171 results about "Phosphite salt" patented technology

The chemical plating process for magnesium-base material includes the following steps: 1. alkaline dewaxing the magnesium-base material; 2. activating with acid solution containing fluoric salt and no chlorine ion and in pH 2.0-5.0, and treating with alkaline neutralizing solution containing alkali metal salt of pyrophosphoric acid, fluoric salt and hypophosphite in pH 8.0-12.0; 3. chemical nickel pre-plating with the plating solution containing nickel salt in 10-80 g/L concentration, fluoric salt in 5-50 g/L concentration, pyrophosphite in 20-100 g/L concentration and no chlorine ion and in pH 5.0-9.0; 4. chemical nickel plating with the plating solution containing nickel salt in 10-100 g/L concentration, pyrophosphite in 10-80 g/L concentration and no chlorine ion and in pH 3-7; and 5. optional heat treatment. The said process can form homogeneous compact nickel layer with sufficient binding force on magnesium-base material.

A lubricating oil composition contains: at least one lubricating base oil selected from the group consisting of a mineral lubricating base oil and a synthetic lubricating base oil; (a) a neutral phosphorus compound; (b) at least one acid phosphorus compound selected from the group consisting of a specific acid phosphate amine salt and a specific acid phosphite; and (c) a sulfur compound.

Disclosed herein is a method for the preparation of metal phosphide nanocrystals using a phosphite compound as a phosphorous precursor. More specifically, disclosed herein is a method for preparing metal phosphide nanocrystals by reacting a metal precursor with a phosphite compound in a solvent. A method is also provided for passivating a metal phosphide layer on the surface of a nanocrystal core by reacting a metal precursor with a phosphite compound in a solvent. The metal phosphide nanocrystals have uniform particle sizes and various shapes.

Solid phosphite compositions comprising tris(4-t-alkylphenyl)phosphites and selected hydroxyalkyl amines exhibit surprising performance compared with other phosphite stabilizers in the stabilization of polymers, such as polyolefins and the like, particularly in the prevention of color formation during high temperature processing or when exposed to certain gasses during storage, e.g., “gas fading”.

The invention discloses a preparation method of a ferrous silicate lithium doped anode material. The preparation method comprises the following steps of: weighing lithium salt, ferrous silicate salt, a silicon compound and phosphate according to the mole ratio being (0.95-1.10):(0.95-1.10):(0.80-0.999):(0.001-0.286) of lithium ions to ferrous silicate ions to silicon atoms to phosphorous acid radical ions in an initial reactant and mixing the compounds to obtain an initial reaction mixture; adding a carbon-containing compound which is 1-30 percent of the weight of an anhydrous state compound of the initial reaction mixture and a wet milling medium which is 0.10-10 times of the volume of the anhydrous state compound; ball milling and mixing and heating in a water bath; ball mixing and mixing gain; finally drying; placing the dried powder in an inert atmosphere or a weakly reducing atmosphere; and preparing doped ferrous silicate lithium by adopting a two-stage sintering method or a two stage program temperature-rising sintering method. The electrode material has better discharge performance; the discharge capacity of the prepared sample in a 3.0V zone is remarkably increased; and the prepared sample has excellent circulating performance under the current of 0.3C multiplying power, which lays a sound foundation for the industry.

A water soluble liquid fertilizer concentrate is provided that includes a bio-available phosphorus source, said phosphorus source consisting essentially of a phosphite salt. At least one of a bio-available nitrogen source and a bio-available potassium source are also provided. At least one micronutrient of calcium, magnesium, cobalt, iron, manganese, copper, boron, zinc, or molybdenum is present in the concentrate as an aqueous solute or soluble chelates. In some embodiments, the at least one phosphite salt is present at between 30 to 57 total weight percent dissolved in water and optionally contains a phosphate salt. A process of fertilizing a crop includes diluting the fertilizer concentrate with water to obtain a liquid fertilizer solution. The liquid fertilizer solution is then applied to the crop and after by allowing sufficient time, the fertilizer solution promotes growth of the crop.

A plant cultivation system, including methods, apparatus, plants, and compositions, for utilizing phosphite as a nutrient to support growth of a transgenic plant and as a control agent for unwanted organisms, such as weeds and/or algae, among others. In an exemplary method, an effective amount of phosphite is applied to a substrate, and/or to foliage above the substrate, to enhance growth of a transgenic plant and/or to act as a weed-control agent that kills weeds and/or directly suppresses growth of weeds near the transgenic plant. In another exemplary method, soil is tested for a content of phosphate, and an effective amount of phosphite for supporting growth of a transgenic plant and controlling weeds is selected and applied based on the content of phosphate. In yet another exemplary method, phosphite is used to control algae in a hydroponic system.

The invention discloses a special double-toothed phosphonic acid-based water reducing agent for the medium and low slump concrete. The structure of the water reducing agent is as follows: one end is abis-phosphorous acid or bis-phosphite G linked by the N atom which is called as the terminal end double-toothed adsorption group, the other end is a polyether chain P prepared by carrying out the alkoxylation reaction of an initiating agent of a C1-C12 saturated alkyl or unsaturated alkyl and ethylene oxide or propylene oxide, the two ends are connected by a connecting arm L, and the connecting arm L is an aliphatic or aromatic group of C1-C10. According to the special double-toothed phosphonic acid-based water reducing agent for the medium and low slump concrete, the long-term stable slump retention of the medium and low slump concrete can be achieved, the workability is improved, and the mechanical properties and durability of the concrete are improved, so that the water reducing agentis suitable for special projects such as nuclear power, hydropower, super-high-rise buildings, super-long-span bridges and the like.

The invention discloses an additive composition for polymer as well as a preparation method for the additive composition for the polymer and a flame retardant thermoplastic polymer molding material constituted by the additive composition for the polymer. The additive composition for polymer comprises the following components: a component A, namely 80wt%-99.99wt% of dialkyl phosphinate with a structure as shown in a formula (I); a component B, namely 0.001wt%-0.5wt% chloride with weight content of chlorine elements in the total additive as 60-800ppm; a component C, namely 0wt%-20wt% of alkyl phosphonate with a structure as shown in a formula (II); a component D, namely 0wt%-0.9wt% of phosphite with a structure as shown in formula (III), based on 100wt% in total, wherein the weight fractions of the components C and D are not 0wt% at the same time. The additive disclosed by the invention is applied to the polymer, so that the corrosion degree of the flame retardant polymer to a mixing combined device screw is greatly lowered, the energy and labor loss caused by frequently replacing the screw in a processing process is further reduced while the equipment processing cost is lowered; the whiteness of the polymer part obtained by extrusion molding is superior to that of the polymer part modified by the normal dialkyl phosphinate.

Phosphite dehydrogenase mutant enzymes were generated that provide relaxed cofactor specificity and increased thermostability over the wild type enzyme. The mutant enzymes are useful for nicotinamide cofactor regeneration.

The invention relates to a halogen-free heat-proof low-smoke and flame-retardant polyester compound and a preparation method thereof. The compound comprises polyester resin (1), a phosphate (phosphite ester) and phosphate (phosphite) composite flame retardant (2), a flexibilizer (3), an enhancement and reinforcement modifier (4), an accelerant (5) and an additive (6), which are injected into a high-speed mixer to be mixed according to a certain weight ratio and injection sequence so as to obtain a semi-finished product; and the semi-finished product is added into an equidirectional double-screw extruder through a quantifier to be extruded and pelletized to obtain the product. The polyester compound can be made into a plastic workpiece with a complicated structure, a favorable appearance and an extremely short forming period through mould pressing or injection moulding, has favorable runnability and heat resistance, as well as very low mist generation quantity, in high-speed injection-moulding forming, also has remarkable heat resistance, UV resistance and dimensional stability, reaches the 500 V comparative tracking index and can satisfy the UL94-V0 requirement under the condition that the thickness of the plastic piece is 0.5 mm-0.8 mm.

The process and catalyst of this invention can be utilized to synthesize homo and copolymers of conjugated diene monomers and vinyl aromatic monomers having high trans contents of greater than 60% with low melting points. These homo and copolymers of conjugated diene monomers and vinyl aromatic monomers can be utilized in tire tread and sidewall rubbers that exhibit outstanding wear and tear characteristics in the tread and excellent flexing properties in the sidewall. The rubber polymers of this invention are made utilizing an improved catalyst system. This catalyst system is comprised of (a) organo aluminum compounds, (b) organo lithium compounds, (c) a barium compound selected from barium salts of (i) di(ethylene glycol) ethyl ether, (ii) di(ethylene glycol) propyl ether, (iii) di(ethylene glycol) hexyl ether, (iv) di(N,N-dimethyl amino glycol) ethyl ether, (v) menthol and thymol in the presence of polar modifier consisting of water, alcohols, amines, thiols, phosphates and phosphites. The trans polymers and copolymers of this invention made with the above catalyst system typically have a glass transition temperature ranging from −97° C. to −40° C., a melt temperature ranging from −30° C. to +30° C., and a number average molecular weight from 20,000 to 250,000. The inclusion of such polar modifiers in the barium catalyst system results in a high styrene content in copolymerization, a high trans content, and high molecular weight. Copolymers of conjugated diolefin monomers and vinyl aromatic monomers made with the catalyst system of this invention also have a tapered macrostructure.

Stabilizer compositions comprise phosphate of the formula (I) or (II), a phosphite of the formula (III), and a phenol of the formula (IV) as these formulas are defined herein. The stabilizer compositions are useful for stabilizing polymers. Methods for making stabilized polymer compositions involve intermixing the stabilizer compositions and the polymers, e.g., by extruding, pelletizing, and/or molding.

The invention discloses a treatment method of chemical nickel-plating waste liquid. The treatment method comprises the following steps: S1, nickel precipitation: adding a precipitant into the chemicalnickel-plating waste liquid to precipitate nickel, and filtering and separating the nickel; S2, oxidization: oxidizing hypophosphite and phosphite into orthophosphate by adopting an iron-carbon micro-electrolysis oxidation method,wherein the nickel ions are reduced into elemental nickel through iron, and the Fe<2+> is generated at the same time, then adding hydrogen peroxide to oxidize the Fe<2+>in the waste liquid is oxidized into Fe<3+>, and oxidize the hypophosphite and phosphite into orthophosphate, wherein the Fe<3+> and orthophosphate form an iron phosphate precipitate. The method hasthe advantages that nickel and phosphorus in the chemical nickel plating waste liquid can be separated through one-step treatment, so that the waste liquid reaches the national emission standard, andthe treatment method is simple and low in cost.

A method for manufacturing a melamine derivative mixture, comprising: firstly, reacting at least a nitrogen containing compound and a metallic phosphite or hydrogen phosphite salt in an aqueous solution; and secondly, heating the resultant reaction mixture in solid form, at a temperature comprised between 150-500 DEG C in the presence of an oxidant, to obtain a melamine derivative mixture. The thus obtained melamine derivative mixture is found to be useful as a flame retardant in epoxy polymers and help retain their physical properties.

The invention relates to a water-reducing bulk polymerization solid polycarboxylate superplasticizer. Raw materials for preparing the water-reducing bulk polymerization solid polycarboxylate superplasticizer comprise unsaturated polyether, an alkenyl unsaturated monomer, an oxidizing agent and a phosphite or hypophosphite chain transfer agent. The invention also relates to a preparation method, ause method and an application of the water-reducing bulk polymerization solid polycarboxylate superplasticizer. The bulk polymerization solid polycarboxylate superplasticizer is prepared from odorlesssmall materials, conforms to the development trend of environment-friendly green chemistry, and is simple in preparation process, high in water reducing rate and good in slump retaining effect.

A lubricating oil composition includes: a lubricating base oil; a component (A) that is a metal detergent having a base value of less than 100 mgKOH/g; a component (B) that is a metal detergent having a base value of 100 mgKOH/g or more; a component (C) that is a tertiary amine represented by a formula (1) below,

in which R¹ is a hydrocarbon group having 4 carbon atoms or more, and R² and R³ each are a hydrocarbon group having 4 carbon atoms or less; and a component (D) that is at least one of acid phosphate and acid phosphite.