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Refining technology of caffeine in caffeine production process

A production process and caffeine technology, applied in the field of medicine and chemical industry, can solve the problems of low recovery rate of caffeine activated carbon, large amount of waste activated carbon and high consumption of activated carbon, so as to reduce carbon treatment costs, reduce usage and increase COD. Effect

Inactive Publication Date: 2015-03-11
SHANDONG XINHUA PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, powdered activated carbon is used for decolorization in the refined production of caffeine, and there are the following problems: (1) The consumption of activated carbon is high, and the consumption of activated carbon in the refined production of caffeine is about 30t / month
(2) The content of caffeine in powdered activated carbon is high, and the recovery rate of activated carbon loaded with caffeine is low
(3) The amount of waste activated carbon produced is large, and the cost of follow-up treatment is relatively high. The consumption of activated carbon in the caffeine refining process is about 30t / month, and the environmental protection treatment of refined waste activated carbon is about 5,000 yuan / ton, and the monthly treatment cost is 150,000 yuan per month.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The specific steps of the caffeine refining process in the caffeine production process are:

[0027] (1) According to the mass ratio of the pure amount of crude caffeine, a high-quality product, a concentrated product and purified water in a ratio of 2:1:1:12, mix the ingredients, heat up to 60°C and add dilute sulfuric acid to adjust the pH to 1.5 , and potassium permanganate was added to keep the pH at 1.5, and heat preservation at 60°C for primary refining oxidation.

[0028] (2) After oxidation, keep the temperature at 60°C and pH 1.5, pass through the second-stage activated carbon fiber filter for decolorization, and then enter the second-stage refining tank.

[0029] (3) Heat the filtrate to 60°C, adjust the pH to 1.5, then add potassium permanganate, keep warm at 60°C, and carry out secondary refining oxidation at pH=1.5.

[0030] (4) Adjust the pH to 1.5 after secondary refining and oxidation, add dissolved activated carbon, keep the temperature at 60°C, pass t...

Embodiment 2

[0034] The specific steps of the caffeine refining process in the caffeine production process are:

[0035] (1) According to the mass ratio of pure caffeine, a fine product, a concentrated product and purified water in a ratio of 2:1:1:12, mix the ingredients, heat up to 75°C and add dilute sulfuric acid to adjust the pH to 3 , and add potassium permanganate to keep the pH at 3, and keep warm at 75°C for primary refining oxidation.

[0036] (2) After oxidation, keep the temperature at 75°C and pH=3, pass through a three-stage activated carbon fiber filter for decolorization, and then enter the secondary refining tank.

[0037] (3) Heat the filtrate to 75° C., adjust the pH to 3, then add potassium permanganate, keep the temperature at 75° C., and carry out secondary refining oxidation at pH=3.

[0038] (4) After secondary refining and oxidation, adjust the pH to 3, add dissolved activated carbon, keep the temperature at 75°C, pass through a 3-stage activated carbon fiber filt...

Embodiment 3

[0042] The specific steps of the caffeine refining process in the caffeine production process are:

[0043] (1) According to the mass ratio of the pure amount of crude caffeine, a fine product, a concentrated product and purified water in a ratio of 2:1:1:12, mix the ingredients, heat up to dissolve and then heat up to 90°C, add dilute sulfuric acid to adjust the pH=4.5 , and potassium permanganate was added to keep the pH at 4.5, and heat preservation at 90°C for primary refining oxidation.

[0044] (2) After oxidation, keep the temperature at 90°C and pH=4.5, pass through a 4-stage activated carbon fiber filter for decolorization, and then enter the secondary refining tank.

[0045] (3) Heat the filtrate to 90°C, adjust the pH to 4.5, then add dissolved potassium permanganate, keep warm at 90°C, and carry out secondary refining oxidation at pH=4.5.

[0046] (4) Adjust the pH to 4.5 after secondary refining and oxidation, add dissolved activated carbon, keep the temperature ...

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Abstract

The invention relates to a refining technology of caffeine in a caffeine production process. The refining technology comprises the following steps: oxidizing caffeine refining material liquid after primary refining is completed, carrying out secondary refining on the oxidized refining material liquid after decoloration through a carbon fiber filter, after the secondary refining is completed, pressing the material liquid in an intermediate tank after decoloration through the carbon fiber filter, and then pressing in a finished product crystallizing tank from the intermediate tank. The refining technology effectively reduces the use of organic solvent chloroform during carbon treatment, and the COD (Chemical Oxygen Demand) is not increased. The use amount of active carbon in the refining process is reduced, and the consumption of caffeine in the refining process is lowered. The amount of the active carbon is reduced, and the refining yield is greatly promoted. Active carbon fibers can be regenerated through hot water boiling, and the treatment method is simple. The subsequent carbon treatment cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of medicine and chemical industry, and in particular relates to a process for refining caffeine in the production process of caffeine. Background technique [0002] The caffeine production and refining process uses potassium permanganate to oxidize and then uses powdered activated carbon for decolorization. The caffeine content in the activated carbon is about 30%, and the organic solvent chloroform is used in the caffeine-loaded activated carbon treatment process. The treated waste activated carbon must be incinerated in an incinerator. [0003] At present, powdered activated carbon is used for decolorization in the refined production of caffeine, and there are several problems as follows: (1) The consumption of activated carbon is high, and the consumption of activated carbon in the refined production of caffeine is about 30t / month. (2) The content of caffeine in powdered activated carbon is high, and the recovery ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D473/12
CPCC07D473/12
Inventor 宫怀正夏丙堃杜德平孙国春陈健张庆武
Owner SHANDONG XINHUA PHARMA CO LTD
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