FIELD: technological processes.
SUBSTANCE: invention relates to acid treatment processes. Acid treatment process comprises: (a) providing a treatment fluid, which contains dissolved glucono-delta-lactone; (b) treatment fluid contact with the acid soluble material; (c) enabling the glucono-delta-lactone hydrolysis to produce gluconic acid and for at least portion of the acid-soluble material dissolving in gluconic acid; wherein during the step (c) or thereafter, the treatment fluid comprises a dissolved salt, lactate or acetate, effective to prevent the gluconic acid alkaline earth metal salts precipitation and / or dissolution.
EFFECT: acid-soluble materials dissolution at low temperatures.
18 cl, 1 dwg, 2 tbl, 3 ex
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