Press filtration recovery method of active carbon obtained after glycerin decoloring
A recovery method and activated carbon technology are applied in the field of activated carbon filter press recovery after decolorization of glycerin, which can solve the problems of deep color and miscellaneousness, and achieve the effect of cost saving and rapid recovery.
Inactive Publication Date: 2015-11-18
GUANGXI RONGSHUI MINXING RESIN CO LTD
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AI Technical Summary
Problems solved by technology
However, the commercially available crude glycerin is very dark in color due to different degrees of impurities, and needs to be decolorized.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0012] The activated carbon pressure filtration recovery method after glycerin decolorization comprises the following steps:
[0013] (1) Put the glycerin decolorized by activated carbon into the plate and frame filter press, and circulate and filter until there is no activated carbon in the glycerin;
[0014] (2) After the treatment in step (1), inject an aqueous glycerin solution with a concentration of 0.5-1.5wt% into the plate and frame filter press, and circulate and wash the activated carbon for 20-30 minutes;
[0015] (3) After the treatment in step (2), inject water vapor into the plate and frame filter press, and after 5-20 minutes, the activated carbon can be recovered;
[0016] (4) The water vapor for flushing the plate and frame filter press is introduced into the aqueous glycerin solution in step (2) to absorb the glycerin in the water vapor.
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The invention discloses a press filtration recovery method of active carbon obtained after glycerin decoloring. The method comprises 1, feeding glycerin subjected to active carbon decoloring into a frame filter press and carrying out circulating filtration until the glycerin does not contain active carbon, 2, after the step 1, feeding a glycerin aqueous solution with a concentration of 0.5-1.5wt% into the frame filter press, and carrying out circulation cleaning on the active carbon for 20-30min, and 3, after the step 2, injecting water vapor into the frame filter press and after 5-20min, covering the active carbon. The method realizes fast recovery of active carbon in glycerin and saves a cost.
Description
technical field [0001] The invention relates to an activated carbon pressure filtration recovery method after glycerin decolorization. Background technique [0002] High-purity glycerin is a very important industrial raw material and is widely used in industries such as food, medicine, cosmetics and tobacco. However, commercially available crude glycerin is very dark in color due to the mixed impurities in different degrees, and needs to be decolorized. Since glycerin is a viscous liquid, when activated carbon is used for decolorization, the recovery and separation of activated carbon is an urgent problem to be overcome. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a method for recovering activated carbon by pressure filtration after decolorization of glycerin. [0004] In order to solve the problems of the technologies described above, the present invention provides the fol...
Claims
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IPC IPC(8): C01B31/08
Inventor 林福建
Owner GUANGXI RONGSHUI MINXING RESIN CO LTD