34results about How to "Avoid easy decomposition" patented technology

To provide a near-IR absorption compound free from antimony or arsenic and excellent in stability, especially, in heat resistance, light fastness, and moisture-and-heat resistance and also an IR absorption filter, an optical information recording medium, and a resin composition excellent in durability by using the near-IR absorption compound.

The near-IR absorption compound is a diimmonium compound having the following structure and the resin composition contains the diimmonium compound:

(wherein R₁ to R₈ independently denote hydrogen atom or an optionally substituted aliphatic hydrocarbon group; R₉ and R₁₀ independently denote an aliphatic hydrocarbon group optionally containing a halogen atom; and rings A and B may further have substituent groups.).

Disclosed is an electroless palladium plating bath containing a palladium compound, at least one complexing agent selected from ammonia and amine compounds, at least one reducing agent selected from phosphinic acid and phosphinates, and at least one unsaturated carboxylic acid compound selected from unsaturated carboxylic acids, unsaturated carboxylic acid anhydrides, unsaturated carboxylates and unsaturated carboxylic acid derivatives. Such an electroless palladium plating bath has high bath stability, and decomposition of the bath hardly occurs. Consequently, the electroless palladium plating bath of the present invention has a longer bath life than conventional electroless palladium plating baths. In addition, this electroless palladium plating bath enables to obtain excellent solder bonding characteristics and wire bonding characteristics since it does not affect plating film characteristics even when it is used for a long time.

A preparation method and its use of derivatisation reagent for detecting L-carnitine or D-carnitine are provided. The present reagent is stable. It can be used for detecting L-carnitine or D-carnitine accurately and sensitively. That is to say, the reagent is applied to detecting the amount of synthesized or natural L-carnitine and the amount of mixing D-carnitine. The compound reagent is used for determining the chiral isomers of chemicals, biological reagents, health care reagents, cosmetic, body fluids and various foods, which contain L-carnitine or/and D-carnitine, and optical isomers of other chiral amino acids.

Provided is a titanium dioxide pigment having minimal yellow color and minimal yellowing due to exposure, i.e., good yellowing resistance and high pigment performance such as brightness. Also provided is a titanium dioxide pigment which has a reduced amount of volatile moisture and which does not readily decompose when blended with a resin or the like. In the present invention, a compound including 0.05-20% by mass of phosphorus and an alkaline earth metal is present on surfaces of titanium dioxide particles having an average particle diameter of 0.15-1.0 μm. The titanium dioxide pigment is manufactured by mixing an alkaline earth metal compound, a phosphate compound, and titanium dioxide particles having an average particle diameter of 0.15-1.0 μm, and bonding the compound including phosphorus and an alkaline earth metal to the titanium dioxide particles.

The invention relates to a method for recovering hydroxyacetate from waste water of phenoxyacetic acid pesticides. The method comprises the following steps: subjecting waste water in production of the phenoxyacetic acid pesticides to concentration and desalting under the conditions of pressure reduction and heating so as to obtain concentrated waste water mother liquor containing glycolic acid; and treating the concentrated waste water mother liquor under acidic or alkaline conditions so as to recover hydroxyacetate. Compared with the prior art, the invention has the following advantages: glycolic acid is converted into hydroxyacetate instead of direct extraction since the content of glycolic acid in the waste water is low and glycolic acid cannot be extracted by using a conventional extraction method after complete drying of water by distillation in the presence of water as glycolic acid decomposes at 100 DEG C and is intermiscible with water; thus, the disadvantages that glycolic acid easily decomposes at a high temperature and is hard to separate and purify are overcome, and conversion of glycolic acid into hydroxyacetate enables loss caused by decomposition of glycolic acid to be avoided and recovery efficiency to be improved.

The present invention relates to a method of adsorbing and reducing nitrogen oxides using a mixed metal oxide catalyst, and more particularly, to a method of improving the efficiency of adsorption and desorption of nitrogen oxides using a mixed metal oxide catalyst prepared from a hydrotalcite precursor. According to the invention, NOx and N₂O, which coexist with oxygen (O₂) known to be very difficult to reduce and decompose, are efficiently decomposed by adsorbing and separating NOx and N₂O from oxygen and then decomposing the adsorbed NOx and N₂O using a reducing agent.

The invention discloses a defoaming effervescent tablet containing magnesium monohydroperoxyphthalate and solving the problems of easy decomposition, unstable property, easiness in interference by organic matters, and strong stimulation and corrosivity and the like of the traditional peroxide disinfecting and sterilizing agent. The defoaming effervescent tablet contains magnesium monohydroperoxyphthalate hexahydrate, an effervescent disintegrating agent, a complexing agent, an anticorrosive agent and an adhesive.

The present invention provides supported peroxides, and a method of forming supported peroxides. Supported peroxides according to the invention are solid particles that include an organic peroxide, a metallic soap, and a polymer. In accordance with the method of the invention, supported peroxides are preferably formed by dispersing a mixture that includes at least one peroxide and at least one C4 to C30 carboxylic acid into an aqueous solution that includes a compound that is capable of reacting with the C4 to C30 carboxylic acid to form a water soluble soap. Dispersing the mixture into the aqueous solution results in the formation of an emulsion. Polymer is then added to the emulsion, and forms a polymer suspension. A polyvalent metal compound that is capable of reacting with the water soluble soap to form a water insoluble metallic soap is then added to the polymer suspension, which converts the water soluble soap into a water insoluble metallic soap that precipitates from the suspension. The organic peroxide and the polymer are entrained within the precipitate.

The present invention provides supported peroxides, and a method of forming supported peroxides. Supported peroxides according to the invention are solid particles that include an organic peroxide and a metallic soap. In accordance with the method of the invention, supported peroxides are preferably formed by dispersing a mixture that includes at least one peroxide and at least one C4 to C30 carboxylic acid into an aqueous solution that includes a compound that is capable of reacting with the C4 to C30 carboxylic acid to form a water soluble soap. Dispersing the mixture into the aqueous solution results in the formation of an emulsion. A polyvalent metal compound that is capable of reacting with the water soluble soap to form a water insoluble metallic soap is then added to the emulsion, which converts the water soluble soap into a water insoluble metallic soap that precipitates from the solution. The organic peroxide is entrained within the precipitate.

To provide an electrode for a solid-state battery, capable of improving uniformity of electrode materials and suppressing decomposition of a solid electrolyte or an electrode active material by a binder or a solvent. An electrode for a solid-state battery including a solid electrolyte including sulfide and/or oxide, an electrode active material, a binder, and a conductive auxiliary agent, at least one of the solid electrolyte and the electrode active material having a surface being modified with a surface modifying substance, wherein the surface modifying substance is at least one selected from the group consisting of carboxylate, thiocarboxylate, carboxylic acid, thiocarboxylic acid, phosphate ester, thiophosphate ester, ketone, nitrile, alcohol, thiol, and ether.

The invention relates to a method for recovering hydroxyacetate from phenoxyacetic acid pesticide wastewater. The method comprises the following steps: carrying out concentrations desalting on wastewater for producing phenoxyacetic acid pesticides under reduced pressure heating conditions to obtain a wastewater concentrate mother liquor containing hydroxyacetic acid; and continuously reacting the wastewater concentrate mother liquor with alcohol in the presence of acidic cation exchange resin as a catalyst to obtain hydroxyacetate. Compared with the prior art, the method adopting the acidic cation exchange resin to substitute other acids as a catalyst has the advantages of technologic process simplification, reduction of the wastewater discharge amount, and recycling and reuse of the catalyst.

A synthesis method of 3-methylamino-1,2-propanediol is disclosed in the invention, and it includes the following steps: (1) adding glycerin chlorohydrin, aqueous monomethylamine solution and an amination catalyst, namely NaOH solution and NaHCO₃, into a reactor, mixing the material sufficiently, and allowing amination reaction to proceed in two temperature stages; (2) removing monomethylamine and water from the amination solution after the amination reaction is completed, filtering out the solid resultant, and feeding the filtrate into a still; (3) distilling under reduced pressure to obtain 3-methylamino-1,2-propanediol, wherein the vacuum for distillation under reduced pressure is equal to or greater than 0.099 MPa and the temperature is 130-160° C. The product synthesized according to the invention, a liquid appearing colorless and transparent, has increased purity of over 99.5% (GC) and decreased impurities. Therefore, when this product is used for synthesis of iopromide as a hypo-osmolar nonionic contrast medium, it exactly meets the quality demand.

A method for preparing surface-modified nano silicon dioxide from rice hulls. The method includes: 1) pretreating rice hulls using a treating gas containing CO₂ to remove metal ions, impurities, and dusts, and desiccating and grinding the rice hulls; 2) submerging the rice hulls into a dilute solution of phosphoric acid, boric acid, hydrochloric acid, formic acid, acetic acid, propionic acid, butyric acid, or a strong-acid-weak-base salt for between 4 and 8 hrs, controlling the immersion temperature not to exceed 10° C., leaching a resulting mixture, removing a filtrate, and desiccating the rice hulls; and 3) calcining the rice hulls in the absence of oxygen at a temperature of between 300 and 450° C.