Uses of 2,6-dichlorobenzonitrile

2.6-Dichlorobenzonitrile generally refers to dioxanitrile. It is also used in engineering plastics, electronic materials and dyes.

2.6-Dichlorobenzonitrile is used as a pre-bud herbicide for plants. The product has a low concentration of toxicity to plants, a wide range of weeds control objects, high efficacy and low toxicity. Mainly used for pre-bud weeding of perennial grasses. It is also used in the production of herbicide grass kele. It is mainly used in the production of an important intermediate of herbicides and pesticides, 2.6-difluorobenzonitrile, and is also used in engineering plastics, electronic materials and dyes.

In winter, the temperature is low, and the activities and hazards of pests and diseases are mostly hidden and static. When applying chemical pesticides in winter, in addition to choosing the right pesticides, Guangnong Chemical also pays attention to the following six points.

The first is to choose medicine during sunny and high temperature periods. Because when the temperature is high in winter, the food intake and breathing intensity of pests are greater than those in cold and cold weather, the medicinal liquid is sprayed on the insect body, and more drugs are brought into the body, which is conducive to the poisoning effect.

The second is to increase the dosage appropriately. The lethal dose of pesticides to pests is not constant. The lower the temperature at room temperature, the lower the lethal dose of pests, so it is necessary to appropriately increase the dosage in winter to prevent pests from dying after eating medicine.

Farmers can determine the dosage according to the temperature, but generally not more than 50% of the conventional dosage. When applying pesticides in winter, add water strictly according to the dilution multiple, and do not increase or decrease the amount of water at will.

The third is to reasonably select pesticides suitable for winter application. Under normal circumstances, gastric poisons and contact agents are less affected by temperature, and internal inhalants and fumigants are more affected by temperature. Such as dichlorvos, dichlorvos, digol, methamidophos and other low temperatures will significantly affect the insecticidal effect.

Pesticides such as deltamethrin, phoxim, and stone-sulfur mixture can still exert better insecticidal effects when applied at lower temperatures. When herbicides are used at low temperatures in winter, the effect is displayed much longer than when applied at high temperatures. Therefore, you should wait patiently after applying the medicine. As long as the liquid is sprayed in place, no new spraying is generally required.

Fourth, extend the safety interval of crops. When pesticides are applied in winter, the degradation rate of pesticides will slow down, and the residual recommendation period of pesticides in crops will be relatively prolonged. When controlling diseases and insect pests of vegetable crops in winter, special attention should be paid to extending the safety interval of pesticides to ensure human health.

Fifth, pay attention to the diluted medicine solution water in each bucket. You can add a small packet of "medicine primer" or 15 grams of "vegetable oil" agent, or acidic substances, etc., as an adhesive. But do not add it when applying medicine to vegetables.

The pure product of 2.6-dichlorobenzonitrile is white amorphous crystal, and the industrial product is white or light yellow powder with a slight almond smell. There are many preparation methods for 2.6-dichlorobenzonitrile. 2.6-Dichlorobenzaldehyde oxime is dehydrated, that is, 2.6-dichlorobenzaldehyde oxime is dehydrated by adding a dehydrating agent. After cooling and crystallization, it is precipitated, and then filtered, washed and dried to obtain 2.6-dichlorobenzonitrile. This route is mainly used in my country's production. 2.6-Dichlorotoluene is one-step prepared by ammonia oxidation in the presence of a catalyst. 2.6-Dichlorobenzonitrile. This route greatly shortens the reaction process, reduces pollution, and can be continuously produced, reducing costs. In addition, there are various other synthesis methods, such as 2.6-dichlorobenzaldehyde or 2.6-dichloro-dichlorobenzyl benzyl and hydroxylamine reaction, 2.6-dichloroaniline for diazotization, nitrile reaction, etc., 2.6-dichlorobenzonitrile can be synthesized.