- Preparation method of plant growth regulation compound sodium nitrophenolate
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The invention relates to the field of preparation of agricultural auxiliaries, in particular to a preparation method of plant growth regulation compound sodium nitrophenolate. According to the invention, acetyl chloride is adopted to replace acetic anhydride which is a precursor to serve as a protecting group for hydroxyl acetylation, so that the acquisition difficulty of process raw materials is reduced, and the production cost of 5-nitroguaiacol sodium salt is controlled; and besides, a phase transfer catalyst is applied to the hydrolysis reaction of 5-nitroacetyl guaiacol, so that the hydrolysis of the product can be effectively promoted, the yield of the hydrolysis reaction is greatly improved, and the overall yield of the 5-nitroguaiacol sodium salt is further improved. The prepared 5-nitroguaiacol sodium salt has the advantage of low cost, and as a main effective component of the compound sodium nitrophenolate, the 5-nitroguaiacol sodium salt can improve the market competitiveness of the compound sodium nitrophenolate product, avoid the behavior that the drug effect of the compound sodium nitrophenolate product is reduced due to the fact that the cost of the 5-nitroguaiacol sodium salt is high and the ratio is reduced by bad manufacturers, and make contribution for promoting the benign development of the market.
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Paragraph 0025-0087
(2021/08/06)
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- CHEMICAL ACTINOMETRY IN THE UV RANGE BASED ON THE PHOTOHYDROLYSIS OF 3,4-DIMETHOXYNITROBENZENE
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Photochemical hydrolysis of 3,4-dimethoxynitrobenzene in aqueous potassium hydroxide leading to the formation of 2-methoxy-5-nitrophenolate anion is routinely used for the determination of UV light intensity.The quantum efficiency of the actinometric system is independent on the excitation wavelength (254, 313, 365 nm) and reaches the value of 0.116+/-0.002 in 0.5 M-KOH.The light intensity determination is based purely on UV/VIS spectral absorption data.A photokinetic model is presented for the reaction which is generally applicable for any photochemical system with the involvement of inner filtration due to products and partial light absorption.The evaluation of primary spectral data is performed by numerical integration of the photokinetic equation.
- Pavlickova, Libuse,Kuzmic, Petr,Soucek, Milan
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p. 368 - 374
(2007/10/02)
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