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Method for separating tea pigment from instant tea slagging waste liquid

A technology for discharging slag waste liquid and tea pigment is applied in the field of separating tea pigment, which can solve problems such as waste water pollution and achieve the effect of solving waste water pollution.

Active Publication Date: 2014-04-02
ZHEJIANG MINGHUANG NATURAL PRODS DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a method for separating tea pigment from instant tea slag discharge waste liquid, which not only effectively solves the problem of wastewater pollution, but also produces high value-added tea pigment products, and realizes the transformation of instant tea slag discharge waste liquid. Turn waste into treasure

Method used

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  • Method for separating tea pigment from instant tea slagging waste liquid

Examples

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Effect test

Embodiment 1

[0034] The comprehensive utilization of Assam black tea slag discharge waste liquid has a solid mass fraction of 2.0% and a tea polyphenol mass concentration of 8.0 g / L. Measure 1000L of Assam black tea slag discharge waste liquid into the blending tank, add ascorbic acid to make the mass fraction 0.3%, fully dissolve, pump the slag discharge waste liquid through the heat exchanger, make the temperature of the feed liquid reach 65 °C, and then Filter through a 200-mesh sieve to remove impurities and obtain slag discharge waste liquid. Pump the slag discharge waste liquid into the mixing tank, add an equal volume of ethanol and ethyl acetate mixture (ethanol: ethyl acetate = 1:3), stir with oxygen for 10 minutes, let stand for a while, and wait for the upper and lower phases to separate Finally, the upper phase was collected as the organic phase, a total of 710L, and the lower phase was an aqueous phase, a total of 1080L. (1) Concentrate 710L organic phase by low-temperature v...

Embodiment 2

[0036]The comprehensive utilization of Yunnan CTC black broken tea slag discharge waste liquid has a solid content of 2.5% and a tea polyphenol mass concentration of 13.0g / L. Measure 1000L of Yunnan CTC black crushed tea slag discharge waste liquid into the blending tank, add ascorbic acid to make the mass fraction 0.3%, and after fully dissolving, pump the slag discharge waste liquid through a heat exchanger to make the temperature of the liquid reach 65°C. Filter through a 200-mesh sieve to remove impurities and obtain slag discharge waste liquid. Pump the slag discharge waste liquid into the mixing tank, add an equal volume of ethanol and ethyl acetate mixture (ethanol: ethyl acetate = 1:3), stir with oxygen for 10 minutes, let stand for a while, and wait for the upper and lower phases to separate Finally, collect the upper phase as the organic phase, 720L in total, and the lower phase as the aqueous phase, 1100L in total. (1) Concentrate 720L organic phase through low-tem...

Embodiment 3

[0040] The comprehensive utilization of Yunnan black tea slag discharge waste liquid has a solid mass fraction of 1.5% and a tea polyphenol mass concentration of 5.7g / L. Measure 1000L of black tea slag discharge waste liquid into the blending tank, add ascorbic acid to make the mass fraction 0.2%, fully dissolve, pump the slag discharge waste liquid through the heat exchanger, make the temperature of the liquid reach 60°C, and then pass through 200 mesh Sieve filter to remove impurities and obtain slag discharge waste liquid. Pump the slagging waste liquid into the mixing tank, add an equal volume of ethanol and ethyl acetate mixture (ethanol: ethyl acetate = 1:4), stir with oxygen for 10 minutes, let it stand for a while, and wait for the upper and lower phases to separate Finally, collect the upper phase as the organic phase, 730L in total, and the lower phase as the aqueous phase, 1150L in total. (1) Concentrate 730L organic phase by low-temperature vacuum at a concentrati...

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Abstract

The invention discloses a method for separating a tea pigment from instant tea slagging waste liquid. The method comprises the following steps: (1) adding an antioxidant into the instant tea slagging waste liquid, heating and dissolving effective components completely, filtering and removing impurities, so as to obtain pretreated slagging waste liquid; (2) adding a mixed solution of ethanol and ethyl acetate into the pretreated slagging waste liquid, introducing oxygen, stirring and then stewing and layering, and separating an upper phase as an organic phase and a lower phase as a water phase; (3) concentrating the organic phase obtained in the step (2) in vacuum, and gathering by adopting medium polar macroporous resin, collecting eluent, concentrating, carrying out freeze drying to obtain a theaflavin product; (4) carrying out chemical solution oxidation on a water phase obtained in the step (2), filtering, concentrating and drying, so as to obtain a theabrownin product. By adopting the method, the problem of wastewater pollution is effectively solved, and meanwhile, the tea pigment product with high additional value is also produced, so that the purpose of turning waste into treasure of the instant tea slagging waste liquid is achieved.

Description

technical field [0001] The invention relates to a comprehensive utilization method of instant tea slag discharge waste liquid, in particular to a method for separating tea pigment from instant tea slag discharge waste liquid. Background technique [0002] Instant tea is a kind of beverage formed by deep processing of traditional tea leaves. It is loved by consumers for its convenience, safety, nutrition and health. my country is a big country in the production of instant tea. Taking Zhejiang Minghuang Natural Food Development Co., Ltd. as an example, it consumes nearly 15,000 tons of tea raw materials and produces nearly 4,000 tons of instant tea every year. Yet, in the production process of instant tea, can produce a lot of tea dregs and the slag discharge liquid that centrifuge filters out. According to calculations, an enterprise with an annual output of 4,000 tons of instant tea processes 50 tons of tea per day and has nearly 20 tons of slag discharge waste liquid. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54C07D311/62C08G65/44A23L1/275A23F3/16A23L5/43
Inventor 叶群傅秀花周建彬刘华东徐方向
Owner ZHEJIANG MINGHUANG NATURAL PRODS DEV
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