Sodium diethyldithiocarbamate, also known as accelerator SDC, is a white to yellowish crystalline powder. Soluble in water and ethanol, slightly soluble in benzene and chloroform. It is hygroscopic. It is used as accelerator for natural rubber, styrene-butadiene rubber, nitrile rubber and neoprene rubber. When combined with diethyl ammonium dithiocarbamate, it can be vulcanized at room temperature. It is prepared by condensation of diethylamine and carbon disulfide. The aqueous solution is alkaline and gradually decomposes. Carbon disulfide can be separated when meeting with acid, which makes the solution turbid. It is a special reagent for the determination of copper ion.
Low toxicity, half lethal dose (rat, oral) 2830mg/kg. Sodium diethyldithiocarbamate can inhibit the induction of nitric oxide synthase in macrophages. A spin trap for binding with Fe2+to detect NO in brain, kidney, liver and other tissues. Sodium diethyldithiocarbamate is a copper chelator, which has been used to quantify copper in biomaterials by electron spin resonance and as an inhibitor of peroxidase, ascorbic acid oxidase and other enzymes. Because of its extremely low concentration, it is safe and non-toxic under normal use conditions.
Purification method of hexafluoroisopropanol:
A purification method of sodium diethyldithiocarbamate, the specific preparation steps are as follows:
(1) In a 5000ML glass flask (or beaker), add 1500ML analytical pure anhydrous ethanol, turn on the stirring and heating, add 2kg of industrial diethyldithiocarbamate in batches, and control the temperature to 50-60 ℃ for dissolution;
(2) After complete dissolution, add injectable activated carbon (767 injectable activated carbon), the dosage is 1~2%, keep it for 30 minutes, filter, cool it at room temperature for 12 hours, separate the crystallization, and dry it in the dark at room temperature (25 ℃ - 30 ℃). According to HG/T4016-2008, the content can reach more than 99.5%, and the refining yield is 83%. Other items meet the standards.
Application of hexafluoroisopropanol:
1. CN201910052570.8 discloses the application of sodium diethyldithiocarbamate in the preparation of fungicides for the prevention and control of plant diseases caused by plant pathogenic fungi. The invention has proved that sodium diethyldithiocarbamate has good inhibitory activity against plant pathogenic fungi through the indoor toxicity test. Traditional fungicides cause great environmental pollution and high residue, and directly threaten food safety. Sodium diethyldithiocarbamate is a kind of degradable, pollution-free, environment-friendly small molecule compound, and its drug resistance is poor, and it is safe for non-target organisms, human beings and livestock. It can ensure the high quality of agricultural products, fruits and vegetables, and meet the requirements of sustainable development. Its research and market application prospects are broad.
2. CN201710263468 discloses a method for reducing the heading of Leymus chinensis and promoting the vegetative growth, and relates to a method for promoting the vegetative growth of Leymus chinensis. The invention is to solve the technical problem that the heading rate of Leymus chinensis in mature stage is high and the number of leaves of Leymus chinensis in vegetative growth is small in soda saline-alkali land at present. By spraying sodium diethyldithiocarbamate (DIECA) solution at the best growth period of Leymus chinensis, the invention promotes the tillering and vegetative growth of Leymus chinensis, increases the number of leaves, significantly inhibits the heading rate of Leymus chinensis, significantly improves the nutritional value of Leymus chinensis, and provides a new method for promoting the development of animal husbandry. The invention is applied to the field of grassland science and plant nutrition.
3. CN201210232650 provides a preparation method of tellurium diethyldithiocarbamate. Tellurium diethyldithiocarbamate (TDEC for short) is a sulfuration accelerator of dithiocarbamate. This kind of accelerator is acid accelerator, which has extremely strong accelerating effect and extremely fast curing speed. It is known as "overspeed accelerator". It is usually used for low temperature vulcanization and can give rubber a great constant elongation strength. The process comprises the following steps: removing impurities from tellurium-containing waste through alkali heating and alkali dissolution to obtain alkali metal tellurite solution; Dissolve sodium diethyldithiocarbamate in a buffer solution to obtain a buffer solution containing sodium diethyldithiocarbamate; Add the alkali metal tellurite solution and hydrochloric acid solution to the buffer solution containing sodium diethyldithiocarbamate to make the sodium diethyldithiocarbamate react with the alkali metal tellurite, wherein the buffer solution is one of boric acid - borax solution, borax - disodium hydrogen phosphate solution, and disodium hydrogen phosphate - sodium hydroxide solution; Aging after reaction; Then it is cooled, filtered, washed and dried to obtain tellurium diethyldithiocarbamate. The invention can simplify the process, reduce the production cost, avoid the generation of harmful gases, and have high purity and controllable particle size.