三聚氰胺包合法分离不饱和脂肪酸

doi:10.3969/j.issn.0253-2417.2019.02.017

Abstract

Abstract:

Separation of unsaturated fatty acids (UFAs), including monounsaturated (MUFAs) and polyunsaturated fatty acids (PUFAs) from mixed fatty acids (FAs) by melamine inclusion method were investigated. Effects of melamine/FAs mass ratio, crystallization inclusion temperature and inclusion time on yield, purification, and inclusion rate of UFAs were discussed. The melamine inclusion complex was characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) and nuclear magnetic resonance (NMR) spectroscopy. Results showed that saturated fatty acids (SFAs) could be employed to form the inclusion crystallization (complex) in ethanol at low temperature by melamine. The optimized conditions were FAS 20 g, 95% ethand 96 mL, mass ratio of melanine and FAs (M/F) 0.9:1, dissolving at 75 ℃, inclusion at 9 ℃ for 7 h. Under these conditions, the maximum UFAs (yield of 60.83%, purity of 93.75%, and inclusion rate of 87.23%) were obtained. Compared with the ureainclusion method, the purity and inclusion rate of UFAs were higher, and MUFAs and PUFAs could be separated together from SFAs by melamine inclusion method. Compared with melamine crystals by structural analysis, the crystal structure of melamine inclusion complex with SFAs did not change, and SFAs could enter into melamine crystalline lamellae to form stable crystalline inclusion complex. After inclusion, melamine could be recycled, which would be promoted the further development of fatty acids separation.

Key words: fatty acids, separation, melamine inclusion method

CLC Number:

TQ35
TQ645

Peiyan WANG,Yuanbo HUANG,Shouqing LIU,Zhifeng ZHENG,Delu NING. Separation of Unsaturated Fatty Acids by Melamine Inclusion Method[J]. Chemistry and Industry of Forest Products, 2019, 39(2): 115-121.

Figures/Tables 7

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References 21

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%
样品 samples	棕榈酸 (C₁₆:0)palmitic acid	硬脂酸 (C₁₈:0)stearic acid	油酸 (C₁₈:1)oleic acid	亚油酸 (C₁₈:2) linoleic acid	亚麻酸 (C₁₈:3) linolenic acid	纯度 purity	得率 yield	包合率 inclusion rate
原料material	24.90	9.72	35.19	26.33	3.86	65.38	—	—
尿素包合法urea inclusion method	6.92	15.14	25.35	46.62	5.97	77.94	60.50	72.11
三聚氰胺包合法melamine inclusion method	4.68	1.57	50.62	37.79	5.34	93.75	60.83	87.23

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Separation of Unsaturated Fatty Acids by Melamine Inclusion Method

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