GB673180A - Inhibition of phosphoric acid corrosion - Google Patents
Inhibition of phosphoric acid corrosionInfo
- Publication number
- GB673180A GB673180A GB946/50A GB94650A GB673180A GB 673180 A GB673180 A GB 673180A GB 946/50 A GB946/50 A GB 946/50A GB 94650 A GB94650 A GB 94650A GB 673180 A GB673180 A GB 673180A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- per cent
- corrosion
- steels
- equivalent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title abstract 6
- 230000007797 corrosion Effects 0.000 title abstract 5
- 238000005260 corrosion Methods 0.000 title abstract 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 title abstract 2
- 230000005764 inhibitory process Effects 0.000 title 1
- 239000002253 acid Substances 0.000 abstract 8
- 229910000831 Steel Inorganic materials 0.000 abstract 4
- 239000010959 steel Substances 0.000 abstract 4
- 235000011007 phosphoric acid Nutrition 0.000 abstract 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 2
- COHDHYZHOPQOFD-UHFFFAOYSA-N arsenic pentoxide Chemical compound O=[As](=O)O[As](=O)=O COHDHYZHOPQOFD-UHFFFAOYSA-N 0.000 abstract 2
- 229910052799 carbon Inorganic materials 0.000 abstract 2
- 239000003054 catalyst Substances 0.000 abstract 2
- 239000010408 film Substances 0.000 abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 239000002245 particle Substances 0.000 abstract 2
- 239000010453 quartz Substances 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- -1 FEPO4 Chemical compound 0.000 abstract 1
- 239000003377 acid catalyst Substances 0.000 abstract 1
- 230000029936 alkylation Effects 0.000 abstract 1
- 238000005804 alkylation reaction Methods 0.000 abstract 1
- 238000004458 analytical method Methods 0.000 abstract 1
- 229910052787 antimony Inorganic materials 0.000 abstract 1
- GHPGOEFPKIHBNM-UHFFFAOYSA-N antimony(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Sb+3].[Sb+3] GHPGOEFPKIHBNM-UHFFFAOYSA-N 0.000 abstract 1
- 238000013459 approach Methods 0.000 abstract 1
- 229910052785 arsenic Inorganic materials 0.000 abstract 1
- 229910052797 bismuth Inorganic materials 0.000 abstract 1
- WIKQEUJFZPCFNJ-UHFFFAOYSA-N carbonic acid;silver Chemical compound [Ag].[Ag].OC(O)=O WIKQEUJFZPCFNJ-UHFFFAOYSA-N 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 229910000153 copper(II) phosphate Inorganic materials 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 239000003112 inhibitor Substances 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000006317 isomerization reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 150000002736 metal compounds Chemical class 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 abstract 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- LKZMBDSASOBTPN-UHFFFAOYSA-L silver carbonate Substances [Ag].[O-]C([O-])=O LKZMBDSASOBTPN-UHFFFAOYSA-L 0.000 abstract 1
- KQTXIZHBFFWWFW-UHFFFAOYSA-L silver(I) carbonate Inorganic materials [Ag]OC(=O)O[Ag] KQTXIZHBFFWWFW-UHFFFAOYSA-L 0.000 abstract 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 abstract 1
- 239000010409 thin film Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000009736 wetting Methods 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/04—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Corrosion of high chrome-nickel austenitic steels by concentrated phosphoric acid used as catalyst in reactions such as alkylation of aromatics and isomerization or polymerization of olefines is inhibited by solution in the acid of Cu, As, Sb, Bi, Ag or Fe equivalent to 0.0005-0.2 gram atom of metal per 1. of acid. The said steels contain: Cr 16-30, Ni 7-20, C not above 0.1, and, if desired, Mo 0.5-8, usually 1-5 per cent. Analyses of suitable American-type steels are given. Corrosion tests are given using 85-115 per cent orthophosphoric at 200-400 DEG F., showing a decrease in corrosion above 100 per cent. Other results show the prevention of intergranular corrosion of steels of carbon below 0.03 per cent or containing Cb equivalent to 10 times or Ti equivalent to 4 times the carbon. Among the metal compounds added are Cu3(PO4)2, Sb2O3, Ag2CO3, As2O5, FEPO4, FeO, and Bi2O2CO3. Propylene, butenes or mixtures may be polymerized with the inhibited acid of above 100 per cent at 200-375 DEG F. and above 200 p.s.i. The acid catalyst may be used in bulk or as a thin film on the surface of a material such as quartz made by wetting finely-divided quartz with 75-80 per cent H3PO4, draining, and drying to a concentration of 95-115 per cent. Acid is preferably added to the catalyst during the on stream period continuously or intermittently or the feed interrupted while the reactor is flooded with acid and drained. The reactor may be packed at the base with several layers of particles of gradually decreasing size while the greater part is filled with 10-20 mesh or smaller. Feed enters at the top and leaves at the bottom while acid containing inhibitor may be sprayed down from the top or introduced at the base until it approaches the top surface and then allowed to drain off. The amount added may be only sufficient to maintain activity, i.e. to maintain the acid content of the bed above 2 lbs. H3PO4 per cubic foot, or may be in excess with continuous draining off, but still only sufficient to flow as a film over the particles. Its concentration may equal that of the acid in the film or may be less, being adjusted to supply the water necessary to hydrate the feed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US673180XA | 1949-06-04 | 1949-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB673180A true GB673180A (en) | 1952-06-04 |
Family
ID=22075185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB946/50A Expired GB673180A (en) | 1949-06-04 | 1950-01-13 | Inhibition of phosphoric acid corrosion |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB673180A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0169651A2 (en) * | 1984-06-21 | 1986-01-29 | Halliburton Company | Method and composition for protecting metal surfaces from oxidative environments |
-
1950
- 1950-01-13 GB GB946/50A patent/GB673180A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0169651A2 (en) * | 1984-06-21 | 1986-01-29 | Halliburton Company | Method and composition for protecting metal surfaces from oxidative environments |
| EP0169651A3 (en) * | 1984-06-21 | 1988-04-27 | Halliburton Company | Method and composition for protecting metal surfaces from oxidative environments |
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