31 results about "Dimercaprol" patented technology

The invention discloses a thiosulfate silvering additive, a preparation method thereof and electroplate liquid containing the same. The thiosulfate silvering additive comprises 12-18 g / L of lauryl sodium sulfate, 3-5 g / L of polyethylene glycol, 10-13 g / L of nitrogen mustard, 5-10 g / L of cumin, 250-350 g / L of 1,10-phenanthroline monohydrate, 50-100 g / L of dimercaprol dimercaptopropanol, 50-100 g / Lof mercaptoethylamine, 100-150 g / L of ethylene glycol tetraacetic acid (EGTA) and the balance water. The additive provided by the invention enables the dispersity, the stability and the electroplatingperformance of the electroplate liquid to be quite remarkably improved, the pH value does not need to be adjusted repeatedly in the electroplating process, meanwhile, the performance including the smoothness, the adhesive force, the glossiness, the anti-tarish performance and the like of a silvering coating are remarkably improved, the thickness of the coating is further reduced, and phenomena such as fracturing do not exist; and the electroplate liquid provided by the invention does not contain cyanide, the mirror surface of the coating is bright, small in brittleness, good in adhesive force, flat in surface, bright, good in anti-tarish performance and high in heat resistance, application to the multiple fields of decorative electroplating, functional electroplating and the like can be achieved, preplating is not needed, and the bonding force can also be guaranteed.

The invention discloses 4,4'-dimercaprol azobenzene and a preparation method thereof and relates to an azo sulfhydryl compound. The molecular formula of the 4,4'-dimercaprol azobenzene is HS(C6H4)N=N(C6H4)SH. The method comprises the following steps of: dissolving aniline into an aqueous sodium bicarbonate solution; adding I2 for reacting, then decompressing and pumping off the solvent to obtain 4-m-iodoaniline; dissolving the 4-m-iodoaniline into glacial acetic acid, adding NaBO3-4H2O and H3BOs for reacting, and then recrystallizing by using THF (Tetrahydrofuran) to obtain 4,4'-azobenzene diiodide; dissolving the 4,4'-azobenzene diiodide into the THF, adding an obtained mixed solution to magnesium chips in batches, and then cooling to obtain an azobenzene Grignard reagent; adding solid sulphur powder to the azobenzene Grignard reagent in batches and heating for reacting to obtain a vulcanized product; cooling and then adding an NH4Cl solution; acidizing by using hydrochloric acid and extracting through dichloromethane; combining organic phases, drying and filtering; decompressing to evaporate out the solvent to obtain a crude product; and extracting by using alcohol, and evaporating the solvent to dryness to obtain a product.

The invention relates to the field of pharmaceutical preparation, and particularly discloses sodium fusidate freeze-dried powder injection and a preparation method thereof. The sodium fusidate freeze-dried powder injection disclosed by the invention is prepared from sodium fusidate, dimercaprol dimercaptopropanol, erythorbic acid, cysteine hydrochloride, phenylalanine, arginine and injection water in a freeze-drying manner. Preferably, the arginine, the dimercaprol dimercaptopropanol, erythorbic acid, cysteine hydrochloride and phenylalanine are taken as auxiliary materials of the sodium fusidate freeze-dried powder injection; stable performance of the sodium fusidate freeze-dried powder injection is improved by synergistic effect; the content of related substances is reduced; the characters of a product are maintained in a normal requirement; and safe use and long-term storage of clinical drugs are facilitated.

The invention discloses a polyepoxy group epoxy resin and a preparation method thereof. The method puts the raw materials allyl glycidyl ether and 2,3-dimercapto-1-propanol in a reactor, and adds a photoinitiator and a solvent, and reacts 1-12 under ultraviolet light irradiation in an ice-water bath hour; then add isocyanate compound to the above reaction solution and react at 65°C for 0.5 to 24 hours, remove the solvent after the reaction, and vacuum dry to obtain a polyepoxy epoxy resin. The preparation method provided by the invention is simple and efficient, the reaction conditions are mild, and the synthesis process is environmentally friendly.

The invention discloses an antibacterial and flame-retardant modified glass glue, which comprises the following raw materials in parts by weight: 46-51 parts of a diamino flame-retardant monomer, 76-84 parts of a diacid chloride-based monomer, and tetramethylammonium fluoride 13-14 parts, 18-20 parts of 2,3-dimercapto-1-propanol, 8-10 parts of triethylamine, 26-29 parts of toluene diisocyanate, 4.8-4.9 parts of silver nitrate solution with a concentration of 10 mg / g , appropriate amount of water. The glass glue prepared by the present invention is solid and easy to carry. When in use, the silver thiol is precipitated to form an ion complex through the deprotonation of triethylamine and then can be dissolved to form a viscous colloid, which can then be used directly. It solves the problem that the existing glass glue is a colloidal body, needs to be sealed and stored, and is easy to condense when it is not used up after opening, thereby affecting its bonding performance.

The invention relates to a method for measuring the content of a magnesium element in an aluminum alloy. A compound masking reagent adopts a triethanolamine solution of iminodisuccinic acid, dimercaprol and tetrasodium glutamate diacetate, and triethanolamine reacts with Al<3+> and Fe<3+> to obtain a stable complex under an acidic environment, the formed complex is colorless and easily soluble, the iminodisuccinic acid and Cu<2+>, Ca<2+> and Zn<2+> form a stable complex; tetrasodium glutamate diacetate is strong in complexing power with rare earth element ions; dimercaprol is strong in complexing power with nickel and manganese ions, and is poor in complexing power with other ions. Thus, the compound masking reagent formed by multiple components is used for performing complexing masking on each element except for the manganese ions in the aluminum alloy in a targeted manner, and thus the detection accuracy is improved. The method for measuring the content of the magnesium element in the aluminum alloy, provided by the invention, is accurate in measuring result, and remarkable in end point, and has the environmental-friendly effects in the used reagent without pollution.