DE1189032B - Process for the flotative production of high-percentage potassium chlorine from kainite-containing potash crude salts - Google Patents

Description

Process for the flotative production of high percentage potassium chlorine from cainite crude potash salts According to Canadian patent 612 295 and the Italian one In patent 573 817 it is known to produce kainite from kainite minerals with primary fatty acid amines using one consisting of the components KCl, NaCl, MgS04 and MgClp Lye, which in this composition is within the area of existence of Sylvin des quinary system, saturated with KCl and NaCl, in particular with hard salt liquor to float with about 100 to 250 g of MgCl, and less than about 100 g of MgSO4 per liter. With this flotation, however, the sylvine present in the raw kainite is also floated out. Patent 1,175,172 relates to a process for the flotative production of high-proof liquor Potassium chlorine from kainite-containing potash salts, which is characterized by that the sylvine flotation a kainite flotation with small amounts of known sylvine selective Collectors or collector foams, such as primary aliphatic fatty amines, in a mixture with cation-active compounds that do not respond or hardly respond to KCl, such as secondary ones or substituted primary amines, especially methyldodecylamine, dimethylhexylamine, Precedes dicyclohexylamine, or mixtures of these substances.

As a further development of this process, it has now been found that tall oil fatty amine is a particularly inexpensive means of separating off the kainite, as the following example shows: A mixture of 51% kainite, 43% rock salt and 2.5% kieserite , ground to a grain size of less than 0.5 mm, yields with tall oil amine acetate,; Commercial product Delamat from Herkules Powder, the following concentrates with around 90% kainite yield: a) in a lye from the KCl area of existence of the quinary system of oceanic salts (KCl, NaCl-saturated, 120 g per liter MgCl2): 85 ° / a kainite , 10% NaCl and 5% kieserite; b) in a lye which is saturated in KCl and NaCl and contains 340 g MgCl per liter: 89% kainite, 8% NaCl and 3% kieserite.

Tall oil amine thus offers the advantage of being made from crude salts, in addition to kainite still contain free sylvin, hardly any or only a small amount of this in the Flotation concentrate of the kainite arrives. This is apparently due to the content of the Tallölamins to dehydroabietylamine, the so-called rosin amine. So it will be a backlog obtained, in which practically the sylvin is, for example in flotation in the liquor of composition b). The separation of Sylvins from the residue, in particular rock salt, can then in a known manner in one process stage take place.

In the flotation of a kainite crude potash salt, 250 g / ton Delamin, commercial product of tall oil amine, which is the hydrochloride after neutralization with dilute hydrochloric acid was used, a concentrate of 93% kainite, 4% Sylvine and 3% NaCl with a yield of 89% kainite and a residue Preserved with 5% kainite, 45% sylvin and 50% rock salt.

Claims (1)

Claim: Process for the flotative production of high-proof Potassium chlorine from kainite crude potash salts according to patent 1,175,172, d a d u r c h It is not noted that the kainite flotation with tall oil fatty amine is in the form of the water-soluble salts, such as acetate or hydrochloride, takes place and sylvine flotation is connected in a known manner with primary aliphatic fatty amines.