Non-drying preparation method of ethylene glycol antimony
A technology of ethylene glycol antimony and drying method, which is applied to the preparation of metal alcohols, the separation/purification of hydroxyl compounds, organic chemistry, etc., and can solve the problem of difficult further improvement of product whiteness and brightness, high price of heavy metal inhibitors, and product hue value. There are problems such as influence, to achieve the effect of saving heavy metal inhibitors, reducing the cost of decolorization and impurity removal, and eliminating unsafe factors
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Embodiment 1
[0016] Example 1: First put 1800kg of ethylene glycol into the reaction tank, heat up to 80°C, then put in 300kg of antimony trioxide, start stirring, 90 rpm, and pass 8kg / cm2 after 10 minutes 2 When the temperature in the tank reaches 100°C, start the vacuum system to keep the negative pressure in the tank at -0.099-0.089mpa. The production volume is ≤120 liters, and the reaction time is 3.5 hours. After the reaction is completed, according to 1% of the input weight of antimony trioxide, add medical activated carbon decolorizer, keep it for 10-15 minutes, and carry out circulation filtration at 150°C. After the reaction, the material is output from the reaction tank, and returns to the same reaction tank through the filter and pipeline, and then filters the ethylene glycol antimony liquid again with another filter to further remove the impurities leaked in the circulating filtration After filtration, cool slowly at 30°C for 30 minutes, then quench with cooling water below 20°...
Embodiment 2
[0017] Embodiment 2: first 1700kg ethylene glycol is dropped into retort, heating 100 ℃, then drop into 275kg antimony trioxide, start stirring, 100 rev / mins, pass through 9kg / cm after 8 minutes 2 When the temperature in the tank reaches 100°C, start the vacuum system to maintain the negative pressure in the tank -0.09mpa, control the temperature in the reaction tank at 141°C-145°C, keep the boiling point of the mixed liquid at all times, and control the output ≤90 liters, the reaction time is 3.2 hours, after the reaction, add activated carbon decolorizer according to 1.5% of the weight of antimony trioxide input, keep it for 10 minutes, carry out circulation filtration under the condition of 150 ℃, and remove the material after the reaction from the reaction Tank output, through the filter and pipeline and then back to the same reaction tank, and then filter the ethylene glycol antimony liquid again with another filter to further remove the impurities leaked in the circulatin...
Embodiment 3
[0018] Embodiment 3: first 1650kg ethylene glycol is dropped into reaction tank, heating 110 ℃, then drop into 250kg antimony trioxide, start to stir, 100 rev / mins, after 9 minutes, pass through 10kg / cm Steam heating, when tank After the temperature reaches 100°C, start the vacuum system to keep the negative pressure in the tank at -0.098~-0.080mpa, control the temperature in the reaction tank at 145°C~150°C, keep the boiling point of the mixed liquid at all times, and control the production volume to ≤70 liters. The reaction time was 2.8 hours. After the reaction was finished, 2.5% of the weight was added by antimony trioxide. Add medical activated carbon decolorizing agent, preferably medical activated carbon decolorizing agent, keep for 12 minutes, carry out circulation filtration at 150°C, output the material after the reaction from the reaction tank, pass through the filter and pipeline and return to the same Reaction tank, and then use another filter to filter the ethyle...
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