92results about How to "Increased hydrodynamic volume" patented technology

A novel detection or quantifying method for biological entities or molecules such as, but not limited to, DNA, microorganisms and pathogens, proteins and antibodies, that by themselves are target molecules or from which target molecules are extracted, comprises the steps of i) forming target molecule-dependent volume-amplified entities, ii) allowing magnetic nanoparticles to bind to said volume-amplified entities, and iii) measuring changes in dynamic magnetic response of the magnetic nanoparticles caused by the increase in hydrodynamic volume of said magnetic nanoparticles or measuring the magnetic field due to the magnetic nanoparticles as they bind to a sensor surface functionalized with a secondary capturing probe. Biosensors and kits are adapted to be used in such a method.

The invention provides a preparation method of flocculating agent. The method comprises the steps as follows: acrylamide, acrylic acid, and methyl propene acyl-oxygen ethyl dimethyl benzyl ammonium chloride are dissolved in water so as to obtain mixed solution; the molar ratio of the acrylic acid to the methyl propene acyl-oxygen ethyl dimethyl benzyl ammonium chloride is 1 to (0.5-1.5); and in an inert gas environment, the mixed solution is subjected to polyreaction under the effect of initiating agent, so that the flocculating agent is obtained. In the invention, the contents of positive charge and negative charge in the obtained flocculating agent are the same, the quality of the solution shows an antipolyelectrolyte effect, the performance of the solution cannot change acutely with the increasing of external salt concentration, and the flocculation effect is excellent. Meanwhile, the hydrophobic group carried by the flocculating agent forms physical crosslinking, so that the salt resisting capability of the flocculating agent is enhanced. Therefore, the flocculating effect is improved.

The invention discloses a tackifier copolymerization associate used for a drilling fluid and a preparation method of the tackifier copolymerization associate. The copolymerization associate comprises a constitutional unit A, a constitutional unit B, a constitutional unit C and a constitutional unit D. The constitutional unit A is N, N-dimethylacrylamide, the constitutional unit B is N-methyl diallyl propylsulfonate (MAPS) which is an amphoteric ionic monomer, the constitutional unit C is an ionic associate of the constitutional unit B and cationic polyamine, and the constitutional unit D is starch. Based on the total amount of the copolymerization associate, the copolymerization associate comprises 6-45% by weight of N, N-dimethylacrylamide, 5-35% by weight of the N-methyl diallyl propylsulfonate which is an amphoteric ionic monomer, 2-30% by weight of the cationic polyamine, and 5-35% by weight of starch. A tackifier obtained through the preparation method can resist temperature as high as 180 DEG C, can resist a saturated NaCl solution, and resist a CaCl2 solution with the concentration being 20%. The tackifier is excellent shale inhibition and filtrate reduction.

The invention discloses a grafted starch thickening agent copolymerization association compound and a preparation method thereof. The copolymerization association compound contains a structural unit A, a structural unit B, a structural unit C and a structural unit D, the structural unit A is acrylamide, the structural unit B is an amphoteric monomer methacryloyloxyethyl-N,N-dimethylpropanesulfonate (DMAPS), the structural unit C is an ion association body of the structural unit B and cationic polyamine, and the structural unit D is starch; and based on the total amount of the copolymerization association compound, the content of the acrylamide is 6-45wt%, the total content of the amphoteric monomer methacryloyloxyethyl-N,N-dimethylpropanesulfonate is 5-35wt%, the content of the cationic polyamine is 2-30wt%, and the content of the starch is 5-35wt%. Temperature resistance of the thickening agent prepared by the method can reach 150 DEG C, anti-NaCl concentration is saturated, and anti-CaCl2 concentration reaches 20%; and meanwhile, excellent shale inhibition performance and filtrate loss controllability are furthermore achieved.

The invention discloses a novel macromolecule emulsifier for cosmetics. The macromolecule emulsifier id characterized by being prepared from following components by weight: a component 1, a component 2, inorganic alkali, a crosslinking agent, an initiator, grease, an oil-in-water emulsifier and deionized water. The component 1 is the vinyl long-chain alkyl ether, acrylic long-chain alkyl ester or methacrylic acidalkyl long-chain alkyl ester with a total number of carbon atoms of 12-34; the component 2 is acryloyl dimethyl taurine; the crosslinking agent is a polyol or an organic compound containing more than two unsaturated double bonds. The invention uses monomer containing sulfonate group as a main component to design and synthesize a macromolecule emulsifier with strong thickening and emulsifying abilities; paste, cream and emulsion products produced from the emulsifier are soft and smooth on skin and do not cause greasy feeling.

Provided are a resin, a method of preparing the resin, a resin blend including the resin, a pellet, a method of preparing a resin article using the resin blend and the pellet, and the resin article. An exemplary resin in the present invention may provide a resin article of which a surface has improved mechanical characteristics and surface hardness. Further, the use of the resin enables the resin article to exhibit the above-described effects without an additional coating process for a surface of the resin article, thereby leading to a decrease in manufacturing time and cost and to an increase in productivity.

The invention provides a strongly inhibitory water-based drilling fluid, a preparation method therefor and application thereof. The drilling fluid comprises water, an amphoteric ionic polymer, anhydrous calcium chloride, a soil phase and a flow pattern modifier, wherein based on the water weight, the amphoteric ionic polymer accounts for 0.5-5 wt%, the anhydrous calcium chloride accounts for 20-70 wt%, the soil phase accounts for 0-6 wt% and the flow pattern modifier accounts for 0.1-0.4 wt%. The invention further provides a synthesis method for the water-based drilling fluid and application thereof. According to the drilling liquid provided by the invention, by virtue of a synergistic effect of the calcium chloride and the amphoteric ionic polymer, the drilling fluid has good rheological performance, filtration control performance, inhibition performance, sealing performance and lubricating performance.

The invention relates to the field of crude oil recovery and discloses polymer having a surface active function and a preparation method and application thereof. The polymer comprises a structural unit A, a structural unit B and a structural unit C, the structural unit A is shown as a formula (1), the structural unit B is shown as a formula (2), the structural unit C is shown as a formula (3), andviscosity average molecular weight of the polymer is 27-32 million. Functional monomer having surface activity and containing polymerizable acrylamide is introduced into acrylamide copolymer, so thatsurface activity, viscosifying performance and resistance to temperature and salt of a polyacrylamide solution are improved.

The invention relates to saline-alkali land soil improvement technologies, and especially relates to a Yellow River irrigation area secondary salinization land conditioner, a preparation method and application thereof. According to the invention, fluorocarbon modified polyacrylamide, desulfurization waste, mixed grass powder, a compound microorganism, an organic matter fertilizer and diatomite are mixed. The Yellow River irrigation area secondary salinization land conditioner is blended into farm manure for composting, and then the mixed manure can be applied into soil so as to effectively improve the soil structure, increase the soil moisture content, and effectively preventing soil nutrient loss.

The invention discloses an acrylamide copolymer with a sulfitobetaine structure and a synthesis method of a monomer with a sulfitobetaine structure. The acrylamide copolymer is composed of the following monomers in parts by weight: 55 to 75 parts of acrylamide, 24 to 38 parts of acrylic acid, and 1 to 7 parts of 2-(3-methylacrylamidepropyldimethylamino)ethyl sulfurous acid inner salts, and is synthesized in the presence of an initiator namely 0.1 to 0.5 part of NaSO3-(NH4)2S2O8 in a water solution with a pH value of 5 to 9 at a temperature of 30 to 40 DEG C for 6 to 10 hours. The monomer with a sulfitobetaine structure is prepared by carrying out reflux reactions between 1 part of N-(3-dimethylaminopropyl)methacrylamide and 1 to 1.2 parts of ethylene sulfite in 1,4-dioxane for 2 to 5 hours.

The invention discloses a high-injection salt-resistant polymer for oil recovery, a ternary composite system and a preparation method thereof. The monomers thereof comprise acrylamide, 2-acrylamide-2-methylpropanesulfonic acid and N-acryloyl-N'-R-piperazine. By introducing the monomers with a heterocyclic structure and a sulfonic acid group onto a polyacrylamide molecular chain, compression strength of the molecular chain is raised, hydrophilicity of the molecular chain and the microscopic reversible network structure are improved, and then resistance of shrinkage and rotation is enhanced. Thereby, the degree of crimping of the polymer molecular chain in the brine is improved, larger hydrodynamic volume is retained, salt resistance is enhanced macroscopically, and viscosity of the polymerof the brine is greatly improved.

The invention provides a microsphere-shaped double-comb type block polymer profile control and flooding agent and a preparation method thereof. The preparation method comprises the following steps: preparing an acrylamide monomer, long-chain alkylene oxide, acrylyl amino sulfonate and an acrylic avid monomer into a water solution; adding a pH (Potential of Hydrogen) regulator for adjusting the pH value to be 6 to 8; introducing nitrogen gas at the temperature of 0 DEG C to 15 DEG C; adding an oxidation reduction complex initiator and polymerizing for 3h to 10h; hydrolyzing under water-bath temperature of 70 DEG C to 90 DEG C for 1h to 4h; drying at 60 DEG C to 90 DEG C for 4h to 8h; crushing and sieving; dissolving a product into a lipophilic solvent and stirring under the water-bath temperature of 20 DEG C to 35 DEG C for 1h to 4h; heating to 40 DEG C to 50 DEG C and granulating to prepare the microsphere-shaped double-comb type block polymer profile control and flooding agent. The invention further provides the microsphere-shaped double-comb type block polymer profile control and flooding agent prepared by the method provided by the invention. The microsphere-shaped double-comb type block polymer profile control and flooding agent provided by the invention has good adaptability with a reservoir stratum and can effectively enter a deep part of the reservoir stratum, so that an efficient profile control and flooding effect is realized and the crude oil recovery factor is greatly improved.

The invention discloses a starch-containing thickening agent copolymerization association compound and a preparation method thereof. The copolymerization association compound contains a structural unit A, a structural unit B, a structural unit C and a structural unit D, the structural unit A is N,N-dimethylacrylamide, the structural unit B is an amphoteric monomer methacryloyloxyethyl-N,N-dimethylpropanesulfonate (DMAPS), the structural unit C is an ion association body of the structural unit B and cationic polyamine, and the structural unit D is starch; and based on the total amount of the copolymerization association compound, the content of the N,N-dimethylacrylamide is 6-45% by weight, the total content of the amphoteric monomer methacryloyloxyethyl-N,N-dimethylpropanesulfonate is 5-35% by weight, the content of the cationic polyamine is 2-30% by weight, and the content of the starch is 5-35% by weight. Temperature resistance of the thickening agent prepared by the method can reach 150 DEG C, anti-NaCl concentration is saturated, and anti-CaCl2 concentration reaches 20%; and meanwhile, excellent shale inhibition performance and filtrate loss controllability are furthermore achieved.

The present invention provides a highly efficient water-based drilling fluid and a synthesizing method and application therefor. The drilling fluid comprises water, a zwitterion polymer, anhydrous calcium chloride, a soil phase and a flow pattern regulator, wherein, with the weight of the water as a reference, the weight of the zwitterion polymer is 0.5-5% of that of the water, the weight of the anhydrous calcium chloride is 20-70% of that of the water, the weight of the soil phase is 0-6% of that of the water and the weight of the flow pattern regulator is 0.1-0.4% of that of the water. The present invention further provides a synthesizing method and application for the water-based drilling fluid. According to the drilling water provided by the present invention, synergy between the calcium chloride and the zwitterion polymer enables the drilling fluid to have the excellent rheological property, filtration control property and inhibiting property, plugging property and lubricating property.

The invention relates to an emulsion with both resistance reduction and thickening properties in fracturing as well as rapid dissolution and a preparation method thereof. The emulsion is obtained by the polymerization of a water-in-oil type emulsion, namely a reverse-phase emulsion, including the polymerization process of the reverse-phase emulsion and the treatment process of phase inversion performed on the emulsion after polymerization. The reverse-phase emulsion consists of an organic solvent, an emulsifying surfactant, a monomer, a nano micro-sphere containing a chain extension group, water, an initiating agent and a phase inversion surfactant. In the synthesis of the emulsion, the nano micro-sphere containing the chain extension group is introduced. A cationic surfactant is added ina reverse phase of the emulsion and absorbed on a macromolecular chain. The preparation method comprises the following five steps: organic phase preparation, water phase preparation, mixed emulsification, polymerization, and phase inversion. The emulsion with both resistance reduction and thickening properties in fracturing as well as rapid dissolution, prepared by the method, can effectively improve a fracturing effect in petroleum and natural gas exploitation.

The invention provides a water base drilling fluid, and a preparation method and application thereof. The drilling fluid comprises water, a zwitterionic polymer, anhydrous calcium chloride, a soil phase, and a flow pattern regulator, wherein, based on the weight of water, the usage amount of the zwitterionic polymer is 0.5 to 5 wt% of the usage amount of the water; the usage amount of the anhydrous calcium chloride is 20 to 70 wt% of the usage amount of the water; the usage amount of the soil phase is 0 to 6 wt% of the usage amount of the water; and the usage amount of the flow pattern regulator is 0.1 to 0.4 wt% of the usage amount of the water. The invention also provides a preparation method and application for the water base drilling fluid. According to the invention, through synergistic effects of the calcium chloride and the zwitterionic polymer, the water base drilling fluid in the invention has excellent rheological performance, filtration loss control performance, inhibition performance, sealing performance and lubrication performance.

The invention provides a tackifier for drilling fluid and a preparation method of the tackifier, and relates to the field of oilfield drilling and high-molecular polymerization, the method comprises the following steps: performing quaternization reaction on unsaturated amino acid ester and halogenated alkane to obtain a long-chain hydrophobic monomer; a long-chain hydrophobic monomer, acrylamide, acrylic acid, a sulfonic monomer, a surfactant, deionized water, a pH regulator and an initiator are subjected to a polymerization reaction, and the tackifier for the drilling fluid is obtained. The tackifier for the drilling fluid prepared by the invention is excellent in dissolving property, good in temperature resistance and salt resistance, and strong in rock carrying capacity, tackifying capacity, flow regulating capacity and hydration dispersing capacity for inhibiting clay and drilling cuttings, and the temperature resistance and high-temperature stability of the solid-free drilling fluid can be improved.

The invention discloses an ASP ternary composite oil displacing agent, which comprises the following raw materials by weight: 0.6-1 part of polyacrylamide, 12-15 parts of a surfactant, 3-4 parts of sodium silicate, 5-10 parts of ethanol, and 50-60 parts of water. According to the present invention, 2-acrylamido-2-methylpropanesulfonic acid, N,N-dimethyl acrylamide and arachidonic acid are introduced into polyacrylamide, and are cooperated with a suitable surfactant and a weak base, such that the stability, the temperature resistance, the salt resistance and the recovery rate of the oil displacing agent are improved.

The invention discloses a tackifier copolymerization associate used for a drilling fluid and a preparation method of the tackifier copolymerization associate. The copolymerization associate comprises a constitutional unit A, a constitutional unit B, a constitutional unit C and a constitutional unit D. The constitutional unit A is acrylamide, the constitutional unit B is N-methyl diallyl propylsulfonate (MAPS) which is an amphoteric ionic monomer, the constitutional unit C is an ionic associate of the constitutional unit B and cationic polyamine, and the constitutional unit D is starch. Based on the total amount of the copolymerization associate, the copolymerization associate comprises 6-45% by weight of acrylamide, 5-35% by weight of the N-methyl diallyl propylsulfonate which is an amphoteric ionic monomer, 2-30% by weight of the cationic polyamine, and 5-35% by weight of starch. A tackifier obtained through the preparation method can resist temperature as high as 180 DEG C, can resist a saturated NaCl solution, and resist a CaCl2 solution with the concentration being 20%. The tackifier is excellent shale inhibition and filtrate reduction.

The invention provides a synthesis method for an amphoteric ion copolymer for a well drilling fluid, wherein the synthesis method comprises the steps: weighing dimethylaminoethyl methacrylate and 1,3-propanesultone with the mass ratio of 2:1 to 9:1, adding 1,3-propanesultone to dimethylaminoethyl methacrylate, after reaction, filtering, extracting, and drying to obtain DMAPS; adding the obtained DMAPS and AM into a solvent, dissolving, then transferring into a reactor, next introducing N2, carrying out a deoxidization reaction, at the same time, heating up to 50-70 DEG C, then adding an initiator, carrying out a reaction to obtain a colloidal solid, and precipitating with acetone to obtain a white precipitate; and drying the obtained precipitate, and then crushing to finally obtain the amphoteric ion copolymer. The copolymer obtained by the method can sustain a temperature as high as 150 DEG C, resists NaCl saturation, resists CaCl2 saturation, has the filtrate loss reduction amount of a polymer decreased along with the increase of the salt content, and besides has the advantages of excellent shale inhibition performance.

The invention relates to the field of crude oil recovery and discloses polymer having a surface active function and a preparation method and application thereof. The polymer comprises a structural unit A, a structural unit B and a structural unit C, the structural unit A is shown as a formula (1), the structural unit B is shown as a formula (2), the structural unit C is shown as a formula (3), andviscosity average molecular weight of the polymer is 27-31.5 million. Functional monomer having surface activity and containing polymerizable acrylamide is introduced into acrylamide copolymer, so that surface activity, viscosifying performance and resistance to temperature and salt of a polyacrylamide solution are improved.

The invention provides a preparation method of flocculating agent. The method comprises the steps as follows: acrylamide, acrylic acid, and methyl propene acyl-oxygen ethyl dimethyl benzyl ammonium chloride are dissolved in water so as to obtain mixed solution; the molar ratio of the acrylic acid to the methyl propene acyl-oxygen ethyl dimethyl benzyl ammonium chloride is 1 to (0.5-1.5); and in an inert gas environment, the mixed solution is subjected to polyreaction under the effect of initiating agent, so that the flocculating agent is obtained. In the invention, the contents of positive charge and negative charge in the obtained flocculating agent are the same, the quality of the solution shows an antipolyelectrolyte effect, the performance of the solution cannot change acutely with the increasing of external salt concentration, and the flocculation effect is excellent. Meanwhile, the hydrophobic group carried by the flocculating agent forms physical crosslinking, so that the salt resisting capability of the flocculating agent is enhanced. Therefore, the flocculating effect is improved.

The invention relates to the field of research of temperature-resistant salt-resistant oil-displacing agents, and discloses a temperature-resistant salt-resistant monomer and polymer, and a preparation method and application thereof. The structure of the temperature-resistant salt-resistant monomer is disclosed as Formula (1), wherein 0<=m<=3, 1<=p<=4, and m and p are respective a whole number; R is H, C1-C3 alkylidene, C2-C3 alkyl with unsaturated double bond, or null; when R is C1-C3 alkylidene or C2-C3 alkyl with unsaturated double bond, R and N atom are linked to form a ring; when R is null, the carbon atom on the benzene ring connected with R is connected with the N atom; and M is H, Li, Na or K. The polymer provided by the invention contains the structural unit formed by polymerizing the temperature-resistant salt-resistant monomer, and has very excellent temperature resistance and salt resistance.

Novel arylisothiocyanate compounds are described that are useful for activating alcohol-containing macromolecules, for example polyethyleneglycols and cellulose, for covalent linkage to amino-groups of biomolecules, for example polypeptides such as antibodies, enzymes, and proteins.

The invention discloses an anti-calcium tackifier copolymerization complex and a preparation method thereof. The anti-calcium tackifier copolymerization complex comprises a structural unit A, a structural unit B and a structural unit C. The structural unit A is acrylamide, the structural unit B is a zwitterionic monomer methacryloyloxyethyl-N, N-dimethylpropanesulfonate (DMAPS), and the structural unit C is an ionic complex of the structural unit B and cationic polyamine. The copolymerization complex comprises, by weight, 10 to 75% of the structural unit A, 8 to 55% of the zwitterionic monomer and 1 to 50% of the cationic polyamine, and preferably, comprises 30 to 65% of the structural unit A, 20 to 60% of the zwitterionic monomer and 3 to 40% of the cationic polyamine. The tackifier obtained by the preparation method can resist a temperature of 150 DEG C, has a saturated anti-NaCl concentration and an anti-CaCl2 concentration of 20% and has excellent shale inhibition performances and de-filtration performances.

The present invention discloses a polymer with a surface active function and a preparation method thereof, the polymer contains a structural unit A, a structural unit B and a structural unit C, the structural unit A is represented by formula (1), the structural unit B is represented by formula (2), the structural unit C is represented by formula (3), on the basis of total use amount mole number of the structural units of the polymer, the content of the structural unit A accounts for 8-45 mol%, the content of the structural unit B accounts for 50-91 mol%, and the content of the structural unit C accounts for 0.001 to 5 mol%; the viscosity-average molecular weight of the polymer is 12 million-25 million; the polymer can be used as a flooding polymer for a reservoir with low to medium permeability, and has the advantages of good water solubility, strong tackability and good temperature tolerance and salt-resisting properties and surface activity, and the polymer has good oil washing effect.

The invention provides a gelling agent for acid fracturing operation and a preparation method thereof, and relates to the field of oilfield chemical assistants.The method comprises the steps that 2-methyl benzylacrylate and N, N-dimethylethanolamine are subjected to an esterification reaction, then methane chloride is added for a quaternization reaction, and a functional cationic monomer is obtained; the preparation method comprises the following steps: uniformly mixing a functional cationic monomer, a cationic monomer, a nonionic monomer, a sulfonic monomer, ammonium chloride and deionized water to obtain a water-phase reaction solution; uniformly mixing an oily solvent and an emulsifier to obtain an oil-phase reaction solution; and adding the oil-phase reaction liquid into the water-phase reaction liquid, then adding an initiator to initiate a polymerization reaction, and after the reaction is completed, adding a phase inversion agent to obtain the gelling agent for acid fracturing operation. The gelling agent for acid fracturing operation prepared by the invention is high in stability, high in dispersion speed and good in high temperature resistance, has the advantages of high viscosity, no residue, convenience in use and the like, and can improve the efficiency of acid fracturing operation.

The invention provides a hydrophobic monomer shown in a formula 1 and a preparation method thereof. The invention further provides a high molecular polymer and a preparation method thereof. Besides, the invention also provides the application of the high molecular polymer to drilling fluid. The high molecular polymer provided by the invention is suitable for water-based solid-free drilling fluid, and as a tackifier, the high molecular polymer has the advantages of good heat-resisting property and suspension stability.

The present invention provides a high-efficiency water-based drilling fluid and its synthesis method and application. The drilling fluid includes water, zwitterionic polymer, anhydrous calcium chloride, soil phase, and a flow regulator. Wherein, the weight of water is Benchmark, the dosage of zwitterionic polymer is 0.5-5wt% of water consumption, the dosage of anhydrous calcium chloride is 20-70wt% of water consumption, the dosage of soil phase is 0-6wt% of water consumption, and the dosage of flow pattern regulator is water 0.1‑0.4wt% of the dosage. The invention also provides a synthesis method and application of water-based drilling fluid. Through the synergistic effect of the calcium chloride and the zwitterionic polymer, the drilling fluid of the invention has excellent rheological properties, fluid loss control performance, inhibition performance, plugging performance and lubricating performance.

The invention discloses an environment-friendly sewage treatment flocculant and a preparation method thereof. The preparation method is characterized by comprising the following steps: S1, modifying epoxy-terminated hyperbranched poly(amine-ester) with aluminum dihydroxyaminoacetate, S2, carrying out ionization modification, S3, modifying the surface of the nano kaolin, and S4, carrying out composite molding on the flocculant. The invention also discloses the environment-friendly sewage treatment flocculant and the preparation method thereof. The environment-friendly sewage treatment flocculant disclosed by the invention is good in flocculation effect, high in efficiency, small in dosage, good in performance stability in storage and transportation, safe and environment-friendly to use, compact in flocculate, high in precipitation speed and high in suspended matter removal rate.