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38results about How to "Lighten the color" patented technology

Production method of terpene resin

InactiveCN1631916AMild and even reactionThe reaction temperature fluctuation range is smallAluminium chlorideDistillation
A method for producing terpine resin has the steps follows: turpentine oil, toluene, catalyst aluminium chloride have polymerization in the wash the mixed outcome with hot water for draining the catalyst and waste out, then distil the outcome, recycle toluene and clear the liquid resin and the material which did not join the reaction in the course of distillation, then the toluene is made. The reactor includes enamel glass and inside cooling device which is steelless pipe groups filled with saturated salt solution of indoor temperature in the polymerization. The invention has friendly reaction, small fluctuating range of temperature, stable operation, productiving being raised by 20%, fewer equipments, low cost fir energy and production good economic benefit.
Owner:蓝运泉

Process for fermenting soy sauce through biological enzymolysis

ActiveCN104381964AReduce burnt phenomenonEliminate bitternessFood preparationSaline waterReflux
The invention discloses a process for fermenting soy sauce through biological enzymolysis. The process comprises the following steps: material selection, starter making, salt water preparation, fermented grains making, reflux pouring fermentation, leaching, preparation of product oil through blending and inspection, storage and delivery. The process has the beneficial effects that a false bottom, air holes, a pouring hole and a reflux hole are formed in a fermentation tank, so that either insulated fermentation or natural temperature fermentation can be carried out and the fermentation liquor can be automatically separated from the fermented grains and can undergo reflux pouring; by adopting the reflux pouring fermentation technology used in the fermentation tank and the biological enzymolysis technology, not only the burning phenomenon in the soy sauce fermented grains fermentation process can be effectively reduced, the bitter taste of the soy sauce can be eliminated and the soy sauce has lighter color, strong fragrance and gentle flavor, but also fermentation is thoroughly carried out, the soy sauce fermented grains are not sticky, the product yield is increased and the production cost is reduced; by adopting the advanced equipment, such as an inoculation mixing machine, a disk starter making machine and a sterilizer, the labor intensity is reduced, the production becomes more industrial, automatic and mechanical and the management becomes more scientific.
Owner:TENGZHOU DINGSHENG BREWING

Composition of tanning agent containing modified tara mimosa extract, and bating method without chrome

A tanning agent containing modified Tara tannin extract contains proportionally modified Tara tannin extract, non-Cr metal salt and organic phosphorus salt. Its tanning method features that the bare leather must be immersed in acid before tanned.
Owner:SICHUAN UNIV

Preparation method and application method of granular activated carbon for xylose decoloring

The invention discloses a preparation method and an application method of granular activated carbon for xylose decoloring, which belongs to the field of preparation methods and application methods of activated carbon. The preparation method comprises the following steps: (A) preparing raw materials, namely, weighing phosphoric acid method powder activated carbon made from saw dust, an acrylic emulsion and water according to a ratio of acrylic emulsion to phosphoric acid method powder activated carbon to water being (0.37-0.39):1:1; (B) mixing the raw materials, namely, mixing the weighed raw materials and sufficiently stirring till the granules are uniformly mixed; (C) forming granules, namely, extruding the uniformly mixed raw materials to form granules by using a pelletizing machine at the constant temperature of 90 DEG C, so as to make granules with the particle size of 2-5mm, cooling the granules to be 40-50 DEG C, and drying; (E) separating and cooling. The granular activated carbon prepared by using the method is good in adsorption property, high in strength, acid-alkali resisting, recyclable and reusable, the liquid adsorption amount of unit volume is equivalent to that of other granular activated carbons, and the production environment is improved.
Owner:HUNAN KAIFENG ACTIVE CARBON ENVIRONMENTAL PROTECTION SCI & TECH

Method for decolorization preparation of pale rosin by rosin containing non-decoloring agent

The invention discloses a method used for preparing light-colored rosin by a rosin light-coloring way without adding decoloring agent, which is mainly characterized in that under the condition without the decoloring agent, colored composition in the rosin is decomposed by a thermo-chemical bleaching action, thus achieving the object of light-coloring decoloring of the rosin; namely, under the condition of protective gases such as nitrogen, and the like, the rosin keeps the temperature for a certain time at the temperature of 180-270 DEG C; after the reaction is finished, the rosin is cooled to the temperature below 180DEG C, and the light-colored rosin can be prepared by feeding. The color of the rosin prepared by the method is better than the raw material rosin; when being presented by Gardner color grade, the color of the product is shallower by 0.5-4 color grade than the initial color; the best color is equivalent to national standard special grade which is gained by lightening from national standard class 4; the light-colored rosin is not needed to be distilled in a high vacuum state, has simple and convenient operation, little energy consumption, low expense and high product yield, and has no adding of external additive composition; the gained light-colored rosin product is beneficial for the deep processing and utilization of the rosin, and is applicable to being directly taken as the raw material of various rosin resins.
Owner:湖南松本林业科技股份有限公司

Method for preparing levofloxacin hydrochloride sodium chloride injection

The invention provides a method for preparing levofloxacin hydrochloride sodium chloride injection. By researching a liquid medicine preparation method, medicinal charcoal pretreatment and a terminal sterilization process, product quality is ensured by the aid of technologies of a concentrated solution and diluted solution method, charcoal slurry preparation from medicinal charcoal, water bath sterilization and the like, production is facilitated, obtained finished products have higher stability, so that the storage life of the finished products can be prolonged, and clinical use effects are better.
Owner:HAINAN HOTMED TIANYA PHARMA

Synthetic method for sorbitan octoate emulsifier

The invention discloses a synthetic method for a sorbitan octoate emulsifier. The synthetic method is characterized by being prepared from commercially available D-sorbitol, caprylic acid, a metal tin catalyst, a basic catalyst and a granular magnesium silicate adsorbent, which serve as raw materials, through processes of etherification, etherate refinement, esterification, deacidification, ester refinement and the like. According to the method, the metal tin catalyst is rationally selected and used; a product in the etherification process is subjected to adsorption and refinement treatment by utilizing the granular magnesium silicate adsorbent; unreacted caprylic acid is removed in vacuum at a high temperature; and a final product is subjected to adsorption and refinement treatment by utilizing the granular magnesium silicate adsorbent, so that the sorbitan octoate emulsifier which has the acid value less than 2.0 mgKOH / g, the color luster less than or equal to 100 Hazen, the hydroxyl value equal to 230-300 mgKOH / g and the saponification value equal to 180-210 mgKOH / g, is light in smell, high in transparency, low in fatty acid residue content, difficult in acid backflow and high in stability, and has good solubilizing, emulsification-facilitating, tackifying and anticorrosion-enhancing effects and safe and mild performance is obtained; and the method is suitable for the fields of daily chemicals and cosmetics, and the like.
Owner:ZHANGJIAGANG GREAT CHEM

Scar sun-screening and repairing silicon gel and preparation method thereof

The invention discloses a scar sun-screening and repairing silicon gel and a preparation method thereof. The scar sun-screening and repairing silicon gel is prepared from the following raw materials in percentage by weight: 55-90% of polydimethylsiloxane, 1-20% of a sun-screening agent, 0.2-8% of an antioxidant substance and 2-35% of a solvent. Experiments prove that the scar sun-screening and repairing silicon gel disclosed by the invention is good in sun-screening effect and is capable of inhibiting scar hyperplasia; upon clinical tests, the effective rate of repairing scars after sun exposure is more than 90.00%; the silicon gel is conducive to the protection and repairing of scars under a condition of sun exposure, and the silicon gel is capable of diluting chromatosis and taking a significant effect; and the preparation method disclosed by the invention is simple, short in production cycle, simple in prescription and low in cost.
Owner:TIANJIN JIASHITANG SCI & TECH

Low-alkaline rice tofu and preparation method thereof

The invention discloses low-alkaline rice tofu and a preparation method thereof. The low-alkaline rice tofu is mainly prepared from the following raw materials in parts by weight: 100 parts of long-shaped rice, 0.2 to 0.5 part of CaO, 4 to 13 parts of starches, and 180 to 240 parts of clean water. On the basis of a conventional rice tofu preparation process, the long-shaped rice is used as a raw material; by the adding of the modified starches and / or starches, the physical property of the raw material is improved, and the viscosity and the gel intensity of rice paste are enhanced; therefore, the quality of the rice tofu is improved; meanwhile, the alkaline content is reduced, so that the bitterness of the conventional rice tofu is eliminated, the color is made lighter, and the nutrition loss is alleviated, to meet the food custom and the health concept of modern consumption.
Owner:NANJING AGRICULTURAL UNIVERSITY

Method for regulating the skin and hair color in a post-natal mammal

InactiveUS20050032735A1Increase productionModulates production of pheomelaninCosmetic preparationsHair cosmeticsHair ColorsMammalian cell
A method for regulating the skin and hair color in a post-natal mammalian by preparing a recombinant vector in which an agouti-encoding DNA segment is positioned under the control of a promoter and introducing the recombinant vector into skin cells of the mammalian. The recombinant vector carrying the genes expresses related proteins after they are introduced to most mammalian cells.
Owner:IND TECH RES INST

Self-drainage cigarette filter rod and self-drainage cigarette

The invention discloses a self-drainage cigarette filter rod. A drainage piece in sphere shape is arranged in a filter rod main body and along the radial direction of the filter rod main body, wherein the drainage piece is located on the central position of the filter rod main body, the diameter of the drainage piece is greater than 2mm, and the diameter of the drainage piece is less than the diameter of the filter rod main body. The filter rod main body comprises a tow filer core and wrapping paper, wherein the tow filter core is divided into a first section filter core and a second section filter core along a direction from a smoke inlet to a smoke outlet, the second section filter core is hollow, and the inner cavity of the second section filter core is communicated with the outer end of the second section filter core. When the self-drainage cigarette filter rod is smoked, smoke passing through the first section filter core is forced to turn to the periphery of the filter rod and bypasses the drainage piece when runs into the drainage piece, and due to the facts that the second section filter core is hollow and the central position of the second section filter core is low in suction resistance, the smoke mainly escapes from the central position of the second section filter core after the smoke passes through the drainage piece. Accordingly, not only color and luster of the filter rod after being smoked can be adjusted, and the filter rod is dimmed, but also tar content in main stream smoke has no marked change simultaneously.
Owner:CHINA TOBACCO GUANGDONG IND

Pure traditional Chinese medicine acne-removing cream and preparation method thereof

The invention discloses a pure traditional Chinese medicine acne-removing cream. The cream is prepared from the following medicinal components in parts by mass: 20-40 g of rheum officinale, 10-20 g ofcoptis chinensis, 20-40 g of golden cypress, 20-40 g of angelica dahurica, 2-8 g of realgar, 10-20 g of rhizoma atractylodis, 3-5 g of musk, 10-14 g of borneol, 10-20 g of pericarpium citri reticulatae and 20-40 g of tsuchiuri roots. The preparation method comprises the following steps: weighing desired parts by mass of the above traditional Chinese medicinal materials, grinding the traditional Chinese medicinal materials into wall-broken powder, and conducting sieving with a 140-mesh sieve to form ultrafine powder, thereby obtaining crude medicine powder; and weighing the crude medicine powder and Vaseline according to a ratio of 3: 10 to 1: 3, heating the Vaseline to 60 DEG C, adding the crude medicine powder, and conducting uniform stirring to obtain the acne-removing cream. Accordingto the invention, rheum officinale, coptis chinensis, golden cypress, angelica dahurica, realgar, atractylodes lancea, musk, borneol, pericarpium citri reticulatae and tsuchiuri roots are adopted as aprescription, and Vaseline is adopted as a solvent for the crude medicine powder prepared from traditional Chinese medicinal materials; after the prepared acne-removing cream is used, acne papules become light in color, pain is relieved, papules are reduced, and remarkable effect is obtained; and since the pure traditional Chinese medicinal materials are used in the invention, the acne-removing cream is green and safe and and can practically solve troubles caused by pimples to patients.
Owner:阮安民

Ultra-light-color high-stability hydrogenated terpene-phenol resin and preparation method thereof

The invention discloses a preparation method of ultra-light-color high-stability hydrogenated terpene-phenolic resin, which comprises the following steps: S1, pulverizing terpene-phenolic resin to obtain pulverized terpene-phenolic resin; s2, a solvent, a catalyst, a catalyst carrier and a stabilizer are added into the crushed terpene-phenol resin, then hydrogen is introduced, the hydrogen pressure is 10-30 MPa, the temperature is increased to 210-240 DEG C, a reaction is conducted for 2.5-8 h, and a post-reaction melt is prepared; s3, releasing the pressure, cooling, discharging, and filtering to remove the catalyst, the catalyst carrier and the stabilizer; and S4, distilling the filtered product to remove the solvent, thereby obtaining the ultra-light-color high-stability hydrogenated terpene-phenol resin. The terpene-phenolic resin prepared by the method is light in color and luster, good in stability and weather resistance, simple in preparation step and green, environment-friendly and pollution-free in preparation process.
Owner:广西鼎弘树脂有限公司

Printing method capable of enhancing color lightfast capacity

ActiveCN107433787ALighten the colorEnhance color fastnessOther printing apparatusEngineeringReducer
The invention discloses a printing method capable of enhancing the color lightfast capacity. The method comprises the steps that printing is conducted through ink formed by blending color ink used for color development and reducer used for diluting color of the color ink, when the dilution ratio value is Q1, hue of the ink is target hue, the dilution ratio is the weight percentage, accounted for the ink, of the reducer, and the Q1 is smaller than than 0% and larger than 100%; the printing method is characterized by comprising the steps that 1, the ink with the dilution ratio value that Q2 is smaller than the Q1 is blended; 2, printing is conducted through the ink blended in the step 1 by adopting dots, and the printing technology meets the formula of P=(100%-Q2)+10%, wherein the P represents the dot area coverage which is the percentage, accounted for the mesh area, of the dot area in a mesh in a printing technology adopting the dots, and the P is larger than 0% and smaller than 100%. Accordingly, on the basis that the color with the target hue is printed out, the color lightfast capacity of the printed color can be enhanced.
Owner:广州市恒远彩印有限公司

Phenolic glass fiber prepreg with light color and high quality surface effects and preparation method thereof

The invention relates to a phenolic glass fiber prepreg with light color and high quality surface effects and a preparation method thereof. The prepreg is mainly prepared by the following two steps: I, uniformly dispersing an insoluble inorganic powder mixed filler treated in epoxy resin in advance and other fillers in light-colored basic phenolic resin optimally synthesized according to a formula to prepare a modified phenolic resin solution; II, pre-impregnating a glass fiber fabric in the resin solution to prepare the prepreg. The prepreg has good processability and economical property, can be cured under high, medium and low temperature conditions respectively, is flexible in forming process and lower in required pressure, is suitable for preparing various laminated structures and sandwich structures, has excellent mechanical and FST properties and meets the requirements of CCAR25 and TB / T3237, and in particular, the finished product is light ivory yellow, has obvious shading effects and high surface quality and is easy to popularize and apply in manufacturing interior decorating parts of carriages of high-speed rails, such as railway vehicles, and aircraft cabins.
Owner:AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1

Deodorized and decolorized sea cucumber powder and preparation method thereof

The invention discloses deodorized and decolorized sea cucumber powder and a preparation method thereof, and belongs to the field of aquatic product processing. The method comprises the following steps: (1) removing internal organs and gonads of fresh sea cucumbers, and soaking and washing the inner and outer surfaces of the body walls of the sea cucumbers; (2) draining the body walls of the sea cucumbers, cutting the sea cucumbers into pieces and performing homogenizing; (3) adding water and a compound enzyme into homogenate for enzymolysis, and the compounding ratio of the compound enzyme isthat the ratio of a special enzyme for aquatic products to flavourzyme is (2-8):(2-8)(U); (4) carrying out enzyme deactivation, and performing cooling to room temperature; (5) performing centrifugingand reserving supernatant; (6) performing rotary evaporation and concentration to 1 / 10 of the original volume; (7) storing and freezing a concentrated solution in an ultra-low temperature refrigerator at -80 DEG C; and (8) performing low-temperature freeze drying to obtain a sea cucumber powder. According to the method, no other chemical components are added, so that the time cost and the material cost are reduced, the product safety is improved, and the method is suitable for enterprise production.
Owner:JIANGNAN UNIV

Starch-free mushroom sausage and processing method thereof

The invention belongs to the technical field of edible fungi processing, and particularly relates to starch-free mushroom sausage and a processing method thereof. The starch-free mushroom sausage includes the following components in parts by weight: 20-60 parts of mashed mushrooms, 0-30 parts of mushroom grains, 2-10 parts of soy protein, 0.5-5 parts of carrageenan, 0.5-4 parts of konjac glucomannan, 1-4 parts of dietary fibers, 0.3-3 parts of spices, 10-40 parts of a mushroom cooling bath, 1.5-2.5 parts of table salt, 2-10 parts of vegetable oil, appropriate amount of an antioxidant and appropriate amount of a preservative. According to the invention, the problems of waste water emission during rehydration of dried mushrooms or mushroom stems and additive-free solidification of the soy protein, and the product has special flavor of mushrooms and similar tough and chewy bite feeling, and has the characteristics of enriched dietary fibers, and the realization of no meat or starch additives.
Owner:HENAN XIANGYU FOOD

Composition of tanning agent containing modified tara mimosa extract, and bating method without chrome

A tanning agent containing modified Tara tannin extract contains proportionally modified Tara tannin extract, non-Cr metal salt and organic phosphorus salt. Its tanning method features that the bare leather must be immersed in acid before tanned.
Owner:SICHUAN UNIV

Application of peony PsMYB1 gene in changing color and flower color of plant mottles

The invention discloses application of a peony PsMYB1 gene in changing color and flower color of plant mottles. A constructed PsMYB1 gene silencing vector is transformed into peony petals for expression, after the petals grow for 7 days, the phenotype of PsMYB1 transgenic peony flower spots is observed, and it is found that the color of the flower spots is obviously light, the total anthocyanin content in the flower spots is obviously reduced compared with a wild type, and the expression level of anthocyanin biosynthesis related genes in the flower spots is obviously reduced; and a new peony germplasm with light-color piebald is created. A constructed PsMYB1 gene overexpression vector is transformed into tobacco for expression, after the plant blooms, the petal phenotype of the PsMYB1 transgenic tobacco is observed, and it is found that the color of petals is obviously red, the total anthocyanin content in the petals is obviously increased compared with that of wild type petals, and the expression level of anthocyanin biosynthesis related genes in the petals is obviously increased; and a new tobacco germplasm with bright petals is created.
Owner:YANGZHOU UNIV

Preparation method and application method of granular activated carbon for xylose decolorization

The invention discloses a preparation method and an application method of granular activated carbon for xylose decoloring, which belongs to the field of preparation methods and application methods of activated carbon. The preparation method comprises the following steps: (A) preparing raw materials, namely, weighing phosphoric acid method powder activated carbon made from saw dust, an acrylic emulsion and water according to a ratio of acrylic emulsion to phosphoric acid method powder activated carbon to water being (0.37-0.39):1:1; (B) mixing the raw materials, namely, mixing the weighed raw materials and sufficiently stirring till the granules are uniformly mixed; (C) forming granules, namely, extruding the uniformly mixed raw materials to form granules by using a pelletizing machine at the constant temperature of 90 DEG C, so as to make granules with the particle size of 2-5mm, cooling the granules to be 40-50 DEG C, and drying; (E) separating and cooling. The granular activated carbon prepared by using the method is good in adsorption property, high in strength, acid-alkali resisting, recyclable and reusable, the liquid adsorption amount of unit volume is equivalent to that of other granular activated carbons, and the production environment is improved.
Owner:HUNAN KAIFENG ACTIVE CARBON ENVIRONMENTAL PROTECTION SCI & TECH

Repairing mask cream simulating egg shells

The invention belongs to the technical field of cosmetics, and discloses a repairing mask cream simulating egg shells. The repairing mask cream comprises a preparation A, a preparation B, a preparation C, a preparation D and a preparation E, wherein the preparation A comprises the following components: water, kaolin clay and betaine; the preparation B comprises the following components: an alkanol acrylate cross-linked polymer, propylene glycol, glycerol, butanediol and p-hydroxyacetophenone; the preparation C comprises the component as follows: tetrahydroxypropyl ethylenediamine; the preparation D comprises following components: polydimethylsiloxane, a decamethylcyclopentasiloxane composition, a titanium dioxide composition, polysorbate and sorbitan stearate; and the preparation E comprises following components: a caprylhydroxamic acid composition, a polyurethane composition, a butanediol composition and essence. According to the repairing mask cream, the skin can be strongly cleaned inside and outside and has permeability, and the kaolin clay has the effects of adsorbing grease and dirt and cleaning the skin; and the multiple active ingredients improve the hydration capability of the skin and deeply nourish the skin, so that the effects of fading skin color deposition and brightening the skin color are achieved.
Owner:东晟源研究院(广州)有限公司

Lignin color regulation and control method

The invention discloses a lignin color regulation and control method which comprises the following steps: (1) dispersing dealkalized lignin into a mixed solution of sodium hydroxide and dimethyl sulfate, uniformly stirring, and reacting at normal temperature for 2-5 hours; (2) dissolving the lignin treated in the step (1) in a tetrahydrofuran solution, adding electrolyte, dialyzing at 20-60 DEG C for 2-4 days, and collecting to obtain light-color lignin; and (3) adding metal ions into the light-color lignin, complexing the metal ions with the lignin, and regulating and controlling the color of the light-color lignin. According to the method, the lignin is treated by using the alkaline solution of dimethyl sulfate, so that phenolic hydroxyl groups and LCC (lignin-carbohydrate complex) structures which are contained in the lignin and enable the lignin to present colors can be greatly reduced, and the light color of the lignin is realized. And after different metal ions are combined with the light-colored lignin, the lignin can be adjusted to present different colors through the chemical action of the metal ions and the light-colored lignin.
Owner:SOUTHWEST JIAOTONG UNIV

Processing method of soybean oil

PendingCN114806710AImprovement effectAuxiliary decolorization effect is goodFatty-oils/fats refiningSOYBEAN SEED OILSoybean oil
The invention discloses a processing method of soybean oil, and belongs to the technical field of grease processing. The method comprises the following steps: step 1, preparing soybean crude oil; step 2, performing long-term mixing alkali refining treatment on the crude soybean oil, further performing vacuum drying, adding a filter aid diatomite, and performing reduced-pressure filtration to obtain deacidified soybean oil; step 3, carrying out visible light illumination pretreatment on the deacidified soybean oil; 4, activated clay is added into the deacidified soybean oil subjected to illumination pretreatment for decoloring treatment, and decolored soybean oil is obtained; and step five, deodorizing the decolored soybean oil to obtain the finished product soybean oil. The soybean oil processing method is good in decoloring effect, safe, environmentally friendly, convenient to operate, low in cost, high in refining rate and suitable for soybean oil processing production.
Owner:JIANGNAN UNIV

A kind of soy sauce biological enzymolysis fermentation process

ActiveCN104381964BReduce burnt phenomenonEliminate bitternessFood scienceFlavorReflux
The invention discloses a process for fermenting soy sauce through biological enzymolysis. The process comprises the following steps: material selection, starter making, salt water preparation, fermented grains making, reflux pouring fermentation, leaching, preparation of product oil through blending and inspection, storage and delivery. The process has the beneficial effects that a false bottom, air holes, a pouring hole and a reflux hole are formed in a fermentation tank, so that either insulated fermentation or natural temperature fermentation can be carried out and the fermentation liquor can be automatically separated from the fermented grains and can undergo reflux pouring; by adopting the reflux pouring fermentation technology used in the fermentation tank and the biological enzymolysis technology, not only the burning phenomenon in the soy sauce fermented grains fermentation process can be effectively reduced, the bitter taste of the soy sauce can be eliminated and the soy sauce has lighter color, strong fragrance and gentle flavor, but also fermentation is thoroughly carried out, the soy sauce fermented grains are not sticky, the product yield is increased and the production cost is reduced; by adopting the advanced equipment, such as an inoculation mixing machine, a disk starter making machine and a sterilizer, the labor intensity is reduced, the production becomes more industrial, automatic and mechanical and the management becomes more scientific.
Owner:TENGZHOU DINGSHENG BREWING

Preparation method of pachyman sulfate

The invention discloses a preparation method of pachyman sulfate. The preparation method comprises the following steps of: adding sulfamic acid and an organic solvent in a reaction bottle of a rotary evaporator; preheating to reaction temperature; after fully dissolving the sulfamic acid, adding dried pachyman powder; vacuuming a reaction system; cooling to room temperature after the reaction is finished; adjusting the pH of reaction solution to 9-10 with saturated alkali solution; continuously vacuuming to remove ammonia and repeatedly vacuuming until the reaction solution has no ammonia smell; maintaining the pH value to be over 7 until the pH value does not go down; then adding ethanol; precipitating polysaccharide sulfate; filtering and then dissolving in water again; filtering; placing in an ultrafilter to desalinate and concentrate; and detecting residual quantity of free sulfate radicals in eluent by using saturated barium chloride solution until no white precipitate is produced. According to the preparation method, the sulfation efficiency is greatly increased, polysaccharide molecule degradation and production of sugar ring double ring are suppressed, the color of a product becomes light, and the final quality of the product is obviously improved.
Owner:合肥创新医药技术有限公司
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