139 results about "Diphosphenes" patented technology

This disclosure provides for a process for preparing a catalyst system comprising a) contacting a metal compound, a diphosphino aminyl ligand metal complex, and a metal alkyl for a time period to form a mixture; and b) aging the mixture. The disclosure also provides for olefin oligomerization process comprising: a) contacting i) a metal compound, ii) a diphosphino aminyl ligand, and iii) a metal alkyl to form a mixture; b) aging the mixture; c) contacting the aged mixture with an olefin monomer; and d) forming an olefin oligomer product.

The use of curable mixtures comprising

(A) at least one phosphonic diester and/or at least one diphosphonic diester and

(B) at least one compound containing at least two condensable silane groups,

as coupling agents, particularly as coupling agents in laminates comprising at least one substrate, at least one coating, at least one adhesive layer, and at least one sheet, and also a new process for producing such laminates using the coupling agents, the laminates which are producible using the coupling agents, and thermally curable mixtures comprising the coupling agents and at least one thermally curable polyester (C).

A manufacture method for synthesizing thiourea dioxide with high stability is the manufacturing method of a chemical product, which overcomes the disadvantages in other technologies and is confected by adopting the following raw materials: the molar ratio between thiourea and oxydol of 27.5 percent is 1:1.9 to 1:2.1; the mass ratio between polyethyleneglycol that is a stabilizing agent and hydroxyl ethidene diphosphonate tetrasodium is 1:1, and the quantity of polyethyleneglycol and hydroxyl ethidene diphosphonate tetrasodium can be 0.5 to 2.0 percent of the total quantity of thiourea; the mass ratio between postassium acetate that is an accelerant and ammonia bicarbonate is 2:3, and the quantity of postassium acetate and ammonia bicarbonate is 4.0 to 6.0 percent of the total auantity of thiourea. A method for preparing thiourea dioxide comprises the steps of confecting an accessory ingredient, catalysis synthesis, crystallization, dehydration, drying, and completing through packing. The main performance index of the product includes the aspects as follows: the main content of thiourea dioxide is more than or equals to 99.0 percent; residual thiourea is less than or equals to 0.1 percent, and sulphate is less than or equals to 0.17 percent; the iron content is less than or equals to 10ppm; the moisture content is less than or equals to 0.05 percent; the thermal stability is more than or equals to 55 minutes in water bath when the temperature is 95 DEG C. The manufacture method has the high yield of product and high thermal stability, effectively changes the product quality, and increases the safety performance of product transport and storage.

The present invention discloses a water treatment agent and its matched application method. It is made into the form of paste or slurry, and can be slowly and uniformly dissolved in the water completely, in addition to the water (including crystal water) said water treatment agent also contains corrosion inhibitor, antiscale, dispersing agent, sterilizing algaecide, thickening agent and pH regulating agent. The essential component of said water treatment agent is water, includes crystal water, and its cotent is 37%-50%, also contains water soluble zinc salt and hydroxyethylidene diphosphonate and its water-soluble salt. Said invention also provides its application method and steps.

The invention discloses a cloth cart. The cloth cart comprises a metal rotating shaft subjected to surface treatment. The surface treatment process includes the following steps that firstly, by mass, 1-2 parts of mercaptobenzothiazole, 0.9 part of nickel nitrate, 1.4 parts of 1-Hydroxyethylidene-1,1-diphosphonicacid, 2.3 parts of polyvinylpyrrolidone, 1.8 parts of dipyrazolone, 2.3 parts of 2,6-di-t-butyl-alpha-dimethylamino hydroquinone and 1.6 parts of tetramethyl ammonium bromide are added into 12 parts of deionized water and evenly stirred and mixed, and surface treatment working fluid is obtained; secondly, the surface treatment working fluid is heated to 53 DEG C; thirdly, the metal rotating shaft is put into the surface treatment working fluid to be steeped for 32 min, taken out and then dried. Due to the fact that the metal rotating shaft of the cloth cart is subjected to surface treatment, good rub resistance, corrosion resistance, rust resistance, heat resistance, cold resistance and weather resistance are achieved.

The present invention relates to catalytic materials for hydrogenation or asymmetric hydrogenation. In particular, the invention relates to iron (II) complexes containing unsymmetrical tetradentate diphosphine (PNN′P) ligands with two different nitro gen donor groups useful for catalytic transfer hydrogenation or asymmetric transfer hydrogenation of ketones, aldehydes and imines.

The invention discloses a composite slow-release scale inhibitor suitable for a petrochemical wastewater reusing circulating water system. The composite slow-release scale inhibitor comprises 2-butane phosphate-1,2,4-tricarboxylic acid, hydroxy ethylidene diphosphonic acid, amino trimethylene phosphonic acid and zinc sulfate. After the composite slow-release scale inhibitor is adopted, by virtue of dynamic simulation experiment on oil refinery reuse water, the water quality inhibition rate is 86.18%; by virtue of the dynamic simulation experiment on ethylene plant reuse water, the water quality inhibition rate is 86.44%, and the scale inhibiting rate is 87.42%; the corrosion rate is reduced to 0.0168 mm/a and 0.0091 mm/a, which meets the anticorrosion requirement that the corrosion rate of China petrochemical circulating cooling water is less than 0.075 mm/a. Compared with the traditional polyphosphate carboxylate composite slow-release scale inhibitor, the composite slow-release scale inhibitor disclosed by the invention has the advantages of small addition amount and good corrosion inhibition effect and scale inhibition.

A novel multi-aryl bridged long-chain diphosphine ligand is disclosed. A semi-calix[4]arene is taken as a structural skeleton and subjected to double-side decoration, so that a novel phosphine-nitrogen ligand is designed and synthesized, and also the novel ligand and a palladium salt are used for in-situ catalysis of a Suzuki coupling reaction. The preparation method of the ligand comprises: synthesizing a semi-calix intermediate bis(5-tert-butyl-3-hydroxymethyl-2-methoxyphenyl)methane, brominating the intermediate and bridging with an intermediate 2-bromo-6-diphenylphosphanylpyridine to obtain the multi-aryl bridged long-chain diphosphine ligand. The advantages comprise that the novel diphosphine ligand employs the calixarene fragment as the main body, pyridine structure is used to stabilize the molecule and to adjust the molecular cavity, and the ligand is used to catalyze the Suzuki coupling reaction in the presence of trace palladium for carbon-carbon bond construction in organic synthesis. The ligand is stable in structure; the synthesis reaction is short in time, mild in condition, high in yield, easy for mass production and commercialization; and the catalyst use amount is small when the ligand is used for Suzuki coupling reactions, and it is expected that functional groups with specific function can be introduced for promoting synthesis of multiple medicaments.

The present invention relates to a computer electronic display screen cleaning agent, which comprises, by mass, 52-56 parts of biochemical fulvic acid, 54-58 parts of benzotriazole, 50-54 parts of 1-hydroxyethylidene-1,1-diphosphonicacid, 54-58 parts of alkanol phosphate ester, 50-54 parts of hydroxyethylenediamine, 54-58 parts of sodium ligninsulfonate, 50-54 parts of caprylic/capric triglyceride, 56-60 parts of benzoic acid, 50-54 parts of potassium dihydrogen phosphate, 54-58 parts of polyacrylamide, 50-54 parts of polyethylene glycol stearate, 54-58 parts of sodium humate, 50-54 parts of polyepoxysuccinic acid, 54-58 parts of mercaptobenzothiazole, 50-54 parts of isothiazolinone, 54-58 parts of cyclic silicone oil, 50-54 parts of lecithin, 54-58 parts of permethrin, 50-54 parts of butyl acetate, 54-58 parts of dodecyl dimethyl benzyl ammonium chloride, 50-54 parts of benzimidazole allyl thioether, 54-58 parts of aliette, 50-54 parts of a silver ion antibacterial agent, and 1000-2000 parts of water. The cleaning agent of the present invention has good cleaning ability.

Chiral diphosphines are constituted by an aromatic pentatomic biheterocyclic system, suitable to act as chiral ligands and complexes between the diphosphines and transition metals. They may be utilized as chiral catalysts in stereocontrolled reactions, such as diastereo- and enantioselective reduction reactions. Process is for the preparation of these chiral diphosphines; and process is for the preparation of these complexes and for their utilization as chiral catalysts in stereocontrolled reactions.

The invention relates to the synthesis and application technology field of compounds used for metal anticorrosion, and concretely discloses a novel rosin imidazoline corrosion inhibitor, a synthetic method and applications. The initial raw material of the provided compound is rosin acid, the raw material is single and the synthetic route operation is simple. The method for preparing a corrosion inhibitor from the synthesized compound is simple, the compound is dissolved in dimethyl formamide, then the obtained solution is dissolved in water, then 1-hydroxyethylidene-1,1-diphosphonic acid is added, and uniform stirring is carried out. The corrosion inhibitor is safe and environmentally friendly, and has excellent corrosion inhibition effects. The corrosion inhibitor can be used for oil and gas field ground gathering and storage and transportation pipes, prevents damage of corrosive gases to metal materials of steel and the like and reduces corrosion loss.

The invention relates to a composition comprising acid magnetic particles (p) based on an iron compound, the acid magnetic particles (p) being complexed by one or more gem-bisphosphonate compounds, of formula I X-L-CH(PO3H2)2 (I) in which L represents an organic group connecting the X group to the gem-bisphosphonate group -CH(PO3H2)2; X represents a chemical group capable of reacting with a biovector; all or some of the X groups of the particles optionally being coupled to a biovector. The invention relates also to a process for the preparation of the compositions and their use, in particular as contrast products for Magnetic Resonance Imaging (MRI).

The invention discloses a phosphosilicate type rare earth ore flotation collector and a preparation method and an application thereof. The phosphosilicate type rare earth ore flotation collector is prepared from the following materials according to the mass ratio: 5 to 15 parts of octyl ether propyl-a-amino-1,1-diphosphonic acid, 60 to 80 parts of dist coconut fatty acid, 5 to 10 parts of hexadecyl sulfonate and 1 to 3 parts of Tween-60. The phosphosilicate type rare earth ore flotation collector has the advantages of high collecting capability, high concentrate recovery rate, low production cost, less consumption and good separation effect when the phosphosilicate type rare earth ore flotation collector is applied to the floatation of phosphosilicate type rare earth ore or xenotime.

A scale inhibitor for mechanical equipment is prepared from the following raw materials, by weight, 8-15 parts of organic phosphonate, 4-7 parts of sodium dodecyl benzene sulfonat, 8-15 parts of 1-hydroxyethylidene-1,1-diphosphonicacid, 2-6 parts of magnesium nitrate, 3-7 parts of linseed oil, 2.5-6 parts of potassium pyrophosphate, 3.5-8 parts of chloramine, 1.2-4 parts of triethanolamine, 2.5-7 parts of n-propanol and 3.4-8 parts of a thickening agent. The invention has the following beneficial effects: the scale inhibitor can be used to delay formation of dirt and scale and form a protective layer to prevent expansion of dirt and is widely applied to metal equipment such as pipelines, heat exchangers, boilers and the like.

The invention relates to a scale inhibitor for cooling water and a preparation method of the scale inhibitor. The scale inhibitor contains the following components in parts by mass: 1-6 parts of polyacrylic acid, 0.8-4 parts of 1-hydroxyethylidene-1,1-diphosphonic acid, 1.5-7 parts of potassium tripolyphosphate, 2-8 parts of phosphate ester, 50-80 parts of sodium phosphate, 0.5-2 parts of sodium 2-mercaptobenzothiazole, 0.2-0.7 part of fatty alcohol-polyoxyethylene ether, 12-22 parts of sodium humate, 15-28 parts of isopropoxyboronic acid pinacol ester, 0.5-1.2 parts of calcium acetate, 1-3.5 parts of urotropine, and 6-14 parts of citric acid. The scale inhibitor provided by the invention has a scale inhibition rate of more than or equal to 98%, and a corrosion inhibition effect of more than or equal to 98%, has good water softening and antibacterial effects, and moreover, has an effect of cleaning rust and passivating metals, thereby being a good scale inhibitor for cooling water.

A scale inhibitor for an industrial cooling water system contains raw materials of ultrapure water, polyacrylic acid, binary acylic copolymer, benzotriazole, hydrolyzed polymaleic acid, ethanol, phenol polyoxyethylene, hydroxyethylidene-1,1-diphosphonic acid, dodecyl dimethyl benzyl ammonium chloride, amino trimethylene phosphonic acid and polyamino polyether methylene phosphonate. The scale inhibitor for the industrial cooling water system is applicable to industrial water systems, boiler systems and central air conditioning systems; the phosphorus value in exterior drainage water is 0.05-0.25 mg/L; the scale inhibitor for the industrial cooling water system achieves very good complexing ability for metal ions in the water and effectively stops scaling; the crystal lattice sequence of sediments is effectively destroyed, the corrosion rate of carbon steel is 0.001-0.005 mu m/a<-1>, the adhesive speed is 1.5-3 mcm and the scale inhibiting ratio of calcium carbonate is 99.5-99.9%, the dispersion effect is good and a very good inhibiting and eliminating effect on the sediments in the water is achieved.

The invention relates to a preparation process for high-purity low-arsenic hydroxyethylidene diphosphonic acid. The preparation process comprises the following steps: with phosphorus trichloride, acetic acid and ammonium thioacetate as raw materials, controlling process conditions at first, reacting acetic acid with phosphorus trichloride in a reaction vessel to produce hydroxyethylidene diphosphonic acid and adding ammonium thioacetate in the process of the reaction; and then subjecting an obtained material to concentration and air flushing to remove impurities, adding ammonium thioacetate and carrying out arsenic removal and centrifugation so as to obtain the high-purity low-arsenic hydroxyethylidene diphosphonic acid. According to the invention, scientific technology is employed for product purification, no other substance like a crystal nucleus and a crystallization promoter is added, so no new impurity is introduced. Hydroxyethylidene diphosphonic acid in the high-purity low-arsenic hydroxyethylidene diphosphonic acid prepared in the invention is more than 95%, and arsenic content in the high-purity low-arsenic hydroxyethylidene diphosphonic acid is less than 2 ppm; the preparation process overcomes problems in packaging, transporting and on-site application of liquid hydroxyethylidene diphosphonic acid and broadens the application fields of the high-purity low-arsenic hydroxyethylidene diphosphonic acid.

Provided is a method for producing an optically active compound, in more detail, for producing an optically active compound by asymmetric hydrogenation in a high yield and asymmetric yield. The present invention also provides a catalyst for asymmetric synthesis for the above production method, especially a catalyst for asymmetric hydrogenation, containing a transition metal complex. Further, the present invention provides a new diphosphine compound useful as a ligand of the above transition metal complex and a new transition metal complex containing the above diphosphine compound.

The present invention relates to a diphosphine compound represented by the following formula (1):

a transition metal complex using the compound, a catalyst for asymmetric synthesis comprising the above transition metal complex and a method for producing an optically active compound using the above catalyst for asymmetric synthesis.