Preparation method of anhydrous sodium potassium carbonate_Industrial additives

Background and Overview^{[1 Carbon Black]}

The chemical formula of anhydrous sodium potassium carbonate is: KNaCO3 Relative molecular mass: 122.10 English name: Sodiumpotassiumcarbonate, which is a white powder that is easily soluble in water. The solution is strongly alkaline and is often used as a flux. It can be regarded as The product obtained by replacing two hydrogen atoms in the H2CO3 molecule with one potassium atom and one sodium atom at the same time.

Preparation^[1]

Anhydrous sodium potassium carbonate can be used to prepare herbicides. Examples of its applications are as follows: It can be used to prepare solid soluble forms of sulfonylurea herbicides. Bensulfuron herbicide has the characteristics of high herbicidal activity, broad herbicidal spectrum and strong selectivity. When applied to the soil and absorbed into the roots and leaves of weed plants, it can inhibit the synthesis of side chain amino acids and inhibit acetolactate. In the synthesis of enzymes, dipropylene glycol butyl ether prevents cell division, inhibits the growth of shoot tips and roots, and promotes the death of weeds, while cereal crops can metabolize it into inactive substances and continue to grow, so it is particularly suitable for weeding in wheat fields. Bensulfuron soluble powder contains raw materials by weight: 1~50% bensulfuron, 30~75% urea, amine fertilizer or a mixture of urea and amine fertilizer, 6~25% sodium lignosulfonate, 11~33% free Aqueous sodium potassium carbonate, anhydrous sodium potassium bicarbonate or a mixture of anhydrous sodium potassium carbonate and anhydrous sodium potassium bicarbonate. Easily soluble in water, water-insoluble matter <1%, stable in hot and cold storage, not affected by factors such as uniformity during spraying, dryness and humidity of the soil, etc., increasing the chance of pesticide penetration and absorption, achieving good weeding effects while saving money Dosage and reduce local phytotoxicity caused by drug accumulation. Auxiliary materials can provide nitrogen and potassium fertilizers needed for plant growth, and can be formulated into specifications of 5%, 10%, 20%, and 25%.

Main reference materials

[1] CN02132891.9 Bensulfuron soluble powder and its preparation method