Production method of sodium phenoxyacetate
A technology of sodium phenoxyacetate and production method, applied in chemical instruments and methods, preparation of carboxylate, preparation of organic compounds, etc., can solve problems such as reducing the conversion rate of raw materials, difficulty in purifying sodium phenoxyacetate, etc., to reduce impurities amount, inhibiting hydrolysis, and improving the effect of the production process
Inactive Publication Date: 2017-02-15
枣阳市福星化工有限公司
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[0002] The conversion rate of the sodium phenoxyacetate produced by the existing production method of sodium phenoxyacetate has only about 70%, and the main reason is that the hydrolysis of raw material chloroacetic acid not only reduces the conversion rate of raw material, but also in the obtained phenoxyacetic acid A large amount of impurities are added to the sodium, making it difficult to purify sodium phenoxyacetate
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[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0012] See figure 1 , figure 1 It is a structural schematic diagram of a production method of sodium phenoxyacetate provided by the invention. A kind of production method of sodium phenoxyacetate comprises the steps:
[0013] In step S1, the raw materials were weighed according to the following parts by weight: 38% of chloroacetic acid, 50% of water; the chloroacetic acid was dissolved in water, and the temperature of the chloroacetic acid solution was lower...
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An embodiment of the invention discloses a production method of sodium phenoxyacetate. The production method comprises steps as follows: (1), raw materials including 38 parts by weight of chloroacetic acid and 50 parts by weight of water are weighed, chloroacetic acid is dissolved in water, and a chloroacetic acid solution is cooled to 0 DEG C; (2), a saturated sodium carbonate solution is added to the chloroacetic acid solution during stirring at the temperature of 0 DEG C until the pH value of the solution is 7-8; (3), 26 parts by weight of phenol and 50 parts by weight of water are added to the mixed solution, a 35% sodium hydroxide solution is added until the pH value is 12, and the mixed solution is heated to 92 DEG C and subjected to a reaction for 0.5 h; (4), the mixed solution is subjected to suction filtration, solids obtained through filtration are washed and dried, and required sodium phenoxyacetate is obtained. The original production technology is improved, by the aid of a simple measure of cooling, hydrolysis of chloroacetic acid is effectively inhibited, the yield of sodium phenoxyacetate is increased, the quantity of impurities in sodium phenoxyacetate is greatly reduced, and the difficulty in purification and impurity removal of a sodium phenoxyacetate product is reduced.
Description
technical field [0001] The present invention relates to a kind of preparation method of chemical product, relate in particular to a kind of production method of sodium phenoxyacetate. Background technique [0002] The conversion rate of the sodium phenoxyacetate produced by the existing production method of sodium phenoxyacetate has only about 70%, and the main reason is that the hydrolysis of raw material chloroacetic acid not only reduces the conversion rate of raw material, but also in the obtained phenoxyacetic acid A large amount of impurities are involved in the sodium, making it difficult to purify sodium phenoxyacetate. Therefore, reducing the hydrolysis of chloroacetic acid is an important means to improve the output and product quality of sodium phenoxyacetate. Contents of the invention [0003] The technical problem to be solved by the embodiments of the present invention is to propose a production method for sodium phenoxyacetate in view of the low conversion ...
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IPC IPC(8): C07C51/367C07C59/70
CPCC07C51/367C07C59/70
Inventor 赵顺阳
Owner 枣阳市福星化工有限公司