3 results about "Picloram" patented technology

The invention provides a fritillaria tissue culture medium, a preparation method, a fritillaria tissue culture method and application, and belongs to the technical field of plant tissue culture. It is found for the first time that low-concentration picloram can achieve efficient browning resistance of fritillary callus; compared with the prior art, the formula of the fritillaria tissue culture medium has the advantages that the browning resistance efficiency is remarkable, healthy proliferation of calluses is synchronously promoted, and the contradiction that'browning inhibition 'and'growth promotion' are difficult to consider at the same time in a traditional fritillaria tissue culture method is solved. The method is suitable for various fritillaria such as fritillaria unibiacteata, bulbus fritillariae cirrhosae and bulbus fritillariae thunbergii, and has universality and industrialization prospects.

The invention relates to a method for preparing 3, 4, 5, 6-tetrachloropicolinic acid from picloram solid residues. The method comprises the following steps: dissolving picloram solid residues which take 6-amino-3, 4, 5-trichloropicolinic acid and 4-amino-3, 5, 6-trichloropicolinic acid as main components as raw materials in 1, 4-dioxane or other solvents, adding concentrated nitric acid to carry out N-amino nitration, then adding thionyl chloride to carry out sealed heating chlorination, and carrying out post-treatment to obtain 3, 4, 5, 6-tetrachloropicolinic acid. According to the method, picloram solid residues are converted into production raw materials with practical application value, diazotization operation in a traditional method is avoided, and the method has the advantages of being safe and mild in reaction, easy to operate, green and economical.