A method for purifying high-purity trichloroacetone for preparing folic acid
A technology of trichloroacetone and a purification method, applied in the field of purification of high-purity trichloroacetone, can solve the problems of high cost, complicated process, low yield and purity, and achieve the effects of low price, good purity and high extraction rate
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Embodiment 1
[0020] The first step: trichloroacetone crude product is extracted with water:
[0021] Add 400 ml (about 600 grams) of commercially available trichloroacetone (content 51.8%) into a 1000 ml beaker, add 200 ml of water, heat up to about 35°C under stirring, transfer to a 1000 ml separatory funnel for shaking, and then let it stand for stratification , separate the upper trichloroacetone aqueous extract and place it separately, continue to add 200 ml of water to the lower layer and repeat the above operation to extract trichloroacetone, and the trichloroacetone aqueous extract separated for the second time is merged into the trichloroacetone water separated for the first time In the extract, 200 ml of water was added to the lower layer to repeat the above operation to extract trichloroacetone, and the trichloroacetone aqueous extracts extracted three times were combined. The total time of three extractions is about 2.5 hours, and the content of trichloroacetone in the water ext...
Embodiment 2
[0025] The first step: trichloroacetone crude product extraction:
[0026] Add 400 milliliters (about 600 grams) of commercially available trichloroacetone (content 51.8%) in a 1000 milliliter beaker, add filtrate (the filtrate described in the second step in the embodiment 1) 240 milliliters, heat up to about 35 ℃ under stirring, transfer After shaking the separating funnel to 1000 milliliters, let it stand for stratification, separate the trichloroacetone water extract from the upper layer and place it separately, and continue to add 200 milliliters of filtrate to the lower layer to repeat the above operation to extract trichloroacetone, and the trichloroacetone water separated for the second time The extract was merged into the trichloroacetone water extract that was separated for the first time, and about 200 ml of filtrate was added to the lower layer to repeat the above operation to extract trichloroacetone, and the trichloroacetone water extract extracted three times was...
Embodiment 3
[0030] The first step: trichloroacetone crude product extraction:
[0031] Add 400 milliliters (about 600 grams) of commercially available trichloroacetone (content 51.8%) in a 1000 milliliter beaker, add filtrate (the filtrate described in the second step in the embodiment 1) 240 milliliters, heat up to about 10 ℃ under stirring, transfer After shaking the separating funnel to 1000 milliliters, let it stand for stratification, separate the trichloroacetone water extract from the upper layer and place it separately, and continue to add 200 milliliters of filtrate to the lower layer to repeat the above operation to extract trichloroacetone, and the trichloroacetone water separated for the second time The extract was merged into the trichloroacetone water extract that was separated for the first time, and about 200 ml of filtrate was added to the lower layer to repeat the above operation to extract trichloroacetone, and the trichloroacetone water extract extracted three times was...
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