Method for preparing crystalline salicin from salicaceae plants

A salicin and plant technology, applied in the field of plant extraction, can solve problems such as explosion, easy environmental pollution, consumption, etc., and achieve the effects of low production cost, no environmental pollution, and high yield

Inactive Publication Date: 2011-04-20
吴韬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of producing crystalline salicin with organic reagents is relatively high, and it takes about 40-50 tons of reagents to produce 1 ton of salicin
On the other hand, organic solvents are flammable, explosive, and easy to pollute the environment after leakage
So far, there has been no report on the industrial production of high-content crystalline salicin by water extraction technology

Method used

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  • Method for preparing crystalline salicin from salicaceae plants

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Grind 100kg of harvested willow branches and leaves into 20 meshes, mix in 5% quicklime; soak and extract the mixed raw materials in water for 3 times, each time for 1 hour, and combine the extracts; filter the extracts with a membrane device with a molecular weight of 5000 Impurities were removed; the membrane permeated liquid was collected and concentrated until the specific gravity was 1.10, placed at room temperature for crystallization, and 1.2 kg of crystals were obtained, the crystal content of which was 65% as detected by high performance liquid chromatography.

[0013] Extraction methods using water as a solvent include soaking, percolation and heating under reflux.

[0014] Membrane equipment includes microfiltration or ultrafiltration membrane equipment, and its membrane pore size ranges from 1,000 Daltons to 1 million Daltons according to molecular weight, and from 10 nanometers to 1 micron according to particle size.

[0015] Microfiltration membrane or ult...

Embodiment 2

[0017] Embodiment 2: 100 kg of poplar branches and leaves harvested are crushed into 20 orders, mixed with 5% quicklime; the mixed raw materials are soaked in water and extracted 3 times, each time for 1 hour, and the filtrate is combined; The equipment is used to filter and remove impurities; the membrane permeate is collected and concentrated to obtain 1.5 kg of crystals, which are concentrated to a specific gravity of 1.15 crystals, and the crystal content is 67% as detected by high performance liquid chromatography.

Embodiment 3

[0018] Embodiment 3: The branches and leaves of Populus euphratica harvested are crushed into 20 meshes, mixed with 5% quicklime; the mixed raw materials are soaked and extracted 3 times, each time for 1 hour, and the filtrate is combined; the filtrate is processed by a membrane device with a molecular weight of 50000 Filter to remove impurities; collect the membrane permeate and concentrate until the specific gravity is 1.20 to crystallize to obtain 1.6 kg of crystals, the crystal content of which is 70% as detected by high performance liquid chromatography.

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Abstract

A method for preparing crystalline salicin from salicaceae plants takes branches or leaves of salicaceae plants as raw materials and comprises the following steps: pulverizing the raw materials and adding quicklime; extracting the mixture by using water as the solvent; filtering the extract by a membrane device; concentrating the membrane permeate liquid to obtain a specific gravity of 1.10-1.20; allowing to stand for white crystal precipitation; washing by water or ethanol; drying to obtain crystalline salicin. Compared to the prior art, the present invention performs the extraction by using water as the solvent; achieves the advantages of low production cost, high yield, less three wastes and no environmental pollution; and is applicable to large-scale and industrial production.

Description

Technical field: [0001] The invention relates to a large-scale production process for purifying and preparing high-content crystalline salicin from extracts of Salicaceae plants, belonging to the technical field of plant extraction, in particular to a method for preparing crystals from Salicaceae plants. Background technique: [0002] Salicin (salicin; salicoside) is also known as salicin, salicin. 1g is soluble in 23ml of water, 3ml of boiling water, 90ml of ethanol, soluble in alkali solution, pyridine and glacial acetic acid, insoluble in ether and chloroform. Naturally present in the branches and stems of Salicaceae plants. In the European market, salicin is mainly used as a dietary supplement and weight-loss food. In the cosmetics industry, it is used to relieve skin redness, remove aging cutin, and inhibit acne. Adding it to shampoo can reduce dandruff. The market demand is huge. [0003] Salicin has been detected from a variety of Salicaceae plants such as: [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H15/203C07H1/08
Inventor 吴韬陈漫霞
Owner 吴韬
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