SU406801A1 - - Google Patents

Description

one

This invention relates to a process for producing pure industrial brines and can be used in the production of soda by the ammonia method.

A known method for producing brines by underground leaching of halite — natural rock salt — with water containing an additive of polyphosphates, which makes it possible to obtain a brine with a reduced content of Ca + and

The disadvantage of this method is its limited applicability, since it is unacceptable on formations containing a large amount of highly soluble sulfates, such as magnesium and. As a result, the resulting brine contains a large amount of sulphate ion and magnesium ion. In addition, reservoir wells produce brine with a reduced content of the main component, sodium chloride.

In order to eliminate these drawbacks, it has been proposed to use as an additive solutions containing calcium and sodium chlorides and ammonia, for example, distillation liquid of soda production, in an amount of 0.1-0.4 m of solution per 1 m of water supplied to the underground mineral water. .

Example. 18.7 m- / h and R, 3 m-hour distiller liquid are pumped into the brine well. Po.pukpog cbipoii brine composition in gr-eq / l: Na + - 5.420; - 0.084; - 0,284;

SO4 - 0.084; Cl- - 5.420.

After lime-soda purification of the brine, a purified brine of composition is obtained, in gr-eq / l:

Na + -5.420; Ca2 + -0.001; Mg "- -0.0003;

sol- - 0.084; Cl- - 5.420.

The mud depth of the slurry at the brining station is 0.3 m / h.

When reproducing a known method, 25 water containing 1.5 g of PjOs per liter of brine was pumped into a brine well. Received crude brine composition, gq-eq / l:

Na + -6.42; Ca -0.014; Mg -0.286;

, 500; C1--5,175.

After brine soda purification, a purified brine was obtained. composition, g-EQ / l:

Na + - 5.42; - 0.001; Mg = 0.0003;

, 500; C1--5,175.

In this case, the rate of sludge separation at the brine cleaning station is 0.1 m / h.

Thus, the advantages of the proposed method in comparison with the known method consist in the fact that it is possible to obtain on reservoirs containing a large amount of soluble sulfates, with a sulfate level 5 times less, chloride is 1 times 105 times more, magnesium ion is 1% less than by a known method. This will improve sludge treatment at the brine cleaning station. AMN Subject of isoretration A method of obtaining brines by underground leaching of halite sediments with water in the presence of additives, is distinguished by the fact that, in order to reduce soda |. sulphate ion increase sodium chloride in brine, as additives use solutions containing chlorides of sodium chloride and sodium and ammonia, for example, distillation liquid soda penetration, in an amount of 0.1-0.4 m "solution per 1 m of water, served on underground leaching.