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Cyanuric chloride production process and application profile


The mouth of the situation. In 1992 China imported cyanuric chloride 2361,8 tons,[link widoczny dla zalogowanych], 360 tons of exports, and imports of 1,644.5 tons in 2001, exports of 9059.5 tons. Yingkou three domestic enterprises to levy chemical sodium cyanide are used as the representative of France, after several years of continuous improvement, production technology has been optimized. Tail gas recovery in the special bag used to improve the yield of the product, waste treatment process using sodium hypochlorite-product recovery and reduce production costs. Domestic production enterprises of cyanuric chloride in the chemical plant in Yingkou triad, Siping 4t-F pilot plant, Tonghua Chemical Plant, Shanghai Dyestuff Chemical nine plants, Zibo hotels 4t-F plants, dye plants Zhaoyuan Chemical Plant, Hebei Guan Ping chemical plants,[link widoczny dla zalogowanych], more than 20. Yingkou three of which levy the largest chemical plant, after the transformation of the current 7 expansion of production capacity has reached 20,000, accounting for about 75% of national output. Other manufacturers scale of 500 tons / year, and most are produced for own use, for the development of deep processing of downstream products. Third, in the industrial production of cyanuric chloride used in industrial production of pesticides herbicides, fungicides and triazine pesticides, the pharmaceutical industry for the synthesis of hydrazino-s-triazine, sulfur, amide-triazine, etc.; the dye industry for the production of goods reactive dyes, direct dyes, metal complex dyes, acid dyes, disperse dyes and vat dyes or chemical additives industry for the production of optical brighteners, antioxidants, lubricants, additives and textile help agent, cellulose dehydration, precipitation and gel paper fabric treatment. The current consumption of cyanuric chloride composition for the production of triazine pesticides in 74% of total consumption, followed by the production consumes 13% of fluorescent brightener, dye production and consumption of 8%. The application is its main aspects to be introduced. 1. Weeding is the production of cyanuric chloride Yu-triazine herbicides key intermediate, extensive use of herbicides, with herbicidal effect, selective, broad spectrum herbicide, low toxicity and low residue and so is our focus the development of varieties. Cyanuric chloride such products by the three chlorine atoms are amines, alcohols, phenols, mercaptans, etc. derived replaced, due to more active two chlorine atoms, so if only to be replaced by a chlorine atom, controlling the reaction conditions, the temperature control in a 15-0 ~ C, was the equivalent of the presence of acid binding agent to react. The second of three chlorine atoms to replace the required temperature to 20 -. 60 (2 in response to the presence of acid binding agent. That the chlorine atoms of cyanuric chloride was replaced by different substituents have different products can be obtained. The synthesis of atrazine as an example, first three PVC cyanide dissolved in a solvent, in the 0 ..- 5 ~ C conditions and equimolar reaction of ethylamine in the presence of sodium bicarbonate, and then raising the temperature to 40 ~ (about 3, and isopropylamine in the presence of the role of sodium bicarbonate To get the product. currently widely used products of atrazine, ametryn,[link widoczny dla zalogowanych], herbicides to pass, cyanazine, Diquat net, killing net grass, licorice-chun, cover Kusatsu, grass, etc. II + a few of Jin varieties. 2. dyestuff industry is the synthesis of cyanuric chloride acid melamine core intermediate type of direct dyes, dye molecules in these three nitrogen benzene nucleus is a spacer and the chromophore molecule is composed of two a combination of amino monomer dye formed. synthetic reactions mainly consists of three parts, one of two synthetic azo dyes containing amino groups, and second, cyanuric chloride with two azo dyes containing amino groups and one secondary condensation; third polyol amine or aromatic amine with cyanuric chloride condensation of the third. important species have direct light yellow 3GN, direct copper Green 13,[link widoczny dla zalogowanych], Direct Green 59, CI Direct Yellow 3GC,[link widoczny dla zalogowanych], direct resistance drying green L, direct light green 5GLL and so on. 3. fluorescent whitening Jing cyanuric chloride is mainly used for synthesis of double-triazine amino stilbene fluorescent brighteners, such brighteners increase due to higher self-strength, good application performance and the appropriate light fastness and stability of the peroxide bleaching has been widely used, such brighteners by the DSD acid and 2mol 1mol of the condensation of cyanuric chloride, in the order of aromatic and 2mol amines, fatty amines, cyclic amine or alkoxy condensation in the system. The main varieties are fluorescent whitening agent UBO, JD-3 and BR. and so on. Fourth, the proposed 'after nearly 20 years of development, China's industry of cyanuric chloride has begun to take shape. and has formed a 3 million ton / year production capacity, but because of all the traditional production of sodium cyanide, there is a long process, material consumption and high waste volume and other shortcomings, which restrict the cyanuric chloride development. it is recommended that manufacturers and research agencies to optimize existing processes and develop new technology, expand production scale equipment. loss of force should also develop downstream products, driving product demand and to seize the opportunity to join after the pioneering WTo international markets, and enhance the international competitiveness of products.
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