11 results about "Strontium sulfate" patented technology

The invention relates to a chromium-free environment-friendly insulating coating paint and a thin electrical steel strip. The chromium-free environment-friendly insulating coating comprises the following components in percentage by mass: 15%-23% of phosphate; 8%-13% of epoxy resin emulsion; 0.3%-1.2% of boric acid; 0.4%-4.7% of a metal inorganic salt additive; 0.3%-1.1% of a metal hydroxide; 0.1%-0.44% of a coupling agent; 7%-26% of hollow ceramic microsphere particles; and 30.56% to 68.9% of deionized water. The metal inorganic salt additive is at least one of barium oxalate, strontium sulfate and aluminum silicate. The phenomena that solid components in the coating sink to the bottom and water is separated from the surface can be avoided, the compactness of the coating is improved, the wear resistance and corrosion resistance of the coating are improved, the resistivity of the insulating coating can be remarkably improved through the nanoscale hollow ceramic microsphere particles, the loss of electrical steel is reduced, the adhesiveness of the coating is enhanced, and cracks of the coating are reduced.

The utility model relates to the field of strontium sulfate purification, in particular to a device for conveniently purifying strontium sulfate. The utility model provides a device for conveniently purifying strontium sulfate, which can directly filter and evaporate and crystallize the strontium sulfate after stirring and dissolving the strontium sulfate, realizes the integration of dissolving, filtering and evaporative crystallization, does not need to replace equipment for treatment, reduces the purification cost, improves the purification efficiency and is convenient to use. A device for conveniently purifying strontium sulfate comprises an outer frame, a sealing door and the like, and the left rear part of the outer frame is rotatably connected with the sealing door. According to the utility model, strontium carbonate and a dissolving agent flow into the dissolving pipe to be stirred and dissolved, and are filtered by the filter paper, so that liquid drips into the crystallization barrel, and the liquid is heated by the heater to be evaporated and crystallized, so that strontium sulfate can be directly filtered and evaporated and crystallized to be purified after being stirred and dissolved, and the integration of dissolving, filtering and evaporative crystallization is realized; equipment replacement for treatment is not needed, the purification cost is reduced, the purification efficiency is improved, and use is convenient.

This invention discloses an ultra-wear-resistant polished glazed tile and its preparation method, comprising a body, a base glaze layer, and an inkjet layer, as well as a wear-resistant polished glaze layer and a diamond wax layer. The wear-resistant polished glaze layer raw materials include the following components: 39-41 parts potassium-sodium feldspar, 8-10 parts washed clay, 10-12 parts calcined kaolin, 5-7 parts wollastonite, 15-17 parts dolomite, 5-7 parts strontium sulfate, and 3-5 parts zinc oxide. The diamond wax layer raw materials include the following components: 10-15% nano-sized corundum powder, 1-3% nano-sized boron nitride, 8-10% nano-sized alkaline silica sol, 6-8% nano-sized platinum-based coupling agent, 0.5-1% organosilicon penetrant, and 63-74.5% deionized water. This invention significantly improves the hardness and wear resistance of ultra-wear-resistant glazed tiles by designing an ultra-wear-resistant glaze formula and a Da Mo Wang (a type of polishing wax) formula. This effectively protects the ultra-wear-resistant glazed tiles from being scratched or abraded, while also improving transparency and stain resistance. This allows the fired ultra-wear-resistant glazed tiles to achieve both good color and texture.

The invention discloses a method and a system for resource production of strontium sulfate from strontium-containing waste residues, and belongs to the technical field of industrial solid waste resource utilization. The method comprises the following steps: carrying out wet grinding on the strontium-containing waste residue to prepare slurry; dissolving the material with hydrochloric acid, controlling the pH value and temperature to efficiently leach strontium, and adjusting the pH value to preliminarily remove impurities; oxidizing the filtrate and adjusting the pH value to 7-8 to deeply remove iron and aluminum impurities; the pure strontium liquid reacts with sulfuric acid, high-purity strontium sulfate is selectively precipitated under the acidic condition, and efficient separation of the strontium sulfate and calcium ions is achieved; and finally, carrying out solid-liquid separation and drying to obtain a strontium sulfate product. The invention also provides a system for realizing the method. The method has the advantages of simple process flow, high strontium recovery rate, high product purity, realization of recycling and harmless treatment of waste residues, realization of clean production through reuse of washing water and recovery of a byproduct calcium chloride, and substantial economic and environmental benefits.

The invention belongs to the technical field of oilfield chemical scavengers, and discloses a complexing barium-strontium descaling agent and a preparation method thereof. According to the scale remover, the scale dissolving efficiency of barium sulfate and strontium sulfate is improved based on the synergistic effect of the biological surfactant and the composite complexing agent; the use of strong acid and traditional complexing agents can be avoided, and the harm to equipment and environment is reduced. The cleaning agent is suitable for efficient cleaning of barium sulfate and strontium sulfate scales in shafts, pipelines and equipment in oil fields and industries. The quadripolymer and the modified polyepoxysuccinic acid are compounded to play a synergistic complexing role, and the scale dissolving rate of barium sulfate and strontium sulfate can reach 70%-80% by matching with the emulsifying stripping and dispersing effects of rhamnolipid; and the corrosion inhibition synergist can significantly reduce the corrosion rate to the metal pipeline. By optimizing a polymer synthesis process and adopting low-temperature ultrasonic assistance to prepare a quadripolymer and modified polyepoxysuccinic acid complexing component, the reaction time is shortened by 50%, the energy consumption is reduced by 30%, and green synthesis is realized.

The present invention relates to a composition comprising functionalized phosphonate, and water-soluble salt and N-oxide derivatives thereof, and method of use thereof as scale inhibitor. Particularly, the present invention relates to a composition comprising functionalized methylene phosphate of amino-terminated 52xyalkylated, a water-soluble salt thereof, a N-oxide salt thereof, or a water-soluble N-oxide salt thereof as scale inhibitor to prevent scales formed due to deposition of alkaline earth metal cations comprising (including) calcium, barium, strontium, magnesium, or a mixture thereof along with anions comprising (including) sulfate, carbonate, bicarbonate, phosphate, silicate, sulfide, or a mixture thereof, particularly to prevent scales formed due to deposition of calcium carbonate, calcium sulfate, barium sulfate, strontium sulfate, magnesium sulfate, or a mixture thereof at a different temperature and pressure in high salinity medium including brine environment. Particularly, the present invention also relates to method of use of a composition comprising functionalized methylene phosphonate of amino-terminated oxyalkylate, a water-soluble salt thereof, a N-oxide salt thereof, or a water-soluble N-oxide salt thereof as scale inhibitor to prevent scales formed due to deposition of alkaline earth metal cations comprising (including) calcium, barium, strontium, magnesium, or a mixture thereof along with anions comprising (including) sulfate, carbonate, bicarbonate, phosphate, silicate, sulfide, or a mixture thereof, particularly to prevent scales formed due to deposition of calcium carbonate, calcium sulfate, barium sulfate, strontium sulfate, magnesium sulfate, or a mixture thereof at a different temperature and pressure in high salinity medium including brine environment.

The present invention provides an insulating coating composition that can improve the weldability of electrical steel sheets, an electrical steel sheet including a coating layer composition having the above advantages, and a method for producing an insulating coating composition having the above advantages. [Solution] The method includes the steps of mixing a resin containing an organic substance with at least one metal phosphate selected from Mg, Al, Ca, Sr, Mn, and Zn in a ratio of the resin to the metal phosphate of 1 / 9 to 1 / 1 based on solid content, and adding at least one metal chloride selected from Al, Ca, Mg, Sr, Zn, and Fe to the mixture that has undergone the mixing step in an amount of 1 to less than 40 parts by weight based on solid content per 100 parts by weight of the mixture, wherein the metal chloride includes at least one of iron sulfate (FeSO4), aluminum sulfate, calcium sulfate, magnesium sulfate, manganese sulfate, strontium sulfate, and zinc sulfate, and the metal phosphate includes at least one of aluminum phosphate, magnesium phosphate, calcium phosphate, strontium phosphate, manganese phosphate, and zinc phosphate.

The invention belongs to the technical field of oilfield chemical auxiliaries, and particularly relates to a barium strontium sulfate scale cleaning agent and a preparation method thereof. Comprising the following steps: step 1, adding water into an ammonia-carboxy chelating agent, uniformly mixing to obtain an ammonia-carboxy chelating agent aqueous solution, and adjusting the pH value of the ammonia-carboxy chelating agent aqueous solution to 10-12 to obtain an ammonia-carboxy chelating agent alkaline aqueous solution; step 2, dropwise adding the alkaline aqueous solution of the aminocarboxy chelating agent in the step 1 into water under the ultrasonic action, and continuously performing ultrasonic treatment for 10-20 minutes after dropwise adding is finished, so as to obtain a mixed aqueous solution of the aminocarboxy chelating agent; and step 3, adding a surfactant and a demulsifier into the ammonia carboxylic acid chelating agent mixed aqueous solution in the step 2, and uniformly stirring and mixing to obtain the barium strontium sulfate scale cleaning agent. According to the present invention, the ammonia carboxylic acid chelating agent nanocrystalline aqueous solution is prepared, such that the solubility of the ammonia carboxylic acid chelating agent in the neutral water is improved, the precipitation does not occur even after the ammonia carboxylic acid chelating agent contacts with the formation water, and the scale removing effect is improved;

The invention provides a chelating agent, a barium strontium sulfate scale removal composition, a method and application, a chelating main agent is a 2, 9-bis R methylene-triethylene tetramine hexa R1 chelating main agent, R is amino, alkyl ammonia, dialkyl amino, hydroxyl, acylamino or alkoxy; r1 is an ester group, a carboxyl group, a hydroxyl group or a phosphate group. The barium strontium sulfate scale removing composition prepared by adopting the chelating agent is high in barium strontium sulfate scale dissolving speed and good in effect, and can effectively solve the problem that the barium strontium sulfate scale of an oil and gas field blocks an oil and gas circulation pipeline, and then the yield is seriously influenced.

The invention discloses a strontium chloride production method based on oxidation coprecipitation and salting-out crystallization, and belongs to the technical field of inorganic chemical industry. The method comprises the following steps: performing acidolysis on a strontium carbonate raw material, adjusting the pH value by using carbide slag, and introducing a sulfur source; converting the sulfur source into strontium sulfate microcrystals with high adsorption activity in situ by controlling oxidation conditions, and deeply removing iron and organic impurities by utilizing a coprecipitation effect; evaporating and concentrating the filtrate, maintaining a high-concentration calcium chloride background environment to generate a strong salting-out effect, and inducing strontium chloride crystals to separate out under the synergistic effect of ultrasonic waves and auxiliaries; according to the method, waste residues are creatively utilized to realize treatment of impurities with waste, meanwhile, the one-way crystallization yield is remarkably improved by utilizing the salting-out effect, and the method has the advantages of low production cost, high product purity and stable and environment-friendly process.

The application relates to the oil field oil extraction scale inhibition technical field, in particular to a sulfonate scale inhibitor for oil displacement and a preparation method thereof. The sulfonate scale inhibitor for oil displacement is obtained by taking linear polystyrene as a starting raw material, carrying out twice acetyl sulfuric acid sulfonation reaction, and then carrying out two-stage tetrabutylammonium hydroxide neutralization and sodium bicarbonate / sodium hydroxide step-by-step sodium treatment. The obtained scale inhibitor has good dispersion stability in high salinity water, has inhibition on calcium carbonate, barium sulfate and strontium sulfate composite scale, can keep compatibility with a petroleum sulfonate oil displacement system, and can be used for oil field oil displacement or squeeze anti-scale operation.