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Monochloroacetic Acid Production Method

Shandong Minji Chemical Co.,Ltd | Updated: May 10, 2017

Monochloroacetic acid is a chemical substance, the formula is C2H3ClO2.

Made of polypropylene woven bag lined with double plastic bag. In the transport process should prevent direct sunlight, (rain, etc.) damp, packaging damage. Should be stored in a cool, ventilated and dry place, away from the fire, heat, should be with the oxide, alkali, flammable and other items stored separately. At room temperature shelf life of one year, the summer temperature should not be long-term storage.

Monochloroacetic acid Uses:

Monochloroacetic Acid Chloroacetic acid for dyes, pharmaceuticals, pesticides, resins and other organic synthesis intermediates. Dye industry for the production of indigo dye pharmaceutical industry for the synthesis of caffeine, barbiturates, adrenaline, vitamin B6, amino acid; pesticide industry for the manufacture of dimethoate, herbicides, 2,4-D-butyl ester, 4,5 a T, thiocyanate acetic acid, naphthalene acetic acid and so on.

Monochloroacetic acid production methods:

Production of chloroacetic acid

Domestic chloroacetic acid production using intermittent chlorination method, that is, chlorine and acetic acid as raw materials, sulfur as a catalyst, chlorination, crystallization, filtration, centrifugation and other processes were chloroacetic acid products. The method has the advantages of simple process, less investment and easy operation control.

Red phosphorus, sulfur or iodine catalyzed:

CH3CO2H + Cl2 → ClCH2CO2H + HCl

There are basically two methods of producing chloroacetic acid abroad. First, acetic acid chloride chlorination reaction, the Monochloroacetic Acid United States and Canada to use this route. Another way is trichlorethylene with sulfuric acid hydrolysis, using this route mostly for Western European countries. Continuous method and intermittent chlorination compared to the following three advantages of a device size sophomore production technology advanced, high quality product is less pollution and less.

Industry development

Production Strategy of Chloroacetic Acid Production

Enterprises should first plan the development strategy to determine the main products and the main business, and then rational allocation of production and R & D strength. The development of new products to the principle of clear positioning, Monochloroacetic Acid can not pursue short-term benefits and affect the status of business principal yuan business. Enterprises only do first in the final strong to be bigger. Although the temptation to diversify business, but companies should avoid the phenomenon of more and more non-strong.

Chloroacetic acid in the sales process, it is necessary to do the information mentioned earlier feedback timely work, while constantly expanding the market. At the same time, domestic enterprises should also look at the international market, and actively expand exports, according to the characteristics of export countries to respond flexibly to obtain the largest market share and the best sales revenue.

Preparation method editor

Vinyl chloride, chloroacetyl chloride hydrolysis, trichlorethylene hydrolysis, chloroacetylene, tetrachlorethylene, glycerol, dichloroacetate, trichloroacetaldehyde, chloroethanol oxidation, ketene oxidation and Acetic acid catalytic chlorination method more than 10 kinds of industrial production methods are trichlorethylene hydrolysis, chloroacetyl chloride and acetic acid catalytic chloride three. 

Laboratory method:

300 g (5 mol) of glacial acetic acid and 15 g (0.14 mol) of acetic anhydride were placed in a 500 ml three-necked round bottom flask. In the oil bath heated to 105 degrees Celsius, began to slowly pass chlorine. During the entire chlorination process, the oil bath temperature clock is maintained between 108-112 ° C. Chlorine gas after a few minutes after the start of the reaction, acetic acid in the yellow color (due to dissolved chlorine caused by) immediately faded, and the release of hydrogen chloride. At this time can greatly improve the speed of chlorine access, but the bottle is not yellow chlorine gas escaped degrees. Chlorination reaction takes about 10 hours. 5 g of acetic anhydride was added to the reaction every 2 hours, and the end point of the reaction was significantly reduced by escaping hydrogen chloride or determined by the melting point of the sample taken. When the crude chloroacetic acid sample has a melting point of 45-50 ° C, the passage of chlorine is stopped. The melted reactants were transferred to a distillation flask and a small amount of the fractions were distilled off. The fractions with a boiling range of 186-188 ° C were collected and condensed to form a chloroacetic acid having a strong odor. The yield was 425 g. Yield 90%. Chloride can also be used as a catalyst chlorinated chloride derived. Equation: CH3COOH + Cl2 ------- ClCH2COOH + HCl (acetic anhydride as catalyst)


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