64results about How to "Production method safety" patented technology

The invention discloses a polypropylene foaming material. The polypropylene foaming material comprises the following components according to proportioning by weight: 60-99 parts of polypropylene resin; 0.1-10 parts of nucleating agent; 0.1-5 parts of antioxidant; 0-5 parts of colorant; 0-5 parts of lubricant; and 0-20 parts of filling material; and the melt index of the polypropylene resin is 0.1-20 g/10 min, and the foaming process adopts supercritical fluid as the foaming agent, i.e. 0.1-20 parts of supercritical fluid (proportioning by weight). The invention also discloses a production method of the foaming material. Compared with the prior art, the invention has the advantages that the universal polypropylene can be adopted as a base material, no polymer is provided, the cross-linking reaction does not occur, the foaming process is free from environmental pollution, and the production method is safe; the quality of the obtained foaming material is stable, the foaming percentage and the cell density are high, the distribution is uniform, and the invention is suitable for the industrial production at a large scale; and meanwhile, the overall production method is simple, the operation is easy, and the production cost is relatively lower.

The invention discloses a method for preparing fine-grain silicon carbide ceramic through reaction sintering. The method sequentially comprises the following steps: preparing a main material comprising 75-90wt% of silicon carbide micro-powder and 10-15wt% of active carbon powder; adding a dispersant and deionized water to the main material, sequentially adding an aqueous solution of organic matters containing high temperature carbon residue and a water-soluble polymer binder solution, and stirring and mixing above materials in a ball mill to prepare a uniformly-dispersed water-based silicon carbide slip; and sequentially carrying out spray granulation, dry press molding, dewaxing, vehicle working, high temperature siliconising sintering and alkali treatment desilication to obtain the silicon carbide ceramic.

The invention discloses a method for producing organic selenium-enriched rice, wherein the organic selenium-enriched rice is planted according to a normal rice cultivation method. The method is characterized in that the method comprises the steps of: carrying out root dipping treatment to rice seedlings by using selenium-enriched nutrient before transplanting the rice seedlings, transplanting therice seedlings into a big field, planting according to a conventional rice planting method, harvesting organic selenium-enriched paddy, and processing the organic selenium-enriched paddy to obtain the organic selenium-enriched rice. The selenium-enriched nutrient comprises substances with effective application dose, wherein the substances contain selenium and potassium sulfate,. The selenium content of the rice, obtained by the method, is 50-300mug/kg and is improved by 2-10 times in comparison with that of common rice, organic selenium ratio is greater than or equal to 80% and the standard of the organic selenium-enriched rice is achieved.

The invention discloses a regenerated castable manufactured by waste main blast furnace trough castables. The technical proposal is as follows: the regenerated castable comprises the components with mass percents as follows: 55-70 of aggregates with granularity of 1-8mm, 1-10 of aggregates with granularity of 0-1mm, 3-10 of corundum powder with granularity less than or equal to 0.088mm, 3-20 of waste main trough castable powder with granularity less than or equal to 0.088mm, 5-15 of silicon carbide with granularity less than or equal to 1mm, 1-5 of metallic silicon with granularity less than or equal to 1mm, 1-5 of auxiliary bonding agents, 3-7 of alumina or silicon oxide powder with granularity less than or equal to 50mu m and 2.5-7 of calcium aluminate cement. The invention provides a regenerated castable which can be used safely. The waste main trough castables have low fine powder proportion and are safe and reliable. The prepared regenerated castable features good oxidation resistance and strong erosion resistance and can be safely used for production in blast furnace slag troughs and iron runners.

The invention discloses a method for producing an ultra-low-acid ginkgo leaf extract. According to the method, ginkgo leaves or extracts of the common ginkgo leaves are used as raw materials; the ginkgolic acid content in the produced ginkgo leaf extract is less than 1 ppm. The ginkgo leaves are used as the raw materials, and the method comprises the following steps of: extracting by an organic solvent aqueous solution; concentrating an extracted solution, and recycling a solvent; adding water to dilute the solution, standing and sedimentating; centrifugating or filtering to eliminate sedimentations; adsorbing the supernate by large-hole resin; washing by water to remove impurities; desorbing the organic solvent aqueous solution, directly deacidifying gel type hydrogen-bonding adsorbent resin, and washing; and concentrating and drying the flow-out solution and the washed solution to obtain the ultra-low-acid ginkgo leaf extract. The extracts of the common ginkgo leaves are used as the raw materials, and the method comprises the following steps of: dissolving the organic solvent aqueous solution, directly removing ginkgolic acid through the gel type hydrogen-bonding adsorbent resin, washing, and concentrating and drying the flow-out solution and the washed solution to obtain the ultra-low-acid ginkgo leaf extract. According to the method, the process is simple and reliable; the production cost is low; in the production process, toxic organic solvents are not used; and the production process is safe and environment-friendly.

The invention relates to the field of chemical industry and further relates to a production method of an organic phosphorus intermediate, and in particular relates to a method for producing alkyl phosphorus dichloride. The method comprises the following specific step: in the presence of a catalyst, enabling phosphorus trichloride and alkane to react in a tubular reactor under high temperature andhigh pressure, so as to generate the alkyl phosphorus dichloride, wherein the alkane is selected from one or two of methane and ethane and the catalyst is selected from one or two of chloroform and dichloromethane. The method provided by the invention has the advantages of low production cost, great industrial feasibility, measurable and controllable technological conditions, high reaction conversion rate and selectivity, good product quality and the like.

The invention discloses a method for fermentation production of fish sauce through a Halobacteriaceae sp. mixed strain and belongs to the technical field of aquatic product processing. Low-value Bombay duck is fermented through Halobacteriaceae sp. CGMCC 1.10122, Halomicrobium mukohataei CGMCC 1.6192 and Halogranum rubrum CGMCC 1.7738 as mixed starters so that a fish sauce product with high quality and high safety is obtained. The fish sauce has a bright brown-red color, has a delicious fragrance specially belonging to fish sauce, has no putridflavor, has a delicious taste, has no other peculiar smell, is transparent and clear, does not contain foreign matter, has soluble total nitrogen and amino acid nitrogen content reaching or close to the national first order fish sauce product standard, has histamine and nitrite content far below the fish sauce product national standard and greatly improves safety.

The invention provides a producing method of high pure sulfur, which is characterized in filling 3 to 4 weight parts of 99 wt percent sulfur into a pot(4), then putting the pot with 99 wt percent sulfur into a quartz tube(6) which is put into a vacuum sublimation heating furnace(1). Wherein, the heating furnace is internally provided with an insulation layer(2), a heating wire(3), a pot(4), a furnace lining(5), a quartz tube(6) and a vacuum pressure cover(7), whose mounting obliquity Alpha is 30 to 45 degrees; moreover, one end of the quartz tube is sealed with the vacuum pressure cover(7) which is provided with an extraction vacuum hole; once the vacuum is extracted to 1 multiplies by 10-3 to 9 multiplies by 10-3Pa, the heating system of the vacuum sublimation heating furnace is opened, after that, waiting till the temperature of the heating furnace is up to 135 to 145 DEG C, the vacuum sublimation purifying is performed for 3.5 to 4.5 hours; after that, the vacuum and heating system is closed for cooling and discharging, thus, obtaining 2.3 to 3.0 weight parts of 5N sulfur product and having a yield of 75 to 78 percent.

The invention relates to a polymer-modified nano-lecithin composite material and a preparation method thereof, and belongs to the technical field of functional package materials. The polymer-modified nano-lecithin composite material is prepared by taking modified nano-lecithin serving as a plasticizer, adding a cross-linking agent, taking polyethylene or polypropylene as a base material, and performing blow moulding and film forming. A polyethylene composite film with high stability, high barrier property (that is, the oxygen and water vapour barrier properties are improved) and high mechanical properties (that is, the tensile strength and the breaking elongation are remarkably improved) is obtained; moreover, the used plasticizer is the green and natural soybean lecithin, and is harmless to human body health; the prepared thin film can be widely applied to the fields of food package and medicinal package.

The invention discloses a regenerated pouring material manufactured by using waste blast furnace main channel material. Its technical solution: a recycled castable made by using the waste blast furnace main channel material, its components and mass percentage content are: 55-70% of the aggregate with a particle size of 1-8mm, and 55-70% of the aggregate with a particle size of 0-1mm 1-10%; 3-10% for corundum powder with particle size ≤0.088mm, 3-20% for waste main channel powder with particle size ≤0.088mm, 5-15% for silicon carbide with particle size ≤1mm, and 5-15% for silicon carbide with particle size ≤1.0mm 1-5% of metal silicon, 1-5% of auxiliary binder, 3-7% of alumina or silica powder with particle size ≤50μm; 2.5-7% of calcium aluminate cement. The invention provides a recycled castable that can be safely used. The proportion of fine powder of the discarded main ditch castable is not high, which is safe and reliable. The prepared recycled castable has good oxidation resistance and strong corrosion resistance, and can be safely used in blast furnace slag. Ditch and iron ditch production.

The application relates to a method for preparing N-{4-[4-amino-6-(methoxymethyl)-7-(morpholin-4-yl-methyl) pyrrolo [2,1-f] [1,2,4] triazine-5-yl]-2-fluorophenyl}-N'-[2-fluoro-5-(trifluoromethyl) phenyl] urea, and the method comprises the following steps: a) obtaining an intermediate 1, wherein the intermediate 1 is 1-(4-(4-amino-6-(methoxymethyl) pyrrole [1,2-f] [1,2,4] triazine-yl)-2-fluorophenyl)-3-(2-fluoro-5-(trifluoromethyl) phenyl) urea; and b) reacting the intermediate 1 with N-methylenemorpholin-N-chloride to obtain N-{4-[4-amino-6-(methoxymethyl)-7-(morpholin-4-yl-methyl) pyrrolo [2,1-f] [1,2,4] triazine-5-yl]-2-fluorophenyl}-N'-[2-fluoro-5-(trifluoromethyl) phenyl] urea.