Enrichment of nervonic acid in <i>Acer truncatum Bunge</i> oil by combination of two-stage molecular distillation, one-stage urea complexation and five-stage solvent crystallization

Yingxi Gao; Jiayi Shi; Jie Wang; Fan Zhang; Shichao Tian; Zhiyong Zhou; Zhongqi Ren

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Enrichment of nervonic acid in Acer truncatum Bunge oil by combination of two-stage molecular distillation, one-stage urea complexation and five-stage solvent crystallization

Full Length Article | Updated：2026-01-06

- Enrichment of nervonic acid in Acer truncatum Bunge oil by combination of two-stage molecular distillation, one-stage urea complexation and five-stage solvent crystallization
- Chinese Journal of Chemical Engineering Vol. 59, Issue 7, Pages: 61-71(2023)
- Affiliations：
  
  State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology,Beijing,China,100029
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2023
- Accepted：
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oil by combination of two-stage molecular distillation, one-stage urea complexation and five-stage solvent crystallization[J]. 中国化学工程学报, 2023, 59(7): 61-71.
DOI：

oil by combination of two-stage molecular distillation, one-stage urea complexation and five-stage solvent crystallization[J]. 中国化学工程学报, 2023, 59(7): 61-71. DOI：

摘要

Abstract

Nervonic acid is the world's first and only potent substance that can repair damaged nerve fibers and promote nerve cell regeneration with high nutritional value. The wide variety of fatty acids in plant oils and fats with similar structures makes the large-scale separation and purification of high-purity nervonic acid very difficult. A new combined process of molecular distillation

urea inclusion and solvent crystallization was established to prepare high-purity nervonic acid with the mixed fatty acids obtained after saponification and acidification of

Acer truncatum Bunge

oil as raw materials. First

according to the difference in the mean free path of fatty acids

molecular distillation was used to separate and remove C16 saturated fatty acid of palmitic acid and four C18-C20 fatty acids of stearic

oleic

linoleic

and linolenic acids. The content of C16-C20 fatty acids decreased from 72.92% to 19.22% after two-stage molecular distillation processes

in which the contents of saturated fatty acid of palmitic acid decreased to about 0.5%. Then

according to the difference in carbon chain length and saturation of fatty acid

the

contents of C22-C24 saturated fatty acids of tetracosanoic and docosanoic acids decreased to 0.21% and 0.07% by urea inclusion with urea/free fatty acid preparation by saponification (SPOMFs) ratio as 0.6. In addition

all saturated fatty acids were basically separated. Finally

according to the difference in the solubility of fatty acids in solvents

the C18-C20 unsaturated fatty acids of oleic

linoleic

and linolenic acids and C22 unsaturated fatty acid of erucic acid were removed by solvent crystallization. The content of C18-C20 unsaturated fatty acids decreased to less than 5% with pentanol as the solvent after the first stage solvent crystallization. The content of erucic acid decreased to 3.47% with anhydrous ethanol as the solvent after the second to fifth stage solvent crystallization. The combined process of molecular distillation

urea inclusion and low temperature crystallization innovatively adopted an efficient

simple and easy-to-industrial solvent crystallization method to separate erucic and nervonic acids

obtaining nervonic acid with purity of 96.53% and final yield of 47.99%.

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Related Institution

Engineering Research Center of Preparation Technology of Ultra-Pure Chemicals for Integrated Circuit, Ministry of Education, Beijing University of Chemical Technology

College of Environmental Science and Engineering, Taiyuan University of Technology

Training Base of State Key Laboratory of Coal Science and Technology Jointly Constructed by Shanxi Province and Ministry of Science and Technology, Taiyuan University of Technology

State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University

2 Guangxi Branch of China Academy of Science and Technology Development

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Enrichment of nervonic acid in Acer truncatum Bunge oil by combination of two-stage molecular distillation, one-stage urea complexation and five-stage solvent crystallization

DOI：

摘要

Abstract

关键词

Keywords

references