31 results about "Polymetaphosphate" patented technology

a. A polymetaphosphate composition and method for temporarily sealing a well formation in a wellbore to facilitate a treatment therein and a well tool which can include a flow path, and a flow blocking device which selectively prevents flow through the flow path. The well tool can include a polymetaphosphate composition. A method of constructing a downhole well tool can include forming a structure of a solid mass comprising a polymetaphosphate composition, and incorporating the structure into the well tool.

The invention relates to the use of polymetaphosphates for intra-articular application for the treatment of microcrystalline arthropathies. The preparation comprises a diluent water solution and a linear or cyclic polymetaphosphate in lyophilized powder, in which the volume of diluent solution and the weight / volume ratio of lyophilized polymetaphosphate powder and diluent solution are comprised within defined fields, and the treatment is carried out by step-wise lavage, i.e. using in succession a plurality of defined portions of reconstituted solution for a joint lavage, or by continuous lavage.

The invention relates to a preparation method of a furnace bottom roller graphite carbon sleeve impregnating solution, belonging to the technical field of graphite carbon product processing. Raw materials include water, polyphosphate, polymetaphosphate, inorganic additives, active additives, dispersing agents and trace additives. When in use, a graphite product (2) is heated to reach 300-500 DEG C, and the heated graphite product (2) is impregnated into an impregnating solution inside a pressurized impregnating device (3) for 18-30 hours at the temperature of 70-120 DEG C and the pressure of 0.4-0.6 MPa while the graphite product (2) is hot. The invention has the advantages of simple process and convenience for operation and is beneficial to the industrial implementation.

The invention discloses a preparation method of a degradable agricultural plastic mulching film for planting sugarcanes. The preparation method comprises the following steps: adding nano-halloysite and N-carbonyldimidazole into dimethyl sulfoxide, stirring, adding amino mono-terminated polydimethylsiloxane, continuing to stir, filtering, washing until the mixture is neutral, and drying, so as to obtain a first material; adding the first material into a formaldehyde water solution, uniformly mixing saturated ammonium hydroxide ammonia water, adding urea, perchloric acid oxidized starch, heatingthe mixture for reflux, adding acetic acid in the reflex process, adjusting the pH value of the system to 7.1-7.4, and continuing to stir, so as to obtain a second material; uniformly mixing the second material with nano-silicon dioxide, adding polyhydroxybutyrate-hydroxyvalerate, polylactic acid, etherified starch, chitosan, a chelated organic titanate coupling agent, ground phosphate rock, fishbone dust, plant ash, sylvine, carboxymethylcellulose, magnesium oxide, polymetaphosphate and butyl oleate, carrying out extrusion and plasticizing, carrying out blow molding to obtain a film, coolingfor shaping, and reeling, so as to obtain the degradable agricultural plastic mulching film for planting sugarcanes.

The invention discloses a solution for achieving in-situ hole sealing on a micro-arc oxidation coating on a magnesium alloy surface and a preparation method of the micro-arc oxidation coating, and belongs to the field of magnesium alloy surface processing technology. The preparation method of the solution comprises the following steps: dissolving fluotitanate, polyphosphate, and polymetaphosphate in distilled water, adding hydroxides to generate a large amount of white colloidal suspension particles, adding an organic additive, adjusting the pH value to 5-10, and allowing the system to stand still for a whole day so as to obtain the solution. A magnesium alloy work tool is soaked in the solution to carry out micro-arc oxidation so as to obtain the micro-arc oxidation coating. The electrolyte will carry out hydrolysis reactions to generate TiO2 sol particles, the TiO2 sol particles will participate in the micro-arc oxidation film-forming process, and thus the formed micro-arc oxidation coating is mainly composed of titanium-containing oxides having a good chemical stability; because the freezing points of the substances in the coating are different, the micro pores in the coating are sealed automatically during the film-forming process, and thus the post treatment of pore sealing is saved.