219 results about "Solvent flow" patented technology

An apparatus for monitoring a parameter of a solvent during a drying process is described. The apparatus includes a light source providing at least one light beam and a detection system receiving a signal corresponding to the at least one light beam transmitted through a vapor of the solvent flowing through a diagnostic region. A processor can determine from the signal at least one solvent parameter associated with the vapor of the solvent, and the processor can determine from the at least one solvent parameter the instantaneous mass flux of the vapor of the solvent.

The invention discloses a polymer purification device and a purification method. The purification device comprises a solvent supply system and a washing system, wherein the solvent supply system comprises a solvent kettle, a solvent circulation pipe and a heater, one end of the solvent circulation pipe is connected with the solvent kettle, the other end of the solvent circulation pipe is connected with the washing kettle, the heater is used for heating washing solvents in the solvent kettle so that the washing solvents flow into the washing kettle through the solvent circulation pipe, the washing system comprises a washing kettle, a motor, a condenser and a siphon, the motor and the condenser are respectively arranged at the top of the washing kettle, one end of the siphon is connected with the washing kettle, the other end of the siphon is connected with the solvent kettle, and washing solvents in the washing kettle flow back into the solvent kettle through the siphon. The polymer purification device provided by the invention has the advantage that the structure is simple, and the purification method adopting the purification device has the advantages that the energy consumption is low, the purification effect is good, and the automation can be realized.

The invention refers to a method for producing lactide. The character lies in: under the protection of inert gas, the invention uses instillation to eliminate the water in lactic acid, then uses an azeotropic solvent which can make the condensation reaction advantage to generate lactide, the solvent is good solvent to lactide and the bad solvent to lactic acid polymer, the solvent flows back in the protection of inert gas continuously, make the lactic acid is condensed into lactide, then decompression distillation is carried on, through recrystallization there gets the high purity lactide.

Disclosed is a method of producing a chemically pure and stably dispersed organic nanoparticle colloidal suspension using an ultrafast pulsed laser ablation process. The method comprises irradiating a target of an organic compound material in contact with a poor solvent with ultrashort laser pulses at a high repetition rate and collecting the nanoparticles of the organic compound produced. The method may be implemented with a high repetition rate ultrafast pulsed laser source, an optical system for focusing and moving the pulsed laser beam, an organic compound target in contact with a poor solvent, and a solvent circulating system to cool the laser focal volume and collect the produced nanoparticle products. By controlling various laser parameters, and with optional poor solvent flow movement, the method provides stable colloids of dispersed organic nanoparticles in the poor solvent in the absence of any stabilizing agents.

The invention discloses a method for extracting mesitylene fractions rich in hydrocracking C 9 by combination of continuous lateral line distillation and extractive distillation, comprising the following steps: (1) material hydrocracking C 9 aromatic is added into a continuous lateral line distillation tower, the tower bottom is heated, fractions 2 with a boiling range of 155 DEG C to 170 DEG C, fractions 3 with a boiling range of 170 DEG C to 190 DEG C and fractions 4 with a boiling range of 190 DEG C to 210 DEG C are obtained at the same time after pretreatment, content of mesitylene in the fractions 2 achieves above 90 percent, and a little mesitylene and a great deal of heavy aromatic are contained in the fractions 3 and the fractions 4; (2) the fractions 2 enter an extractive distillation tower, content of mesitylene fractions on the top 5 of the extractive distillation tower achieves above 98 percent, and fractions 6 containing a great deal of extraction solvent and heavy aromatic hydrocarbon are left at the tower bottom; (3) the fractions 6 are treated through a solvent recovery tower, heavy aromatic fractions 7 are left on the top of the solvent recovery tower, a tower reactor extracts solvent, and the solvent flows into the extractive distillation tower for recycling use. The invention only needs one distillation tower, obviously improves the efficiency, and lowers the energy consumption and the cost.

The invention relates to a method and a device for purifying a graphene oxide/graphene solution. According to the method, the graphene oxide/graphene solution to be purified is introduced into a dialysis cavity, wherein the dialysis cavity is located between a cathode and an anode, a channel for the graphene oxide/graphene solution is located in the middle of the dialysis cavity, and solvent flowing channels are formed between the dialysis cavity and the cathode as well as between the dialysis cavity and the anode; the graphene oxide/graphene solution to be purified enters the dialysis cavity from one end of the dialysis cavity and is exposed to the action of an electric field between the cathode and the anode; ions and charge particles in the graphene oxide/graphene solution to be purified migrate to the electrodes with opposite charges by respectively transmitting through the wall of the dialysis cavity and then are taken way by solvent flows; and the residual purified graphene oxide/graphene solution flows out form the dialysis cavity. Compared with the prior art, the method and the device have the advantages of low cost, high efficiency, suitability for mass production and the like.

The present invention relates to a method for preparing a sustained-release microsphere which can control the long-term release of a drug. More particularly, as the preparation of a microsphere in which a drug is loaded in a carrier comprising a biodegradable polymer, the present invention relates to a method for preparing a sustained-release microsphere wherein a solvent intra-exchange evaporation method by means of co-solvent is used for suppressing the initial burst release of physiologically active substance, to release the physiologically active substance in the body continuously and uniformly.

The invention relates to a method for extracting phenol compounds from direct coal liquefied oil through extractive distillation. An extractive distillation solvent (hereinafter referred to as solvent) adopted in the method is glyceryl triacetate and/or sulfolane, or a mixed solvent formed by mixing glyceryl triacetate and/or sulfolane and one or more selected from glycerol, triethanolamine, triethylene glycol, tetraethylene glycol, dimethyl sulfoxide and diethanol amine according to any proportion. The method is used for extracting phenol compounds from direct coal liquefied oil in an extraction distillation tower by using the solvent, then, a solvent flow rich in the phenol compounds enters a recovery tower and is separated, the phenol compounds discharged from the top of the recovery tower are recovered after being cooled to obtain phenol products, and the solvent is recycled after being discharged from the bottom of the recovery tower. The method has the characteristics of high product purity, low system energy consumption, no wastewater generation, no acid and alkaline waste and no corrosion to equipment.

An apparatus for non-contact cleaning a paint spray tip of a spray gun. The apparatus includes a housing with a top and an opening formed in the top to receive the spray tip. At least one drier nozzle is fluidly connected to a source of compressed air so that discharge from the nozzle impinges upon and dries the spray tip. Similarly, at least one solvent nozzle is also attached to the housing around the opening and discharges solvent on the spray tip when positioned in the housing opening. One or more down flow nozzles are also mounted to the housing to create a downdraft through the housing opening to facilitate cleaning and drying of the spray gun spray tip. A heated fluid also flows through the housing in close proximity to the fluid passageways for the drier nozzle and solvent nozzle in order to heat both the drier nozzle air flow and solvent flow to facilitate cleaning of the spray tip.

The invention relates to a flushing and detecting system of a triple valve, a solvent valve and a spray gun of an automata, which comprises a compressed air supply device, a solvent supply device, a diaphragm pump and a plurality of pipelines, wherein the diaphragm pump is connected with the solvent supply device to pump out solvents in the solvent supply device with certain pressure; the pipelines are correspondingly connected to make the solvents and compressed air enter the solvent valve, the triple valve and the spray gun so as to clean the solvent valve, the triple valve and the spray gun, and after cleaning, the solvents flow back to the solvent supply device through a backflow pipe so as to be recycled. The flushing and detecting system of the solvent valve, the triple valve and the spray gun of the automata simulates the working principle of the automata to mix the solvents and the compressed air with certain pressure and further clean the valves and the spray gun with a good cleaning effect, and simultaneously whether a valve core is damaged or shifted or not is judged through observing the movement situation and the leakage condition of the valve core in air control.

The gaseous feed flowing in through line 1 is contacted in contacting zone ZA with a liquid solvent flowing in through line 2. The solvent comprises between 0.001% and 100% by weight of a liquid olefin. Contacting in zone ZA is carried out in the presence of an acid catalyst.

The purified gaseous feed is discharged from zone ZA through line 3. The sulfide-laden solvent is discharged through line 4, then regenerated in unit RE. The regenerated solvent is recycled through lines 7 and 2 to zone ZA.

Method for purifying an alcohol from a fermentation broth comprising adding a heavy solvent, evaporating the alcohol to be purified, and mechanically drawing out of the crystallized salts by heavy solvent flow and scrapping on a falling film evaporator, a wiped film evaporator, a thin film evaporator or a short path evaporator.

The natural gas is successively contacted in column CA with a relatively methanol-rich solvent flowing in through line 4, then with a relatively poor solvent flowing in through line 9. The acid gas-containing solvent recovered through line 3 at the bottom of column CA is expanded through valves V1 and V2 to release acid gases through line 6. A fraction of the expanded solvent is distilled in column CR. The regenerated solvent obtained at the bottom of column CR is sent to the top of column CA through line 9. A second fraction of the expanded solvent is mixed with a solvent drawn off from column CR at an intermediate point between the bottom and the top of this column. This mixture of solvents is sent through line 4 into column CA.

The invention relates to a Soxhlet extractor, particularly relating to a temperature controlled Soxhlet extractor. The temperature controlled Soxhlet extractor comprises an external pipe and an internal pipe which are arranged in a sheathing manner; one end of the external pipe is provided with a temperature control liquid inlet; the other end of the external pipe is provided with a temperature control liquid inlet; a ground connecting end is arranged at the lower part of the external pipe; a branch pipe is arranged between the upper part of the internal pipe and the ground connecting end; a syphon pipe is arranged at the bottom of the internal pipe; a coiled pipe is arranged between the external pipe and the internal pipe; and the pipe body of the coiled pipe is positioned in the interlayer between the external pipe and the internal pipe. In the invention, the internal pipe is sheathed in the external pipe; the temperature control liquid circulates in the interlayer between the external pipe and the internal pipe to lead the internal pipe to keep a certain temperature; the coiled pipe is arranged between the external pipe and the internal pipe; the pipe body of the coiled pipe is arranged in the interlayer between the external pipe and the internal pipe; the condensed and refluxed solvent flows into the internal pipe after passing through the coiled pipe, thus the condensed solvent is controlled at a certain temperature through the temperature control liquid, so as to lead the extracting process to be performed at the required temperature.

The invention relates to the preparation of thin tissue sections for mass spectrometric (MALDI) imaging, and proposes a method wherein a microcrystalline layer of the matrix material is produced on the surface of the thin tissue sections, and soluble analyte molecules are transported orthogonally through the thin tissue section to the matrix layer, without substantial lateral diffusion, by means of a solvent flow with alternating or constant direction, and are then deposited in the matrix layer and, if possible, embedded in the matrix crystals. A solvent flow which alternates in direction can be produced by successive, alternating phases of swelling and drying, brought about by periodic changes to the thin tissue section temperature and/or the partial pressures of the solvents. A continuous solvent flow can be generated by applying the thin tissue section onto a porous support which supplies solvent to the rear surface of the thin tissue section.

The invention relates to a method of cleaning a fluid circuit in an inkjet printer that comprises a print head connected to the fluid circuit through an umbilical (19), and also comprises means (50) of recovering fluid from the print head (1), this method comprising at least sending solvent to said fluid recovery means (50), without making this solvent flow in the umbilical or in the print head.

The invention discloses a simple type test device for a dissolution rate of a flowing pool. The simple type test device comprises the flowing pool, a filter, a multichannel peristaltic pump, a heating pool, a solvent storage bottle and a controller, wherein an upper opening of the flowing pool is in sealing connection with one opening of the filter; the other opening of the filter is communicated with the solvent storage bottle through a hose a; a lower opening of the flowing pool is connected with one end of a hose b; the other end of the hose b is connected with an outlet of the multichannel peristaltic pump; an inlet of the multichannel peristaltic pump is communicated with the solvent storage bottle through a hose c; the flowing pool is arranged in the heating pool. The simple type test device can work in an open or closed form; the heating temperature and the solvent flow rate are controlled; the simple type test device has the characteristics of simple structure, convenience in operation, low cost, and the like and is fit for determining the releasing rate of various drug sustained-release preparations, such as drug release brackets, implants, microspheres, microchips, lipidosome, of institutions of colleges, research institutions, pharmaceutical factory, and the like.

The invention belongs to the field of organic synthesis, and discloses a method for catalytically preparing a drug intermediate chromene pyrimido indazolone derivative, which comprises the following steps: adding an ethanol water solution into a reaction container, adding aromatic aldehyde, 1H-indazole-3-amine and 4-hydroxycoumarin, stirring at room temperature, uniformly mixing, and finally adding an acidic ionic liquid catalyst; heating until the solvent flows back, keeping the temperature until the raw material point disappears, and stopping stirring after the reaction is finished; coolingthe reaction solution to room temperature, grinding the precipitated solid, performing standing, and carrying out suction filtration to obtain filter residues; washing the filter residue with ethanol,and carrying out vacuum drying to obtain a product; and adding reaction raw materials into the filtrate after suction filtration to carry out the next round of reaction. According to the method, thenew acidic ionic liquid catalyst is utilized, and the ethanol aqueous solution is used as a reaction solvent, so that the catalytic reaction efficiency can be effectively improved, the adding amount of the catalyst is reduced, the ethanol aqueous solution can effectively play a role of a recrystallization solvent, and the purification process is simplified.

The invention provides a stop treatment method for an ink-jet recording apparatus, and aims to carry out stop treatment for the ink-jet recording apparatus through a small amount of solvent. During the process from printing state of injecting ink by a nozzle (20) to state of stopping supplying ink to the nozzle (20), solvent is supplied to the nozzle (20) from a solvent supply flow path (45), the solvent flowed through the nozzle (20) is supplied to a recovery flow path (29) to clean the recovery flow path (29), then solvent is supplied to an attraction flow path (56) from the solvent supply flow path (45) to clean the attraction flow path (56), outer gas is supplied to the attraction flow path (56) from the nozzle (20), and after the solvent is changed to air, the solvent is supplied to the attraction flow path (56) again to fine clean. By carrying out residual liquid removing for the attraction flow path (56) and residual liquid removing for the recovery flow path (29) alternatively and repeatedly, liquid in the recovery flow path (29) and the attraction flow path (56) are supplied to an ink container.

An apparatus and process is provided for improved asphaltene separation from heavy hydrocarbon or bitumen with low process complexity through mass transfer using solvent and counter-current flows, with three sections: an upper DAO/solid-asphaltene separation zone, a middle solvent mixing and segregation zone, and a bottom clarification zone. Solvent mixed with heavy hydrocarbon forms a process feed introduced to the process vessel's upper zone and exposed to counter-current solvent removing DAO from solid asphaltene particles in the feed, the particles fall through the middle zone and are mixed with introduced solvent, which introduced solvent segregates DAO-rich solution in the upper zone (for extraction from that zone) from solvent-rich mixtures in the middle mixing and lower clarification zones. Solvent flows and precipitate movement are controlled to optimize mass transfer in process, resulting in high DAO recovery and dry, solid asphaltene product.

The invention relates to a continuous countercurrent extracting tank for extracting traditional Chinese medicines, comprising a tank body, a material pushing spiral conveyor, a driver, a medicinal material inlet, an extracting solution overflowing outlet, a solvent inlet, a decoction dreg slot, a spiral dreg discharging machine and the like, wherein the driver drives the material pushing spiral conveyor to rotate towards one direction and push medicines to move from top to bottom along the spiral conveyor, a solvent flows opposite to the medicinal materials from the bottom, decoction dregs are airtightly discharged out of a chamber by the spiral dreg discharging machine, the outer edge of the material pushing spiral conveyor is provided with a flexible non-return seal, and the volume of the tank body is partitioned into a continuous and long spiral strip-shaped space by the material pushing spiral conveyor, thereby creating conditions for the better uniform fluidity, diffusion and osmosis of an extracting solution and the medicines. The technology in the invention can be used for reforming an out-dated multifunctional extracting tank, the material pushing spiral conveyor and corresponding components are additionally arranged in the inane multifunctional extracting tank so that the multifunctional extracting tank with low yield and high energy consumption is reformed into a continuous countercurrent extracting tank with doubly increased yield and greatly reduced energy consumption, thereby playing a better role for the production of the traditional Chinese medicines after the reformation.

An improved system for removing bitumen from tar sands comprises a pre-treatment system utilizing a vibratory load hopper for classifying and sizing said tar sand particles communicating with a dryer for heating and drying said tar sand particles to a predetermined temperature thereby controlling the moisture content of said tar sands. An extraction system is also included for accepting said tar sands from the dryer comprising a plurality of extraction vessels arranged in series for transporting said tar sands from a first extraction vessel to a final extraction vessel. Furthermore, a solvent system for supplying a predetermined volume of solvent flow through said extraction vessels is employed, whereby solvent is supplied to the last extraction vessel and a solvent and bitumen mixture is withdrawn from the first extraction vessel.