Production method of sodium copper chlorophyllin

Abstract

The invention discloses a production method of sodium copper chlorophyllin. With chlorophyll paste as the raw material, the method comprises the steps of: adding a NaOH solution into the chlorophyll paste for a saponification reaction, then conducting saponification and separation, adding copper for crystallization, precipitation and purification, salt formation and drying, thus obtaining a sodium copper chlorophyllin finished product. The solid and liquid are separated during the whole production course. The production method of the invention thoroughly solves various disadvantages of liquid-liquid separation in prior art, eradicates labour-consuming and time-consuming liquid-liquid separation difficult to control in production, and realizes solid-liquid separation in the whole course, thus reducing equipment investment by 30%, saving energy and reducing consumption by 40%, enhancing product yield by over 5%. The production method provided in the invention has the characteristics of high production efficiency, less solvent kind, obvious energy saving and emission reduction effect, as well as low production cost, etc.

Description

Technical field [0001] The invention relates to a method for preparing natural pigments from fine chemicals, in particular to a method for producing sodium copper chlorophyllin. Background technique [0002] The traditional process of using pasty chlorophyll to produce sodium copper chlorophyll is: paste chlorophyll is added to two solvents to dissolve and saponify, and then separated → ethanol is added to adjust the saponification solution, and then copper sulfate is added to set copper → washed with water, ethanol, petroleum ether and purified → The refined copper acid is placed in sodium to form a salt, filtered and dried to obtain sodium copper chlorophyllin. The invention patent "Patent No. ZL200710061547.2", the invention patent "Patent No. ZL01128942.2" and other processes are mostly used for saponification of ethanol (or acetone) and gasoline (or petroleum ether) two solvents to repeatedly dissolve, wash, stand for stratification, liquid-liquid Separate the saponifiable ...

AI Technical Summary

Problems solved by technology

In the saponification reaction, ethanol (or acetone) and gasoline (or petroleum ether) are used to dissolve the saponification reactants to form a liquid-liquid separation, and the two liquids need to stand for a long time before they can be layered and separated, so Takes up too much equipment and consumes a lot of time

[0005] 2. Large solvent consumption and high energy consumption

Due to the need for large doses of gasoline (or petroleum ether) to dissolve the unsaponifiable matter many times, the consumption is large (more than 30 times), and the recovery temperature is high, resulting in large consumption, high energy consumption and high cost

[0006] 3. Low yield

Due to liquid-liquid separation, there is always a transition zone between the two liquids, the interface is not easy to control, and it is easy to cause losses and reduce the yield.

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