窄分布脂肪醇聚氧乙烯醚的合成研究

doi:10.3969/j.issn.1001-1803.2019.03.007

Abstract

Abstract:

KOH and a homogeneous catalyst were respectively used in the syntheses of fatty alcohol polyoxyethylene ether （AEO） with two degrees of polymerization of ethylene oxide （EO）. The theoretical EO degrees was caculated with EO consumption. The product composition was analysed by gas chromatography. The EO distribution of these two kinds of AEO and effects of EO degrees on molecular weight distribution were studied. The results show that in the gas chromatogram of narrow-distribution AEO, the peak area of C₁₂（EO）₇ is very small and the chromatographic peak of C₁₄（EO）₇ is barely observable. As to conventional AEO and narrow-distribution AEO, the mass fraction of free fatty alcohol in AEO₂ is lower than in AEO_1.85, and the total mass fraction of components with EO degrees 1~4 is slightly higher in AEO₂ than in AEO_1.85. On the other hand, the mass fraction of free fatty alcohol and components with EO degrees above 4 are significantly lower in narrow-distribution AEO than in conventional AEO, while the mass fraction of components with EO degrees 1~4 are much higher in narrow-distribution AEO than in conventional AEO. The components of narrow-distribution AEO show Poisson distribution, indicative of an obvious characteristic of narrow distribution.

Key words: fatty alcohol polyoxyethylene ether, narrow distribution, degree of polymerization of EO

CLC Number:

TQ423

Jing-cheng TIAN,Yong-qiang SUN,Jian-guo GUO. Synthesis of fatty alcohol polyoxyethylene ether with narrow distribution[J].China Surfactant Detergent & Cosmetics, 2019, 49(3): 174-177.

Figures/Tables 5

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References 16

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样品		羟值/（mgKOH/g）		平均EO加合度
样品		理论	实际	理论	实际
常规	AEO₂	200	200.67	2.00	1.99
常规	AEO_1.85	205	204.86	1.85	1.86
窄分布	AEO₂	200	199.73	2.00	2.02
窄分布	AEO_1.85	205	205.00	1.85	1.85

组分	w/%
	AEO₂		AEO_1.85
	常规	窄分布	常规	窄分布
脂肪醇	36.84	24.25	38.07	25.39
C_12/14（EO）₁	22.16	17.91	21.33	18.78
C_12/14（EO）₂	17.11	22.22	16.01	22.13
C_12/14（EO）₃	10.95	19.56	10.72	18.62
C_12/14（EO）₄	6.18	10.61	6.53	10.03
C_12/14（EO）₅	3.45	3.76	3.69	3.52
C_12/14（EO）₆	1.74	0.95	2.04	0.88
C_12/14（EO）₇	0.67	0.17	0.89	0.18
合计	99.10	99.43	99.28	99.53

Synthesis of fatty alcohol polyoxyethylene ether with narrow distribution

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