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Method for preparing persimmon tannin from persimmon

The technology of persimmon and extraction tank is applied in the field of preparation of persimmon tannin, which can solve the problems of no industrialized production, high raw material price of gallnut, and high production cost of tannic acid, and achieves low extraction process cost, significant comprehensive economic benefits, and equipment. The effect of easy maintenance

Inactive Publication Date: 2009-12-30
WUFENG CHICHENG BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The market demand for tannic acid products produced with Chinese gallnut as raw material and South American tara as raw material is increasing year by year. Due to the high price of gallnut raw materials, the production cost of tannic acid enterprises is too high
Preparation of tannic acid from persimmon, but there is no report on industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 1 kg of immature fresh persimmons with a green color and astringent taste, wash and remove the stains on the skin of the persimmons, crush them with a crusher or press them with an industrial press, add 1 kg of persimmons to distill and soak for 24 hours to soften the persimmons, and use a 300W ultrasonic wave to soften the persimmons. In the extraction tank, the ultrasonic time is 15 minutes, and the ultrasonic frequency is 27000HZ. The material liquid filtered by the extraction liquid is sent to the evaporation system to make a concentrated liquid. The concentrated liquid has a Baume degree of 18°Bé. Dry under the condition of vacuum 150pa, obtain powdery persimmon tannin 0.2kg.

[0021] The purity of the product is 5% and the yield is 20% according to the analysis and measurement by ultraviolet spectrophotometry.

Embodiment 2

[0023] Weigh 1 kg of immature fresh persimmons with a green color and astringent taste, wash and remove the stains on the skin of the persimmons, crush them with a crusher or press them with an industrial press, add 1 kg of distilled water to soak for 24 hours to soften the persimmons, and use a 300W ultrasonic wave to soften the persimmons. In the extraction tank, the ultrasonic time is 23 minutes, and the ultrasonic frequency is 29000HZ. The material liquid filtered by the extraction liquid is sent to the evaporation system to make a concentrated liquid. The concentrated liquid has a Baume degree of 18°Bé. Dry under the condition of vacuum 150pa, obtain powdery persimmon tannin 0.22kg.

[0024] The purity of the product is 5.5% and the yield is 22% according to the analysis and measurement by ultraviolet spectrophotometry.

Embodiment 3

[0026] Weigh 500kg of immature fresh persimmons with a green color and astringent taste, wash and remove the stains on the skin of the persimmons, crush them with a crusher or press them with an industrial press, soak them in 500kg of distilled water for 24 hours to soften the persimmons, and use a 1500W power ultrasonic wave to soften the persimmons. Extraction tank, the ultrasonic time is 20 minutes, the ultrasonic frequency is 28000HZ, the material liquid filtered by the extraction liquid is sent to the evaporation system to make a concentrated liquid, the concentrated liquid is at a Baume degree of 18°Bé, and the concentrated liquid is vacuumed at a temperature of 80°C by a spray dryer. Dried under the condition of 150pa to obtain 118kg of powdery persimmon tannin.

[0027] The purity of the product is 5.7% and the yield is 23.6% according to the analysis and measurement by ultraviolet spectrophotometry.

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Abstract

The invention discloses a method for preparing persimmon tannin from persimmon, which comprises the following main processes: cleaning and screening persimmons, squeezing the persimmons into juice, then extracting the juice by ultrasonic wave, and concentrating and drying the extract to obtain a tannin product. The method for preparing the tannin does not need high temperature during the production, carries out ultrasonic reinforced extraction, does not destroy effective components which are easy to hydrolyze or have oxidation property, reduces energy consumption at the same time, and has good safety and simple and feasible operation during normal pressure extraction; equipment is convenient to maintain; and the best extraction rate can be obtained by the ultrasonic reinforced extraction for about 20 minutes. The method prepares the tannin by using the persimmons with low cost to replace gallnut as a main raw material, greatly reduces the raw material cost, and has remarkable comprehensive economic benefit.

Description

technical field [0001] The invention relates to a method for preparing persimmon tannin, in particular to a method for preparing persimmon tannin from persimmon by using ultrasonic technology. Background technique [0002] Tannic acid is an important food additive and pharmaceutical intermediate with broad application prospects. The market demand for tannic acid products produced with Chinese gallnut as raw material and South American tara as raw material is increasing year by year. Due to the high price of gallnut raw materials, the production cost of tannic acid enterprises is too high. There is no report on industrial production of tannic acid prepared from persimmon. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for producing persimmon tannin from persimmon by using ultrasonic technology. Since the tannin obtained in the present invention is obtained from persimmon as the main raw material, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H13/08C07H1/08
Inventor 陈赤清毛业富陈清龙冯运洋
Owner WUFENG CHICHENG BIOTECH
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