脂肪酸甲酯乙氧基化物过滤工艺研究

doi:10.3969/j.issn.1001-1803.2022.03.005

摘要/Abstract

摘要：

研究了钙系催化剂制备的脂肪酸甲酯乙氧基化物（FMEE）的过滤工艺,测定了FMEE凝胶相区和不同温度时的黏度,考察了吸附剂种类、吸附剂用量、助滤剂种类、助滤剂用量、滤纸目数对过滤效果的影响。结果表明：FMEE在20 ℃、质量分数为50%±5%时存在凝胶相区;随温度升高,质量分数为80%的FMEE黏度降低;吸附剂柠檬酸用量为溶液质量的0.1%时,吸附效果较优;助滤剂硅藻土用量为溶液质量的0.2%时,过滤效果最优;滤纸目数为500时,过滤时间及一次过滤收率均衡最优。在优化工艺条件下,可以得到钙离子含量低于10 mg/kg的澄清透明溶液。

关键词: 脂肪酸甲酯乙氧基化物, 吸附剂, 助滤剂, 过滤, 粒度分布

Abstract:

In this paper, the filtration process of FMEE prepared by calcium catalyst was studied. The viscosity of FMEE at different temperatures and gelation phase region of FMEE were measured, and the effects of sorbent type, dosage of adsorbent, types of filter aids, amount of filter aid and number of filter paper on the filtration effect were investigated. The optimal process was confirmed by filtration time, pH after filtration, particle size distribution and calcium ion content. The results show that FMEE has gel phase, which is serious with the mass fraction of 50%±5% at 20 ℃. When the mass fraction is 80%, the viscosity of FMEE decreases with the temperature increase, and the inflection point is at 70 ℃. When the adsorbent is citric acid and the mass fraction in the solution is 0.1%, the adsorption effect is better. When diatomite is used as the filter aid and the mass fraction in the solution is 0.2%, the filtration effect is the best. When the mesh number of filter paper is 500, the primary filtration yield reaches the maximum. Under the optimized process conditions, a clear and transparent solution with calcium ion content less than 10 mg/kg can be obtained, and the turbidity of filtrate can be less than 1 NTU.

Key words: fatty acid methyl ester ethoxylate, adsorbent, filter aid, filtration, particle size distribution

中图分类号:

TQ423

董振鹏,田威. 脂肪酸甲酯乙氧基化物过滤工艺研究[J]. 日用化学工业, 2022, 52(3): 258-262.

Dong Zhenpeng,Tian Wei. Study on purification and filtration process of fatty acid methyl ester ethoxylate[J]. China Surfactant Detergent & Cosmetics, 2022, 52(3): 258-262.

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参考文献 13

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吸附剂种类	温度/ ℃	过滤时间/ min	过滤效果
活性炭	70	30	滤液浑浊
白土	70	30	形成滤饼,滤液浑浊
磷酸	70	50	少量气泡,滤液浑浊
草酸	70	50	黄色透明液
聚丙烯酰胺	70	60	形成滤饼,滤液浑浊
柠檬酸	70	20	滤饼较黏,滤液澄清
空白	70	120	滤饼较黏,滤液浑浊

w（吸附剂）/ %	滤液pH （5%水溶液）	滤液离子含量/ （mg/kg）	过滤时间/ min
1	3.7	6.46	20
0.8	3.9	10.21	30
0.5	4.09	18.69	38
0.3	4.9	20.62	50
0.2	5.0	29.35	60
0.1	5.2	39.40	80
0.08	5.2	50.62	90
0.06	6.0	80.08	110
空白	7.9	1 327	120

助滤剂种类	w（助滤剂）/ %	滤液离子含量/ （mg/kg）	过滤时间/ min
硅藻土	0.1	5.26	6
	0.2	4.21	4
	0.3	3.69	10
珍珠岩	0.1	12.24	7
	0.2	10.62	6
	0.3	7.28	10
纤维素	0.1	16.46	9
	0.2	10.21	8
	0.3	8.69	15

滤纸目数/mesh	目数对应微米/μm	滤液离子含量/（mg/kg）	过滤时间/min	一次过滤收率^A/%
200	75	9.45	3	70
300	48	9.16	3	86
400	38	8.87	4	90
500	25	4.21	4	92
1 000	13	3.62	6	93
5 000	2.6	2.88	10	94