I'm very grateful for your answers.
However, my knowledge of chemistry is quite hm..limited
That is the reason why I'm asking for help.
I know the ways how to determinate composition, but I'm not sure what is the cheapest way to produce this material in hundreds of metric tons. That is the reason I think there is a chance that it could be some by-product from industry.
A coleague of mine told me that it is the chance that C11 and C24 could lead to some paper pulping industry.
What is your opinion about it?
This seems unlikely to me that the source is pulp or petroleum. What everyone else has said, that the fatty acid mixture is from an animal or vegetable fat source is more likely. Your identifier, C11 or C24 just means a chain of that many carbons, and that could come from any organic source. It doesn't specify that that the carbon chain ends in a acid group reactive to the hydroxide to form the sodium or potassium salt of a fatty acid, commonly referred to as a soap. But a soap is definitely what you have.
Likewise, your other identifiers here:
C18:0 -- 22,22%
C18:1 -- 18,77%
C18:2 -- 2,16%
Simply means an 18 carbon chain, with a certain number of unsaturations. But we give a different technical name to every carbon chain depending on where the unsaturations are. You have no such information. Generally, living things produce only certain specific types of unsaturations, depending on their species and its needs. That way, the distributions will give you a hint to a source of these fats.
Its also possible that this stuff is a blend of several diverse fats and oil sources. So you may never find "the" source, because there isn't one. Just a mix of several common sources meant to give this soap mix a certain property -- a viscosity, a gelling ability, a cleaning ability, cheapness of cost of raw materials, manufacturing abilities, etc. This may even be for coating a surface, or a lubricant.
Also, you don't really know the composition. There is no harm in reporting a "typical" composition, and then deviating from it, either slightly, or significantly. Its wrong to do that with food, or pharmaceuticals, but not soap or industrial chemicals. that is, in some way, how companies defend themselves from copycats. The patent may describe the composition, but production may no longer be done according to patent, the real production method may be just trade secret. In fact, since its been analyzed to two decimal place, its likely not that composition, unless you've recently analyzed it according to the method described by steven:
Here's a thought -- call the manufacturer and ask them what the source is. They may not tell you. But they might. They might first ask that you promise not to disclose the info to a third party, or make it yourself. But they might not care, after all, they did give you, and everyone else, the composition. They may not be worried that you can make it your self -- once you know the source of fats, then what: you will have to buy it yourself, in metric ton quantities, react it yourself in metric ton quantities, and warehouse reactants and products. They may know for certain that you may not be able to do that cheaply enough to be a competition for the company. And if you are able to make it cheaper to the same standard ... they may ask you to do it for them.