30results about How to "Reduced solvent consumption" patented technology

Nozzles and nebulizers that can be adjusted to produce an aerosol with optimum and reproducible quality based on the feedback information obtained using laser imaging techniques are provides. Two laser-based imaging techniques based on particle image velocimetry (PIV) and optical patternation are provided to map and contrast the size and velocity distributions for indirect and direct pneumatic nebulizations in plasma spectrometry. The flow field of droplets is illuminated by two pulses from a thin laser sheet with a known time difference. The scattering of the laser light from droplets is captured by a charge coupled device (CCD), providing two instantaneous images of the particles. Pointwise cross-correlation of the corresponding images yields a two-dimensional (2-D) velocity map of the aerosol velocity field. For droplet size distribution studies, the solution is doped with a fluorescent dye and both laser induced florescence (LIF) and Mie scattering images are captured simultaneously by two CCDs with the same field of view. The ratio of the LIF / Mie images provides relative droplet size information, which is then scaled by a point calibration method via a phase Doppler particle analyzer (PDPA). Two major outcomes are realized for three nebulization systems: 1) a direct injection high efficiency nebulizer (DIHEN); 2) a large-bore DIHEN (LB-DIHEN); and 3) a PFA microflow nebulizer with a PFA Scott-type spray chamber. First, the central region of the aerosol cone from the direct injection nebulizers and the nebulizer-spray chamber arrangement comprise fast (>13 m / s and >8 m / s, respectively) and fine (<10 μm and <5 μm, respectively) droplets as compared to slow (<4 m / s) and large (>25 μm) droplets in the fringes. Second, the spray chamber acts as a momentum separator, rather than a droplet size selector, as it removes droplets having larger sizes or velocities. Smart-tunable nebulizers may utilize the measured momentum as a feedback control for adjusting certain operation properties of the nebulizer, such as operating conditions and / or critical dimensions.

A coating apparatus includes a liquid film forming mechanism configured to form a liquid film of a process liquid for preventing a contaminant derived from a coating liquid from being deposited or left on a back side peripheral portion of a substrate. The liquid film forming mechanism includes a counter face portion facing the back side peripheral portion of the substrate and a process liquid supply portion for supplying the process liquid onto the counter face portion. The coating apparatus further includes a posture regulating mechanism disposed around the substrate holding member and configured to damp a vertical wobble of the peripheral portion of the substrate being rotated. The posture regulating mechanism includes delivery holes arrayed in a rotational direction of the substrate and configured to deliver a gas onto a back side region of the substrate on an inner side of the peripheral portion.

A process for the production of an aerogel material comprises the following steps:a) preparation of a silicon oxide sol in an alcoholic solvent mixture;b) triggering of the gelation of the sol by adding base, whereby a gel is formed, and optionally aging of the gel;c) hydrophobicization of the optionally aged gel;d) removal of the solvent mixture by subcritical drying, whereby the aerogel material is formed.The silicon oxide sol formed in step a) comprises at least one acid-catalytically activatable hydrophobicization agent, wherein the volume fraction of the hydrophobicization agent in the sol is 5 to 60%. The hydrophobicization in step c) is induced as a result of release or addition of at least one hydrophobicization catalyst acting in combination with the hydrophobicization agent.

The present invention provides a monolithic silicone in the form of an aerogel or a xerogel having flexibility and capable of dissolving molecules of a substance. This silicone monolithic body having continuous through passages is synthesized by copolymerizing starting materials of both a bifunctional alkoxysilane and a trifunctional alkoxysilane or tri- or higher functional alkoxysilanes through a sol-gel reaction for forming a Si—O network while causing phase separation.

A pressure-sensitive adhesive composition for use on an optical film, includes a (meth)acryl-based polymer obtained by copolymerization of 30 to 98.9% by weight of an alkyl(meth)acrylate, 1 to 50% by weight of an aromatic ring-containing polymerizable monomer, 0.1 to 20% by weight of a hydroxyl group-containing monomer, and 0 to 4% by weight of a carboxyl group-containing monomer, and a solvent. The (meth)acryl-based polymer has a weight average molecular weight of 300,000 to 1,200,000 as measured by gel permeation chromatography. The content of a solid including the (meth)acryl-based polymer is 20% by weight or more, and the content of the solvent is 80% by weight or less.

An anti-glycation agent includes a Garcinia kola extract or fraction. The compositions including the extract or the fraction are used to inhibit the glycation of proteins, in particular the glycation of skin proteins involved in cutaneous aging. A method for determining the activity of compounds for inhibiting the glycation of cutaneous proteins, in particular for inhibiting the glycation of collagen is also described.

A method for separating a mixture of components by simulated moving bed chromatography: (1) feeding the simulated moving bed such that the eluting power of the liquid phase in the second zone is greater than that of the liquid phase in the third zone, trapping the target component inside the second and the third zone; (2) a solvent for dissolving the mixture to be separated, instead of the feeding solution, is fed into the simulated moving bed through the feeding port, and the eluting power of the liquid phase in the second zone is maintained greater than that of the liquid phase in the third zone, thereby both the pre-impurity and the post-impurity are rinsed off completely, and the target component trapped in the second and the third zone is further purified; and (3) the target component trapped in the simulated moving bed is rinsed off the bed.

A method for representing the quality change process of beef fat during repeated freezing and thawing through a Raman spectrum. The method comprises the steps of (1) setting operating parameters of a laser Raman spectrometer, wherein the operating parameters include the wavelength of exciting light, the laser power and the scanning time; (2) repeatedly freezing and thawing beef, extracting fat in the thawed beef, and then conducting Raman spectrum scanning on the extracted fat; (3) analyzing and processing an obtained original Raman spectrum, so that the quality change process of beef fat during repeated freezing and thawing is represented. The Raman spectrum is used for monitoring the quality change process of beef fat during repeated freezing and thawing, the method is flexible and simple, the analysis speed is high, and the fat quality of beef which is repeatedly frozen and thawed can be represented efficiently and accurately; in addition, analysis solvent consumption is low, and the detection cost is low.

The invention provides a method for preparing high-purity EGCG from a hydrogen-bonded macroporous resin, aiming to solve the problems that toxic chemical reagents are adopted by the existing methods for preparing EGCG so that the safety of medicines can not be guaranteed, and the existing methods for preparing EGCG are not suitable for large-scale production. The method is characterized by comprising the following steps: (1) weighing green tea, adding an appropriate amount of distilled water, heating the green tea to the temperature of 60-80 DEG C, and extracting to obtain green-tea extract; (2) adsorbing the green-tea extract with the hydrogen-bonded macroporous adsorption resin directly, eluting with 10-20% ethanol water to remove impurities, further eluting with 30% ethanol water, and collecting eluate; and (3) concentrating the eluate, freeze-drying, and recrystallizing to obtain the finished product. The macroporous resin can be recycled, the method is simple in technical route, is low in cost and is high in separation efficiency, is environment-friendly and is suitable for the industrial production of EGCG.

The invention discloses a novel color changing valve structure and a work method thereof. The novel color changing valve structure comprises a base, a spindle, a wheel disc and a rotating disc; the spindle is horizontally arranged above the base and penetrates the wheel disc, and the rotating disc is rotatably connected with the spindle; the wheel disc is provided with a plurality of coating input openings, and a coat output opening is formed in the rotating disc; and the process that in the color changing process of a traditional color changing valve, a color changing valve main pipeline needs to be cleaned is omitted. According to a color changing valve, the color changing time can be shortened, and meanwhile solvent consumption can be further saved.

A cleaning system that utilizes an organic cleaning solvent and pressurized fluid solvent is disclosed. The system has no conventional evaporative hot air drying cycle. Instead, the system utilizes the solubility of the organic solvent in pressurized fluid solvent as well as the physical properties of pressurized fluid solvent. After an organic solvent cleaning cycle, the solvent is extracted from the textiles at high speed in a rotating drum in the same way conventional solvents are extracted from textiles in conventional evaporative hot air dry cleaning machines. Instead of proceeding to a conventional drying cycle, the extracted textiles are then immersed in pressurized fluid solvent to extract the residual organic solvent from the textiles. This is possible because the organic solvent is soluble in pressurized fluid solvent. After the textiles are immersed in pressurized fluid solvent, pressurized fluid solvent is pumped from the drum. Finally, the drum is de-pressurized to atmospheric pressure to evaporate any remaining pressurized fluid solvent, yielding clean, solvent free textiles. The organic solvent is preferably selected from terpenes, halohydrocarbons, certain glycol ethers, polyols, ethers, esters of glycol ethers, esters of fatty acids and other long chain carboxylic acids, fatty alcohols and other long-chain alcohols, short-chain alcohols, polar aprotic solvents, siloxanes, hydrofluoroethers, dibasic esters, and aliphatic hydrocarbons solvents or similar solvents or mixtures of such solvents and the pressurized fluid solvent is preferably densified carbon dioxide.

Purification methods of polyamic acid resin and polyimide resin are provided. The purification methods of polyamic acid resin or polyimide resin includes providing a polyamic acid resin or a polyimide resin containing metal ion impurities. Thereafter, a cation exchange resin is used to react with the polyamic acid resin or the polyimide resin in order to remove the metal ion impurities therein, and a water content in the polyamic acid resin or the polyimide resin is removed to purify the polyamic acid resin or polyimide resin.

The present invention provides a chemical experiment extraction device, which comprises: a base with two ends vertically connected to fixed brackets, driving parts arranged on the fixed brackets and used for providing power, and an extraction reaction bottle with two ends rotatably arranged on the two fixed brackets; the driving parts can drive the extraction reaction bottle to rotate; the extraction reaction bottle comprises a first bottle body and a second bottle body, a liquid drainage port is formed in the protruded end part of the first bottle body, a plurality of inclined baffle plates are arranged on the inner wall of the second bottle body, the first bottle body and the second bottle body are combined to form an extraction chamber; and a photoelectric sensor is arranged at the end,close to the corresponding fixed bracket, of the first bottle body, a receiver is arranged on the base, and the receiver is arranged on the lower side of the photoelectric sensor and corresponds to the photoelectric sensor in position. According to the device, the extraction reaction bottle rotates in the vertical direction, so that multi-phase extraction liquid can be fully mixed, liquid mixingcan be further promoted through the inclined baffle plates on the inner wall of the extraction reaction bottle, and the mixing efficiency is improved.

A solvent refining method for isocyanate prepared by the phosgene method and multistage absorbing towers used in same. Solvent to be refined which contains water, iron, and / or phosgene, hydrogen chloride and other materials with color is dealt by the present method and multistage absorbing towers, which can effectively prevent a drying agent from absorbing water and hardening, partial overheating in the tower and generating channeling. Meanwhile, the pressure drop is effectively lowered. In addition, the content of water is ≦50 ppm, the content of iron is ≦5 ppm, the content of phosgene and hydrogen chloride is ≦20 ppm, Pt—Co chroma is ≦20 in the refined solvent. Therefore, the refined solvent can be used as the solvent for preparing isocyanate in the phosgene method and remarkably improve an L color of isocyanate.

Method of dewatering nanocellulose and other water soluble of hydrophilic polymers. The method comprises providing an aqueous suspension formed by nanocellulose in water, said nanocellulose having free hydroxyl groups; mixing the aqueous suspension with an ionic liquid or eutectic solvent which is capable of hydrogen bonding to at least a part of the free hydroxyl groups to form a modified suspension; and evaporating off water from the modified suspension in order to dewater the nanocellulose. With the ionic liquid procedure, solvent exchange with repeated centrifugation steps can be avoided, and solvent consumption and costs reduced, and processing sped up. The nanocellulose stabilized in the water-free environment then allows for access to efficient and thorough water-free chemical modification procedures resulting in highly fibrillated products.

The invention discloses a reversed multiple leaching method for extracting rice bran crude oil. The reversed multiple leaching method comprises the following process steps of (1) a pretreatment stage of the rice bran, comprising the steps of cleaning-pelletizing-drying; (2) a leaching stage comprising a leaching step; and (3) a separation stage of an oil phase and a solvent, comprising an evaporation step. The reversed multiple leaching method is characterized in that a broken rice separation step is arranged in the cleaning step of the pretreatment stage of the rice bran; a dust separation step is carried out on raw material grains after the drying step; and in the leaching stage, a reversed and continuous multiple leaching method is adopted. The reversed and continuous multiple leaching method lies in that a multi-shelf rice bran granular material frame is disposed in a leaching tank; and the rotation direction of the multi-shelf rice bran granular material frame is opposite to a solvent flow direction. In other words, the solvent firstly leaches the rice bran granular material in the last shelf, leaches the rice bran granular material in a plurality of shelves continuously in a reversed sequence and finally leaches the rice bran granular material in the first shelf. The method has the advantages of reducing solvent consumption rate, accelerating leaching speed, increasing oil yield and increasing the quality level of the rice bran crude oil.

The invention relates to an asphalt solubility test method. The method comprises the following steps: 1, taking an asphalt sample, wrapping the asphalt sample by a filter device, and weighing the weights of the asphalt sample and the filter device; 2, soaking the filter device which wraps the asphalt sample in trichloro ethylene, and carrying out standing for the first time to ensure that the trichloro ethylene is in contact with the asphalt sample; 3, controlling the filter device which wraps the asphalt sample to periodically move in the trichloro ethylene, and removing the obtained asphaltdissolution solution; 4, retaking trichloro ethylene, soaking the filter device which wraps the asphalt sample in the trichloro ethylene to carry out periodical movement, carrying out standing for thesecond time, and removing the obtained dissolution solution; and 5, repeating the step 4 until the obtained asphalt solution is clear, obtaining filter devices with different insoluble substances, and obtaining weights of the insoluble substances to calculate solubility of the asphalt sample. The method provided by the invention is capable of effectively improving the working efficiency of the test.

An anti-glycation agent includes a Garcinia kola extract or fraction. The compositions including the extract or the fraction are used to inhibit the glycation of proteins, in particular the glycation of skin proteins involved in cutaneous aging. A method for determining the activity of compounds for inhibiting the glycation of cutaneous proteins, in particular for inhibiting the glycation of collagen is also described.

Purification methods of polyamic acid resin and polyimide resin are provided. The purification methods of polyamic acid resin or polyimide resin includes providing a polyamic acid resin or a polyimide resin containing metal ion impurities. Thereafter, a cation exchange resin is used to react with the polyamic acid resin or the polyimide resin in order to remove the metal ion impurities therein, and a water content in the polyamic acid resin or the polyimide resin is removed to purify the polyamic acid resin or polyimide resin.

The invention relates to process for the continuous production of 4-chloroacetoacetyl chloride, comprising the steps of (a) feeding diketene and chlorine into a thin film reactor and (b) reacting the diketene and chlorine to obtain 4-chloroacetoacetyl chloride. The invention also relates to a process for the production of 4-chloroacetoaceticacid ester, 4-chloroacetoaceticacid amide or 4-chloroacetoaceticacid imide from 4-chloroacetoacetyl chloride obtained according to the inventive process.