Study On Synthesis Of Chloropicrin From Nitromethane And Its Refining Process

The organic agrochemicals is a type of organic compound that was synthesized by artificial to kill harmful living wound and to regulate plant growth develops, have no machine agrochemical include natural mineral at inside, can directly use to kill wound harmful living creature.Chloropicrin, so called trichloronitromethane, nitrochloroform, belonging to organic agrochemical, is a kind of organic agrochemical, mainly used to kill insects, disinfect, put out a rat, food smoked steam etc. It was also pretty much obvious effect to protect the vegetable, melons and fruits. It can disinfect effectively for soil and prevent soil from spreading a disease harming. Because it has strong incitement to the person and urges a tears function, it can also protect used people. So it is a kind of very popular Soil fumigant.Chloropicrin is the traditional support product to Dalian Dyestuff Company Limited, its market demands stable, always create good economic efficiency for the company. It had been produced from picric acid method many years. Its craft is mature, the cost is low, nevertheless the waste water has great capacity and discard a residue not easily to manage, pollution of the environment is so heavy, which do not agree with to match economy energy reduce a row and keep on the basic national policies of development. In order to work out this problem, we developed the craft based on nitromethane to produce chloropicrin. Nitromethane was synthesized from dimethyl sulfate. Emissions of discarding were reduced, labor cost was reduced and production efficiency was raised in this processing.The starting material, nitromethane was considered in this thesis. The best conditions to give nitromethane by dimethyl sulfate were researched firstly. Secondly, synthesis of chloropicrin was studied deeply. The best conditions were found out. The qualified product was got. Finally the refine of Chloropicrin was carried on. The worthy basic data and emollient technique support was provided to company to produce the qualified chloropicrin.