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Method for extracting chlorogenic acid

A technology of chlorogenic acid and phase separation method, which is applied in the field of medicine and chemical industry, can solve the problems of small adsorption capacity and poor adsorption effect, and achieve the effect of easy operation and simple process

Inactive Publication Date: 2009-12-16
INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the resin adsorption effect that this invention selects is poor, and this is because chlorogenic acid belongs to polyhydric phenolic acid, contains polar groups such as hydroxyl, phenolic carboxyl in its molecular structure, and whole molecule is medium weak polarity, and for non- Polar resin (such as HPD-100, HPD-300), its adsorption capacity is small

Method used

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  • Method for extracting chlorogenic acid

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Effect test

Embodiment 1

[0022] a. Water extraction: Eucommia leaves are pretreated and dried at 45°C to 65°C for 5-6 hours. The samples were crushed to 40-60 mesh. Use water as the extraction solvent, solid-to-liquid ratio = 1:10, extract 3 times at 65°C, 45min / time, and filter.

[0023] b. Pass through the column: the filtrate obtained in step a is adjusted to pH2, put on a 306-type macroporous resin column, the flow rate is 2ml / min, eluted with 70% ethanol, and the eluent is concentrated;

[0024] c. Extraction: adjust the pH of the concentrated solution obtained in step b to 2, add ethyl acetate for extraction.

[0025] d. Phase separation: add petroleum ether to the extract obtained in step c, which is 40% of the volume of the extract, fully mix, and collect the lower aqueous phase;

[0026] e. Recrystallization: the aqueous phase obtained in step d is crystallized, recrystallized, and vacuum-dried to obtain the finished product of chlorogenic acid.

[0027] The purity of the sample can reach ...

Embodiment 2

[0029] a. Water extraction: honeysuckle pretreatment, at 45°C to 65°C, dry for 5-6 hours; crush the sample to 40-60 mesh; use water as extraction solvent, solid-liquid ratio = 1:10, 65°C, 45min / time, Extract 3 times and filter.

[0030] b. Pass through the column: the filtrate obtained in step a is adjusted to pH 1, put on the XAD-6 type macroporous resin column, the flow rate is 2ml / min, elute with 70% ethanol, and the eluent is concentrated;

[0031] c. Extraction: adjust the pH of the concentrated solution obtained in step b to 1, add ethyl acetate for extraction.

[0032] d. Phase separation: add chloroform to the extract obtained in step c, which is 40% of the volume of the extract, fully mix, and collect the lower aqueous phase;

[0033] e. Recrystallization: the aqueous phase obtained in step d is crystallized, recrystallized, and vacuum-dried to obtain the finished product of chlorogenic acid.

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Abstract

The invention relates to a method for extracting chlorogenic acid, which belongs to the technical field of pharmaceutical chemicals. The method combines macroporous resin enrichment, ethyl acetate extraction and a mixed solvent split-phase method to achieve multi-step gradient purification of the chlorogenic acid so as to obtain a chlorogenic acid product with high purity. The method comprises the processes of water extraction, column passing, extraction, phase splitting and recrystallization. The macroporous resin adopted by the column passing process is 306 type or XAD series resin; and the split-phase agent adopted by the split-phase method is petroleum ether, chloroform or the mixture of the petroleum ether and the chloroform. The method is applicable to the process of extracting and preparing the chlorogenic acid from honeysuckles, cortex eucommiae leaves and cortex eucommiae barks.

Description

technical field [0001] The invention relates to a method for extracting and purifying chlorogenic acid from eucommia leaves, honeysuckle flowers or bark of eucommia, belonging to the technical field of medicine and chemical industry. Background technique [0002] Chlorogenic acid is a depsipolic acid composed of caffeic acid and quinic acid. It is also known as coffee tannic acid, and its chemical name is 3-O-caffeoylquinic acid. It is produced by plants through the shikimic acid pathway during aerobic respiration. A phenylpropanoid compound. With strong pharmacological effects, it is the main active ingredient of antibacterial and detoxifying, anti-inflammatory and choleretic for many medicinal materials (such as honeysuckle, capillary, Eucommia, etc.) and Chinese patent medicines (such as Fuganning, Shuanghua injection, acne oral liquid). It is an important index for the quality control of certain traditional Chinese medicine preparations. In addition, chlorogenic acid h...

Claims

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Application Information

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IPC IPC(8): C07C69/732C07C67/48C07C67/56C07C67/58
Inventor 李雄辉胡居吾熊伟季清荣
Owner INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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