42results about How to "The preparation process is simple and economical" patented technology

The invention relates to a petroleum-degrading bactericide and also relates to a preparation method of the petroleum-degrading bactericide. The preparation method of the petroleum-degrading bactericide comprises the following steps: (1) performing enlage cultivation on such bacteria as caulobacter segnis, candida parapsilosis, brachybacterium phenoliresistens, arthrobacter globiformis and sporidiobolus salmonicolor till the concentration of the bacteria is 10<9>-10<10> cfu/g, and uniformly mixing according to the mass ratio of 3: 2: 2: 1: 1 to obtain a mixed culture; (2) fermenting the mixed culture in a liquid fermentation culture medium for 48-60 h; (3) carrying out centrifugal separation to obtain thick strain cells; (4) uniformly mixing the thick strain cells with a 0.9% NaCl solution and a sea mud leachate; (5) adding nutrient substances, and then preserving at 4 DEG C in a sealed manner. The petroleum-degrading bactericide is high in petroleum degradation rate.

The invention belongs to the filed of polymer, particularly relates to a method for preparing agarose cross-linked gel microspheres and provides microspheres which are good in mechanical property, high in heat resistance and pressure resistance and uniform in particle size. An agarose solution serves as an aqueous phase, methylbenzene serves as an oil phase, epoxy chloropropane is adopted for performing cross-linking in the forming process of agarose microspheres, and the agarose gel microspheres good in mechanical property are prepared. The invention further aims at providing the convenient and simple preparation method of the agarose cross-linked gel microspheres.

The invention relates to the technical field of medicaments. The existing process for preparing particle preparations such as a lipid film comprises the step of dissolving a medicament into the oil for injection to form milky microspheres, so the prepared particle preparations have the defects of low medicament-loading amount, poor stability, large using amount of auxiliary materials and large toxic and side effect. The invention provides a method for preparing a freeze-drying particle preparation for injection, which comprises the following steps: firstly, dissolving water-insoluble medicinal powder into a volatile water-soluble organic solvent to form molecular medicinal solution, and then dispersing the molecular medicinal solution into the water for injection to form fluffy soft aggregate mixed suspension; and then adding a small amount of injection-grade auxiliary material such as dispersant and the like into the suspension, and obtaining the freeze-drying particle preparation for injection through a certain preparation process. The particle preparation prepared by the preparation method has the characteristics of small using amount of auxiliary materials, high medicament-loading amount, good stability, simple preparation process and the like. The preparation method of the invention has broad practicability, and basically can meet the preparation requirement of most water-insoluble powdery medicinal particle preparations.

The invention discloses a mullite-high-silica glass complex-phase refractory material for a ceramic burner. The mullite-high-silica glass complex-phase refractory material for the ceramic burner comprises the following the materials in percentage by weight: 40%-50% of mullite-high-silica glass, 10%-15% of andalusite, 5%-10% of alpha-Al2O3, 10%-15% of clay and 15%-20% of cordierite. The refractory material for the ceramic burner has the characteristics of good thermal shock resistance, good high-temperature strength and good resistance to chemical attack.

A slowly-or controllably-releasing semi-solid medicine for treating diabetes B is proportionally prepared from glipizide and slowly-releasing semi-solid skeleton carrier.

A detergent for removing oily dirt is prepared from honey, sesame oil and tea oil for product A, or from Chinese soapberry seed, starch and tea bran for product B. Its advantages are high detergency, no damage to human body and clothes, and no environmental pollution.

The invention belongs to the field of high polymer material sciences, and concretely relates to a preparation method of apolylactic acid fiber composite surface porous film material. The preparation method provided by the invention comprises the steps of dip-coating a fiber into a polylactic acid solution, and air-drying, wherein the mass percent concentration of polylactic acid in the polylacticacid solution is 1 weight percent to 5 weight percent, and the dip-coating time is 50s to 80s. The method provided by the invention is simple and economical in process, convenient and fast to operate,and short in consumed time; the obtained polylactic acid fiber composite surface porous film is a highly ordered and porous material with high stability and large specific surface area, is green without pollution, can be widely applied to the biological medicinessuch as industrial catalysis, biological medicines, fuel cellproton exchange membranes, and high-endisolation techniques as well as thetechnologies such as fuel cellproton exchange membranes, and high-endisolation techniques.

The invention relates to a preparation method of an Erchen drug extract with antitumor-resisting activity and a preparation thereof, and belongs to the technical field of Chinese pharmaceutical manufacturing. The preparation method of the Erchen drug extract comprises the following steps: matching Erchen drug decoction prepared from rhizoma pinelliae, pericarpium citri reticulatae, poria and liquorice root according to ancient herbal formula dosage, adding water for decocting, filtering and carrying out vacuum concentration on the decoction; adding ethanol into the concentrated solution subjected to decoction, dissolving ethanol precipitation and dialyzing; carrying out vacuum concentration on the intra-dialysate and then carrying out vacuum drying to obtain the Erchen drug extract with the antitumor-resisting activity. According to the Erchen drug extract with the antitumor-resisting activity, disclosed by the invention, the extractive yield is high, the polysaccharide content of theextract is higher than 75 percent and the antitumor activity of the Erchen drug extract is better than that of Erchen drug decoction. An excipient is added into the Erchen drug extract to obtain the Erchen drug extract preparation with the antitumor activity; compared with traditional Erchen drug decoction, the preparation prepared by adding the excipient into the Erchen drug extract has the advantages of good anti-tumor effects, convenience in administration, improvement on the compliance of patients and capability of being widely used. The preparation method disclosed by the invention has the advantages of simple and feasible process and suitability for industrialized mass production.

The invention discloses a high-performance flame-retardant cable sheath material and a preparation method thereof. The material comprises the following components in percentage by mass: 25-35% of matrix resin (ethylene-vinyl acetate copolymer (EVA) resin), 55-60% of flame retardant, 0.5-1.5% of coupling agent, 2.5-3.5% of lubricant, 0.1-0.2% of antioxidant and 5-10% of compatilizer. The matrix resin is an ethylene-vinyl acetate copolymer (EVA) resin; the flame retardant comprises Mg(OH)2 and Al(OH)3; the coupling agent is a silane coupling agent; the lubricant comprises silicone and calcium stearate; the antioxidant is B-215; and the compatilizer is maleic anhydride graft. The flame-retardant cable sheath material disclosed by the invention is suitable to be used as an external sheath material of an information transmission cable for rail transportation, and has the advantages of excellent flame-retardant function, ultrahigh oxygen index and higher physical properties; and the oxygen index is up to 40, which is much higher than the flame-retardancy oxygen index of not higher than 30 in industry. The preparation method has the advantages of simple and economical preparation technique, environmental protection and energy saving, and has broad market prospects.

The invention relates to a lead-magnesium-niobate-based ternary piezoelectric ceramic material with low hysteresis and large electrostrictive strain, and a preparation method thereof. The chemical general formula of the lead-magnesium-niobate-based ternary piezoelectric ceramic material is (1-y)((1-x)Pb(Mg<1/3>Nb<2/3>)-xPbTiO<3>)-yBi(Zn<1/2>Ti<1/2>)O<3>, wherein x is greater than or equal to 0.20and smaller than or equal to 0.40, and y is is greater than 0 and smaller than or equal to 0.30.