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Method of separating wool acid and lanonol from wool grease

A technology of lanolin and lanolin, applied in the preparation of steroids, chemical instruments and methods, separation/purification of carboxylic acid compounds, etc., can solve problems such as poor quality of lanolin, consumption of recycled solvents, large solvent loss, etc., and achieve reduction Solvent loss, reduced solvent recovery energy consumption, and high separation efficiency

Inactive Publication Date: 2008-06-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem with this type of method is that the quality of lanolin obtained is poor, and it is not easy to directly crystallize sterol compounds with high value from it.
However, the main disadvantage of this method is that a large amount of solvent is used, which not only consumes a lot of solvent, but also consumes more energy to recover the solvent.

Method used

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  • Method of separating wool acid and lanonol from wool grease

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 200 grams of lanolin crude product and 400 milliliters of 0.2% ethanol solution by weight into a 1000 ml three-necked flask equipped with a thermometer, a condenser and a stirrer. After stirring at 60° C. for 2 hours, the mixture was allowed to stand still and separated into layers. After separating the water, add 30 grams of solid sodium hydroxide (technical grade) and 500 milliliters of ethanol (technical grade). Stirring was started after the temperature was raised to 60°C, the stirring was stopped after the temperature was maintained for 2.0 hours, and most of the solvent was distilled off by changing the reaction device to a distillation device. The residue was dried at 105°C for 2 hours, and about 220 g of solid saponified product was obtained after cooling. Get 22 grams of this saponified product in an extractor, add 20 milliliters of 80% ethanol solution (extractant) containing 20% ​​volume water. At 40°C, the extraction-extraction coupling operation is ca...

Embodiment 2

[0025] Add 200 grams of crude lanolin and 400 milliliters of an aqueous solution containing 0.2% OP-10 into a 1000 ml three-necked flask equipped with a thermometer, a condenser and a stirrer. After stirring at 80° C. for 2 hours, the mixture was allowed to stand still and separated into layers. After separating the water, add 50 grams of solid potassium hydroxide (technical grade) and 500 milliliters of methanol (technical grade). Stirring was started after the temperature was raised to 60°C, the stirring was kept at this temperature for 3.0 hours, and the reaction device was changed to a distillation device to evaporate most of the solvent. The residue was dried at 105°C for 2 hours, and about 240 g of solid saponified product was obtained after cooling. Get 22 grams of this saponified product in the extractor, take 95% methanol solution containing 5% volume water as extractant, 95% methanol saturated C 6 -C 8 Petroleum ether is used as the extractant. At 5°C, the flow ra...

Embodiment 3

[0027] The lanolin crude product pretreatment and saponification reaction are the same as in Example 1. With the 85% methanol solution that contains 15% volume water as extractant, the toluene that 85% methanol is saturated is extractant, at 25 ℃, extractant flow rate 6ml / min, extractant flow rate 3ml / min carries out the same as embodiment 1 Coupling operation, operating time 1.5 hours to separate lanolin and lanolin (soap), obtain respectively 6 grams of light yellow lanolin and 11.5 grams of light gray wool soap, and wool soap is acidified to obtain lanolin.

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Abstract

The process of separating lanolin fatty acid and lanolin alcohol from lanolin includes the following steps: 1. washing coarse lanolin product with water solution of surfactant; 2. saponification of washed lanolin product in alcohol solution; 3. extracting in serial extractors with different extractants, alcohol solvent and benzene, alkane or alkyl halide, to separate out lanolin fatty acid soap and lanolin alcohol from the saponified matter; and 4. evaporating to eliminate solvent to obtain lanolin alcohol in high quality, drying the extractant residue to obtain white lanolin soap, and acidifying the lanolin soap to obtain lanolin fatty acid. The present invention is simple, low solvent and extractant consumption and low power consumption, and the obtained lanolin fatty acid and lanolin alcohol have high quality and may be used further in producing lanolin fatty derivative.

Description

technical field [0001] The invention relates to a method for separating lanolic acid and lanolin in lanolin. Background technique [0002] Lanolin is a natural substance secreted by sheep's sebaceous glands. The crude lanolin recovered from the wool scouring wastewater of the wool spinning industry is a brown sticky substance with a specific smell. Calculated according to the total wool output, more than 250,000 tons of crude lanolin can be recycled in the world every year. my country is a big country in wool production, import and processing, and more than 10,000 tons of lanolin can be recycled a year. But at present my country's crude lanolin is mostly purchased by foreign companies except for a small part of refined lanolin used as medicine or used in the cosmetics industry. Zhejiang and Jiangsu provinces are major wool processing provinces, and there are hundreds of wool washing and processing enterprises in the two regions. Some of the large-scale wool scouring enter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/74C07C27/02C07J75/00C07C51/42
Inventor 朱京科许菲菲符迈进
Owner ZHEJIANG UNIV