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Preparation of such powders is very simple and can be made in the following ways:
Cook soap glue mostly from fats rich in stearic acid, with the addition of rosin. Welded soap glue is placed in the boiler and cooled with stirring. After proper cooling to small and equal portions, add soda, all the while stirring. When will the complete dissolution and the mixture is well mixed, the mass released from the boiler in the form. As a form, which should solidify the detergent, it is best to use boxes made of galvanized iron measuring 50x50x10 cm, for grinding of soap powder to avoid heating the powder by friction, as the powder can be in this mushy and sticky. Well suited for this purpose may be steel drums equipped with holes, like hole kitchen grater. The powder gets between the reel and grind.
Instead of boiling soap glue, you can use ready-made soap or soap scraps. In this case dissolved by heating in a small quantity of water and continue to do as stated above.
For soap glue can be used not fat, and oleic acid. In this case there is no need to use sodium hydroxide as saponification may be carried out soda. Is prepared solution of sodium carbonate and added oleic acid. To be sure that all of oleic acid is associated, is added in case of need even soda. Keeping in soap powders fatty acids is very diverse and sometimes part of the fatty acids replace the rosin. With the addition of rosin to be very careful, because too much addition it makes the soap mass is too sticky and uncomfortable for processing into powder.
Also used for washing powders to cheaper animal fats, such as blubber, bone fat, etc.
Washing powder by Tomsou
Palm Oil 10 kg
Oleic acid 5 kg
Soda 9 kg
Water 6 l
Sodium hydroxide solution 30 ° Bome 12 kg
For a solution of sodium hydroxide used 30 parts by weight of sodium hydroxide and 90 parts by weight of water.
Sodium hydroxide is placed in a pot, heated in a boiling solution, stirring constantly, pour in oleic acid, and immediately going on saponification.
Then, add palm oil and heated the mixture until at least until a uniform saponification, which is recognizable by the form obtained by the soap mass, which should be homogeneous and compact.
In addition, this mass should harden when cooled and when the sample into the language (which is safe) to be slightly alkaline (this method of sample used among practitioners).
Once the soap mass boiled for about 10 minutes, added with constant stirring soda. Mixing, which initially carried a wooden stirrer, it is necessary from this point to make is a shovel. The more soda is added, the harder it becomes to interfere, as the soap mass, formerly of the liquid becomes a paste, and finally komkoobraznoy.
In large enterprises to enjoy special mixing stirrers equipped with strong mental devices and screens actuated motors. With constant stirring, and what happens as a result of this heat release lumps are broken, and the powder is obtained, only needs to sweep through a sieve. Only if you want to get a very fine powder, the need for a product to pass through a special mill.
If the cooking of soap produced by live steam, as is usually done, then glued to the soap is added about 60 parts of condensed water, so that the soap powder will contain 35-36% fatty acids.
In the absence of machine accessories hot soapy doughy mass is poured into a wide shallow form in which it solidifies. Then these big break into small pieces and allow for a soap powder through a special mill.
You can optionally regulate the content of fatty acids by adding more or less soda or water.
If the brew to produce a bare flame or water bath, then get a soap powder with 39-40% content of fatty acids, and can reduce that percentage by adding soda or water.