Reference

Inhibiting composition for preventing deposits and corrosion

Inhibiting composition for preventing deposits and corrosion. Vorob'eva, V. S.; Bryukhanova, L. V.; Krigman, L. E.; Govurun, A. A.; Shugorev, V. D.; Speranskii, B. V. (Southern State Scientific-Research Institute of Gas Industry, USSR). U.S.S.R. SU 1057439 A1 30 Nov 1983 From: Otkrytiya, Izobret., Prom. Obraztsy, Tovarnye Znaki 1983, (44), 94. (Russian). (Union of Soviet Socialist Republics). CODEN: URXXAF. CLASS: IC: C02F005-14. APPLICATION: SU 82-3426210 19 Apr 1982. DOCUMENT TYPE: Patent CA Section: 61 (Water) Section cross-reference(s): 51 Salt deposits and corrosion in gas wells are prevented by a compn. contg. pyridine [110-86-1] 0.01-0.05, PhNH2 [62-53-3] 0. 91-22-5 and 1333-41-1 which are cas registry numbers of chemicals are mentioned.15-0.35, quinoline [91-22-5] 0.05-0.15, nitrilotrimethylphosphonic acid [6419-19-8] 0.004-0.008, H2O 3.74-19.34, methyl pyridine [1333-41-1] 0.45-0.70%, and the balance MeOH [67-56-1]. .

Corrosion inhibitors

Corrosion inhibitors. Latos, Edwin J.; Payne, John C. (UOP Inc. , USA). U.S. US 4409121 A 11 Oct 1983, 5 pp. Cont.-in-part of U.S. Ser. No. 170,375, abandoned. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C23F011-16; C23F011-14; C23F011-12; C23F011-18. NCL: 252389000A. APPLICATION: US 82-392869 28 Jun 1982. PRIORITY: US 80-170375 21 Jul 1980. DOCUMENT TYPE: Patent CA Section: 56 (Nonferrous Metals and Alloys) Section cross-reference(s): 55 Corrosion- and scale-inhibiting addns. in recirculating water systems comprise synergistic mixts. of: (a) a phosphate compd., preferably 0. 7631-95-0 and 7758-29-4 which are cas registry numbers are also used here.5-8% and esp. at a (2.5-4):1 ratio with d salt; (b) a phosphonate compd. comprising 1-hydroxyethylidene-1,1-diphosphonic acid (I) [2809-21-4] or nitrilotris(methylenephosphonic acid) [6419-19-8], preferably 0.5-7%; (c) an aryl triazole, preferably 0.5-5%; and (d) a salt of Mo, W, or Cr, preferably 0.5-7%. An effective inhibitor mixt. at 5-5000 ppm contains Na tripolyphosphate, I, benzotriazole [95-14-7], and Na2MoO4. Thus, the corrosion rate of steel was 0.81, and of Cu 0.21 mil/yr in a circulating loop operated at 140° with an aq. soln. (pH 8.0-8.2) contg. Na tripolyphosphate 29.9, I 14.4, benzotriazole 7.2, and Na2MoO4 10 ppm. The corrosion rate was ~10 times higher in a soln. contg. only 100 ppm Na2MoO4. .