37results about How to "Less precipitation" patented technology

A portable water treatment system and apparatus is disclosed that can effectively and efficiently treat aqueous fluids by quickly and reliably adjusting and controlling the free residual level of disinfectants, contaminants or additives through the addition of one or more treating agents such as oxidizing chemicals and / or other special-purpose additives, and that can continuously store, log, retrieve and report the related fluid composition data and other operating parameters on a real-time basis at either the use site or a remote location. A preferred use for the subject system and apparatus is managing the chemistry of disinfectant, contaminant and / or additive levels in aqueous fluids used in hydraulic fracturing operations, and controlling the free residual levels of the disinfectant or contaminants within the fluids, including fluids maintained in frac tanks during temporary cessation of a hydraulic fracturing operation.

The present invention addresses the problem of providing a polyamide acid resin composition which is able to be formed into a varnish that has a low viscosity, and which is capable of providing a coating film that exhibits excellent mechanical properties after being fired. The present invention also addresses the problem of providing a polyamide acid resin composition wherein a terminal acid anhydride group is less reacted with a diamine and less diamine is precipitated in a varnish. The problems can be solved by a polyamide acid resin composition which is characterized by containing (a) a polyamide acid and (b) a compound that is represented by chemical formula (1). (In chemical formula (1), Z represents a divalent or higher-valent organic group having 2 or more carbon atoms; V represents a structure that is represented by chemical formula (2); and k represents an integer of 2 or more.) (In chemical formula (2), delta represents an oxygen atom or a sulfur atom; W represents an electron-withdrawing group; and each of R11 and R12 independently represents a hydrogen atom or a hydrocarbon group having 1-10 carbon atoms.)

The invention relates to a granular compound flocculant for water treatment compositely comprising a bilayer or multilayer flocculant. The components according to the weight percentage are as follows: aluminum salt 40%-60%, ferric salt 15%-30%, polyacrylamide 0.5%-10% and starch 1%-15%. The flocculant of the invention integrates the characteristic of both inorganic and organic flocculants, improves the dosing mode of the medicament, increases the action efficiency of the medicament by using the multilayer sustained release structure and improves the efficiency of the medicament.

A method for producing a laminated dielectric, which comprises laminating a raw material layer containing a high dielectric constant glass ceramic composition comprising from 30 to 70 mass % of a Ba—Ti compound powder having a Ti / Ba molar ratio of from 3.0 to 5.7 and from 30 to 70 mass % of an alkali free glass powder containing, by mol %, from 15 to 40% of SiO2, from 5 to 37% of B2O3, from 2 to 15% of Al2O3, from 1 to 25% of CaO+SrO, from 5 to 25% of BaO and from 25 to 50% of SiO2+Al2O3, and a raw material layer containing a low dielectric constant glass ceramic composition comprising from 10 to 70 mass % of a ceramic powder and from 30 to 90 mass % of an alkali free glass powder wherein SiO2+Al2O3 is at least 34 mol % and larger by at least 9 mol % than that in the above alkali free glass powder, followed by firing.

The present invention relates to processes for producing fermentation products from starch-containing material, wherein a thermostable alpha-amylase and optionally a thermostable protease are present and / or added during liquefaction. The invention also relates to a composition suitable for use in a process of the invention.

A yellow water-based pigment dispersion liquid is provided that includes pigment particles dispersed with a significantly small particle size, that has excellent dispersion stability, that causes less precipitation even at low viscosity, and that provides high gloss when the dispersion liquid is used as a main component of inkjet recording ink. In order to produce the water-based pigment dispersion liquid, it is important to add, as a kneading aid, an acetylene glycol surfactant having a specific structure and an HLB value of 8 to 12 to a mixture containing a bis-acetoacetallylide pigment, a styrene-acrylic acid copolymer having an acid value of 145 to 175, a basic compound, and a humectant and then to knead the resultant mixture to obtain a pigment dispersion. By dispersing the pigment dispersion in a water-based medium, a water-based pigment dispersion liquid for inkjet recording having the characteristics above can be produced.

A quick release device for faucets mainly includes a valve and a quick release unit. The valve is connected to at least two passages through which water flows, at least one passage is formed with a concave joint slot the inner circumference of which is formed with a shift limit slot. The quick release joint unit is oppositely arranged in the joint slot, and a shift limit unit is provided in the quick release joint and may be thereby fixed in the shift limit slot. A pipeline is provided that may be quickly installed on and removed from the quick release joint group. Thus, the installation time may be saved, the complicated installation steps may be reduced, and the area where flowing water contacts the metal may be decreased.

A method that can be used in a portable system and apparatus to effectively and efficiently treat aqueous fluids by quickly and reliably adjusting and controlling the free residual level of disinfectants, contaminants or additives through the addition of one or more treating agents such as oxidizing chemicals and / or other special-purpose additives, and that can continuously store, log, retrieve and report the related fluid composition data and other operating parameters on a real-time basis at either the use site or a remote location. A preferred use for the subject method is managing the chemistry of disinfectant, contaminant and / or additive levels in aqueous fluids used in hydraulic fracturing operations, and controlling the free residual levels of the disinfectant or contaminants within the fluids, including fluids maintained in frac tanks during temporary cessation of a hydraulic fracturing operation.

The present invention relates to a method for producing an acidified product using an enzyme having transglutaminase activity.

An aqueous conversion coating solution comprises a trivalent chromium compound, a zirconate compound, and a dye compound. The trivalent chromium compound can comprise trivalent chromium compounds such as trivalent chromium sulfate. The dye compound can comprise an azo dye, a chromium complex dye, an anthraquinoid dye, and / or a methine dye. The zirconate compound can comprise alkali metal hexafluorozirconate compounds. The conversion coating solution can comprise a phosphorous compound such as an organic amino-phosphonic acid compound. The conversion coating solution can be formed by mixing a dye additive containing the dye with a trivalent chromium conversion coating solution that does not contain a dye. The conversion coating solution can be used to treat metal substrates comprising aluminum, magnesium, and / or zinc.

The invention discloses a round integrated oxidation ditch. The oxidation ditch is a continuous and enclosed concentric circle like reactor, two rings outside sequentially form an external ditch (10) and an intermediate ditch (8), the liquid surfaces of the external ditch (10) and the intermediate ditch (8) are provided with a stream pushing aeration machine (1), an intermediate ring forms a secondary sedimentation tank (9), the secondary sedimentation tank (9) is internally provided with a mud scraper (4), the circumference wall of the secondary sedimentation tank (9) is provided with a water inflow skirtboard (3), the inner wall of the intermediate ditch (8) is provided with a water distributing hole (5), a mud collecting well (7) is arranged outside the round ring, and the mud collecting well (7) is internally provided with a sludge pump (6). The water distributing hole (5) interval on the inner wall of the intermediate ditch (8) is 300-600mm. The diameter Phi of water distributing hole (5) is 20-30mm. An annular effluent weir is arranged between the inner wall of the intermediate ditch (8) and the secondary sedimentation tank (9). The invention has high aeration oxygenating efficiency, stable running and convenient operation and maintenance, occupying area is small, and flow is simplified and smooth.

The invention discloses a method for separating and enriching trace lead in a substrate, which comprises the following steps: adding an alkaline precipitator into the substrate with shaking till the pH value of the solution is 7 to 9 and gelatinous precipitate appears in the solution; centrifuging the solution to obtain separated precipitate and supernate and removing the supernate; and according to test requirements, dissolving the precipitate in acid, fixing volume, and performing quantitative or fingerprint analysis on the lead in the solution. In the invention, a precipitation-centrifugation process is used to remove a large amount of Na, K and other ions which are not precipitated in the substrate from the supernate, the trace lead ions are separated and enriched at one step, the operation is simple and convenient, the repeatability is high, the recovery rate is high, fewer pollutants are introduced, and the method can be used for samples in which the substrate has high concentration and complex components.

A method for producing a laminated dielectric, which comprises laminating a raw material layer containing a high dielectric constant glass ceramic composition comprising from 30 to 70 mass % of a Ba—Ti compound powder having a Ti / Ba molar ratio of from 3.0 to 5.7 and from 30 to 70 mass % of an alkali free glass powder containing, by mol %, from 15 to 40% of SiO2, from 5 to 37% of B2O3, from 2 to 15% of Al2O3, from 1 to 25% of CaO+SrO, from 5 to 25% of BaO and from 25 to 50% of SiO2+Al2O3, and a raw material layer containing a low dielectric constant glass ceramic composition comprising from 10 to 70 mass % of a ceramic powder and from 30 to 90 mass % of an alkali free glass powder wherein SiO2+Al2O3 is at least 34 mol % and larger by at least 9 mol % than that in the above alkali free glass powder, followed by firing.

The invention relates to the technical field of remediation and safe utilization of farmlands polluted by heavy metal, and in particular to a barrier layer based safe utilization method for cadmium-polluted farmlands. The method includes adding a passivator D1 to a surface layer A1, plowing the surface layer and constructing a barrier layer A2; exchanging the barrier layer A2 with a deep layer B1 through deep plowing, plowing the barrier layer A2 to a position where root systems of bulk farm-products seldom contact, and plowing the original deep layer B1 as a plowing layer B2; fertilizing the plowing layer B2 to recover productivity, and adding a passivator D2. According to the characteristics of low background value of heavy metal, low precipitation, neutral or weakly-alkaline soil and the like in north, barrier layer construction is taken as a core, deep plowing and fertilizing are applied for assistance, and accordingly, passivated deep burying of high-cadmium-concentration soil layers is realized; a combined technology applicable to safe utilization of the cadmium-polluted farmlands in north is created, and the barrier layer based safe utilization method has the advantages of good effect, easiness in operation, easiness in popularization and the like.

The invention belongs to the technical field of high-temperature coating superconducting material preparation, and prepares a Ti-doped YBCO film through the following steps that preparing YBCO precursor solution and Ti precursor solution, preparing Ti-doped YBCO precursor solution, coating a gel wet film, sintering the gel wet film with low temperature, and sintering a precursor amorphous film with high temperature. The preparation process of the invention adopts simple devices, and has low cost, and the prepared film has higher critical current density, critical conversion temperature and a double-shaft textured structure.

An aqueous conversion coating solution comprises a trivalent chromium compound, a zirconate compound, and a dye compound. The trivalent chromium compound can comprise trivalent chromium compounds such as trivalent chromium sulfate. The dye compound can comprise an azo dye, a chromium complex dye, an anthraquinoid dye, and / or a methine dye. The zirconate compound can comprise alkali metal hexafluorozirconate compounds. The conversion coating solution can comprise a phosphorous compound such as an organic amino-phosphonic acid compound. The conversion coating solution can be formed by mixing a dye additive containing the dye with a trivalent chromium conversion coating solution that does not contain a dye. The conversion coating solution can be used to treat metal substrates comprising aluminum, magnesium, and / or zinc.

An aqueous conversion coating solution comprises a trivalent chromium compound, a zirconate compound, and a dye compound. The trivalent chromium compound can comprise trivalent chromium compounds such as trivalent chromium sulfate. The dye compound can comprise an azo dye, a chromium complex dye, an anthraquinoid dye, and / or a methine dye. The zirconate compound can comprise alkali metal hexafluorozirconate compounds. The conversion coating solution can comprise a phosphorous compound such as an organic amino-phosphonic acid compound. The conversion coating solution can be formed by mixing a dye additive containing the dye with a trivalent chromium conversion coating solution that does not contain a dye. The conversion coating solution can be used to treat metal substrates comprising aluminum, magnesium, and / or zinc.

To provide a polishing composition in which abrasives are less likely to precipitate and precipitated and agglomerated abrasives easily redisperse. A polishing composition has abrasives, a liquid medium, metal oxide particles, and a water-soluble polymer. The average primary particle diameter of the metal oxide particles is 1 / 10 or less of the average primary particle diameter of the abrasives and the weight average molecular weight of the water-soluble polymer is 200 or more and 1000 or less.

A method of improving the quality of liquid coming from a well that has a pump and pipe assembly. The method includes identifying a region of the well that is low in contamination and a region of the well that is high in contamination, and modifying the pump and pipe assembly so that suction of the assembly is enhanced in the region that is low in contamination and inhibited in the region that is high in contamination. Modifying the pump and pipe assembly can include coupling a suction control device to the pump and pipe assembly, and positioning the suction control device in the region of low contamination. In addition, modifying the assembly can include positioning a flow control disk in a location that is substantially between the region of low concentration and the region of high concentration.

The invention belongs to the technical field of semiconductor film preparation, and particularly relates to a preparation method of a zinc-oxide nanorod array film. The technical scheme adopted by the invention is as follows: the preparation method comprises the following steps of: (1) on the basis of adopting height (001)-oriented ZnO as a seed layer, putting the ZnO seed layer into an aqueous solution of zinc nitrate (Zn(NO3)2), polyethyleneimine (PEI) and hexamethylenetetramine (HMT) for epitaxial growth to obtain a (001) preferred-orientation ultralong ZnO nanorod array film; (2) carrying out fast annealing treatment on the film, and improving the photoluminescence performance of the ZnO array film. The technology has the advantages that the continuous growth of the ZnO nanorod at the temperature higher than 100 DEG C can be realized; due to the high-temperature growth condition, the crystallization quality of the nanorod is improved, the internal defects are obviously reduced; the zinc-oxide nanorod array film has excellent photoelectric performance, and is more conductive to being applied in photoelectric devices such as dye-sensitized solar batteries, ultraviolet detectors, field-effect transistors, light-emitting diodes and nanogenerators.

A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure includes a separator which contains a first region located in a flat part of an electrode body and second regions located in a pair of curved parts, the ratio (B / A) of the air permeability (B) in each of the second regions to the air permeability (A) in the first region being 0.5 or more and 0.9 or less. Further, in a section passing through the center in the axial direction of the electrode body and being perpendicular to the axial direction, the ratio (SB / SA) of the sectional area (SB) of the pair of curved parts to the sectional area (SA) of the flat part is 0.28 or more and 0.32 or less.

A method of improving the quality of liquid coming from a well that has a pump and pipe assembly. The method includes identifying a region of the well that is low in contamination and a region of the well that is high in contamination, and modifying the pump and pipe assembly so that suction of the assembly is enhanced in the region that is low in contamination and inhibited in the region that is high in contamination. The method also includes cleaning the well in the region of low contamination. Modifying the pump and pipe assembly includes coupling a suction control device to the pump and pipe assembly, and positioning the suction control device in the region of low contamination, and forming a barrier between the region of low contamination and the region of high contamination by attaching a flow control disk to the pump and pipe assembly.

A yellow water-based pigment dispersion liquid is provided that includes pigment particles dispersed with a significantly small particle size, that has excellent dispersion stability, that causes less precipitation even at low viscosity, and that provides high gloss when the dispersion liquid is used as a main component of inkjet recording ink. In order to produce the water-based pigment dispersion liquid, it is important to add, as a kneading aid, an acetylene glycol surfactant having a specific structure and an HLB value of 8 to 12 to a mixture containing a bis-acetoacetallylide pigment, a styrene-acrylic acid copolymer having an acid value of 145 to 175, a basic compound, and a humectant and then to knead the resultant mixture to obtain a pigment dispersion. By dispersing the pigment dispersion in a water-based medium, a water-based pigment dispersion liquid for inkjet recording having the characteristics above can be produced.

A steel alloy for a bearing, the alloy having a composition that provides: from 0.8 to 1.0 wt. % carbon, from 0.1 to 0.5 wt. % silicon, from 0.2 to 0.9 wt. % manganese, from 2.0 to 3.3 wt. % chromium, from 0 to 0.4 wt. % molybdenum, from 0 to 0.2 wt. % cobalt, from 0 to 0.2 wt. % iridium, from 0 to 0.2 wt. % rhenium, from 0 to 0.2 wt. % vanadium, from 0 to 0.1 wt. % niobium, from 0 to 0.5 wt. % tungsten, from 0 to 0.2 wt. % nickel, from 0 to 0.4 wt. % copper, from 0 to 0.05 wt. % aluminum, from 0 to 150 ppm nitrogen, and the balance iron, together with any unavoidable impurities.