CS251979B1 - Method of aluminium and alkali hydroxide's aqueous solution reaction inhibition - Google Patents
Method of aluminium and alkali hydroxide's aqueous solution reaction inhibition Download PDFInfo
- Publication number
- CS251979B1 CS251979B1 CS854283A CS428385A CS251979B1 CS 251979 B1 CS251979 B1 CS 251979B1 CS 854283 A CS854283 A CS 854283A CS 428385 A CS428385 A CS 428385A CS 251979 B1 CS251979 B1 CS 251979B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- mol
- concentration
- aqueous solution
- aluminium
- reaction
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 11
- 239000007864 aqueous solution Substances 0.000 title claims description 3
- 230000005764 inhibitory process Effects 0.000 title abstract description 4
- 229910001854 alkali hydroxide Inorganic materials 0.000 title 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 title 1
- 239000004411 aluminium Substances 0.000 title 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims abstract description 11
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims abstract description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 230000002401 inhibitory effect Effects 0.000 claims description 6
- 238000005530 etching Methods 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 239000012670 alkaline solution Substances 0.000 abstract 1
- 239000003112 inhibitor Substances 0.000 description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 239000005018 casein Substances 0.000 description 2
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 2
- 235000021240 caseins Nutrition 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 241000206672 Gelidium Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 235000010419 agar Nutrition 0.000 description 1
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
- 229910001626 barium chloride Inorganic materials 0.000 description 1
- 159000000009 barium salts Chemical class 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229960001436 calcium saccharate Drugs 0.000 description 1
- UGZVNIRNPPEDHM-SBBOJQDXSA-L calcium;(2s,3s,4s,5r)-2,3,4,5-tetrahydroxyhexanedioate Chemical compound [Ca+2].[O-]C(=O)[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O UGZVNIRNPPEDHM-SBBOJQDXSA-L 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- KCWYOFZQRFCIIE-UHFFFAOYSA-N ethylsilane Chemical class CC[SiH3] KCWYOFZQRFCIIE-UHFFFAOYSA-N 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Sposob inhibície je založený na přídavku 2-merkaptobenztiazolu do roztoku alkalického hydroxidu v koncentrácii 10”3 — 10”* 1 mol. I-1. Inhibícia je účinná i v najagresívnejšom roztoku alkalického hydroxidu s koncentráciou 5,0 mol. 1_1 a pri zvýšených teplotách.The method of inhibition is based on addition Of 2-mercaptobenzothiazole into an alkaline solution of hydroxide at a concentration of 10 ”-3-10” * 1 mol. I-1. Inhibition is also effective in the most aggressive alkaline hydroxide solution s 5.0 mol. 1_1 and increased temperatures.
Description
Vynález sa týká sposobu inhibície reakcie hliníka s vodným roztokom alkalického hydroxidu.The invention relates to a method of inhibiting the reaction of aluminum with an aqueous solution of an alkaline hydroxide.
Doteraz známe riešenia inhibície reakcie hliníka v alkalickom prostředí umožňujú účinnejšie inhibovat túto reakciu pri nízkých koncentráciách alkalického hydroxidu spravidla do koncenirácie 0,6 mol. I-1. I v týchto podmienkach však nepřesahuje inhibičný účinok 90%-né zníženie reakčnej rýchlosti voči rýchlosti bez použitia inhibítora. K známým inhibítorom patria sulfitové luhy, agar-agar, dextrin, želatina, deriváty etylsilánov a niektoré iné. Podía čs. pat. 131 475 v silné alkalickom prostředí je účinný postup s použitím trojzložkového inhibítora na báze sacharátu vápenatého, síranu sodného a mliečneho kazeínu. Podstata jeho účinku spočívá v tvorbě nerozpustného filmu hlinitanu vápenatého na povrchu hliníka s vhodnou adhéziou a štruktúrou modifikovanou síranom sodným a mliečnym kazeínom.The solutions known to date for inhibiting the aluminum reaction in an alkaline medium make it possible to inhibit this reaction more effectively at low concentrations of alkaline hydroxide, as a rule, to a concentration of 0.6 mol. I -1 . However, even under these conditions, the inhibitory effect does not exceed a 90% reduction in the reaction rate versus the rate without the use of an inhibitor. Known inhibitors include sulphite liquors, agar-agar, dextrin, gelatin, ethylsilane derivatives, and some others. Podía čs. pat. 131 475 in a strong alkaline environment is an efficient procedure using a three-component inhibitor based on calcium saccharate, sodium sulfate and milk casein. The essence of its action is to form an insoluble calcium aluminate film on the aluminum surface with a suitable adhesion and structure modified with sodium sulfate and milk casein.
Podstata sposobu inhibície reakcie hliníka s vodným roztokom alkalického hydroxidu podía vynálezu spočívá v přídavku 2-merkaptobenztiazolu do roztoku alkalického hydroxidu v koncentrácii 10-3 — 10“1 mol. -1. Z hladiska ekonomického ako i technického účinku sa ako najvýhodnejšia javí koncentrácia 5.10-3 mol. í-1 — 5 . . 10-2 mol. I'1. Účinok sa zvyšuje přidáním rozpustnej vápenatej alebo bárnatej soli o koncentrácii 1.10-3 — 5.10~2 mol. I-1 například v chloridovej formě.The method of inhibiting the reaction of aluminum with an aqueous alkaline hydroxide solution according to the invention consists in adding 2-mercaptobenzothiazole to the alkaline hydroxide solution in a concentration of 10 -3 - 10 -1 mol. -1 . In terms of both economic and technical effects, a concentration of 5.10 -3 mol. í -1 - 5. . 10 -2 mol. I ' 1 . The effect is increased by adding a soluble calcium or barium salt with a concentration of 1.10 -3 - 5.10 ~ 2 mol. I -1, for example, in chloride form.
Hlavnou výhodou postupu podía vynálezu je účinná inhibícia reakcie hliníka s alkalickými hydroxidmi přidáním dostupného jedno, připadne dvojzložkového inhibítora priamo do roztoku alkalického hydroxidu. Koncentrácia inhibítora je nízká v porovnaní so známými inhibítormi a účinná pri l'ubovofnej koncentrácii alkalického hydroxidu včítane najagresívnejšieho roztoku o koncentrácii 5 mol. I-1. K dalším výhodám patří nepatrná závislost inhibičného účinku od teploty, čo umožňuje použitie postupu i pri zvýšených teplotách do 80 °C i vyšších.The main advantage of the process according to the invention is the effective inhibition of the reaction of aluminum with alkaline hydroxides by adding an available single or two-component inhibitor directly to the alkaline hydroxide solution. The inhibitor concentration is low compared to known inhibitors and effective at any concentration of alkaline hydroxide, including the most aggressive 5 mol concentration. I -1 . Other advantages include a slight temperature dependence of the inhibitory effect, which allows the process to be used at elevated temperatures up to 80 ° C or higher.
PřikladlEXAMPLE
Technický hliník podl'a ČSN 424 005 na exponovanej straně prebrúsený a leštený na drsnost 0,1 μπι sa vystavil účinku NaOH o koncentrácii 5 mol.l-1 za přítomnosti 2-merkaptobenztiazolu v koncentrácii 10-2 mol. I-1 a BaCl2 v koncentrácii 0,8.10-2 mol. I-1. Pri miešaní roztoku hydroxidu s inhibítorom rýchlosťou 700 ot. min-1 a teplote 25 °C sa reakčná rýchlosť znížila o 95 % voči rýchlosti bez použitia inhibítora.The technical aluminum according to ČSN 424 005 on the exposed side was regrinded and polished to a roughness of 0.1 μπι and was exposed to NaOH at a concentration of 5 mol.l -1 in the presence of 2-mercaptobenzothiazole at a concentration of 10 -2 mol. I -1 and BaCl2 at a concentration of 0.8.10 -2 mol. I -1 . While stirring the hydroxide solution with the inhibitor at 700 rpm. min -1 and a temperature of 25 ° C, the reaction rate decreased by 95% over the rate without the use of inhibitor.
Příklad 2Example 2
Technický hliník ako v příklade 1 sa vystavil účinku roztoku NaOH o koncentrácii 1,0 mól. I-1 za podmienok ako v příklade 1. Reakcia sa prakticky zastavila pri znížení o 99,9 %.Industrial aluminum as in Example 1 was exposed to a 1.0 mole NaOH solution. -1 I, under conditions as in Example 1. The reaction was quenched substantially in the decrease of 99.9%.
Příklad 3Example 3
Technický hliník ako v příklade 1 sa vystavil účinku roztoku NaOH o koncentrácii 1,0 mol. I-1 za podmienok ako v příklade 1 pri teplote 55 °C a koncentrácii 2-merkaptobenztiazolu 5.10-2 mol. I-1. Reakčná rýchlosť sa znížila o 90 %.Technical aluminum as in Example 1 was exposed to a 1.0 mol NaOH solution. -1 I, under conditions as in Example 1 at 55 ° C and the concentration of 2-mercaptobenzothiazole 5.10 -2 mol. I -1 . The reaction rate decreased by 90%.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS854283A CS251979B1 (en) | 1985-06-13 | 1985-06-13 | Method of aluminium and alkali hydroxide's aqueous solution reaction inhibition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS854283A CS251979B1 (en) | 1985-06-13 | 1985-06-13 | Method of aluminium and alkali hydroxide's aqueous solution reaction inhibition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS428385A1 CS428385A1 (en) | 1986-12-18 |
| CS251979B1 true CS251979B1 (en) | 1987-08-13 |
Family
ID=5385219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS854283A CS251979B1 (en) | 1985-06-13 | 1985-06-13 | Method of aluminium and alkali hydroxide's aqueous solution reaction inhibition |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS251979B1 (en) |
-
1985
- 1985-06-13 CS CS854283A patent/CS251979B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS428385A1 (en) | 1986-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4617129A (en) | Scale inhibition | |
| GB1500859A (en) | Method of corrosion inhibition | |
| BE856457A (en) | PERFECTED PROCESS FOR INHIBITIONING THE CORROSION OF FERROUS METALS IN AQUEOUS ENVIRONMENT AND ESPECIALLY IN SEA WATER | |
| SE9500264L (en) | Preparation of aluminum salt solutions | |
| CA2174184A1 (en) | Absorption Refrigeration System Working Fluid with Corrosion Inhibitor and Method of Manufacture | |
| US3850817A (en) | Drilling fluid | |
| FR2115300A1 (en) | Corrosion inhibition by adding alkaline metal gluconates - and zinc salts to the water supply | |
| CS251979B1 (en) | Method of aluminium and alkali hydroxide's aqueous solution reaction inhibition | |
| US4229409A (en) | Method of inhibiting corrosion of aluminum with 2-phosphono-butane-1,2,4-tricarboxylic acid | |
| CA2074335A1 (en) | Naphthylamine polycarboxylic acids | |
| GB1433221A (en) | Water treatment | |
| RU2115631C1 (en) | Composition for inhibiting salt formation and corrosion | |
| US4353924A (en) | Animal feed supplement having reduced corrosion characteristics | |
| BR8701331A (en) | COMPOSITION TO INHIBIT CORROSION IN INDUSTRIAL COOLING WATERS AND PROCESS TO IMPROVE THE PERFORMANCE OF PHOSPHONATE CORROSION INHIBITORS IN WATER SYSTEMS | |
| ES8609161A1 (en) | Scale inhibiting composition. | |
| JP2848671B2 (en) | High-temperature water-based corrosion inhibitor | |
| CA1234479A (en) | Process for acidizing hot siliceous material | |
| Katsukawa | Processing Rinse Waters From Aluminum Alloy Anodizing Treatment | |
| GB1385888A (en) | Additives for heat-exchange systems | |
| Fouda | EFFECT OF o-BENZOIC ACID DERIVATIVES ON THE CORROSION BEHAVIOUR OF ZINC IN ZM SODIUM HYDROXIDE SOLUTION WITH AND WITHOUT BARIUM | |
| US2303400A (en) | Alkaline detergent | |
| SU1354812A1 (en) | SOLID FOAM FOR REMOVING LIQUID FROM GAS WELLS | |
| Darwish | Effect of Furfural on the Corrosion of Aluminum in Sodium Hydroxide, Potassium Hydroxide and Hydrochloric Acid Solutions | |
| GB1199547A (en) | Process for the Preparation of alpha-Ketoglutaric Acid. | |
| GB465808A (en) | Method of operating water-cooled steam condensers |