22 results about "Chemical preparation" patented technology

The application relates to the technical field of chemical preparation, and particularly relates to a liquid monoammonium phosphate and iron phosphate production system. The system comprises a mother liquor treatment device, a pH adjusting tank, a purified phosphoric acid storage tank, a liquid monoammonium phosphate storage tank and an iron phosphate production device; the output end of the mother liquor treatment device is connected with the first input end of the pH adjusting tank, the output end of the purified phosphoric acid storage tank is connected with the second input end of the pH adjusting tank, and the purified phosphoric acid and the mother liquor to be adjusted are injected into the pH adjusting tank; the mixed reaction area of the pH adjusting tank is configured to neutralize the mother liquor to be adjusted and the purified phosphoric acid according to a preset ratio to generate liquid monoammonium phosphate; the input end of the liquid monoammonium phosphate storage tank is connected with the output end of the pH adjusting tank, the output end of the liquid monoammonium phosphate storage tank is connected with the raw material inlet of the iron phosphate production device, and the iron phosphate production device is configured to synthesize iron phosphate by taking the liquid monoammonium phosphate as a raw material. The application has the beneficial effects of simplifying a production process and reducing energy consumption.

The utility model discloses a kind of purification equipment of self-cleaning type sedimentation treatment, belong to chemical preparation technical field, including shunting discharge shell, further including self-cleaning type washing device and multifunctional discharge device, self-cleaning type washing device and multifunctional discharge device for washing purification of sediment are installed on the shunting discharge shell, multifunctional discharge device upper end is connected with self-cleaning type washing device;The multifunctional discharge device includes rotatable discharge component for cooperating self-cleaning type washing device changes discharge path and driving component for providing drive, rotatable discharge component is connected with shunting discharge shell, driving component and self-cleaning type washing device, driving component is connected with shunting discharge shell.By the above-mentioned mode, rotatable discharge component is rotated and adjusted by driving component drive, so that filtered wastewater, sediment and self-cleaning wastewater effectively shunt, improve the purification effect, reduce the influence of sediment impurity on filtration effect.

The present application belongs to the technical field of daily chemical preparation, and particularly relates to a gynecological gel for inhibiting bacteria, regulating microecological balance and tightening vagina and a preparation method thereof. The gynecological gel comprises the following raw materials in mass fractions: 0.5-1 parts of carbomer, 0.04-0.09 parts of sodium hydroxide, 1-3 parts of collagen, 0.01-0.06 parts of sodium hyaluronate, 0.5-1.5 parts of isomaltooligosaccharide, 2-5 parts of propylene glycol, 0.05-0.3 parts of hydroxybenzoic acid methyl ester, 0.02-0.15 parts of hydroxyphenyl ethyl ester, 0.1-1.5 parts of hydrogenated lecithin, 1-6 parts of 1,3-butanediol, 3-5 parts of glycerol, 0.5-1 part of xanthan gum and 70-90 parts of water. The present application uses buckwheat filtrate to prepare collagen, and the active ingredients in the buckwheat filtrate can penetrate the cell membrane of pathogenic bacteria to play an antibacterial role; the collagen can repair the vaginal mucosa barrier and reduce the adhesion and invasion of pathogenic bacteria; therefore, after being compounded with the raw materials such as carbomer, sodium hydroxide, sodium hyaluronate, isomaltooligosaccharide and propylene glycol, the multiple components can synergistically promote the synthesis and repair of collagen fibers and improve the elasticity of tissues.

This invention discloses a chemical preparation method for pharmaceutical-grade dexborneol. The method employs Noyori asymmetric hydrogenation, asymmetric reduction of camphor, and the use of ruthenium as a catalyst. Under the action of phosphine ligands, dexborneol and a small amount of its isomer, isoborneol, are prepared. Then, under the action of trimethylchlorosilane, dexborneol, due to its spatial configuration, can form a silicon-oxygen bond with TMS, while isoborneol cannot. Isoborneol is removed by recrystallization to obtain a silyl ether protected compound of dexborneol. Dexborneol is then prepared under hydrochloric acid conditions and purified by recrystallization to obtain highly purified dexborneol. This route features mild reaction conditions, does not use highly toxic materials, and has a high yield, meeting the requirements for pharmaceutical-grade dexborneol.

The application relates to the technical field of chemical preparation, and discloses a hydrogen peroxide production system, which comprises an organic solvent tank, a solid carrier storage tank, a dosing tank, a stirring kettle and a concentration detection device; the organic solvent tank is mechanically connected with the stirring kettle through a first valve, the solid carrier storage tank is mechanically connected with the stirring kettle through a second valve, the dosing tank is mechanically connected with the stirring kettle through a third valve, the concentration detection device is arranged in the cavity of the stirring kettle, and the concentration detection device is in communication connection with the third valve. The application can accurately control the proportion of various materials, so that the hydrogen peroxide production efficiency is higher, and the concentration is more accurate.

The present application relates to the technical field of chemical preparations, in particular to a method for improving the bioavailability of astaxanthin in phaffia rhodozyma powder and application. The present application uses composite enzymes to pretreat phaffia rhodozyma powder, so that astaxanthin is fully released from the cells, and then specially-made eutectic solvent is used to efficiently extract the pretreated phaffia rhodozyma powder, and the extraction rate can reach more than 90%. The astaxanthin extract prepared by the present application has high antioxidant activity and high bioavailability, and the DPPH free radical scavenging rate can be up to 89.14%, the ABTS free radical scavenging rate can be up to 90.09%, and the bioavailability can be up to 81.41%. In addition, the present application is simple to operate, does not need ultrasonic, microwave and other assisted methods, has low requirements on equipment, can be suitable for industrial large-scale production, provides a feasible scheme for the green and efficient extraction of astaxanthin, and has a wide application prospect in the food, cosmetic and feed industries.

The present application relates to the technical field of vacuum processing, and discloses a vacuum processing equipment, which comprises a vacuum chamber, a loading frame, an evaporation source cover, an evaporation source device and a vacuumizing device; the vacuum chamber is provided with a first exhaust port; the loading frame is rotatably arranged in the vacuum chamber; the evaporation source cover is arranged in the vacuum chamber and located below the loading frame; the inside of the evaporation source cover is communicated with the vacuum chamber through a first opening, and the evaporation source cover is provided with a second exhaust port; at least part of the evaporation source device is arranged in the evaporation source cover; and at least part of the vacuumizing device is arranged outside the vacuum chamber and communicated with the first exhaust port and the second exhaust port. In the present application, the vacuum processing equipment can prepare an ultralow refractive index film meeting the optical performance requirements on the surface of a piece to be processed through a stable and reliable vacuum process, thereby solving the problems of lack of ultralow refractive index solid materials in the existing material system and process complexity, weak adhesion and poor compatibility of the existing chemical preparation method.

The present application relates to the field of high-purity chemical preparation, and discloses a method for preparing high-purity PGMEA and a method for preparing ultra-clean high-purity PGMEA. The method for preparing high-purity PGMEA comprises: (1) sequentially performing dehydration treatment and light component removal treatment on PGMEA crude product to obtain light components and a product after light component removal treatment; (2) performing heavy component removal treatment on the product after light component removal treatment in a heavy component removal tower, and leading a side line product out from a side line of the heavy component removal tower; and (3) performing flash evaporation on the side line product. The high-purity PGMEA product prepared by using the method for preparing high-purity PGMEA has high purity, low water content, low acid value, low ions and low particulate matter, and can meet the use requirements of a preparation solvent of a semiconductor-grade photoresist. The ultra-clean high-purity PGMEA prepared by using the method for preparing ultra-clean high-purity PGMEA can further reduce impurity content, and meet the requirements of subsequent high-end products.

The application discloses a device for preparing electronic-grade sodium hypophosphite dearsenicated salt sodium salt, and belongs to the technical field of electronic chemical preparation. The device realizes the efficient dispersion of phosphine gas into micron-sized bubbles through a membrane dispersion reaction system, realizes the full and stable reaction of the phosphine gas with sodium hypochlorite solution, guarantees the high efficiency and uniformity of the main synthesis reaction from the source, and provides a composition-stable crude product liquid for subsequent continuous purification. Through a bypass arsenic removal unit integrated in a buffer adjustment system, the on-line circulation oxidation-precipitation-separation of arsenic impurities is realized without interrupting the main synthesis process, and the problem of the interruption of the synthesis route caused by the intermittent arsenic removal in the traditional process is solved. By arranging yellow phosphorus storage tanks in parallel and alternately working, the continuous and stable supply of the raw material yellow phosphorus to the phosphine reaction kettle is realized. The device ensures the long-term continuous and stable operation of the synthesis route and the high consistency of product batches, and is particularly suitable for the large-scale continuous production of electronic-grade sodium hypophosphite.

The utility model discloses a kind of pharmaceutical chemical preparation devices, it is related to pharmaceutical chemical field, including reaction kettle shell, servo motor is fixedly installed on reaction kettle shell, transmission shaft structure is fixedly installed in reaction kettle shell and on the output shaft of servo motor, transmission shaft structure is composed of transmission shaft main body, baffle ring, first limit post and second limit post, by setting transmission shaft structure on the output shaft of servo motor, adjustable paddle is set on transmission shaft structure, and adjusting fixed structure, rotating sleeve can drive gear ring rotation, using the meshing transmission of gear ring and rack, drive adjustable paddle moves along slot and accommodating groove, realize the flexible adjustment of adjustable paddle stirring length, adapt to the stirring demand of different volume, viscosity material, so as not to equip multiple sets of stirrer, reduce equipment procurement and storage cost, improve the adaptability of reaction kettle to different pharmaceutical chemical reaction working condition, guarantee material mixing uniformity and reaction effect.

This invention discloses an industrial-scale chemical preparation method for 1,2-di fatty acid glycerides, comprising the following steps: (A) acetone glycerol is protected with a silyl ether protecting agent and purified by crystallization to obtain intermediate 1; (B) intermediate 1 undergoes a depropionyl protecting group reaction and crystallization to obtain intermediate 2; (C) intermediate 2 undergoes an esterification reaction and crystallization and adsorption to obtain intermediate 3; (D) intermediate 3 undergoes a desilyl ether protection reaction and recrystallization to obtain 1,2-di fatty acid glycerides. This invention, through crystallization purification under different conditions, avoids the disadvantages of traditional chemical methods for preparing 1,2-di fatty acid glycerides, such as the need for multiple column chromatography purification steps, low yield, and difficulty in industrialization. This method features mild operating conditions, high purity, and is easily scalable for large-scale industrialization.

The present application relates to the technical field of electronic grade chemical preparation, and discloses an electronic grade hydrogen peroxide preparation process, comprising: performing transient oxidation on hydrogen peroxide raw material liquid containing transition metal impurities, and converting the transition metal impurities into high valence state with inhibited catalytic activity; regulating the pH value of the solution in a short time to lock the high valence state and inhibit the valence state rotation; introducing the treated liquid into a cation exchange resin for deep purification, and ensuring the stability of the process through self-adaptive closed-loop control rules; through the synergistic sequence of chemical regulation and then physical separation, the present application blocks the decomposition path dependent on the valence cycle of metal ions, so that the final product obtains an inherent stability independent of the limit purity, and the quality reliability of the product in a complex application environment is improved.

This invention discloses a method for racemizing dextroimidazole base using ionic liquid catalysis in the field of chemical preparation technology. The dextroimidazole base undergoes a racemic reaction catalyzed by an ionic liquid, followed by post-treatment to obtain tetraimidazole base. The ionic liquid is a basic quaternary ammonium salt ionic liquid. The advantages of this invention are that it uses an ionic liquid as a novel green catalyst, possessing stability, low toxicity, designable structure, high efficiency, and environmental friendliness.

Provided is a continuous process for converting waste plastic into recycle for chemical production. The process comprises selecting waste plastics containing polyethylene and / or polypropylene and preparing a stable blend of a bio feedstock and the selected plastic. The amount of plastic in the blend comprises no more than 20 wt. % of the blend. The blend is passed to a conversion unit. Useful chemicals are recovered, including C3 and C4 olefins and aromatics.

The application is a kind of co-production method based on high-value utilization of whole component of bamboo cane, comprising the following steps: S1, raw material customization supply and pretreatment; S2, flavone extraction and superfine powder preparation; S3, hemicellulose separation and high-carbon powder preparation; S4, multi-path product preparation: path A, material preparation; path B, fuel and chemical preparation; S5, system energy and material circulation. Through the above method, high-purity flavone, bamboo cane superfine residue dry powder, bamboo cane superfine fiber wood dry powder, xylose / syrup, biological resin PLA, bamboo particle raw material, high-purity CO2, dimethyl ether DME, light olefin, benzene, toluene, xylene, green methanol and green aviation kerosene and other products are manufactured. The application realizes the classification and high-value conversion of whole component of bamboo cane, solves the problems of high pretreatment cost and low gasification efficiency, and forms a green circular industrial chain of resources-product-energy.

This invention discloses a heat exchange tube cleaning system and a seawater desalination device, relating to the field of heat exchange tube cleaning technology. The heat exchange tube cleaning system is applied to a seawater desalination device, which includes heat exchange tubes located on each effect evaporator. The heat exchange tube cleaning system includes a liquid collection component, a circulation component, and a chemical preparation component, with the liquid collection component located below the heat exchange tubes. The technical solution provided by this invention achieves precise control of the pH of the cleaning solution by setting up a transmission section that can selectively connect to cleaning solutions with different pH values. For different types of scaling that may occur in the heat exchange tubes of the seawater desalination device, the chemical preparation section connected to the transmission section can be switched to select a cleaning solution with an appropriate pH value for targeted cleaning, avoiding the problem that a single cleaning solution cannot completely remove complex scaling or cause corrosion to the heat exchange tubes.

The application discloses a preparation method of a metal catalyst catalyzed synthesis of 3-boronate aniline, and relates to the field of organic synthesis. The specific reaction steps are as follows: under the condition of inert gas protection, imine (I) and pinacol diboron are used as raw materials, mixed with a certain amount of metal catalyst and ligand, reacted in an organic solvent, and then hydrolyzed with saturated ammonium chloride aqueous solution. After the reaction is completed, the 3-boronate aniline compound shown in structural formula (II) is obtained through the following steps: extracting three times with ethyl acetate, combining the organic phase and removing the solvent under reduced pressure, column chromatography separation and purification. The reaction of the chemical preparation method provided by the application can be carried out under normal pressure and at medium temperature, the operation is simple, the reaction condition is mild, the process condition is stable, the product is easy to purify, the production cost is low, the method is easy to realize in a standard organic synthesis laboratory, the reproducibility is good, and the method is suitable for industrial large-scale production.

The present invention belongs to the technical field of biomass-based high-value chemical preparation. Disclosed is a method for efficiently preparing 5-hydroxymethylfurfural in a temperature-controlled phase separation solvent system. In the present invention, a betaine hydrochloride aqueous solution and an organic solvent are used to construct a temperature-controlled phase separation solvent system, a carbohydrate in the reaction system can be converted into HMF without adding a catalyst, and the reaction time can be shortened by additionally adding a catalyst. During the heating reaction process, the betaine hydrochloride aqueous solution and the organic solvent form a two-phase system; and after the reaction is finished, cooling is performed at room temperature for a period of time, and betaine hydrochloride in the system is precipitated in a crystal form. The present invention can not only catalyze the conversion of raw materials, such as high-concentration fructose (>30 wt%), to prepare high-yield (>85%) 5-hydroxymethylfurfural, but also greatly improves the recovery efficiency of reagents, such as the catalyst and the solvent, and reduces the production cost of 5-hydroxymethylfurfural. In addition, the reaction system is environmentally friendly, has low requirements for devices, and has the capability for large-scale industrial application.

This invention belongs to the field of fluorinated chemical preparation technology, specifically relating to a method for preparing 3,3,3-trifluoropropane from chlorotrifluoromethane. The method includes the following steps: adding zinc powder to a solvent, adding an initiator, heating to 60-80°C and reacting in a sealed environment, introducing chlorotrifluoromethane, and continuing the reaction to obtain a reaction solution containing trifluoromethyl organozinc; adding the reaction solution to a 2-chloroethylene oxide solution at 0-5°C, maintaining the temperature, adjusting the pH to 5-6, quenching, and obtaining crude 3,3,3-trifluoropropane, which is then purified by distillation. The method for preparing 3,3,3-trifluoropropane from chlorotrifluoromethane provided by this invention uses readily available raw materials, has a stable process, high yield, and low cost.

This invention discloses the composition and preparation of an aluminum electrode for a positive temperature coefficient thermistor, belonging to the field of chemical preparation. The aluminum electrode paste is composed of near-spherical aluminum powder, lead-free environmentally friendly glass powder, organic binder, and protective additives. By optimizing the lead-free glass component, the surface protective film of the aluminum powder is prevented from being eroded, thus preventing oxidation and detachment. The aluminum electrode is formed on a barium titanate ceramic substrate through screen printing and sintering at 580–630℃, achieving good ohmic contact with the substrate. The electrode is firmly attached, oxidation-resistant, does not detach, has a small resistance change rate, and exhibits superior corrosion resistance and weather resistance compared to traditional lead-containing aluminum paste. It is suitable for mid-to-high-end PTC thermistors and applications in energy storage and new energy sectors. This invention solves the problems of easy detachment and poor reliability of existing lead-free aluminum pastes, significantly improving component lifespan and stability.

The application discloses a stable allicin water agent and a preparation method and application thereof, and belongs to the technical field of agricultural chemical preparations. The water agent is composed of 2-20% of chemically synthesized allicin, 0.5-5% of a water-soluble colloidal protective agent, 0.1-2% of an antioxidative synergist, 3-10% of a surfactant, 3-8% of an antifreezing agent and the balance of deionized water. The water-soluble colloidal protective agent forms a physical barrier, and the antioxidative synergist provides chemical antioxidative protection, so that a double stable system is constructed, and the light, heat and oxygen stability of the allicin is remarkably improved. The preparation has excellent control effects on fungal diseases such as gray mold and powdery mildew, bacterial diseases such as bacterial wilt, and has rapid contact-killing activity and sustained control capacity on agricultural pests such as chinch bugs, red spiders and aphids, and has a long effective period, is safe to use and simple in preparation process, and has a wide application prospect in the field of green agricultural pest control.

The utility model provides a kind of organoids chemical preparation device, including digestion chamber and cutting part, the opposite entrance and export are provided on the digestion chamber, the entrance of the digestion chamber is provided with the cutting part, the cutting part is opened with discharge port to the side of the export of the digestion chamber, the cutting part is set to be adapted to cut and form preset shape size tissue and discharge through the discharge port, the discharge port side of the cutting part and the export side of the digestion chamber and the inner wall of the digestion chamber form digestion area, the digestion area is set to be adapted to pump into digestive juice. The organoids chemical preparation device, the digestion step of organoids is standardized, mechanized, reduces the human consumption in digestion process, improves the consistency of sample quality, improves the utilization rate of tissue sample, prevents excessive digestion and underdigestion.