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Modified cottonseed oil oxidation Sulfited Fatliquor Preparation and properties of

* 39 * flail coconut Bo Shan Shan Norway ∞ iv iv a I_. 10 Shu-u】 \ 0 volume in China Leather 36 unsaturated fat trans C = C c-H bond of the stretching vibration absorption peak, and with the deepening of oxidation, the absorption peak increased. This is because, for v ... strength is concerned, the more symmetric molecule, the weaker its strength. Natural fats are mostly unsaturated olefinic bond cis-structure, in the oxidation process, when the o-methylene double bond 0 【a CH: H on the CH-COOH into oxide, the structure of the single asymmetric allylic increased. Diene and polyene structure, easily lead to the generation of cis double bonds shift the structure of an anti-conjugated double bonds,[link widoczny dla zalogowanych], while in the heat and oxidation process, the cis-structure into a stable conformation of trans. In the vicinity of 2925cm and 2854eln, the absorption peak broadens, but also saturated methyl ot-CH, the CH-H CH-COOH into evidence. (2) 1780cm nearby, along with the deepening of fat oxidation, the absorption peak broadening, a certain increase in peak area, which is due to the decomposition of peroxides in an OOH, the occurrence of secondary oxidation reaction to produce aldehydes, ketones,[link widoczny dla zalogowanych], and carboxyl acid, which led to C = 0 stretching vibration (1) t = Oh (2) t = 2h, POV = 125mmol/kg (3) t = 6h, POV = 382mmol/kg Figure 6 esterification product of oxidation of cottonseed oil in the infrared spectral properties of Table 1 Comparison of experimental fatliquoring Figure 7 is a product of cottonseed oil by esterification of the oxidation of sulfuric acid after the infrared spectra. 1160-1300Cm the emergence of a broad absorption peak interval, which is based on acid S = 0 asymmetric stretching vibration and glycerol in the C 101 C stretching vibration absorption peak (about 1160cm) overlap with the results. At 1045cm at a moderate intensity appears new absorption peak for the acid base on the symmetric S = 0 bond stretching vibration absorption peak, corresponding to 615cm c-s appearing in the stretching vibration absorption peak,[link widoczny dla zalogowanych], indicating that the introduction of sulfur oil molecules acid group. 1739cm Department for ester C = 0 absorption peak,[link widoczny dla zalogowanych], 1711cm sulfosuccinate at the structure for the carboxylate C = 0 absorption peak. Figure 7, the product of oxidation of sulfite 2.4 IR spectra of sulfated product of the oxidation of fat increases the performance of sulfated products in the oxidation of fat increases the performance test in accordance with the literature [2] method, the results in Table 1o The results showed that adding fat , 50% cottonseed oil alcoholysis degree of latex modified Fatliquor better stability and added fat. 3 Conclusions (1) alcoholysis of cottonseed oil and the ester oxidation level of sulfite reaction conditions that affect the performance of combined fatliquor key factor. 40 * test confirmed that the appropriate level of alcohol solution should be controlled at about 50%, oxidation temperature 75-80 ~ C, oxidation time of 6h or so. (2) infrared spectrum in the oil by esterification of the introduction of molecules prone to sulfite reaction of maleic anhydride in the molecular backbone structure and improve the fatliquor affinity with the leather fibers; further by oxidation Asia After the reaction of sulfuric acid in the fat molecules in the active introduction of sulfonic groups to improve the emulsifying properties Fatliquor fat and processing results. (3) The process route designed, easy to operate, oxidation by air oxidation, the production is no \Agent from the oil fat emulsion stability radical,[link widoczny dla zalogowanych], grease effect.