34results about How to "No coalescence" patented technology

The invention relates to a high-temperature and high-salt-resistant nano-emulsion viscosity reducer used for heavy oil exploitation and transportation. It uses surfactants, and at the same time adds alkaline additives and nano additives to significantly improve the effect of emulsification and viscosity reduction. The viscosity reducer is composed of non-ionic surfactant, anionic surfactant, modified nano additive, NaOH, accelerator and water. The preparation method is: add 5-7% of OP-10, 2-5% of accelerator, 0.5-2% of modified nano additives at normal temperature and pressure, and stir evenly; then add anionic surfactant 30-45 %, add O1~3% flatly; finally add NaOH 20~30% and water 20~40%, and then stir continuously at a speed of 60~120r / min for 60~90min to obtain this nanoemulsion viscosity reducer product. The viscosity reducer system has good stability and will not coalesce during storage; the formed oil-in-water particles are smaller and more uniform, which improves the seepage capacity; it can greatly reduce interfacial tension and improve oil displacement efficiency, and can be used for heavy oil recovery and delivery fields.

The invention relates to a method for producing crystals of cefadroxil monohydrate, comprising the following steps: adding an N, N-dimethyl formamide solvent compound of cefadroxil to a mixed solvent of N, N-dimethyl formamide and water, wherein the mass ratio of the cefadroxil solvent compound to the mixed solvent is 1:1-1:2, stirring to obtain a suspending liquid, and keeping the temperature at 15-30 DGE C and the pH value of the solution at 6.0-7.5 during feeding; after the cefadroxil solvent compound is totally changed into the cefadroxil monohydrate, reducing the pH value of the suspending liquid to 4.5-5.0 within 1-20 minutes, keeping the temperature at 10-18 DEGC, and stirring for crystal cultivation for 10-90 minutes; and filtering, washing and drying after crystal cultivation is finished to obtain a product, the square platy crystal-form cefadroxil monohydrate. The square platy crystal-form cefadroxil monohydrate obtained by the method has uniform particle size distribution, does not generate coalescence, and is applicable to industrial production.

The invention relates to an ultrasonic-assisted coenzyme Q10 crystallizing method which comprises following steps: adding coenzyme Q10 with a purity being 90-95% to an organic solvent, wherein a mass ratio of the raw material to the organic solvent is 20-40:100; stirring the mixture and increasing the temperature to 50-60 DEG C for completely dissolving the coenzyme Q10 to form a uniform solution; performing a cooling crystallization process; decreasing the temperature of the solution to 36-40 DEG C with the ultrasonic-assisted crystallization being carried out for 5-20 min; decreasing the temperature of the solution to 13-20 DEG C; and performing filtration, a washing operation and a drying operating to obtain a coenzyme Q10 crystal product. The method is short in crystallization time. The coenzyme Q10 crystal product has a large granularity of about 70 [mu]m and is uniform in distribution. The solution is easy to filter and dry, is good in flowability and is free of coalescence. A single-way crystallization yield is higher than 90%. The purity of the coenzyme Q10 crystal product is higher than 99.0%. The method is convenient to operate, is low in cost, is less in energy consumption, is free of generation of harmful wastes and is suitable for industrial production.

The present invention relates to a method for manufacturing oil gel capsules and a method for manufacturing a contact part for a vehicle, including the oil gel capsules. The present disclosure relates to manufacturing the oil gel capsules and adding the oil gel capsules to an overlay layer of the contact part for the vehicle. The present disclosure may provide a method for manufacturing the oil gel capsules and the method for manufacturing the contact part for the vehicle, including the oil gel capsules. The oil gels in the oil gel capsules manufactured by the present disclosure may respond to the temperature environment of the contact part for the vehicle, and an aggregation phenomenon of gelators or an aggregation phenomenon of surfactants may not occur even after an oil is released. Therefore, as oil gel capsules are added to an overlay layer, the present disclosure may improve low friction characteristics and seizure resistance characteristics of a contact part for a vehicle without any side effects caused by the above-described aggregation phenomenon.

The invention relates to a high-efficiency instant multi-component copolymer dispersion and a preparation method thereof. The dispersion liquid comprises the following components in weight percent: multi-polymer copolymer fine powder: 45-55%; rheological agent: 1.5-3%; rheological additive: 0.5%-1%; wetting agent : 0.5-1%; stabilizer: 0.5-2%; activator: 0.5-1%; emulsifier: 1.5-4%; white oil: 34-50%; the method is: grinding multi-component copolymer particles , to obtain a multi-component copolymer fine powder; add a wetting agent and a stabilizer to the multi-component copolymer fine powder for surface treatment to obtain a pre-treated fine powder; white oil, pre-treated fine powder, rheological agent, rheological additive, The activator and emulsifier are mixed and then activated to obtain the dispersion. The dispersion liquid of the present invention has high solid content and is more stable, the delamination rate is less than 2% within 6 months, the dispersion liquid has low apparent viscosity, good fluidity, and no precipitation after long-term storage.

The present invention relates to an apparatus for preparing cremated body crystalline grain which manufactures the collected bone powder into crystallized bones in the form of small bells. This crystallized bone manufacturing machine includes: a bone powder hopper and a heating furnace which is supported on one side of the housing by a supporting shaft, the supporting shaft is provided with a rotating handle on one end and a heating mechanism is disposed to surround the heating furnace as a heat source. The apparatus further includes: a spindle plate provided on the lower side of a discharge port of the heating furnace; an oscillating container of the spindle plate; a support bracket, one end of which is supported and fixed in a housing to support the spindle plate and the oscillating container; a cooling collector arranged on the right bottom of the oscillating container, and a plurality of blowers to cool and collect the generated crystallized bones passing the spindle plate and the oscillating container.

The invention relates to a method for preparing high-purity tetracycline hydrochloride. Tetracycline urea double salt and hydrochloric acid serve as raw materials, and reaction of the tetracycline urea double salt and hydrochloric acid and crystallization of tetracycline hydrochloride are simultaneously performed. The method comprises the following steps of: mixing the double salt with an organic alcohol mixed solvent according to a ratio, adding hydrochloric acid at the temperature of 5-20 DEG C, continuously stirring and filtering; transferring the filtrate into a crystallizer, raising the temperature, adding a seed crystal when the system temperature reaches 27-32 DEG C, further raising the temperature to 40-50 DEG C, and growing the grain at constant temperature; reducing the temperature of the suspension to 5-20 DEG C; and filtering, washing and drying the obtained crystal mush, thereby obtaining a tetracycline hydrochloride crystal product. The reaction and crystallization processes in the solvent system are screened and optimized, the tetracycline hydrochloride crystal which is uniform in particle size distribution, zero in coalescence and complete in crystalline form and has the purity of more than 98.0 percent is obtained, and the process yield is more than 88.0 percent. The problems that the product is non-uniform in particle size distribution and severe in coalescence so that the purity of the product is reduced are solved, and the product quality is obviously improved.

The invention relates to a high molecular weight acrylic resin for a polyvinylidene fluoride coiled material finish paint. The acrylic resin is combined with polyvinylidene fluoride resin as a coiled material finish paint base-material, is a bead-shape transparent particle and has a number-average molecular weight Mn higher than 90 thousand and molecular weight distribution Mw / Mn less than 2.0. The resin of the invention is prepared by a suspension polymerization method from material monomers of 50-80 wt% of methyl methacrylate and / or methyl acrylate, 10-40 wt% of ethyl acrylate and / or methyl methacrylate and 0-40 wt% of one or more selected from acrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate, methacrylic acid, hydroxyethyl methacrylate, hydroxypropyl methacrylate, butyl acrylate and butyl methacrylate. The high molecular weight acrylic resin of the invention can be combined with a PVDF resin, and a prepared finish paint film has comprehensive properties the same as an imported one and better performances on MEK-resistant wiping frequency and artificial ageing resistance.

The invention provides a heptahydrate crystal and a preparation method. The preparation method includes the following steps that 1, sulfuric acid is dissolved in reaction liquid, and the reaction liquid is binary solvent and / or crystallization mother liquor of alcohol and water; 2, a zinc source is added, the molar ratio of the zinc source to sulfuric acid is controlled to be 1:1+ / -0.1), and a reaction is conducted for a certain time; 3, sulfuric acid is supplemented, the molar ratio of the supplemented sulfuric acid and the zinc source added in step 2 is controlled to be (0.05-0.25):1, and the reaction is continued for a certain time; 4, after the reaction is ended, a solution is cooled and separated, the separated solid is subjected to postprocessing, and a product of the heptahydrate crystal is obtained. The product of the heptahydrate crystal has obvious prism-shaped crystallization habit, and dewatering endothermic peaks exist at the temperature of 75+ / -1 DGE C, the temperature of 103 + / -1DEG C, the temperature of 124+ / -1 DEG C and the temperature of 276+ / -1 DEG C of a differential scanning calorimetric curve.

The invention relates to azoxystrobin acetic acid solvate and a preparation method thereof. Its X-ray powder diffraction pattern is at diffraction angle 2θ=7.40±0.20°, 8.28±0.20°, 13.26±0.20°, 14.07±0.20°, 14.52±0.20°, 18.08±0.20°, 18.42±0.20°, 18.86±0.20 °, 20.46±0.20°, 21.18±0.20°, 22.14±0.20°, 22.68±0.20°, 24.46±0.20°, 26.88±0.20°, 28.60±0.20°, etc. have characteristic peaks, of which 7.40±0.20° is the starting point peak, the relative intensity of the characteristic peak at 21.18±0.20° is 100%. The preparation method is a constant-temperature suspension crystallization method, and the operation is simple, the reproducibility is good, the product has good fluidity, is not easy to coalesce, and is easy to be industrialized.

The invention relates to azoxystrobin 1,4-dioxane solvate and a preparation method. Its X-ray powder diffraction diffraction angle expressed in 2θ angle is 8.40±0.20°, 12.96±0.20°, 14.32±0.20°, 15.20±0.20°, 16.06±0.20°, 17.80±0.20°, 18.62±0.20°, 20.16 There are characteristic peaks at ±0.20°, 21.18±0.20°, 21.56±0.20°, 22.44±0.20°, 23.76±0.20°, 24.22±0.20°, 25.72±0.20°, 26.32±0.20°, starting from 8.40±0.20° The initial peak, the relative intensity of the characteristic peak at 23.76±0.20° is 100%. The preparation method is simple, the product has high crystallinity, large particle size, good fluidity and is suitable for industrial production.