Patent PL-170931-B1 (PL)
Title: Agent for use to temporarily protect metal surface and method of obtaining same
Inventor: OLSZEWSKI STANISLAW
IPC: C23F11/08
Filed: 1993-04-28
Abstract: 1. A substance for temporary protection of metal element surfaces contains: from 0.1 to 65 parts by mass of mineral oil, characterised by the kinematic viscosity of 10 x 10-6> to 14 x 10-6> m2>/s at the temperature of 323 K, and the freezing point under 228 K and the acid number that does not exceed 0.07 mg KOH/g; and from 0.1 to 5 parts by mass of lanolin, characterised by the acid number that does not exceed 8 mg KOH/g, the dropping point between 305 and 321 K and the saponification number between 70 and 140; and from 5 to 60 parts by mass of a solvent, obtained from primary processing of petroleum with the distillation range between 458 to 583 K, while the content of sulphur does not exceed 0.1 percent by mass and the acidity does not exceed 0.6 mg KOH per 100 cm3>. Characterized in that it consists of 0.3 to 20 parts by mass of esterification product, containing triethylene glycol esters and oxidized hydrocarbon fractions, characterised by the dropping point of 308 K and the acid number between 3 and 4 mg KOH/g, while the pH value of the aqueous extract is between 5 and 7, and 0.1 to 5 parts by mass of corrosion inhibitor, containing calcium keryl benzene-sulphonates, characterised by calcium amount of at least 5 percent by mass and sulphur amount of at least 8 percent by mass, and the acid number that does not exceed 25 mg KOH/g, while the specific gravity is 1.12 g/cm3>.  2. A method of producing the substance for temporary protection of metal element surfaces -  characterized in that the reaction still heated to the temperature between 343 to 373 K, preferably to 348 K, 0.1 to 5 parts by mass of lanoline is fused with the 0.3 to 20 parts by mass of esterification product - obtained from the product of oxidation of large-molecule n-paraffin hydrocarbons in the process of esterification with pure triethylene glycol with the boiling temperature of 558 to 573 K, while the mass ratio of the oxidation product to glycol was equal to 10:1 - in the environment of aliphatic hydrocarbons, characterised by the normal distillation temperature of 423 to 503 K, the density of 0.780 to 0.810 kg/dm3>, neutral reaction of aqueous extract and the ignition temperature under 313 K. The process is carried out in the apparatus equipped with an azeotropic adapter, in the presence of zinc catalyst introduced into the reaction environment as 0.001 parts by mass of zinc, with reference to the mass of the entire reaction mixture, at the temperature which is not lower than 458 K, but not higher than 478 K. During the process, the azeotropic adapter collects 0.1 parts by mass of water, with reference to the mass of all substrates. Then, the aliphatic hydrocarbons are distilled under the pressure of 13.33 hPa. The above-mentioned product of oxidation of large-molecule n-paraffin hydrocarbons is obtained from the hydrocarbons obtained from petroleum processing and characterised by the dropping point of 327 to 335 K, the oil content under 1 percent, neutral reaction and the penetration not higher than 14 at the temperature of 298 K. The oxidation process is carried out with atmospheric air, used at the rate of 400 m3> /h at the temperature of 293 to 403 K, in the presence of potassium permanganate as the catalyst, used at the rate of 1 kg per 1000 kg of hydrocarbons, until obtaining the product characterised by the acid number between 60 and 70 mg KOH/g,...