149 results about "Diphosphenes" patented technology

The oligomerization of ethylene using a chromium catalyst having a bridged diphosphine ligand can produce a selective product distribution (to predominantly hexene or predominantly octene / hexene) when activated with an aluminoxane. The oligomerization reaction also produces polymer by product—particularly when the aluminoxane is provided in a non-aromatic solvent. The present invention mitigates this problem.

The present invention is a new non-cyanide alkaline copper plating bath, preparation and use method thereof. In the copper plating bath, using copper sulfate or basic copper carbonate as main salt, using hydroxy-ethylidene diphosphonic acid as main complexant, using trisodium citrate, potassium citrate or potassium sodium tartrate as auxiliary complexant, using sodium nitrate or potassium nitrate as conductive salt, using sodium hydroxide or potassium hydrate as pH value regulator; the operation conditions are: cathode current density is 0.5-3.0 A / dm [2], pH of plating bath controlled between 12 and 13, plating bath temperature is 50-70 DEG. Comparing with the prior known technology, the invention has following advantages or positive effects: simple plating bath formula, easy control and operation, wide temperature range of plating bath using, high current efficiency, fine crystallization coating, good appearance color, stable plating bath, strong uniform plating and covering ability, low cost, easy wastewater treatment. The invention can be used for pre copper plating or direct electro-coppering instead of virulent cyaniding electro-coppering process.

A novel developing solution for photoresists which is suitable for use as a developing solution for a photoresist formed on an aluminum-containing base formed on a wafer. It comprises an alkali builder, a calcium compound, and a chelating agent, the chelating agent being selected from the group consisting of 1-hydroxyethylidene-1,1-diphosphonic acid, aminotrimethylenephosphonic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, ethylenediaminetetramethylenphosphonic acid, diethylencetriaminepentamethylenephosphonic acid, hexamethylenediaminetetraethylenephosphonic acid, and diethylenetriaminepenta(methylenephosphonic acid).

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 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.

A process for the production of paroxetine is described, wherein N-substituted derivatives of 4-(p-fluorophenyl)-3-hydroxymethyl-1,2,3,6-tetrahydropyridine are treated according to the following sequence of reactions: (a) hydrogenation catalyzed by transition metal complexes with chiral diphosphinic ligands; (b) -OH derivatisation and nucleophilic substitution, the substituent being sesamol; (c) N-dealkylation. The process is highly stereospecific and brings about the formation of intermediates enriched with the desired isomeric components, which are converted into paroxetine in quantitative yields.

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.

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.