80results about How to "Low Inorganic Salt Content" patented technology

The invention relates to a synthesis method of amino-protecting glycine dipeptidase derivant. The amino-protecting glycine dipeptidase derivant is N-9-Fmoc glycine dipeptidase, N-Boc glycine dipeptidase and N-acetyl glycine dipeptidase. The invention has the technology that glycine dipeptidase is dissolved in 1-20% of inorganic aqueous alkali, and the organic solution of Fmoc-OSu or Boc2O or Ac2Ois dropwise added; reaction is finished within 1-12 hours, the yield of the product Fmoc-Gly-Gly-OH, Boc-Gly-Gly-OH and Ac-Gly-Gly-OH is between 80-95%, and the content of the product is above 99%. The invention has simple technology, easy industrialization and low cost. The product of the invention is the important raw material for synthesizing polypeptide compound.

The invention provides a glufosinate purifying technology including the following steps: (1) adding glufosinate hydrochloride to alcohol R1OH, adding R2NH2 for ammoniation, adjusting the pH to 7.0-14.0, cooling and filtering, removing a solvent from a filtrate to obtain glufosinate ammonium salt and a small amount of organic impurities; (2) dissolving the glufosinate ammonium salt obtained by the steps (1) in an appropriate amount of water, leading in CO2 for neutralizing to the pH of 2.0-5.0, adding a proper amount of alcohol R3OH for precipitation of glufosinate acid, centrifugally filtrating to obtain the glufosinate acid which contains a small amount of ammonium hydrogen carbonate or organic amine carbonates; (3) heating for drying a glufosinate acid filtering cake obtained by the step (2) for decomposition and volatilization of the ammonium hydrogen carbonate or organic amine carbonates to obtain high purity glufosinate acid. The glufosinate purifying technology is simple in steps, the obtained glufosinate is low in inorganic salt content and high in purity, and compared with a traditional technology using epoxy ethane and epoxy propane, the purifying technology using carbon dioxide for separation of glufosinate hydrochloride and HCl is more economical, and high in safety, and has a higher industrialization prospect.

The invention discloses a method for preparing high-purity glufosinate-ammonium by adopting an organic alkali deacidification method, belonging to the technical field of preparation of the glufosinate-ammonium. The method comprises the following steps: by taking glufosinate-ammonium hydrochloride as a raw material, dissolving the glufosinate-ammonium hydrochloride into alcohol R1OH, and thermally filtering out inorganic salt and mechanical impurities; partially concentrating the filtrate, adding organic alkali R2R3R4N for a deacidification reaction, cooling and filtering out glufosinate-ammonium free alkali; adding a crude glufosinate-ammonium free alkali product into the alcohol R1OH, introducing ammonia gas, cooling and filtering to obtain a glufosinate-ammonium product; and recycling an alcohol solvent from crystallization mother liquor of the free alkali, subsequently adding into an inorganic alkaline water solution for neutralization, separating out the organic alkali in the upper layer and directly using the organic alkali in the deacidification reaction. The method disclosed by the invention can be used for effectively removing a small amount of inorganic matters including ammonium chloride, sodium chloride, the mechanical impurities, hydrogen chloride and the like from the glufosinate-ammonium hydrochloride, also can be used for simply and conveniently preparing a high-purity glufosinate-ammonium product without introducing new impurities and organic byproducts and has good industrial application prospects.

The invention discloses a fast propagation method of orchid tissue culture, including culture steps of inducing, reproducing and successive transfer. An inducing medium used for inducing culture is a semi-solid medium taking an improved MS as a basic medium and adding with other ingredients; a medium used for reproducing and successive transfer is a two-phase medium of liquid and solid taking the improved MS as the basic medium and adding with other ingredients. The gentle shaking of a temperature-controlling shaking bed is combined into the invention. The invention realizes the target of highly efficient inducing and reproducing, alleviating browning and effective successive transfer, which is especially suitable for the orchid tissue culture.

The invention discloses a two-in-one combination for shampooing and bathing for children. The combination consists of deionized water, a tender surfactant, a thickener, a neutralizer, a conditioner, an antiseptic substance and essence, wherein the tender surfactant consists of potassium lauryl phosphate, cocamidopropyl hydroxy betaine, coco-glucoside hydroxypropyl sodium sulfonate and ricinoleamidopropyltrimethyl ammonium chloride. The two-in-one combination is a clear and weakly acidic formula, and produced foams are soft, smooth and easy to wash; the two-in-one combination is rich in olive oil and oat and can be used for deeply moistening the skin of a user so as to re-nourish the skin; the two-in-one combination is not oily, has no stimulation, and can be used for effectively moistening the tender skin of a baby. According to the invention, the tenderest and safest surfactant and the tenderest and safest neutralizer are adopted, so that the safety of the two-in-one combination in children products is ensured; the tenderest antiseptic substance is adopted, so that the tenderness and the safety of the product are ensured at the utmost.

The invention discloses a method for two-in and three-out fractional extraction and group separation of europium-rich middle yttrium ore. Two rare-earth feed liquid feeding holes and three rare-earth product solution outlets are formed in a fractional extraction system; chlorinated rare-earth feed liquid of the europium-rich middle yttrium ore is divided into two parts, and is fed to the fractional extraction system from different feeding holes; a third outlet is formed in a water phase of an extraction eluting section, so as to obtain three products; P507 is used as an extracting agent; light rare-earth elements 'La-Nd' products, heavy rare-earth elements 'Ho-Lu+Y' products and medium rare-earth 'Sm-Dy' enriched products are obtained by adopting the method for two-in and three-out fractional extraction and group separation of europium-rich middle yttrium ore Nd/Sm-Dy/Ho. Compared with an existing process for group separation of Nd/Sm-Dy/Ho at three water outlets in the water phase of the P507 extraction eluting section, the method has the advantages that the saponification alkali consumption is reduced by 28%-36%; the acid consumption of the washing acid is reduced by 34%-42%; the separation cost is low; and the green degree is high.

The invention relates to a preparation method of s-(-)-ornidazole disodium phosphate suitable for industrialization. Through the adoption of the scheme, the solvent of methylbenzene in the recrystallization process of S-ornidazole is prevented from being used, and a recrystallization scheme completely without pollution is adopted. Moreover, excess phosphorus oxychloride is removed in advance in the preparation process of the s-(-)-ornidazole disodium phosphate, and thus the content of inorganic salt in a prepared sample is obviously reduced, and the product quality is obviously improved.

The invention relates to a preparative method of anion surfactant of IgeponA series belongs to the technical field of organic compound synthesis. By mixing fatty acyl chloride, fatty acid and hydroxyethyl sodium dithionite, reacting in a normal-pressure reaction apparatus in a heated manner, the product is produced. The invention adopts a few HCI produced in the reaction as the catalyst to speed up the reaction and reduce the irritant property of the product as well as the contact of the organic salt. The odor and the color of the product are thin. With wide application range, the invention is consistent with the basic principle of green chemistry.

The invention provides a multi-split central air conditioning unit condensation water recycling system comprising a condensation water recycling device and pad-fan cooling devices. The condensation water recycling device is connected with an evaporator at the tail end of an air conditioning unit, the pad-fan cooling devices are mounted at air inlets of condensers of the air conditioning unit, the condensation water recycling device is connected with the pad-fan cooling devices through branch water outlet pipes, and a flow regulating valve is arranged on each branch water outlet pipe. Condensation water of the system is collected to serve as a water source of the pad-fan cooling devices, so that dual purposes of air conditioning energy saving and no condensation water emission are achieved; flow control devices are arranged in the condensation water recycling system, so that the condensation water collected from each evaporation unit can be reasonably redistributed and delivered according to working load of each condenser, and utilization rate of energy resources is increased to the greatest extent; water for pad-fan evaporation is mainly from evaporator condensation water of an air conditioning system, the water is quite low in inorganic salt content and close to distilled water, and a pad fan and condenser fins can be prevented from scaling after long-term use.

The invention discloses a process for refining caprolactam. The process comprises the following steps: performing a hydrogenation reaction on a coarse caprolactam aqueous solution which is obtain after an extraction process; then, adsorbing by ion exchange; and further concentrating and distilling to prepare high-purity caprolactam. The process breaks through the convention of sequentially adsorbing and hydrogenating in the prior art, the extracted caprolactam aqueous solution is refined by adopting a process of sequentially hydrogenating and adsorbing by ion exchange, so that the content of impurities and inorganic salt which exist in coarse caprolactam and influence the product quality can be effectively reduced, and the coarse caprolactam can be purified. According to the process, the use cycle of ion exchange resin is prolonged, the number of regeneration times is reduced, massive wastewater generated by ion exchange resin regeneration is avoided, cost and resources can be reduced on the premise of improving the product quality, and pollution can be reduced.

The invention discloses a biochemical system auxiliary device. The biochemical system auxiliary device comprises a power supply controller, insulation tubes, and at least two parallel positive and negative electrodes and/or zero, one or multiple pairs of positive and negative fuel cell electrodes; each electrode comprises a tank body, electrode pore plates vertical to a water inlet direction are inserted in the tank body, at least three rows of electrode pore plates, which are made from piezoelectric/contact alloy, are arranged at a sewage feeding end, and at least twenty rows of electrode pore plates, which are made from rare-earth alloy, are arranged at a sewage discharging end; the fuel cell electrodes are mesh-shaped; the power supply controller is respectively connected with the electrodes and the fuel cell electrode. The biochemical auxiliary device not only can perform a high-performance-cost pre-treatment on sewage, but also can culture targeting bacteria online in a biochemical system; a fuel cell can eliminate charge accumulation toxicity of the biochemical system, so that the biochemical system efficiently and stably runs, the digestion ability to COD is improved by more than two times, and the biochemical effluent index is improved by more than 50%.

Method of using SO*-air mixture to produce alkylphenol sulfonic acid and salts thereof via film sulfonator sulfonated alkylphenol, belongs to sulphonate preparing technology field. The invention uses alkylphenol as raw material, and uses SO[3]-air mixture to sulfonate the raw material via film sulfonator to obtain alkylphenol sulfonic acid, and uses alkaline solution such as NaOH to neutralize the alkylphenol sulfonic acid to obtain alkylphenol sulphonate, the alkylphenol used is a alkylphenol containing one or two C[1]-C[20] straight-chain or branched chain alkyl; the alkylphenol sulfonic acid and salt thereof prepared by the method has high sulphonation rate, low free oil content, low inorganic salt content and producing no spend acid, which is no corrosion to equipments and helpful for environmental protection.

The invention discloses a preparation process of stearate, which is a preparation method for preparing stearate by directly reacting metal oxide or hydroxide with stearic acid. The process has the advantages of short flow, less equipment consumption, low investment, no waste liquid generation, environmental pollution elimination, saving of a large amount of caustic soda, product cost reduction, less process loss of raw materials, contribution to improving the product yield, and the yield of the finished stearate being 98 percent or more calculated by stearic acid. In addition, no other salt isgenerated in the preparation process, and the stearate product has low inorganic salt content, so that the quality of the product is improved, and the technical scheme disclosed by the invention is suitable for popularization and application.

The invention discloses a method for extracting total flavonoids from hibiscus manihot. The method comprises the following steps: (1) extracting, wherein an ethanol solution having the mass concentration of 40-99% is used as an extraction solution and a hibiscus manihot total flavonoid extract is obtained by virtue of microwave extraction; (2) purifying, namely enabling the hibiscus manihot total flavonoid extract to sequentially pass through hollow fiber ultrafiltration membranes having the molecular weight cutoffs of 10000-50000Da and 2000-6000Da and collecting penetration liquid; next, concentrating the penetration liquid by use of a nanofiltration membrane having the molecular weight cutoff of 100-500Da, thereby obtaining a hibiscus manihot total flavonoid concentrated liquid; (3) refining, namely adsorbing the hibiscus manihot concentrated liquid by use of a macroporous adsorption resin, orderly performing water washing and alcohol washing, and performing freeze-drying to obtain the hibiscus manihot total flavonoids. Compared with the prior art, the technology of the method is capable of greatly increasing the hibiscus manihot total flavonoid extraction ratio, and also capable of reducing the content of macromolecular saccharides and protein in the product, reducing the content of metal ions and inorganic salt in the product and improving the product purity.

The invention discloses a biochemical pretreatment technology of high-hardness and high-salinity papermaking wastewater. The biochemical pretreatment technology comprises a physicochemical treatment step, a conveying step, a strong aeration step, a precipitating step and a discharging step, wherein strong aeration is performed through a jet aeration system adopting variable frequency control and a staggered perforated aeration pipe which are arranged inside a strong aeration tank, so that the papermaking wastewater is fully mixed in the strong aeration tank. The biochemical pretreatment technology of the high-hardness and high-salinity papermaking wastewater, provided by the invention, is simple and feasible, and stable in treatment effect; by the biochemical pretreatment technology, the high-hardness and high-salinity papermaking wastewater can be effectively softened to improve water quality and reduce water hardness and inorganic salt content, so that a requirement on continuous and stable operation of a subsequent biochemical system is met; a whole process is clean and pollution-free, environment-friendly and energy-saving, and very low in running energy consumption and running cost.

The invention discloses a benzoic acid-containing wastewater treatment method. Benzoic acid-containing wastewater is treated by a regulating pond, a filter, a decompression and reuse acid steaming system and a Fenton and coagulation system through a biochemical oxidation process and an ozone oxidation process, so that high-index pollutants, such as refractory organic compounds, inorganic salt andchroma in the wastewater are removed efficiently; finally, the COD of the treated effluent is less than or equal to 100 mg/L; the chroma of the effluent is less than or equal to 75; the pH range of the effluent is 6 to 9.

The invention discloses a low-salt culture medium of Lactobacillus rhamnosus comprising a basic culture medium and an optimized culture medium, wherein that basic culture medium comprises yeast peptone, yeast powder, glucose, lactose, isomaltooligosaccharide, L-Malic acid, manganese sulfate, the balance of sterile water, pH 6.50-7.00. The optimized medium consistes of yeast peptone, yeast powder,glucose, lactose, isomaltooligosaccharide, L-Malic acid, citric acid, manganese sulfate, the balance of sterile water, pH 6.50-7.00. The culture medium is suitable for the propagation of Lactobacillusrhamnosus, and the number of viable bacteria in fermentation broth could reach more than 109 CFU/ml.

The invention relates to a purification method for glufosinate-ammonium. The method comprises the following steps that a glufosinate-ammonium hydrochloride crude product is dissolved into a solvent, then, alkaline is added to be subjected to a reaction, the pH value is adjusted to be 7-10, reduced pressure distillation is performed to remove some solvent, then filtering is performed to remove ammonium chloride and other undissolved substances; acid is added into the reaction solution to be subjected to a reaction, the pH value is adjusted to be 1-4.5, and then filtering and drying are performed to obtain glufosinate-ammonium acid; the glufosinate-ammonium acid is dissolved into the solvent, then, ammonia gas is introduced to be subjected to a salt forming reaction, glufosinate-ammonium solid is separated out, and filtering and drying are performed to obtain high-purity glufosinate-ammonium. According to the purification technology, fatty amine hard to remove and high-risk ethylene oxide and epoxypropane are prevented from being used, the steps are simple, the obtained glufosinate-ammonium is low in inorganic salt content and high in purity, yield and safety, water or alcohol is used as the solvent in the technological process, ammonium hydroxide and inorganic base are used for being subjected to a neutral reaction, the glufosinate-ammonium conforms to the environment-friendly and economical principle, and the good industrial prospect is achieved.