8 results about "Erythorbic acid" patented technology

The invention discloses a liquid-state stable system and application thereof, a solute in the liquid-state stable system comprises one or more of homocysteine metabolic pathway compounds, a stabilizer contains DTT and ascorbic acid and / or erythorbic acid, and a solvent is a methanol aqueous solution. The stabilizer disclosed by the invention is simple in component, can play a role in stabilizing homocysteine metabolic pathway compounds at the same time, particularly can play a very good role in stabilizing homocysteine metabolic pathway compounds with different stabilizer requirements at the same time, and effectively and greatly reduces the degradation rate of each compound. When the liquid stable system is applied to preparation of a homocysteine metabolic pathway compound detection kit, the liquid stable system can be used as a calibration product, a quality control product, an internal standard working solution and other components, has good stability, is beneficial to prolonging the shelf life of a kit product and reducing the storage cost, and is suitable for industrial production. When the kit is used for quantitative detection of homocysteine metabolic pathway compounds, the detection result is more reliable, and more valuable data support is provided for research and application in related fields.

The application discloses polylactic acid-polycaprolactone degradable woven bag non-woven fabric and a preparation method thereof. The non-woven fabric is prepared from the following components: polylactic acid, polycaprolactone, sodium lauryl sulfate, dopamine-modified nano-titanium dioxide composite, a compound system of citric acid and epoxy soybean oil, a combination of sodium carboxymethyl cellulose and calcium dodecyl phosphate, and a combination of montmorillonite and D-isoascorbic acid palmitate. The above system forms a multi-level degradation regulation network structure with surface interface regulation, intermediate layer microstructure regulation and nano functional particle synergistic catalysis, and realizes controllable regulation of the degradation rate of polylactic acid-polycaprolactone blended materials. A preparation method is used to prepare the non-woven fabric. The application has the following beneficial effects: the problems of the prior art, such as difficult accurate regulation of the degradation rate of polylactic acid-polycaprolactone blended materials, poor environmental adaptability and limited application scenarios, are solved.

This invention discloses the preparation of furan[3,4-d]-1,3,2-dioxathiol-4(3aH)-one, dihydro-,2-oxide, comprising the following steps: 1. Dissolving D-isoascorbic acid in water and adding sodium carbonate; 2. Adding 40 μL of 50% H2O2 aqueous solution dropwise. o C. Stir the reaction, then heat to 80°C. o C. Stir the reaction, filter while hot, wash with water to obtain a colorless and clear filtrate; 2. Quench the reaction with hydrochloric acid dropwise to acidity, evaporate to dryness under high vacuum to obtain a white solid; reflux with ethyl acetate, filter, evaporate the filtrate by rotary evaporation to obtain a crude intermediate, which is then processed to obtain a white needle-like crystalline intermediate; 3. Dissolve the white needle-like crystalline intermediate in acetonitrile, add thionyl chloride dropwise, and stir the reaction; 4. Pour the reaction solution into ice water, extract with dichloromethane, dry, filter, and evaporate by rotary evaporation to obtain a yellow solid crude product; further processing yields the product. The advantages of this invention are: simple process route, mild and easy-to-control reaction, low purification difficulty, few by-products, and high yield and purity.

The present application provides a curry sauce, comprising: 85-90 parts by mass of soybean oil, 35-40 parts by mass of chopped chili pepper, 10-15 parts by mass of dehydrated coriander, 8-10 parts by mass of edible salt, 8-10 parts by mass of white granulated sugar, 5-12 parts by mass of monosodium glutamate, 4-10 parts by mass of raw garlic, 2-4 parts by mass of erythritol, 2-4 parts by mass of raw ginger, 1.5-2.0 parts by mass of oyster sauce, 1.5-2.5 parts by mass of chicken essence, 0.4-0.6 parts by mass of yeast extract, 0.6-0.8 parts by mass of capsaicin, and 0.1-0.3 parts by mass of capsicum red pigment. The two-step process of "cold treatment plus color protection agent and synergistic rehydration, low-temperature frying and fresh-keeping" is adopted for the dehydrated coriander, and the rehydration link uses a compound solution of erythritol, concentrated lemon juice and erythorbic acid to achieve the four effects of color protection, crispness preservation, taste retention and shelf life extension. By controlling the process parameters and taking advantage of the compound components, the unstable quality and short shelf life of the rehydrated coriander are solved.

The invention relates to the technical field of non-ferrous metal beneficiation, in particular to a copper-molybdenum bulk concentrate flotation separation inhibitor, a preparation method thereof and a beneficiation method for copper-molybdenum bulk concentrate separation. The inhibitor comprises D-erythorbic acid and sodium ethylene diamine tetramethylene phosphonate. D-erythorbic acid is used as a strong reducing agent, elemental sulfur and high-valence metal ions generated on the surface of the chalcopyrite due to oxidation or adsorption of the collecting agent can be rapidly reduced, a hydrophobic collecting agent adsorption layer is destroyed, and efficient'reagent removal 'is achieved. Sodium ethylenediamine tetramethylene phosphonate is a polydentate organic phosphonic acid chelating agent, and four phosphonic acid groups of the sodium ethylenediamine tetramethylene phosphonate and Cu < + > / Cu < 2 + > exposed on the surface of the chalcopyrite can form an extremely stable multi-core chelate. The firm adsorption layer enables hydrophilic phosphonic acid groups to face ore pulp, so that the surface of the chalcopyrite is strongly hydrophilic and is deeply inhibited, the two agents do not adsorb molybdenite at all, and under the cooperation of the two agents and under the condition that the using amount of sodium sulfide is low, copper sulfide minerals are effectively inhibited, and efficient separation of copper and molybdenum is achieved.

This invention discloses a microemulsion-type stainless steel cleaning agent and its preparation method, relating to the fields of metal surface treatment and fine chemical technology. The cleaning agent is prepared from the following raw materials in weight percentages: 5%~10% complex organic acid, 1%~3% gluconolactone, 3%~6% microemulsifying surfactant, 2%~4% solubilizer, 0.5%~1.5% corrosion inhibitor, 1%~2.5% penetrant, 1%~3% chelating-reducing bifunctional auxiliaries, 0.3%~1.5% pH adjuster, with the balance being deionized water. The complex organic acid is a mixture of citric acid and tartaric acid, malic acid, or glycolic acid; the chelating-reducing bifunctional auxiliaries are ascorbic acid or isoascorbic acid. This cleaning agent is a bicontinuous medium-phase microemulsion with a pH of 6.5~7.5. Through synergistic formulation and a unique preparation process, the cleaning agent of this invention achieves gentle, efficient, and environmentally friendly cleaning on stainless steel surfaces, effectively removing oil, oxides, and scale without corrosion or residue.

The invention relates to the technical field of can processing, in particular to a method for improving pulp browning of canned kiwi fruits. The preparation method comprises the following steps: S1, cleaning, peeling and dicing kiwi fruits, soaking the kiwi fruits in a color protection solution, blanching the kiwi fruits, and cooling the kiwi fruits; s2, soaking the cooled blocky kiwi fruits in a D-erythorbic acid solution, and sequentially canning, injecting sweet water, sealing, sterilizing and cooling after soaking is finished; the color protection liquid in the step S1 comprises the following components: D-erythorbic acid, citric acid, calcium chloride and psicose. According to the method provided by the invention, browning of the kiwi fruit pulp can be remarkably inhibited, the fresh green color and complete form of the pulp can be kept, nutrition loss is reduced, the process is simple, the flow is standard, complex equipment is not needed, the method is suitable for industrial large-scale production, and the prepared can is long in shelf life, excellent in taste, safe and healthy.

The present application relates to water treatment agent preparation technical field, disclose a kind of river and lake water spongy target killing composite microbial growth-promoting agent preparation method, the method includes: preparation includes sodium percarbonate, L-glutamic acid-N,N-diacetic acid tetrasodium and polyaspartic acid granule A;Preparation includes humic acid sodium, adipic acid, sodium erythorbic acid and ferric citrate granule B;Granule A and granule B are jointly put into mixing machine and mixed uniformly, after discharging, vacuum sealing packaging is carried out.The present application realizes the physical isolation of oxidizing agent and reducing agent by extruding granulation respectively, to avoid the early failure of agent during storage period.After input into water body, the difference in physical strength of two types of granules is used to realize time sequence disintegration, granule A disintegrates first to build alkaline de-crosslinking environment to strip water spongy defense layer, and granule B disintegrates subsequently to make microenvironment drift to weak acidity, trigger fenton-like reaction to release hydroxyl radical to complete targeted killing, and oxygen release and carbon and nitrogen source dissolution can promote water bottom micro-ecosystem reconstruction.