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 Posted: Tue 23:12, 21 Dec 2010 Post subject: air jordan shoes cheap SF-FR flame retardant inter |
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SF-FR flame retardant intermediate (benzene dichloride) Synthetic Methods
Laboratory-developed synthetic differential fiber flame retardant. Polyester fibers for a good flame-retardant effect of non-laser, compared with other flame retardants. Have to add less. Smoke suppression. Non-toxic, high efficiency and so on .... But the station into SF - FR important in the body of benzene dichloride asked no such domestic product. Small scale dichlorobenzene phosphine used by chlorination, and then after the oxidation of sulfur dioxide by side enamel, this method requires oxygen - carbon tetrachloride and sulfur dioxide and other dangerous chemicals,[link widoczny dla zalogowanych], and Liaoning to produce acid and other sulfur dichloride by-product. The SF-FR flame retardant industry encountered obstacles. Dichlorobenzene synthesis of direct oxidation of benzene phosphonic dichloride success of the Prince, completely solve the problem, so SF - FR into industrial production, the product has also been put on the market, and some exported to Germany, the Philippines and other countries. 2 Experimental 2.1 Reagents dichlorobenzene Prince: Home, E 97 degrees catalyst; benzene phosphonic acid (homemade),[link widoczny dla zalogowanych], Hw agent, carbon tetrachloride (AR), charcoal (granular) La Cage good Ying to the testis Snake Che stem Bei date of receipt of item 199 ~ - 04-04rJ1 ��, �� Xi \ production Zhou Qingdao University section of a magnetic volume 2.2 l1 dichlorobenzene December synthesizing benzene dichloride Synthesis of the reaction is as follows : OICl-P-CLC BU _ a P-cl �� �� �� Department by the reaction (1) can be seen, the reaction of oxygen atoms only received a phosphorus atom, so that the trivalent phosphine phosphorus into a five-dichlorobenzene price of benzene phosphorus dichloride. Reaction is a simple process of weight gain, weight changes by the reactant response can reflect changes in speed and productivity, which is with the use of liquid chromatography analysis is consistent. * Reactor; with a magnetic stirrer, round bottom flask, three 1:1 mouth of catalyst were 1:1 and thermometer inserted in the outlet with a reflux condenser IZI, flask with oil bath under temperature control. Preserved dichloride benzene ring i IR spectra of benzene Kids in a 160lIo1201ooa06OlOPPM 2 Kids in the access sheath dichloride, respectively, a quantitative magnetic resonance spectra of the benzene ring hydrazine acid, Hw agent, carbon tetrachloride and carbon added to the DCB technique phosphine in oxygen in a flask in the 16 - Chi Chuan: SF-FR flame retardant intermediate (benzene dichloride) units into a method of reaction, and in 1hr, 2hr, 3hr, 4hr, 5hr, when the sample to measure the reactant 6hr benzene dichloride in the content, and with the reaction without catalyst were compared. 2.3 reaction products of instrumental analysis will eventually be further refined,[link widoczny dla zalogowanych], respectively, Hitachi 27O 50 infrared spectrophotometer and a BRUKER Ac company a 80FTNMR spectrometer for structural analysis. From infrared spectra (Figure 1), nuclear magnetic resonance spectrum (Figure 2), and benzene dichloride the Sadtler standard spectra are consistent. L�� month that the direct oxidation can be of high purity, high yield of benzene dichloride. 3 Results and discussions will be without the catalyst and acid were added benzene bladder,[link widoczny dla zalogowanych], Hw agent, carbon tetrachloride, charcoal as a catalyst in the oxidation process are numbered 0,1,2,3,4. After one hour per reaction reactants measured benzene dichloride in the amount of Taiwanese listed in the Annex. From the end of the reaction yield can be seen that the reaction without catalyst yields lower,[link widoczny dla zalogowanych], while in a small amount of catalyst, the production rate of a different time than the schedule of products in each reactant concentration 730S568185085951243768593857761o4l69797O75u697U0948085829l large increase, which especially in benzene bladder catalyst for a good photo. However, benzene phosphonic acid also need to be synthesized, and the cost is higher. Therefore, as a catalyst to Hw agent is more appropriate. Of course, the added amount of catalyst, reaction temperature, the proportion of other factors also affect the reaction rate and yield, not discussed here. Schedule gives the yield obtained under optimum conditions is the result. 4 Conclusion (1) Preparation of the direct oxidation of benzene dichloride as the improvement of the original synthetic route is feasible, but also in industrial production does not produce any \(2) add the catalyst in the case, the direct oxidation can get a higher yield of benzene bladder dichloride. Especially benzene phosphonic acid as a catalyst and agent for the HW Sheng good. References 1 National production, learning and research project \.196 g, 39 (g) :2138-2139 of a l7
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