Purification method of oak bowl extract

A technology of rubber tannin extraction and purification method, which is applied in chemical treatment of small hide/big hide/leather/fur, small hide/big hide/leather/fur treatment, tanning treatment, etc. The impact of the production of tannin extract and the underutilization of rubber resources, etc.

Inactive Publication Date: 2016-02-17
GUANGXI FORESTRY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although rubber extract has a wide range of uses, due to its own nature, the amount of use in many aspects is limited, resulting in a greater impact on the output of rubber extract, and many rubber resources have not been fully utilized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 200g of the crushed rubber bowl raw material, put it into a 1000ml beaker, add clear water (tap water) according to the solid:liquid ratio of 1:2.5, place it in a water bath for heating and extraction, and extract the liquid once every 2 hours, and extract six times in total ( The first and second extraction temperatures are 60-70°C, the third and fourth extraction temperatures are 70-80°C, the fifth and sixth extraction temperatures are 80-90°C), the six extractions are combined and placed in In a plastic bucket, get 2600g of leachate (containing 2.2% of dry matter), add 0.46g of polyacrylamide and stir well, let it stand for 18 hours to remove the precipitate, and place the solution on a rotary evaporator to evaporate and concentrate to 14.3% of dry matter.

[0021] Take by weighing 200g of the cooled concentrated solution and put it into a beaker, add 14.3g of acetone solution with a mass concentration of 60% and stir evenly, then pour it into a centrifuge tube ...

Embodiment 2

[0024] Take by weighing 400g of broken rubber bowl raw material, put into 2000ml large beaker, carry out leaching process by embodiment 1. Combine the six extracts and place them in a plastic bucket, add 1.1g of polyacrylamide and stir well, let stand for 18 hours to remove the precipitate, and place the solution on a rotary evaporator to evaporate and concentrate to 13.8% dry matter.

[0025] Take by weighing 300g of the cooled concentrated solution and put it into a beaker, add 20.7g of acetone solution with a mass concentration of 60% and stir evenly, then pour it into a centrifuge tube and cover it, then place it in a centrifuge, set the speed at 3000r / min, Centrifuge for 12 minutes, pour the upper layer solution back into the beaker (discard the precipitate), then add 20.7g of acetone solution with a mass concentration of 85%, stir well, pour it into a centrifuge tube, place it in a centrifuge and centrifuge at the original set speed for 12 minutes, Pour out the upper lay...

Embodiment 3

[0028] Weigh 50g of powdered oak extract (manufactured by Guangxi Baise Forest Chemical Factory, tannin content 70.6%) into a beaker, add 500ml of water, heat to 60-70°C in a water bath, stir to dissolve, cool to room temperature Add 0.4g of polyacrylamide and stir well, let it stand for 24 hours to remove the precipitate, add 25g of acetone solution with a mass concentration of 60% to the solution and stir well, then pour it into the centrifuge tube and cover it, put it into the centrifuge, and press the speed of 3000r / min Centrifuge for 12 minutes, pour out the upper layer solution, then add 25 g of acetone solution with a mass concentration of 85% to the mixed solution and stir evenly, pour the mixed solution into a centrifuge tube, place it in a centrifuge and centrifuge at the original speed for 12 minutes, and pour out the upper layer solution After heating and recovering acetone on a rotary evaporator, cool to room temperature, pour the solution into a chromatographic co...

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PUM

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Abstract

The invention discloses a method for purifying Valonia tannin extract. The method adopts Valonia or Valonia tannin extract as a main raw material, and comprises the following main process routes of adding water in the Valonia and heating for extraction or adding water in the Valonia tannin extract and heating to dissolve the Valonia tannin extract, flocculating and settling by using a chemical reagent polyacrylamide, treating by using an organic solvent (performing the treatment on acetone solutions with low concentration and high concentration in two times), passing through a chromatography column and drying, thereby obtaining a finished product. By adopting the method, such impurities as non tannin in the Valonia tannin extract can be effectively removed, the tannin content of the obtained purified finished product of Valonia tannin extract is high than 80% and the yield is higher than 80% as well.

Description

technical field [0001] The invention belongs to the technical field of deep processing of rubber extract, in particular to a method for purifying rubber extract. Background technique [0002] Oak bowl is the species name of the fruit shell of the oak plant, which is rich in tannin. As a wild tanning plant, it is widely distributed in most parts of my country. Oak extract is produced from rubber extract, which can be collected and used every year without affecting the growth and use of trees. The output is large, the resource is rich and renewable, and it has long been the main raw material for extract in my country. The tannins contained in oak extracts belong to hydrolyzed tannins, mainly composed of chestnut ellagitin, sweet chestnut ellagitin, chestnut nitrate, sweet chestnut ellagitin, oak ellagitin, isorubber ellagitan and Composition of sweet chestnut, non-tannin contains flavanols, gallic acid and sugars. Rubber bowl extract is mainly used for leather tanning agent,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/12
Inventor 常新民陈海燕周丽珠李桂珍梁忠云何春茂秦荣秀
Owner GUANGXI FORESTRY RES INST
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