46results about How to "Pure white color" patented technology

A process for preparing granular bentone includes choosing white bentone, baking or drying in sun, adding sodium carbonate, pulverizing by 100-200 meshes, adding solution of sodium silicate and water, stirring, squeezing, baking and screening. The resultant bentone particles (0.8-4 mm) features high hydroscipicity, strength and caking performance, and high purity.

The invention discloses a preparation method of a white coating agent containing polyvinyl alcohol. The preparation method comprises the following steps: a. mixing polyvinyl alcohol with water in a mass ratio of (1:10)-(1:14), heating the mixture to 85-95 DEG C until polyvinyl alcohol is completely dissolved in water and obtaining polyvinyl alcohol stock solution after cooling; and b. mixing the polyvinyl alcohol stock solution prepared in the step a with the raw white coating agent in a mass ratio of (1:8)-(1:12) and stirring the mixture fully and uniformly. The preparation method has the advantages of time, labor and cost saving and good effect.

The invention discloses a dehydration process of multi-water sodium sulfide during polyphenyl thioether resin synthesis. The dehydration process comprises the following steps of heating and stirring the multi-water sodium sulfide, a catalyst and an NMP (N-Methyl Pyrrolidone) solution in a reaction kettle in the dehydrating stage of the raw material multi-water sodium sulfide, continuously increasing temperature to 150-200 DEG C, and introducing nitrogen. The dehydration process disclosed by the invention can reduce the dewatering time of the multi-water sodium sulfide in the synthetic process of polyphenyl thioether, increase the dehydration efficiency, reduce the energy consumption, prevent the problems of easiness for decomposition and oxidation and the like of NMP (N-Methyl Pyrrolidone) and sodium sulfide at high temperature in air, generate extremely less NMP gas and other foreign gas in the dehydration process, can be used for carrying away the nitrogen through water vapors and is simplified in process flow and favorable to industrialized production and environmental protection.

The invention provides a preparing method of crystal L-calcium lactate. Activated carbon is added to the crystal L-calcium lactate with the concentration ranging from 14.7 g / mL to 40.5 g / mL, and continuous stirring, decoloring and deodorizing are carried out; after filtration, the filtered liquid is moved into a crystallizer, and pH is adjusted to 6-8; poor solvent is added at the constant temperature ranging from 40 DEG C to 60 DEG C, dilution crystallization is carried out, and at the terminal point of dilution, the volume of the added poor solvent is two to eight times of the volume of fermentation liquid; cooling crystallization is carried out, wherein filtering and separating are carried out after the temperature is lowered to 5-20 DEG C, cleaning solvent is used for carrying out cleaning, and L-calcium lactate crystals are obtained after drying is carried out. According to the preparing method, the production cycle is short, and operation is easy; the crystal L-calcium lactate is pure white, crystals are complete, the granularity of the crystals is large, the crystals are distributed evenly, the main granularity is larger than 19.33 microns, and product postprocessing is facilitated; the once-through yield in the crystallizing process reaches 82.0 percent or above, and the method is suitable for large-scale industrial production and has good industrial application prospects.

The invention discloses a novel thermocoagulable polysaccharide (PGHX) producing strain and application thereof, belonging to the technical field of bioengineering. It includes the method for applying the above-mentioned strains to ferment and prepare a novel thermocoagulable polysaccharide (PGHX), the structural characteristics of the fermentation product (PGHX) and its thermocoagulable performance. It specifically relates to the screening method for Agrobacterium, the strain identified as Agrobacterium HX1126 and the preservation number as CGMCC 10943, and a method for producing fermentation products (PGHX) using the microorganism. The microorganism is fermented and cultured for 48 to 90 hours under aerobic conditions, and the yield can reach 24.9 g / L of fermentation broth. The polysaccharide PGHX produced by the bacteria has good thermal coagulation properties. At a concentration of 30 g / L, heated at 100°C for 10 minutes, a thermal gel can be formed. The gel strength is 245-1450 g / cm2. The color of the product is pure white, and the colloid is Translucent and elastic.

The invention relates to a healthcare product combination for clearing and nourishing the throat and a preparation method thereof. The combination comprises the following raw and auxiliary materials in parts by weight: 25-75 parts of rosa roxbughii tratt powder, 100-200 parts of phyllanthus emblica powder, 40-250 parts of sorbitol, 200-900 parts of Isomalt, 1-10 parts of stevioside and 2-18 partsof magnesium stearate. The healthcare product combination for clearing and nourishing the throat, provided by the invention, has slightly astringent taste and sweet aftertaste.

The invention provides a preparation method of low-molecular weight chitosan. The method comprises a step of degrading high-molecular weight chitosan, wherein before degrading the high-molecular weight chitosan, a protecting group is introduced to perform amino protection on chitosan; and the protecting group is one of carbobenzoxy, t-butylcarbonyl, trimethyl silicon ethoxycarbonyl and fluorenylmethyloxycarbonyl. The high-molecular weight chitosan is degraded through the technology combining short-time ultrasonic and hydrogen peroxide chemical degradation. By adopting the method provided by the invention, the prepared low-molecular weight chitosan has relatively high content of active amino, the molecular weight is low, the molecular weight distribution is relatively narrow, the color is pure white, the yield is high, and the application value is greatly increased; by combining ultrasonic pretreatment and chemical oxidation, the degradation efficiency and the energy utilization rate are improved, and the production cost is greatly reduced; and moreover, the technology is simple and convenient to operate, the reaction is easy to control, the reaction conditions are mild, and the method is suitable for large-scale industrial production.