33 results about "Aminocapronsäure" patented technology

The invention provides a method for producing a hexamethylenediamine key intermediate 6-aminocapronitrile by a continuous gas-phase two-step method. The method comprises the following steps: S1, mixing caprolactam and water in a gas phase state to carry out continuous hydrolysis or mixing caprolactam and ammonia water in a gas phase state to carry out continuous hydrolysis ammoniation reaction toobtain a first product system containing 6-aminocaproic acid, 6-aminocaproic acid ammonium salt and/or 6-aminocaproamide; and S2, carrying out continuous gas-phase catalytic ammoniation and dehydration reaction on the first product system and ammonia gas to obtain a second product system containing 6-aminocapronitrile. According to the patent of the invention, the problem that water generated by reaction in a one-step process promotes polymerization reaction of the raw material caprolactam is reduced from the source, and the selectivity of aminocapronitrile is improved; and the problems of catalyst deactivation and pressure drop rise caused by polymerization and coking of caprolactam in the reactor are effectively reduced, the stability of the device is improved, and the service life of the catalyst is prolonged.

The invention relates to a composite material containing microelement for hard tissue repair and reconstruction and a preparation method thereof. The composite material further contains at least one of three microelements of strontium, zinc and copper acceptable in human body with the calcium mole ratio of 0.01-0.5% in ceramic component of calcium phosphate in the ceramic component containing the calcium phosphate and the substrate material of multi-amino acid polymer, wherein the mass ratio of the ceramic component of calcium phosphate is 30-65%, and the balance of multi-amino acid polymer polymerized by epsilon-aminocaproic acid and other amino acids. The process for preparing the calcium phosphate ceramic comprises the following steps of: adding microelement, then mixing the amino acid components evenly, removing water of various forms in the mixture at a temperature lower than or equal to 200 DEG C under the protection of inert gas, then composing in situ polymerization under the condition of 210-250 DEG C and pH of 6.5-7.5. The composite material is a bionic biomedical and tissue engineering material which has controllable degradation speed, good bioactivity and compatibility and overcomes deficiencies and problems of similar repair materials at present.

The invention relates the diamine product used to produce copolyamide hot melt adhesive. The method comprises the following steps: 1. using decanamine to prepare hot melt adhesive; 2. the copolymerization hot melt adhesive being ternary or polyvalent; 3. the copolymerization hot melt adhesive comprising a, b elementary units, a: two or many C6-13 diamine or two or many C6-13 dibasic acid, b: aminocaprolactam or aminoadipic acid; 4. 60-80% a and 20-40% b. The decanamine belongs to a. The invention has the advantages of simple technology, low cost, and easy operation.

Raw material-2-methyl-4-chlorophenoxy carboxylic acid (2-ME-4-CHL) is acrylated by sulfoxide chloride, then reacting with amino-butyric and amino-caproic acid respectively, to prepare half antigens: 4-(2-methyl-4-chlorophenoxyacetyl) amino butyric acid and 6-(2-methyl-4-chlorophenoxyacetyl) amino caproic acid (MB and MC for short, resp). And 2-ME-A-CHL itself can be half-antigen (M for short). Halfantigens M, MB and MC are coupled with protein to produce immune antigen and envelope antigen by carbodi-imide and mixed acid anhydride methods. Immue antigen immune animals are used to produce special antibody with high avidity to 2-ME-4-CHL. This antibody does not react with other compounds. Enzyme-linked immunosorbant assay established with said antibody can test trace ammount of 2-ME-4-CHL residues quickly and conveniently.

The invention discloses a synthesis method of hydroxyalkyl tertiary ammonium beta-hydroxyalkyldienediaminocaproate. The synthesis method comprises that chloroepoxyalkane and a caprolactam group undergoes a heating backflow reaction with stirring in the presence of benzene as a solvent and zinc chloride and zinc hydroxide as catalysts to produce dicaprolactam-2-ol, a sodium hydroxide solution is added into the reaction mixture, a lower layer is separated so that a sodium beta-hydroxyalkyldienediaminocaproate solution is obtained, an acid solution is slowly added into the sodium beta-hydroxyalkyldienediaminocaproate solution, a PH value of the mixed solution is adjusted to about 1.0, and the separated beta-hydroxyalkyldienediaminocaproic acid is added into the hydroxyalkyl tertiary amine so that the hydroxyalkyl tertiary ammonium beta-hydroxyalkyldienediaminocaproate is obtained. The hydroxyalkyl tertiary ammonium beta-hydroxyalkyldienediaminocaproate has multiple active adsorption centers, can improve anodic polarization performances and has corrosion inhibition effects. The hydroxyalkyl tertiary ammonium beta-hydroxyalkyldienediaminocaproate has combined characteristics of two amido groups, two carboxyl groups and metals, and has strong antirust effects and antiwear and antifriction effects.

The invention discloses a flame-retardant nylon 6 fiber and a preparation method thereof, and belongs to the technical field of functional fibers. The preparation method of the flame-retardant nylon 6 fiber comprises the steps: 1, reacting caprolactam, a flame retardant represented by the formula I, deionized water and 6-aminocaproic acid in a reaction device, to obtain flame-retardant nylon 6; and 2, drying the flame-retardant nylon 6, and performing melt spinning to obtain flame-retardant nylon 6 fiber, wherein the formula I is described in the specification. According to the preparation method disclosed by the invention, the caprolactam and the flame retardant represented by the formula I are subjected to in-situ polymerization to obtain the flame-retardant nylon 6, so that the flame retardant can be uniformly dispersed in the flame-retardant nylon 6, and the spinnability, the flame retardance, the thermal stability, the mechanical property and the hygroscopicity of the flame-retardant nylon 6 are improved.

The invention discloses a water-soluble polymer sterilizing agent and a preparation method thereof, which belong to the technical field of food safety. The preparation method comprises the following steps of carrying out a cross-linking polymerization reaction on cationic glucan, 2, 6-diaminocaproic acid and epoxy chloropropane under an alkaline condition, carrying out rotary evaporation drying to obtain an agent A, and dissolving the agent A in water to obtain an effective component agent A solution, dissolving magnesium chloride with water to obtain a magnesium chloride solution, and mixing the magnesium chloride solution with absolute ethyl alcohol to obtain a low-temperature anticoagulant B solution, and mixing the effective component A solution with the low-temperature anticoagulant B solution to obtain the water-soluble polymer sterilizing agent. The sterilizing agent is suitable for being used in an environment of -20 DEG C to 40 DEG C in a spraying manner, has the advantages of high efficiency and no freezing under a low-temperature condition, and can be used for sterilizing bacteria on cold chains, refrigeration houses and food outer packages.

The high-elasticity adult diaper convenient to wear comprises a diaper body, the diaper body is provided with a surface layer, a flow guide layer, an absorption core layer and a back layer from top to bottom, and the surface layer is made of modified fibers; the preparation process of the modified fiber comprises the following steps: firstly, reacting chloroethylamine hydrochloride with pyridine to produce an intermediate 1, and then substituting a chlorine atom on cyanuric chloride with 2, 2, 6, 6-tetramethyl piperidylamine to obtain an intermediate 2; finally, the intermediate 1 is used for replacing another chlorine atom on cyanuric chloride, an intermediate 3 is prepared, and the intermediate 3 has good antibacterial performance; then, the intermediate 3 reacts with caprolactam to replace the last chlorine atom, and an intermediate 4 is obtained; preparing a polyether amide polymer from the intermediate 4, sebacic acid, 6-aminocaproic acid and polyethylene glycol through a one-step method; the adult diaper prepared by the invention has good antibacterial performance.

Trans-enoyl CoA reductase (TER) enzymes and nucleic acids encoding the same are disclosed. In some cases, the TER enzyme is a non-natural engineered trans-enoyl CoA reductase. Also disclosed are biosynthetic methods and engineered microorganisms that enhance or improve the biosynthesis of 6-aminocaproic acid, hexamethylenediamine, caproic acid, caprolactone, or caprolactam. The engineered microbial organisms include an exogenous TER, and in some cases also include an engineered TER.

The invention relates to a method for preparing aminocaproic acid, which comprises the following steps: S1, adding organic acid into caprolactam waste liquid, and carrying out reflux reaction to obtain a first product; s2, dehydrating the first product under reduced pressure, and adding the dehydrated first product into an alcohol solvent for dissolving to obtain a second product; performing first filtration on the second product to obtain first filtrate; s3, adding organic amine or introducing ammonia gas into the first filtrate, adjusting the pH value of the first filtrate to 7-8, and then carrying out second filtration to obtain crude aminocaproic acid; wherein the waste liquid of caprolactam prepared by the rearrangement method is selected from at least one of waste liquid of caprolactam prepared by a sulfuric acid liquid-phase rearrangement method and waste liquid of caprolactam prepared by a sulfuric acid gas-phase rearrangement method. According to the method, the problem of environmental pollution caused by the waste liquid is solved, valuable components are extracted and converted into the high-added-value product aminocaproic acid, and the adverse effect of hydrochloric acid serving as a catalyst on the product is solved.

The invention relates to the technical field of polyamide fishing lines, and discloses a low-elongation polyamide fishing line and a preparation method thereof.The low-elongation polyamide fishing line comprises a polycaprolactam oligomer and a thermoplastic elastomer, and the polycaprolactam oligomer is prepared from, by weight, 1-1.4 parts of caprolactam, 0.5-0.8 part of 6-aminocaproic acid, 6-0.9 part of adipic acid and 10-15 parts of water; the reinforcing body is prepared from the following raw materials in parts by weight: 0, 3 to 0.7 part of polyethylene glycol, 0.7 to 0.99 part of tetrabutyl titanate, 0.2 to 0.6 part of pentaerythritol, 0.4 to 0.8 part of m-phenyl bisoxazoline, 0.1 to 0, 3 parts of an antioxidant 168 and 0.2 to 0.4 part of an antioxidant 1010. According to the fishing line, the polyethylene glycol, the tetrabutyl titanate, the pentaerythritol, the m-phenyl bisoxazoline, the antioxidant 168 and the antioxidant 1010 are added into the polycaprolactam oligomer, so that the strength of the polyamide is improved, the toughness of the polyamide is reduced, and the situations that the fishing line is pulled, the fishing line is extended and the strength of the fishing line is reduced in the using process of the fishing line are avoided.

The invention relates to the field of organic synthesis, in particular to a preparation method of 6-aminocaproic acid. The method comprises the following steps: hydrolyzing caprolactam by using potassium salt as alkali to obtain 6-aminocaproic acid potassium salt, acidifying by using organic acid to obtain 6-aminocaproic acid and organic potassium salt, and finally recrystallizing by using the solubility difference of the organic potassium salt and 6-aminocaproic acid in an alcohol solvent to obtain high-purity, high-content and high-stability 6-aminocaproic acid. The preparation method does not need special equipment, is simple to operate, reduces the production cost, and is easy for industrial production.

The invention relates to a 6-aminocaproic acid preparation method, which comprises: S1, carrying out first dehydration on caprolactam waste liquid, and carrying out high temperature polymerization to obtain a polymer; adding an acid solution into the polymer, and carrying out reflux depolymerization to obtain a first product; s2, dehydrating the first product under reduced pressure, and adding the dehydrated first product into an alcohol solvent for dissolving to obtain a second product; performing first filtration on the second product to obtain first filtrate; and S3, adding organic amine or introducing ammonia gas into the first filtrate, adjusting the pH value of the first filtrate to 7-8, and carrying out second filtration to obtain crude 6-aminocaproic acid. According to the method disclosed by the invention, the cost of directly treating the caprolactam waste liquid as wastewater is saved, effective substances in the caprolactam waste liquid can be extracted, and aminocaproic acid is synthesized.