Method for preparing sodium soap
A technology of sodium soap and saponification, which is applied in the field of preparing sodium soap, which can solve the problems of insufficient utilization, a large amount of alkali-containing wastewater, and cumbersome production steps, and achieve the effects of low loss, less impurities, and simple equipment
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example 1
[0017] Example 1: the production of soybean oil sodium soap
[0018] Dissolve 100g of soybean oil in 400g of 95% ethanol, place the reactor containing the solution in a salt bath at 170°C, stir rapidly, and slowly add 21.5g of sodium hydroxide powder after the solution boils, and continue the reaction until hydrogen The sodium oxide was completely dissolved, and the soybean oil was completely reacted. Leave the solution to cool down at low temperature, and white flocculent solids will slowly precipitate out. When the temperature of the solution drops to 5°C, no more solids will precipitate out. Filter with suction, and dry the filter cake in an oven at 60°C for 2-3 hours to obtain sodium soap. Product, the filtrate is an ethanol solution of glycerin and unsaponifiable matter, and the ethanol can be recycled after distillation. Product soap quality is 109.4g, and productive rate is 90%. The free caustic content in sodium soap is determined by QB / T2623.1-2003 standard to be 0....
example 2
[0019] Example 2: the production of rapeseed oil sodium soap
[0020] Dissolve 100g of rapeseed oil in 350g of absolute ethanol, place the reactor containing the solution in a salt bath at 160°C, stir rapidly, and slowly add 23.5g of sodium hydroxide powder after the solution boils, and continue the reaction until The sodium hydroxide was completely dissolved, and the soybean oil was completely reacted. Leave the solution to cool down at low temperature, white flocculent solids slowly precipitate out, when the temperature of the solution drops to 0°C, no more solids precipitate out, filter with suction, and dry the filter cake in an oven at 60°C for 2-3 hours to obtain the product soap , the filtrate is an ethanol solution of glycerin and unsaponifiable matter, and the ethanol can be recycled after distillation. Product soap quality is 89.5g, and productive rate is 72.5%. The free caustic content in sodium soap is determined by QB / T2623.1-2003 standard to be 0.131%, which me...
example 3
[0021] Example 3: the production of tallow oil sodium soap
[0022] Dissolve 100g of tallow tree oil in 500g of anhydrous methanol, place the reactor containing the solution in a salt bath at 180°C, stir rapidly, and slowly add 23g of sodium hydroxide powder after the solution boils, and continue the reaction until the hydroxide is oxidized The sodium is all dissolved, and the tallow oil is completely reacted. Leave the solution to cool down at low temperature, white flocculent solids slowly precipitate out, when the temperature of the solution drops to 0°C, no more solids precipitate out, filter with suction, and dry the filter cake in an oven at 60°C for 2-3 hours to obtain the product soap , the filtrate is a methanol solution of glycerol and unsaponifiable matter, and methanol can be recycled after distillation. Product soap quality is 93.5g, and productive rate is 76%. The free caustic content in sodium soap is determined by QB / T2623.1-2003 standard to be 0.148%, which ...
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