基于差异硫酸化率的脂肪醇醚硫酸盐制备

doi:10.3969/j.issn.1001-1803.2021.08.004

Abstract

Abstract:

The products of fatty alcohol ether sulfates （AES） with different sulfation degree were obtained by sulfation of fatty alcohol ethers （AEO） with sulfur trioxide in a falling film sulfonator. The components in the products and their changes with sulfation degree were determined by measuring the content of anionic active substance, AEO and inorganic acid, combined with the hydroxyl value of AEO and gas quality analysis. The content of 1,4-dioxane in the products with different sulfation degree was analyzed by headspace gas chromatography. The results show that the AEO with low addition number of oxyethylene group has the priority of sulfation. Dodecanol and dodecyl polyoxyethylene ether react with sulfur trioxide more easily than tetradecanol alcohol and tetradecyl polyoxyethylene ether. The average addition number of polyoxyethylene groups in AEO can be adjusted by controlling the different sulfation degree and thus the distribution of oxyethylene groups in AEO can also be further regulated and narrowed. The content of 1,4-dioxane increases with the increase of sulfation degree.

Key words: fatty alcohol polyoxyethylene ether, sulfur trioxide, falling film sulfonator, sulfation degree, 1;4-dioxane

CLC Number:

TQ423

Li Jianbo,Li Jiyun,Li Ping,Yang Xiaoyi,Guo Chaohua,Ren Xiaodan. Preparation of fatty alcohol ether sulfates with different sulfation degree[J].China Surfactant Detergent & Cosmetics, 2021, 51(8): 719-724.

Figures/Tables 6

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References 13

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样品	硫酸化率/%	脂肪醇醚硫酸酯含量/%	游离AEO含量/%	无机酸含量/%
5-AES-9	4.5±0.03	5.1±0.03	96.5±0.12	0.1±0.05
15-AES-9	14.9±0.02	16.6±0.02	88.4±0.18	0.1±0.03
20-AES-9	18.6±0.04	20.6±0.04	83.3±0.16	0.1±0.03
25-AES-9	23.0±0.02	25.3±0.02	78.6±0.15	0.1±0.04
30-AES-9	27.4±0.04	29.9±0.04	74.4±0.13	0.2±0.04

样品	羟值/ （KOH mg·g^-1）	平均分子量	氧乙烯基团平均加合数
AEO9	96.2±0.08	583.2±0.5	8.9±0.01
5-AES-9	83.3±0.06	673.2±0.5	10.9±0.01
15-AES-9	79.6±0.08	704.8±0.7	11.7±0.02
20-AES-9	89.3±0.07	628.0±0.5	9.9±0.01
25-AES-9	87.0±0.06	644.8±0.4	10.3±0.01
30-AES-9	84.4±0.09	664.6±0.7	10.7±0.02

组分	样品
组分	5-AES-9	15-AES-9	20-AES-9	25-AES-9	30-AES-9
十二醇	58.0±0.12	22.9±0.13	31.6±0.09	28.9±0.11	30.9±0.13
十四醇	87.9±0.14	66.5±0.14	58.7±0.12	46.1±0.14	53.5±0.11
12-AEO1	76.3±0.11	67.6±0.11	57.2±0.11	58.1±0.11	67.1±0.13
14-AEO1	96.0±0.12	89.8±0.13	69.0±0.16	67.1±0.13	70.0±0.15
12-AEO2	82.2±0.13	68.9±0.09	53.7±0.12	55.9±0.15	69.9±0.12
14-AEO2	98.5±0.17	91.9±0.17	66.6±0.11	62.7±0.12	66.4±0.16
12-AEO3	73.3±0.11	64.0±0.12	49.9±0.16	52.2±0.12	63.3±0.12
14-AEO3	99.5±0.14	92.4±0.16	61.1±0.10	54.2±0.11	64.2±0.11
12-AEO4	79.2±0.12	63.3±0.13	47.7±0.12	50.5±0.17	60.7±0.15
14-AEO4	99.9±0.18	93.7±0.10	70.1±0.12	67.9±0.12	78.6±0.14
12-AEO5	79.8±0.14	65.6±0.11	48.0±0.15	60.2±0.16	71.2±0.10

Preparation of fatty alcohol ether sulfates with different sulfation degree

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