, stirring and extracting for 1-2h, and then, standing for 1-2h to separate out an organic layer; (3) acid deposition: regulating the pH value of the extracting solution to 1-2 by using hydrochloric acid to separate out the curcumin, filtering, and drying to constant weight to obtain a crude product of the curcumin; and (4) dissolving the crude product of the curcumin by using an organic solvent methanol, ethanol, acetone, n-butanol or isopropanol, filtering, adding distilled water into the filtrate, carrying out freezing crystallization at the temperature of 0-5 DEG C for 2-8h, filtering, and drying to obtain a curcumin product. The method is low in production cost; the prepared curcumin product is high in purity up to over 98.5%.

The invention discloses a productive technology of vanlillin by a glyoxylic acid method. The productive technology comprises a synthesis process, a fractionation process and a purification process, wherein the synthesis process comprises condensation treatment, oxidation treatment and decarboxylation treatment of methyl catechol and glyoxylic acid. The productive technology particularly comprisesthe following steps: respectively converting the methyl catechol and the glyoxylic acid into guaiacol sodium and sodium glyoxylate in a sodium hydroxide system; carrying out condensation treatment onthe guaiacol sodium and the sodium glyoxylate; after recovering the unreacted methyl catechol in a condensation liquid, carrying out oxidation treatment, namely carrying out catalytic oxidation on anethanol group in 4-hydroxy-3-methoxybenzene sodium glycolate by using copper oxide in the sodium hydroxide system to form a ketone group, thereby generating a corresponding ketonic acid compound; after separating red copper oxide particles from an oxidation liquid, carrying out decarboxylation treatment, namely using sulfuric acid to acidize the oxidation liquid, and simultaneously converting an acid group in the ketonic acid compound into carbon dioxide so as to generate 4-hydroxy-3- methoxybenzaldehyde; and carrying out the fractionation process and the purification process to obtain the vanlillin.