19 results about "Methylphosphinic acid" patented technology

The present invention relates to an enzymatically catalyzed method for producing L-glufosinate or a phosphoester thereof. The method includes reacting an activated L-homoserine HA with a substrate S selected from methylphosphinic acid and esters thereof. Sulfhydrylase enzyme E1 is used for the enzymatic catalysis. The invention makes accessible new substrates for the enzymatic production of L-glufosinate and its phosphoesters.

The invention discloses a preparation method and application of a triazole phosphate type corrosion and scale inhibitor, and relates to the technical field of industrial water treatment chemicals. The compound is prepared by a three-step synthesis method which comprises the following steps: firstly, preparing an amino methylene phosphonic acid compound with one-NH reaction site from n ethylene (n + 1) amine, phosphorous acid and formaldehyde; secondly, preparing a triazole derivative from ethylene glycol glycidyl ether and triazole; and reacting the two products with sodium bicarbonate to obtain a target product. The target molecule contains a sodium phosphate group and a triazole group at the same time, through the synergistic effect of functional groups, intramolecular synergy of scale inhibition and corrosion inhibition functions is achieved, and the corrosion inhibition performance higher than that of a DETPMP scale and corrosion inhibitor used commercially is shown. The triazole phosphate type corrosion and scale inhibitor has good catalytic activity on photocatalytic carbon dioxide reduction under the conditions of room temperature and high temperature, the TON (carbon monoxide conversion number) can reach 1206, and the selectivity is 100%.

Organometallic precursor solutions containing one or more phosphonate, such as methylphosphonic acid, tert-butylphosphonic acid, diethoxyalyllphosphonate, benzylphosphonic acid, and phenylphosphonic acid, are described. Corresponding methods for forming radiation patternable coatings as well as methods for forming a pattern using a solventless developing process are also described. The incorporation of a phosphonate into an organometallic photoresist composition, such as an organotin photoresist composition, is described as a way to increase stability of organometallic precursor solutions, to improve the homogeneity of organometallic photoresist films, and / or to improve the patterning performance of organometallic photoresist coatings.

The invention relates to the technical field of fine chemical engineering, in particular to a continuous synthesis method of glufosinate ammonium, which comprises the following steps: A) mixing diethyl methylphosphonite, acrolein and acetic acid for condensation reaction to obtain a compound a-1; b) mixing the compound a-1 with water, and carrying out a first hydrolysis reaction under the action of a catalyst to obtain a first system; c) returning a part of the first system to the condensation reaction system in the step A), and respectively reacting ethanol and acetic acid with diethyl methylphosphonite and acrolein to generate a compound a; mixing the unreturned part in the first system with an acidic compound, and carrying out a second hydrolysis reaction to obtain a compound c; d) the compound c, an ammonia source and a cyanide source are subjected to a cyanamide reaction to obtain a compound d, the ammonia source is selected from ammonia water or a mixture of ammonia water and ammonium chloride, and the cyanide source is selected from sodium cyanide or hydrogen cyanide, and E) the compound d is subjected to a third hydrolysis reaction to generate glufosinate-ammonium.

A method of preparing an aluminum methyl methylphosphonate (AMMP) flame retardant by reacting at a reaction temperature of about 110 °C or higher for an amount of time sufficient to produce the AMMP, a reaction mixture containing an aqueous aluminum- containing methylphosphonic acid solution; and dimethyl methylphosphonate. The resulting product is intumescent.

The invention relates to the technical field of plastic films, in particular to a high-strength and high-barrier PE composite packaging film and a preparation method thereof. According to the invention, piperazine, 3-chloropropyltriethoxysilane, pretreated glass fibers, methylphosphonic acid, modified glass fibers and pentaerythritol phosphate are added to obtain the flame-retardant modified glass fibers. The flame-retardant modified glass fibers are sequentially soaked in alpha-zirconium phosphate dispersion liquid, chitosan dispersion liquid, phytic acid dispersion liquid, chitosan dispersion liquid and phytic acid dispersion liquid, and the flame-retardant reinforced fibers are obtained. The flame-retardant reinforced fibers and polyethylene resin are subjected to mixing, extrusion and granulation, and high-performance polyethylene resin is obtained; and then the high-performance polyethylene resin, the polypropylene resin, the adhesive and the ethylene-vinyl alcohol copolymer are sequentially subjected to burdening, film blowing, slitting and packaging, and the PE composite packaging film is obtained. The PE composite packaging film prepared by the invention has excellent strength, flame retardance and barrier property, so that the PE composite packaging film has a wide application prospect in the technical field of plastic films.

The invention relates to the technical field of solid waste treatment, in particular to a method for recycling metal lithium from a waste lithium battery material. The method comprises three core steps of leaching, adsorption and desorption precipitation: firstly, leaching LFP positive electrode powder by adopting a mixed leaching agent of dilute sulphuric acid and hydrogen peroxide; li < + > in the leachate is directionally adsorbed in a fixed bed through a specific modified resin adsorbent; and finally, analyzing, depositing lithium and the like to obtain the battery-grade lithium carbonate. Wherein the modified resin adsorbent is prepared from acrylonitrile and dimethylaminoethyl methacrylate through crosslinking copolymerization, nitrile group conversion and methylphosphonic acid group grafting modification, and PO4 < 3-> interference can be efficiently resisted. The method solves the problems of high acid consumption, poor adsorption selectivity, low lithium recovery rate and the like in the prior art, and has remarkable economic and environment-friendly values.

The presently claimed invention relates to dielectric polishing composition comprising (A) surface - modified colloidal silica particles comprising a negatively - charged group on the surface of the particles, wherein the surface-modified colloidal silica particles have a negative charge, a particle size of from 5 nm to 200 nm, and a zeta potential < -35 mV at a pH in the range of from ≥ 2.0 to ≤ 4.5; (B) at least one buffering agent selected from L-arginine, lysine, or histidine; (C) at least one iron (III) oxidizer; (D) at least one pH adjusting agent selected from 2-amino-2-methyl- propan-1-ol or phosphoric acid and salts thereof; (E) at least one stabilizer; (F) at least one first corrosion inhibitor selected from tetrabutyl ammonium nitrate (TAN), tetrabutyl ammonium hydroxide, tetrabutyl ammonium acetate, tetrabutyl ammonium bromide, tetrabutyl ammonium sulfate, tetrapropyl ammonium hydroxide, amino tris(methylphosphonic acid), ethylenediaminetetra(methylenephosphonic acid), triethylenetetramine hexakis(methylphosphonic acid), phosphonobutane tricarboxylic acid, or diethylenetriaminepentakis (methylphosphonic acid) (DTPMP); (G) at least one second corrosion inhibitor selected from buformin, phenformin, guanine, proguanil hydrochloride, 2- guanidinobenzimidazole, polyhexamethylene biguanide hydrochloride, polyaminopropyl biguanide, chlorhexidine, or chlorhexidine salts; and (H) aqueous medium, wherein the pH of the composition is in the range of from ≥ 2.0 to ≤ 5.0.

Organometallic precursor solutions containing one or more phosphonate, such as methylphosphonic acid, tert-butylphosphonic acid, diethoxyalyllphosphonate, benzylphosphonic acid, and phenylphosphonic acid, are described. Corresponding methods for forming radiation patternable coatings as well as methods for forming a pattern using a solventless developing process are also described. The incorporation of a phosphonate into an organometallic photoresist composition, such as an organotin photoresist composition, is described as a way to increase stability of organometallic precursor solutions, to improve the homogeneity of organometallic photoresist films, and / or to improve the patterning performance of organometallic photoresist coatings.

The invention discloses a novel composite organic phosphonic acid corrosion and scale inhibitor and a preparation method thereof, the novel composite organic phosphonic acid corrosion and scale inhibitor is prepared from the following raw materials in parts by mass: 7-10 parts of 2-hydroxy-5-methoxy-1, 3-phenylene bis (methylphosphonic acid), 3-5 parts of zinc sulfate, 7-10 parts of polyacrylic acid, 1-2 parts of benzotriazole and 30-50 parts of water, the 2-hydroxy-5-methoxy-1, 3-phenylene bis (methylphosphonic acid) is synthesized by the following method: adding 2, 6-bis (hydroxymethyl)-4-methoxyphenol into trimethyl phosphite, reacting under the conditions of room temperature and nitrogen reflux, and then hydrolyzing the reaction product in a methanol-water mixed solution to obtain the 2-hydroxy-5-methoxy-1, 3-phenylene bis (methylphosphonic acid). The corrosion and scale inhibitor has excellent scale inhibition and corrosion inhibition performance, and can effectively remove scale in an industrial circulating cooling water system, protect water pipes and equipment, improve heat exchange efficiency and reduce energy consumption and equipment loss.

The invention discloses diphosphonic acid and a salt compound thereof, a preparation method and application. The structural formula of the bisphosphonic acid and the salt compound thereof is shown as a formula (I). According to the preparation method, methyl (3-oxopropyl) phosphinic acid is taken as an initial raw material, a target product [1-hydroxy-3-(methylphosphonyl) propyl]-methylphosphinic acid is prepared through condensation and hydrolysis two-step reaction, and the target product reacts with an alkaline substance to obtain corresponding salt. The obtained target product has a bisphosphonic acid skeleton, and the bisphosphonic acid herbicide lead compound with a novel structure is beneficial to improving the weed removal effect; meanwhile, the target product is salified to obtain a salt compound, the salt compound is used for preparing herbicides for preventing and controlling green bristlegrass, amaranthus retroflexus, chenopodium album and other weeds, the obvious weeding effect is achieved, the water solubility, hygroscopicity, stability and the like of the compound can be changed by preparing the salt compound into the salt, and therefore different preparation requirements are met.

The application discloses a kind of bisphosphonic acid and its salt compound, preparation method and application.The structural formula of the bisphosphonic acid and its salt compound is as shown in formula (I).The preparation method is to prepare target product [1-hydroxy-3-(methyl phosphine acyl) propyl]-methyl hypophosphorous acid by condensation and hydrolysis two-step reaction with methyl (3-oxo propyl) hypophosphorous acid as starting material, and the target product is reacted with basic substance to obtain corresponding salt.The target product obtained by the application has bisphosphonic acid skeleton, and the novel bisphosphonic acid herbicide lead compound is beneficial to improve weed removal effect;Meanwhile, the salt compound obtained by salifying the target product is used to prepare herbicide for preventing and treating setaria viridis, amaranthus retroflexus, small gooseweed and other weeds, and has obvious weeding effect, and preparing salt can improve water solubility, hygroscopicity, stability and the like of the compound, so as to adapt to different formulation requirements.

The invention discloses a solar-blind ultraviolet region high-transmittance guanidine methylphosphonate nonlinear optical crystal and a preparation method and application thereof, the chemical formula of the crystal is [C (NH2) 3] 2 (CH3PO3), the crystal belongs to a monoclinic system, and the space group of the crystal is Cm (No.8). The guanidine methylphosphonate nonlinear optical material has excellent nonlinear optical performance, the powder frequency doubling intensity of the guanidine methylphosphonate nonlinear optical material is about 1.0 time of KDP, the light transmission range is wide, the ultraviolet cut-off edge is 207 nm, and frequency doubling laser output of an Nd: YAG (1064 nm) laser can be achieved. The growth method of the [C (NH2) 3] 2 (CH3PO3) crystal is simple, and the prepared crystal is high in quality, large in size and high in laser damage threshold (326.8 MW / cm < 2 >), is suitable for manufacturing a laser frequency conversion device, and can be applied to equipment such as an all-solid-state laser and an optical parametric oscillator.

The invention discloses a novel method for preparing refined glufosinate-ammonium, which comprises the following steps: taking methylphosphinic acid and O-acetyl or O-succinyl homoserine as substrates, sequentially adding a small molecular auxiliary agent and a Lewis acid catalyst, stirring and reacting in a solvent at 0-100 DEG C for 30 minutes, filtering, quenching and adjusting the pH value to obtain the refined glufosinate-ammonium active compound. According to the method, the whole process of a key preparation process and parameter conditions (including the ratio and the adding sequence of reaction raw materials, a catalyst, the reaction temperature, the reaction time and the like) of synthesis procedures are optimized, and stable methylphosphinic acid and biologically fermented O-acetyl or O-succinyl homoserine are innovatively used as substrates to construct a C-P bond in one step; the method overcomes the problems of long process and large amount of three wastes of traditional homoserine method refined glufosinate-ammonium, and has significant advantages of raw materials and environmental protection cost.

The invention discloses a preparation method of refined glufosinate ammonium, which comprises the following steps: taking methyl phosphinate and O-acetyl or O-succinyl homoserine as substrates, sequentially adding a solvent and a micromolecular Lewis acid catalyst, stirring and reacting in the solvent at 0-100 DEG C for 30 minutes, and desolventizing and acidizing to obtain the refined glufosinate ammonium salt active compound. According to the invention, the whole process of the key preparation process and the parameter conditions (including the ratio and adding sequence of the reaction raw materials, the catalyst, the reaction temperature and time and the like) of the synthesis process are optimized; according to the method, stable methyl phosphinate and biologically-fermented O-acetyl or O-succinyl homoserine are innovatively used as substrates to construct a C-P bond in one step, the problems that a traditional homoserine method for refining glufosinate ammonium is long in working procedure and large in three-waste amount are solved, and the method has remarkable raw material and environment-friendly cost advantages.

[bis[2-[bis(phosphonomethyl)amino]ethyl]amino]methylphosphonic acid metal salt may be used as a scale inhibitor in wellbore applications. Said scale inhibitors and related methods may incorporate controlled release characteristics. For example, a scale inhibition method may include introducing [bis[2-[bis(phosphonomethyl)amino]ethyl]amino]methylphosphonic acid metal salt (e.g., as a particulate thereof or adsorbed in a porous particle) into a wellbore penetrating a subterranean formation; heating the Compound I to a temperature of 150° F. or greater while in the wellbore and / or in the subterranean formation so as to release the Compound I; and inhibiting scale in a portion of the wellbore and / or the subterranean formation.

The present invention relates to a method for the enzymatic production of L-glufosinate or a phosphate ester thereof. The method comprises a step wherein activated L-homoserine H A is reacted with a substrate S selected from the group consisting of methyl phosphinic acid and methyl phosphinate. The present invention enables new substrates in the enzymatic process preparation of L-glufosinate and phosphate esters thereof.

The invention provides a method for preparing L-glufosinate-ammonium by catalyzing homoserine and methylphosphinic acid to react through an enzyme. The method does not include a step of producing O-acyl-L-homoserine, and the method does not use O-acyl-L-homoserine.

The invention discloses a copper powder surface modifier based on phosphonic acid groups, modified copper powder and a preparation method of the copper powder surface modifier. The preparation method of the copper powder surface modifier based on the phosphonic acid group comprises the following steps: step 1, mixing octadecylamine and methylphosphonic acid according to a molar ratio; 2, heating and refluxing in a toluene solvent under the protection of ammonia gas; and 3, removing the solvent, and drying under reduced pressure to obtain the N-octadecyl-methylphosphonic acid amide. A Cu-O-P chemical bond is formed by a-P-OH group in a phosphonic acid amide molecule and a copper surface, so that a modified layer has excellent stability and binding force; meanwhile, a hydrophobic protective barrier is constructed by an octadecyl long chain, so that oxidation is prevented, and the conductivity is kept. The structure has the advantage of double protection of chemical bond combination and steric hindrance, and compared with traditional stearic acid physical adsorption, the performance is remarkably improved.