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Technique for preparing potassium sodium dehydroandroandrographolide succinic by using potassium dehydroandrographolide succinate

The invention discloses a process of preparing Dehydroandrographolide Succinate Sodium and Potassium salts with Potassium Dehydroandrograpolide Succinate. The process comprises the steps of: weighing right amount of Potassium Dehydroandrograpolide Succinate, adding absolute ethyl alcohol about 3 to 6 times to make suspension; weighting mole Sodium bicarbonate in equal weight, adding water to dissolve, dripping slowly Sodium bicarbonate solution in potassium dehydroandrograpolide succinate suspension in a water bath at a temperature of between 40 and 60 DEG C, mixing into liquid medicine and defecating, dissolving impurity and filtering, putting on a 0.22 mu m filter membrane, adding absolute ethyl alcohol about 7 to 12 times while mixing, after 10 to 30 minutes of mixing, natural crystallization seeds out after 13 to 18 hours standing in room temperature; filtering and washing 2 to 3 times with right amount of absolute ethyl alcohol; filtering and drying with less pressure. The invention provides a process route of preparing potassium sodium dehydroandroan drographolide succinate for injection with high purity, which is high in process yields, high in product purity, good in solubility, less in impurity and complete in combination of Potassium and Sodium; no obvious toxic and side effect in clinic application, the preparation is more stable compared with the similar and can be prepared into various preparations.
Owner:CHANGCHUN MAILING BIOLOGICAL ENG CO LTD

air purifying humidifier

InactiveCN102297482AImprove air purification rateGood purification and humidification effectLighting and heating apparatusAir conditioning systemsEngineeringWater storage
The invention discloses an air purification humidifier, which comprises a casing and a base, wherein an air purification device, an air purification channel and a motor are arranged in the casing; an air inlet and an air outlet are arranged on the casing; a fan is arranged between the air inlet and the air purification channel; an output shaft of the motor is in driving connection with a power input end of the fan; the air purification device comprises a box body, an air purification water storage cavity, a water delivering mechanism and a water sprinkling mechanism; the box body is detachably connected with the casing; the air purification water storage cavity is arranged at the lower part of the box body; the water delivering mechanism and the water sprinkling mechanism are respectivelyarranged in the air purification channel and are fixedly connected with the box body; a water inlet of the water delivering mechanism is communicated with the air purification water storage cavity; and a water outlet of the water delivering mechanism is communicated with the water sprinkling mechanism. The air purification humidifier also comprises a rotating shaft; the upper part of the rotatingshaft is fixedly connected with a center hole of the fan; and the lower end of the rotating shaft is connected with a power input end of the water delivering mechanism.
Owner:NINGBO ZHENHE ELECTRICAL EQUIP

Yttrium aluminium garnet and yttria double crystal transparent ceramic and method for making same

The invention relates to yttrium aluminum garnet and yttrium oxide double-crystal transparent ceramic as well as the preparation method thereof. The transparent ceramic is characterized in that the YAG and Y2O3 double-crystal transparent ceramic is prepared under the conditions that the weight percentage of yttrium aluminum garnet and yttrium oxide range from 60 percent to 99.99 percent, and the weight percentage of Y2O3 ranges from 40 percent to 39.9 percent. The preparation of the double-crystal transparent ceramic is mainly divided into two stages: firstly, YAG and Y2O3 are mixed with a milling medium, a grinding ball and sintering additives (0.01 to 5.0 wt percent of the sintering additives is further added), the slurry is dried to obtain composite powder, and the composite power is screened; and secondly, the composite powder is subjected to static pressure molding through dry pressing and temperature reduction, and is sintered under no pressure, the sintering temperature is 1,650 DEG C to 1,850 DEG C, and the holding time is 1 hour to 50 hours. The maximum transmission efficiency of the 2mm double-crystal transparent ceramic within the wave band of 400 nm to 1,100 nm can reach more than 81 percent. The preparation method has the advantages of wide raw material sources, simple process and convenient control. The double-crystal transparent ceramic is applicable to the laser and luminescence field by serving as matrix materials.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI

Sandwich-type polycrystalline diamond compact and preparation method thereof and used binding agent

The invention discloses a sandwich-type polycrystalline diamond compact and a preparation method thereof and a used binding agent. The binging agent is made through matching of Co powders, Ni powders, TaC powders and B powders according to a certain proportion. The sandwich-type polycrystalline diamond compact comprises two layers of cemented carbide matrixes and a polycrystalline diamond layer arranged between the two layers of cemented carbide matrixes. The polycrystalline diamond layer and diamond powders are matched in a certain proportion through the binding agent, the polycrystalline diamond layer and the substrate are composited with each other through high-temperature high-pressure sintering, and a superhard composite material with three layers of materials is formed. The cemented carbide layers play the role of a protecting layer, the stress state of the compact when the polycrystalline diamond layer is drilled in is improved, and tipping is avoided. The nanocrystalline metal binding agent can facilitate sintering in high temperature and high pressure, so that the boding density between the diamond (D-D bond) is improved, a good sintering promoting function is achieved, forming of a tough sintering body is facilitated, the impact toughness, the wear-resisting performance and the heat-resisting performance of the sandwich-type polycrystalline diamond compact are increased, and the technological difficulty of high-wearing feature and high impact toughness of the polycrystalline compact is overcome.
Owner:ZHONGNAN DIAMOND CO LTD
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