52results about How to "Reduce granulation" patented technology

The invention discloses an oil field profile control and water shutoff method. The method includes injecting polymerizable polymer monomers and initiators into a stratum which needs profile control and water shutoff, and initiating polymerization reaction at the temperature of the stratum, wherein the polymerizable polymer monomers contain at least one of maleic acid, itaconic acid and 2-acrylamide-2- methyl propanesulfonic acid. According to the oil field profile control and water shutoff method, good profile control and water shutoff effects can be acquired.

The invention discloses a method for preparing nylon fibers, which comprises the steps of performing polymerization reaction on raw materials containing 1,5-pentamethylenediamine and adipic acid and then directly spinning them. The present invention also provides a nylon fiber prepared by the aforementioned method. The method of the invention prepares nylon 56 yarn by combining nylon polymerization and melt direct spinning, which reduces production cost, waste gas discharge and environmental pollution. The high-performance nylon fiber prepared by the present invention can be further used to make textile materials such as yarn, woven fabric, knitted fabric or non-woven fabric, and can be applied to the fields of clothing, industry, decorative carpets, etc., and has a wide range of industrial applications. Application prospect.

The invention discloses a filler, synthetic rubber and wet rubber compound integrated production method. A filler is selected from carbon black, white carbon black or a combination of the carbon black and the white carbon black. Compared with traditional and respective independent technologies, the method disclosed in the invention has the advantages of omitting of the post-treatment technologies of the filler and a synthetic rubber, realization of the cycle of sodium carbonate, and full utilization of carbon dioxide and heat generated in a traditional carbon black production technology. So the method can reduce production equipment and simultaneously realize the low carbon and low pollution discharge through the integrated optimization of the process flow in order to reach the recycle purpose.

The invention belongs to the field of polymer molding processing, in particular to a rubber continuous mixing device, which mainly consists of a compounding agent metering supply device, a film metering and conveying device, a machine barrel, a main screw, a planetary screw, a brake ring, a die, and a transmission device The film metering and conveying device is located on both sides of the barrel, and the film is metered and delivered to the feeding port, and the compounding agent metering and supplying device is metered and delivered to the feeding port. In the barrel, it advances with the rotation of the screw, and is cut horizontally by the blade, so that the proportion of the material entering the gap of the planetary screw is basically the same, avoiding the poor dispersion caused by the light weight of the silica when the granular rubber is mixed with the silica. The uniform phenomenon enhances the mixing effect.

The invention relates to a method for preparing FexPO4-containing substances from ferrophosphorus at a low temperature. The ferrophosphorus is mixed with oxidizing substances; then, low-temperature reaction is performed to obtain FexPO4-containing substances; phosphorus sources or iron sources are supplemented according to the ferrophosphorus composition; the influence of impurities in the ferrophosphorus on products is eliminated by physical or chemical measures; the reaction process is enhanced; the fully sealed harm-byproduct-free green and clean production can be realized through regulating and controlling raw materials and process parameters; the generated products can be subjected to concentration granulation or controlled crystallization; the granularity and the appearance are controllable. The method has the advantages that the cheap ferrophosphorus waste slag is converted into high-value FexPO4-containing substances at low temperature; the ferrophosphorus resources are not limited; the influence of impurity elements on products can be eliminated; the granulation treatment can also be performed on products; the appearance and the granularity are controlled; the obtained finished product has high purity and high value; the granularity and the appearance can be easily controlled; the water consumption is low; the energy consumption is low; the preparation method and the process are simple; the resource utilization rate is high; the cost is low; the investment is low; the benefits are good; cleanness and environment protection are realized.

The invention discloses a preparation method of a porous titanium dioxide-silica block. The preparation method comprises respectively adding butyl titanate and ethyl orthosilicate as raw materials into a specific dispersant-containing anhydrous ethanol-deionized water mixed solution, carrying out a water bath reaction process on the butyl titanate solution to obtain butyl titanate semigel, adding the ethyl orthosilicate solution into the semigel, carrying out a stirring reaction process until gelation, directly molding the dried powder and carrying out sintering to obtain the porous titanium dioxide-silica block. The preparation method has the characteristics of simple device, short period and low cost.

The invention discloses a preparation method of a high-water-absorption polymer. The polymer comprises the following components (in parts by weight): 40g to 45g of acrylic acid, 55g to 60g of water, 19.28g to 20.5g of sodium hydroxide, 0.01g to 0.02g of N, N' methylene bis-alkenyl amide, 1g to 2g of 3% potassium persulfate aqueous solution, 0.05g to 0.1g of sorbide glycerinum-laurate and 1g to 2g of 3% potassium persulfate aqueous solution. The preparation method comprises the following steps: preparing the acrylic acid aqueous solution with concentration of 55 to 60 percent; adding a cross-linking agent, a surface active agent and a polymerization initiator into the acrylic acid aqueous solution, blowing nitrogen, sending the solution into a blender at a feed speed of 250g / min, sending the 3% sodium bisulfate aqueous solution into the blender at a feed speed of 6 to 10 g / min, enabling the material mixed by the blender to rapidly flow into a screw squeezing device to be polymerized, controlling the temperature at 103 DEG C, discharging the hydrogel polymer out of the squeezing device, drying by virtue of hot air at 160 DEG C, and crushing to obtain the high-water-absorption polymer. The preparation method is stable in product quality, high in yield, labor-saving and high in efficiency.

The invention relates to an ultrasonic-assisted preparation of spherical praziquantel crystals and a method thereof. Add crude praziquantel into isopropanol solution, stir and dissolve at 50-60°C, prepare praziquantel-isopropanol solution, cool and crystallize by cooling crystallization, add ultrasound at 30-39.5°C, ultrasonic power 10- 100W / mL solution, ultrasonic time is 5-30min, then continue to cool down to crystallize to 0-5°C, keep the temperature for 30min-60min, filter, wash and dry to obtain spherical crystals of praziquantel. The average roundness value is above 0.85, and the angle of repose is below 11°. Spherical praziquantel crystals have the characteristics of high purity, good fluidity, high bulk density, high yield, small crystal particle size and uniform crystal shape, as well as excellent anti-agglomeration performance and bioavailability. The solvent used in the reaction process can be recovered, and the granulation step is omitted by direct forming into spheres, which is a method with great industrial application prospects.

The invention provides a preparation method of an aromatic polyamide fiber and rubber premix master batch. The method comprises the following steps: 1, preparing raw materials: weighing 20-80 parts by mass of liquid rubber, 20-80 parts by mass of aromatic polyamide fibers and a dispersion solvent with the mass 1-2 times the total mass of the liquid rubber and the aromatic polyamide fibers; 2, adding the dispersion solvent weighed in step 1 to the aromatic polyamide fibers to pre-disperse the fibers in order to obtain a fiber solvent premix system; and 3, mixing the fiber solvent premix system obtained in step 2 with the liquid rubber, carrying out gradient heating under a vacuum pumping condition to remove the dispersion solvent and system water, and discharging the obtained material when the read value of a vacuum heating mixer pressure meter is stable and no liquid drops from a solvent condensation port in order to obtain the aromatic polyamide fiber and rubber premix master batch. The method has the advantages of simplicity in operation, low production cost, high efficiency, and effective improvement of the performances and the quality of rubber products produced from the aromatic polyamide fiber and rubber premix master batch.