16 results about "Drying time" patented technology

The invention discloses a preparation method of amlodipine maleate. The preparation method is applied in the field of pharmaceutical synthesis and uses maleic acid and amlodipine free base as starting raw materials. The preparation method comprises the following steps: adding maleic acid in anhydrous methanol or mother liquor, heating to dissolve, filtering to obtain the methanol solution of maleic acid, and adding the solution in a reaction bottle of a finished product area; adding amlodipine free base in anhydrous methanol to dissolve, stirring to ensure that amlodipine free base is completely dissolved and is transparent, and cooling to obtain the methanol solution of amlodipine free base; slowly adding the methanol solution of amlodipine free base in the obtained methanol solution of maleic acid, keeping the temperature and stirring, cooling, and standing to precipitate crystals; and washing the obtained crystals with absolute alcohol, and drying to obtain the finished product. In the preparation method, the solvent used for forming amlodipine maleate is greatly improved, an anhydrous methanol reaction system is established, the crystal form of the finished product is greatly improved, vacuum filtration is easy, and the yield is increased; and the mother liquor obtained through crystallization and filtration is used as the solvent for dissolving the next batch of solid amlodipine, thus the use amount of anhydrous methanol can be reduced, the utilization rate of the solvent can be increased, the treatment cost of the solvent can be saved, the drying time can be shortened and the operation time can be greatly shortened.

The invention provides a filtering method for suspended matters in water. The method comprises the following steps: clamping a microfiltration membrane with a pair of tweezers, putting the microfiltration membrane into a constant-weight weighing bottle, transferring the microfiltration membrane to a baking oven for drying, then cooling the microfiltration membrane to room temperature, weighing the weight of the microfiltration membrane and carrying out repeated drying, cooling and weighing until the difference between weight values obtained in two weighing is less than 0.2 mg; correctly putting the obtained microfiltration membrane with a constant weight on the filter membrane pallet of a filter membrane filter, covering a matching funnel, fixing the funnel with a clip, wetting the microfiltration membrane with distilled water and carrying out continuous suction filtration; and weighing a sample for suction filtration, continuously washing the sample with distilled water three times, continuing suction filtration to remove a trace amount of moisture, taking the microfiltration membrane out, putting the microfiltration membrane in the original constant-weight weighing bottle, transferring the microfiltration membrane to the baking oven for drying, then transferring the microfiltration membrane into a drier, then cooling the microfiltration membrane to room temperature, weighing the weight of the microfiltration membrane and carrying out repeated drying, cooling and weighing until the difference between weight values obtained in two weighing is less than 0.4 mg. According to the invention, primary drying time is prolonged, drying frequency is reduced, time for drying is shortened, and work efficiency is improved.

The invention relates to novel magnesium oxysulfate cement-based fireproof coating. The fireproof coating is hysteretic in foaming after coating. The surface drying time of the fireproof coating is 80-360 minutes, the fire-resistant time of the fireproof coating is 120-160 minutes, the softening coefficient of the fireproof coating is 0.8-0.9, and the heat conductivity coefficient of the fireproofcoating is 0.08-0.20W/m<2>*K. The fireproof coating comprises, by weight, 30-60 parts of low-grade light calcined magnesium oxide powder, 10-30 parts of light aggregate, 15-30 parts of magnesium sulfate heptahydrate powder, 0.1-1 part of waterproof agent, 0.1-1 part of fiber, 0.1-10 parts of early strength agent, 1-5 parts of active metal foaming agent and the balance water. The novel magnesium oxysulfate cement-based fireproof coating has the advantages that the fireproof coating is low in heat conductivity coefficient, good in thermal stability, capable of preventing foam generated by physical and chemical foaming from breaking during spraying by using the hysteretic foaming technology and uniform in quality; the fireproof coating is good in corrosion resistance, high in safety performance, stable in quality, good in water resistance and high temperature resistance, good in ultraviolet resistance, long in service life and capable of satisfying safety fireproof requirements.

The invention relates to a microwave vibration bed drying method of medium moisture content granular grains. The microwave drying method provided by the invention applies the microwave technology to the drying process of grains by means of heat transfer enhancement by vibration, and dries the materials through steps of sorting and maintaining constant humidity, microwave drying of vibration bed (negative pressure exhaust), aeration-cooling and dehumidifying and the like. Dependence on distribution of the electromagnetic field is weakened by changing the position of materials in the microwave field, so as to avoid local overheating of materials caused by conventional microwave drying and improve the uniformity of absorbing the microwave, therebyimproving the quality of dried product. Compared with the existing drying method, the method provided by the invention has fast heating speed and short drying time, even heating, and high product quality and can well maintain vitamins in food and original color, aroma and taste. The invention thoroughly changes the effect of simply superposing hot air and microwave in spouted bed microwave drying process in prior art, really realizes energy conservation and high efficiency, reduces the cost and is convenient to put on production and automatical control.

The invention relates to a polyvinyl alcohol water-based architectural paint which is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl alcohol, 10-20 parts of benzaldehyde, 5-15 parts of lithopone, 15-25 parts of hypnone, 1-10 parts of zinc oxide, 30-40 parts of paraffin, 50-60 parts of deionized water, 20-30 parts of benzoic acid, 15-25 parts of pigment, 30-40 parts of nitrocellulose, 25-35 parts of sodium hexametaphosphate, 35-45 parts of ethanol, 5-10 parts of plasticizer, 25-35 parts of ethyl acetate, 15-25 parts of talcum powder and 20-30 parts of triethanolamine. The product can not cake after being stored for 6-10 months, and the solid content is 35-45%. The surface drying time is 40-50 minutes, and the solid drying time is 20-22 hours. The paint does not have any abnormity after being immersed in saturated calcium carbonate for 10-20 days. The wiping resistance of the coated film is 2600-2800 times; and the paint can be widely produced and continuously substitute the existing materials.

The invention relates to a novel ink which comprises printing ink, a mixing agent A, a mixing agent B and a brightening agent The parts by weight of the printing ink is 1,500 parts ; the mixing agent A comprises 10-15 parts of viscosity reducing agent and 15-25 parts of varnish; the mixing agent B comprises 5-15 parts of white drying paste and 3-6 parts of fine flour; and the brightening agent is 10-20 parts by weight, wherein the printing ink, the viscosity reducing agent, the varnish, the white drying paste, the fine flour and the brightening agent are common commodities sold in market; and the fine flour is preferably corn flour. The novel ink can print high-grade gold foil paper, aluminum foil paper and various metal paperboards on a common offset machine without the limitation of temperature and printing equipment, has the printing effect which is the same with imported temperature control multicolour printing equipment, high fineness, short drying time and high printing speed and greatly reduces the printing cost.

The invention discloses a crop uniform drying device which comprises a supporting plate. Stand columns are fixedly connected to the two sides of the bottom of the supporting plate. The left side of the top of the supporting plate is fixedly connected with a box body. The top of the box body communicates with a feeding hopper. The center of the bottom of the box body communicates with a dischargingpipe, and the bottom of the discharging pipe penetrates to the bottom of the supporting plate. A first partition plate is arranged in an inner cavity of the box body, and the two sides of the first partition plate are fixedly connected with the two sides of the inner cavity of the box body. The crop uniform drying device is provided with an air cylinder, a transmission rod, a movable sleeve, a fixed rod, a turntable, a sliding rod, a first rotary shaft and screw blades which are used cooperatively, the problem that an existing crop drying device does not have the uniform drying function is solved, the crop uniform drying device has the advantage of uniform drying, the drying time is shortened, the crop is prevented from being affected with damp and mould, storage of the crop is facilitated, property of farmers is prevented from being lost, application is facilitated for the farmers, and the crop uniform drying device is worthy of application and popularization.

The invention discloses a timber drying furnace, which comprises a furnace body, and a flue connected with the burning chamber and the fume outlet of the furnace body. The flue is fixed outside the furnace body, a heat conducting oil interlayer communicated is arranged on the flue and the furnace body, an expansive oil pipe connected with atmosphere is arranged in the heat conducting oil interlayer to be used for a hydraulic pump cycled by the heat conducting oil in the heat conducting oil interlayer; the heat conducting oil is adopted as a medium, the higher drying temperature can be obtained, and the temperature is easy to be controlled, the drying time is greatly saved, because an open mouthed water collecting sump is arranged outside the heat conducting oil interlayer, the water quantity can be increased and reduced according to the demand, thereby controlling the humidity of the hot air blast, and ensuring that the drying timber is free from the crack, the deformation and the discolor, the drying is even, the product quality is improved, when the heat quantity passes through the flue, the heat conducting oil in the flue interlayer can be completely absorbed, thereby fully utilizing the heat quantity, therefore the acceleration speed is improved, the thermal efficiency is high, and the fuel material is saved.

The invention relates to anti-corrosion acrylic acid epoxy resin powder paint for ceramic. The paint comprises the following raw materials: glycidyl methacrylate, polyol, azobisisobutyronitrile, monoacid, di-tert-butyl peroxide, dicyclopentadiene, an initiator, maleic anhydride, epoxy resin, zinc oxide, a flatting agent, 1-o-tolylbiguanide, dodecanedioic acid, 2-mercaptobenzothiazole and titanium dioxide. According to the paint, the melting point is 200-220 DEG C, the density is 135-145g/cm<3>, and the paint has no abnormity after being soaked in 5% hydrochloric acid solution for 20-30d; the glossiness is 140%-150%, and after the artificial accelerated aging is implemented for 500h, the gloss retention rate is 94-98%; the shore hardness is 50-70H, the drying time is 20-30min, the paint cannot bubble or crinkle after being soaked in saturated calcium hydroxide for 15-35d, and the scrubbing resistance times are 1800-2200.

The invention discloses a rubber particle drying device. The rubber particle drying device structurally comprises a rubber particle drying frame, a drying machine body, supporting feet, a rotary tableand a glass door, wherein the supporting feet are fixed at the bottom of the drying machine body, the glass door is arranged outside the drying machine body, the rotary table is arranged inside the drying machine body, and the rubber particle drying frame is connected onto the rotary table. Compared with the prior art, the rubber particle drying device has the beneficial effects that due to the fact that springs are telescopic, the distance between spring rings can be increased or decreased at equal intervals when the springs are telescopic, the distance between drying nets can be changed along with the spring rings, the distance between the drying nets can be adjusted, rubber particles with different specifications can be adapted, the distance between the drying nets can be adjusted according to the amount of dried rubber particles, rapid circulation of hot air is facilitated, the hot air can better act on the rubber particles, the drying efficiency of the rubber particles is improved, the drying time is shortened, and the electric energy is saved.

The invention discloses a rapid shunting drier for a polyester raw material, comprising an outer case and an inner case. A steam heating cavity which is connected with a steam inlet pipe is arranged between the outer case and the inner case; the inner case is internally provided with a raw material cavity which is connected with a vacuumizing pipe; the raw material cavity is internally provided with a temperature detection device; the upper end of the raw material cavity is provided with a polyester raw material outlet while the lower end thereof is provided with a manhole; the inner case is internally provided with a plurality of airways, the two ends of each airway are respectively communicated with the steam heating cavity; the airways are arranged in the inner case according to a certain order; and diversion plates are arranged on the airways. The invention has the advantages of rapid heating speed, shortened drying time, reduced energy consumption, good diversion effect, sufficient mixing of the polyester raw material, little color difference of the polyester raw material, simple structure and convenient use.

The invention provides a denim fabric printing and dyeing process. The technical problems in the conventional printing and dyeing process that the fabric dye-uptake is low, the fabric easily fades due to repeated washing, the printing and dyeing effect is poor, and the like are solved. The denim fabric printing and dyeing process comprises the following steps: a, size mixing and printing, namely mixing printing paste, matching coating printing paste and sulfur dyestuff printing paste, printing a gray fabric through a decorating machine, and drying at the temperature of 90-98 DEG C; b, ageing, ageing the printed gray fabric through an ageing box at the temperature of 102-108 DEG C for 18-30 minutes; c, soaking, namely soaking the aged gray fabric by using sodium bicarbonate, and adding activated carbon; d, washing, namely washing the soaked gray fabric with hot water, soaping, cleaning with clean water, and finally, cleaning with clean water and dewatering; and e, drying, namely drying the washed gray fabric through a drying oven, wherein the drying temperature is 80-90 DEG C, and the drying time is 14-20 minutes, thereby obtaining the finished denim fabric. The denim fabric printing and dyeing process disclosed by the invention has the advantage of excellent printing effect.

The invention discloses a direct-blown drying cylinder cover welding, which is characterized in that it comprises a main body, a drying cover, a steam inlet pipe, an air outlet pipe, a blower, a cooling fin and an exhaust fan, and the bottom of the main body is an inner circle Arc-shaped, a group of cylinders are respectively installed at the left and right ends of the top inside of the main body, and a group of support plates are installed on the front end of each group of cylinders through the cylinder shaft, and the two groups of support plates are welded on the drying cover at the top of the main body. Due to the adoption of the above technical scheme, the present invention has the following beneficial effects: the present invention can directly contact the high-temperature hot air generated in the heat source with the wet paper through the heat dissipation of the blower, so as to speed up the drying efficiency, shorten the drying time, and improve the production efficiency, thereby Reduce steam consumption and reduce production costs.

The invention relates to an adjustable hot air drying device. The device comprises a box, wherein a fan is arranged on the top of the box, so a hot air circulation system can be formed in the box to quicken the drying time and improve the quality of a material after drying. Drying chambers are arranged on the two sides, and a plurality of adjusting devices are arranged, so multiple materials can be dried together, independent temperature adjustment of each drying chamber can be performed, the efficiency is increased, and the investment cost is reduced. A condensation layer can be used for effectively exhausting water vapor produced in the internal space, so the efficiency is increased.