910 results about "Propylsulfonic acid" patented technology

The invention discloses a comb-type structural reactive polymer with the molecular weight ranging between 1x10<5> and 5x10<6>, wherein the main chain of the reactive polymer is obtained through the copolymerization of acrylamide monomer and functional monomers such as 2-acrylamido-2-methylpropanesulfonic acid and acrylic acid sodium salt, etc., which endues polymer aqueous solution with higher apparent viscosity and better temperature resistance and salt resistance; and the branched chain of the reactive polymer consists of unsaturated macromonomer molecule, which endues the polymer aqueous solution with higher surface activity. The invention also discloses a preparation method for the polymer, comprising the following steps: firstly, through process operation including esterification, prepolymerization and sulfonation, polyurethanes active macromonomer with a novel structure is prepared; then, under the action of oxidation reduction initiator, the copolymerization reaction of the active macromonomer and other functional micromolecule monomers is initiated quickly at low temperature. The comb-type structural reactive polymer can be used as oil displacement agent and has the advantages of high molecular weight and low surface tension, etc.

A rechargeable lithium cell comprising a cathode, an anode, a non-flammable quasi-solid electrolyte containing a lithium salt dissolved in a mixture of a liquid solvent and a liquid additive having a salt concentration from 1.5 M to 5.0 M so that said electrolyte exhibits a vapor pressure less than 0.01 kPa, a vapor pressure less than 60% of the vapor pressure of the liquid solvent alone, a flash point at least 20 degrees Celsius higher than the flash point of the liquid solvent alone, a flash point higher than 150° C., or no flash point, wherein the liquid additive is selected from Hydrofluoro ether (HFE), Trifluoro propylene carbonate (FPC), Methyl nonafluorobutyl ether (MFE), Fluoroethylene carbonate (FEC), Tris(trimethylsilyl)phosphite (TTSPi), Triallyl phosphate (TAP), Ethylene sulfate (DTD), 1,3-propane sultone (PS), Propene sultone (PES), Diethyl carbonate (DEC), Alkylsiloxane (Si—O), Alkylsilane (Si—C), liquid oligomeric silaxane (—Si—O—Si—), Tetraethylene glycol dimethylether (TEGDME), or a combination thereof.

The invention discloses a novel acidified fractured thickening agent and a preparation method thereof, and belongs to the field of macromolecular synthesis. The thickening agent is prepared by the method comprising the following steps: adopting a water solution polymerizing method, oxidizing and reducing an evocating agent, adding proper amount of chain extender into a sealed system, and copolymerizing the mixture by the reaction of methacryloyloxy trimethyl-ammonium chloride (DMC), acrylamide (AM) and 2-acrylamido-2-methyl propane sulfonic acid (AMPS). The thickening agent has the advantages of acid resistance and high temperature resistance, has favorable thickening effect, and is applied to the fields of acidified fracturing construction, strengthening oil extraction work and the like in petroleum extraction.

The invention discloses an ethers early strength type polycarboxylate water reducer and a preparation method thereof. The water reducer regards unsaturated esters, N,N-bis(2-hydroxyethyl)isopropanolamine (DIEPA), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), methyl allyl polyoxyethylene polyoxypropylene ether (TPEG) and the like as main chemical synthesis raw materials, and the main chemical synthesis raw materials are subjected to amidation and copolymerization in certain conditions under the action of a catalyst, an initiator, a chain transfer agent and the like, so that a high-molecular polymer with an amphoteric structure is obtained. The molecular structure of the water reducer comprises hydrophilic hydroxyl, hydrophilic carboxyl, hydrophilic acylamino, hydrophilic sulfonyl, hydrophobic carbon chains and a polyoxyethylene polyoxypropylene ether long-chain structure with certain stereo-hindrance effects, wherein an N containing group can improve early strength of concrete obviously. Therefore, the ethers early strength type polycarboxylate water reducer is applicable to pre-cast concrete components which need improvement of early strength.

The invention relates to a multicomponent copolymerization oil well cement fluid loss additive and a preparation method thereof. The method comprises: 10-120 portions of 2-acrylamide-2-methyl-1-AMPSA, 1-5 portions of acrylic acid and 15-50 portions of deionized water are added, stirred and then added with sodium hydroxide aqueous solution with the mass fraction of 5-10 percent for neutralizing to pH equal to 3-11; then 10 portions of acrylamide, 0.1-1 portion of complexing agent EDTA and 0.01-1 portion of chain transfer agent are added, the chain transfer agent is isopropyl alcohol or sodium benzoate, the temperature is controlled between 30 DEG C and 60 DEG C and N2 is introduced for 30 minutes; 2-10 portions of N-vinyl pyrrolidone and 0.01-0.5 portion of initiator are added, the initiator is potassium persulfate or ammonium persulfate, and the reaction is carried out for 4-12 hours. The solution keeps still for 5 hours at the temperature of 180 DEG C, and is cooled through flowing water after being taken out, without sedimentation or water separating; and the water loss is zero at the temperature of 180 DEG C according to the standards of drilling fluid, and the water loss is 48ml according to the standards of cement.

The invention relates to a method for synthesizing a chemical substance, in particular to a production method for 2-acrylamide-2-methyl propyl sulfonic acid. The method comprises the following steps that: A) firstly, 150 to 180 weight portions of acrylonitrile is added into a reactor, then 30 to 50 weight portions of sulfuric acid with the concentration of between 95 and 100 percent is stirred and synchronously added into the reactor, isobutene is aerated when the adding amount of the sulfuric acid is up to between 15 and 25 percent of the total amount, the reaction temperature is controlled between 10 and 40 DEG C, the produced pasty product is cooled to the room temperature and is separated and dried by a centrifuger to obtain a crude product of 2-acrylamide-2-methyl propyl sulfonic acid. The method adds an organic sulfonate during the reaction, which not only suppresses secondary reactions but also makes the product have larger crystal size with easy centrifugal separate, is convenient to realize the industrial production, and has high purity and yield.

The invention relates to a resistance reducing agent for fracturing quick water of a shale gas and a preparation method thereof. The resistance reducing agent for fracturing quick water of the shale gas is formed by reverse emulsion polymerization by means of combination of a water phase and an oil phase, wherein the weight part ratios of monomers to water in the water phase are sequentially as follows: the ratio of acrylamide: 2-acrylamide-2-methyl propanesulfonic acid: water is (0.7-1.3):(0.7-1.5):1; the weight ratio of monomers to oil in the oil phase is sequentially as follows: the ratio of tween 80:OP-10: white oil is (0.1-0.35):(0.1-0.35):1; and the weight ratio of the water phase to the oil phase is 1:(0.35-0.85). The preparation method comprises the following steps: (1) selecting acrylamide and 2-acrylamide-2-methyl propanesulfonic acid, and dissolving acrylamide and 2-acrylamide-2-methyl propanesulfonic acid in proportion in deionized water to prepare the water phase; (2) selecting tween 80 and white oil and mixing the tween 80 and white oil in a certain proportion to form the oil phase; (3) proportioning the water phase and the oil phase in a certain proportion, and fully mixing to form a stable water-in-oil inverse emulsion base fluid; and (4) catalyzing and initiating by an initiator to synthesize the resistance reducing agent.

The invention discloses a salt-resistant and calcium-resistant filtrate reducer applied to a drilling fluid and a preparation method of the filtrate reducer. The filtrate reducer is prepared from raw materials and water, wherein the raw materials comprise 2-acrylamide-2-methyl propane sulfonic acid, acrylic acid, acrylamide and dimethyl diallyl ammonium chloride; the ratio of m(2-acrylamide-2-methyl propane sulfonic acid) to m(acrylic acid) to m(acrylamide) to m(dimethyl diallyl ammonium chloride) to m(initiator) to m(molecular weight control agent) is (40-60) to (6-10) to (30-40) to (5-9) to (1-2) to (0.1-0.5). The molecular weight of the salt-resistant and calcium-resistant filtrate reducer applied to the drilling fluid and prepared by the preparation method is greatly improved; the coating property, the inhibition property, the heat stability and the salt-resistant and calcium-resistant pollution capacity of the filtrate reducer are greatly improved; by virtue of the salt-resistant and calcium-resistant filtrate reducer applied to the drilling fluid, the rheological property of the drilling fluid can be greatly improved; the salt-resistant and calcium-resistant filtrate reducer applied to the drilling fluid also has a high temperature-resistant effect at 150-180 DEG C.

The invention relates to an environment-response intelligent weave fabric and relative preparation. Wherein, adding the fabric which is induced by argon microwave low-temperature plasma to generate free group on surface, into the dual monomer solution of 2-acrylamide-2-methanesulfonic acid and N-isopropyl acrylamide that contains N and N'-methylene dual acrylamide cross linker to process graft polymerization reaction, while the bath ratio is 1:40, to graft the dual intelligent gel on the fiber macromolecule of fabric, to attain said inventive product. When the invention is dry, it has no difference from general fabric, but when it is wet, the gel will adsorb water to expand and block the slits between fibers, to reduce the water and gas permeability of fabric, and avoid outer penetrating into the inner layer of fabric to stop heat emission. The invention can be used to produce army waterproof clothes, heat-accumulation temperature adjustable special clothes, etc.

The invention relates to the field of chemical industry, in particular to a crotonic acid system polycarboxylic acid high-performance water reducer. The water reducer is prepared by copolymerizing 60 to 80 mass percent of first monomers, 20 to 40 mass percent of second monomers and 0 to 20 mass percent of third monomers, wherein the first monomers comprise methoxy polyethylene glycol crotonate, methoxy polyethylene glycol mono-crotonate, allylpolyethyleneglycol (APEG) and the like; the second monomers comprise crotonic acid, ethyl crotonate or ethyl crotonate and the like; and the third monomers comprise acrylic acid, methacrylic acid, maleic anhydride, methylmaleic acid, itaconic acid, methyl acrylate, hydroxyethyl acrylate, hydroxy-propyl acrylate, sodium allylsulfonate or acrylamide and the like. a preparation process for the water reducer is simple and low in cost, and the polycarboxylic acid high-performance water reducer with excellent performance can be prepared under the condition of not using high-cost monomers such as methacrylic acid, acrylic acid or 2-acrylamide-2-methylpropanesulfonic acid, sodium methallylsulphonate, sodium allylsulfonate and the like.

The invention discloses surface-modified inorganic nanoparticles as well as a preparation method and application thereof. The surface-modified inorganic nanoparticles are composed of a core of inorganic metal oxide nanoparticles and amphipathic organic segments grafted on the surface of the particles, wherein the amphipathic organic segments grafted on the surface of the particles account for 0.1-50% of total mass of the surface-modified inorganic nanoparticles; the inorganic metal oxide nanoparticles refer to one or several in aluminum oxide, silicon dioxide, titanium dioxide, zirconium dioxide and zinc oxide inorganic nanoparticles; and the amphipathic organic segments are produced from a vinyl silicane coupling agent and 2-acrylamido--methylpropane sulfonic acid through solution polymerization. The surface-modified inorganic nanoparticles can be used for preparing polymer electrolyte. Therefore, the inorganic nanoparticles are high in dispersity in a polymer matrix, and the prepared polymer electrolyte is high in lyotropic property, high in ionic conductivity and stable in electrochemical performance.

The invention discloses a preparation method of amphoteric cellulose material. The method includes: performing alkali pretreatment on cellulose to obtain alkali cellulose and achieve hydroxyl activation, using 3-chloro-2 hydroxypropyl trimethyl ammonium chloride as etherifying agent to perform quaternization modification on the alkali cellulose to obtain quaternized cellulose, using ceric ammonium nitrate as initiator and monomer 2-acrylamide-2-methyl propane sulfonic acid to perform sulphonation on the quaternized cellulose so as to achieve amphoterism of the cellulose. Preparation conditions are mild, the process is simple, operation is convenient, scaling is easy, the method has promising industrial popularization prospect, and products have high adsorption capacity, can be applied to the fields such as treatment of heavy metal ion waste water and treatment of organic waste water and can also be used as functional carriers of other materials.

The present invention discloses water treating agent containing methoxy naphthalene as fluorescent marker. The water treating agent is prepared through the first reaction of 4-chloro-1, 8-naphthalic anhydride, glacial acetic acid and 3-dimethylamino propylamine to obtain 4-chloro-N-3-dimethylamino propyl-naphthyl imide; the subsequent reaction with sodium methoxide to introduce methoxy group and obtain 4, 4-methoxyl-N-3-dimethylamino propyl-naphthyl imide, which is reacted with allyl chloride to obtain quaternary ammonium salt of 4-methoxyl-N-3-dimethylamino propyl-naphthyl imide allyl chloride as fluorescent monomer with fluorescent characteristic and double bond; and the final polymerization with phosphorus containing compound, acrylic acid and other monomer to obtain the multifunctional water treating agent with corrosion retarding, scale inhibiting, dispersing and fluorescent tracing functions.

The invention discloses a filtrate reducer for a water-based drilling fluid and a preparation method of the filtrate reducer. The filtrate reducer for the water-based drilling fluid comprises the following components in percentage by mass: 30-40 percent of acrylamide, 10-20 percent of 2-acryloylmino-2-methylpropyl sulfonate, 20-30 percent of maleic anhydride, 20-40 percent of sodium allylsulfonate, 0.1-0.2 percent of initiator and the balance of water. The filtrate reducer disclosed by the invention has the advantages of low biotoxicity, strong resistance to pollution of calcium ions and magnesium ions and good temperature resistance; and the requirements of the drilling of a gypsum-salt layer on a drilling fluid treating agent can be satisfied, and meanwhile, the filtrate reduction effect is still good in the high-density condition.

The invention relates to an early-strength polycarboxylate type high-performance water reducing agent and a preparation method. The early-strength polycarboxylate type high-performance water reducing agent is prepared from methyl allyl polyethenoxy ether, acrylic acid, maleic anhydride, 2-acrylamide-2-methyl propane sulfonic acid, sodium methallyl sulfonate, hydrogen peroxide, ammonium persulfate, L-ascorbic acid, dihydrate sodium formaldehyde sulfoxylate, mercaptoacetic acid, mercaptopropionic acid, sodium hydroxide and water. The newly-stirred concrete added with the water reducing agent has good workability; the water reducing rate can reach 30 percent or more; the 1d pressure-resistant intensity of the concrete can reach 185 percent to 198 percent; the 3d pressure-resistant intensity ratio can reach 176 percent to 187 percent; the concrete setting time is obviously shortened; the early strength of the concrete can be obviously improved; the rustiness effect on steel bars does not exist; no alkali-aggregate reaction occurs; a series of advantages such as concrete structure durability are practically guaranteed; the market prospects are wide. The product is widely applicable to various stages of commodity concrete and high-quality concrete for high-speed railways, high-speed highways, large-scale bridges, prefabricated components, airports, port buildings and the like, and is particularly suitable for being used for various concrete engineering constructions with the early strength requirements and concrete construction in low-temperature environment.

The invention discloses a high-temperature resistant and salt-tolerance filtrate reducer for drilling fluid. The method comprises the following steps: copolymerizing three monomers, namely acrylamide, 2-acrylamido-2-methyl-propanesulfonic acid and itaconic acid by using an emulsion polymerization method to obtain a copolymer, and then hydrolyzing under an alkaline condition; and participating and drying to obtain the filtrate reducer. The filtrate reducer has relatively good thermal stability and strong temperature resistance; after 0.5%-1% of high-temperature resistant filtrate reducer is added, the filtrate reducer disclosed by the invention has a good filtration reduction effect in fresh water, saline water, composite saline water and saturated brine drilling liquid. The invention also provides an emulsion polymerization method of the high-temperature resistant and salt-tolerance filtrate reducer for the drilling fluid. In comparison with a conventional polymerization method, the polymerization method disclosed by the invention has the advantages that the polymerization rate and the polymerization degree are obviously improved, the reaction time is obviously reduced, and the production cost is reduced under the premise of good product properties.

the invention discloses a acrylamide crosslinking copolymer emulsion with 35-44% acrylamide crosslinking copolymer and water and preparing method in the reversed phase emulsion-typed macromolecular thickener of cosmetic, drug and ink industry, which comprises the following steps: blending acrylamide and 2-acrylamide-2-methanesulfonic acid; adding adjuvant to mix with oil phase; adding emulsifier of water-in-oil type and adjuvant emulsion; adding emulsifier of the oil-in-water type to obtain the product.

The invention relates to a temperature-resistant salt-resistant copolymer for an oilfield, and a preparation method and application thereof, which mainly solve the problem that polyacrylamide is prone to hydrolysis and poor in temperature resistance and salt tolerance under the conditions of high temperature and high salinity. The invention adopts the following technical scheme: the temperature-resistant salt-resistant copolymer for an oilfield as shown in general formula (I) is used, wherein R1 and R2 are selected from hydrogen or C1-C16 alkyl, and R1 and R2 can not be hydrogen at the same time; M1 and M2 are independently selected from any one of hydrogen, alkali metal or ammonium; and x, y, m and n are respectively mole numbers of structural units of acrylamide, hydrolyzed acrylamide, 2-acrylamido-2-methylpropyl sulfonate and N-alkyl-substituted acrylamide, and x:y:m:n=100:(1-85):(1-140):(1-70). Thus, the technical scheme well solves the problem. The invention can be used in the oilfield application areas such as oilfield oil-extracting and oil-displacing agent, fracturing fluid thickening agent, water plugging and profile controlling agent, drilling fluid treating agent and the like. General formula (I) is shown in the specification.

The invention relates to a preparation method of a temperature-resistant anti-salt anti-shearing nano-polymer. The nano-polymer is obtained by adopting an emulsion polymerization method, and taking water as a solvent, sodium dodecyl sulfate as an emulsifying agent, an ammonium sulfate and tetramethylethylenediamine redox system as an initiating agent, and multi-vinyl modified nano silicon dioxide as a core to copolymerize with monomer acrylamide and 2-acrylamide-2-methylacrylsulfonate at certain temperature and pH value. The synthetic reaction is mild in condition, easily-available in raw material, low in cost, high in monomer conversion rate and convenient in product treatment, and the obtained nano polymer has good temperature resistance, salt resistance and shear resistance compared with a linear polymer. The preparation method can be widely applied to the fields of oilfield development and the like.