JPS63178199A - Cleaning composition - Google Patents
Cleaning compositionInfo
- Publication number
- JPS63178199A JPS63178199A JP861487A JP861487A JPS63178199A JP S63178199 A JPS63178199 A JP S63178199A JP 861487 A JP861487 A JP 861487A JP 861487 A JP861487 A JP 861487A JP S63178199 A JPS63178199 A JP S63178199A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- salt
- cleaning composition
- composition
- added
- 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.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims description 13
- 238000004140 cleaning Methods 0.000 title claims description 8
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 21
- 150000003839 salts Chemical class 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 7
- 235000006408 oxalic acid Nutrition 0.000 claims description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 12
- -1 alkali metal salts Chemical class 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical class N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 6
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical class NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 6
- 239000010802 sludge Substances 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 description 2
- YHAIUSTWZPMYGG-UHFFFAOYSA-L disodium;2,2-dioctyl-3-sulfobutanedioate Chemical compound [Na+].[Na+].CCCCCCCCC(C([O-])=O)(C(C([O-])=O)S(O)(=O)=O)CCCCCCCC YHAIUSTWZPMYGG-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012456 homogeneous solution Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 1
- URDCARMUOSMFFI-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(2-hydroxyethyl)amino]acetic acid Chemical compound OCCN(CC(O)=O)CCN(CC(O)=O)CC(O)=O URDCARMUOSMFFI-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical class C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical class CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 150000002429 hydrazines Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229940047670 sodium acrylate Drugs 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical class CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Detergent Compositions (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、ボイラーや熱交換器の缶壁に固着する缶型
や底部にたまるスラッジを溶解除去するのに有用な洗浄
用組成物に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a cleaning composition useful for dissolving and removing sludge that accumulates in can shapes and bottoms that adhere to can walls of boilers and heat exchangers. It is.
（従来の技術）
従来、スケールを化学的に除くことのために１種々の溶
解剤が作られている１例えば、硝酸アルミニウム又は硝
酸鉄とスルファミン酸とからなるもの（特開昭５６−４
８２９７）、キレート剤と陽イオン交換樹脂を被洗浄体
へ供給する方法（特開昭５７−１０７２９７） 、クエ
ン酸とΩ−アスコルビン酸のような還元剤とアルキルベ
ンゼンスルホン酸を含むスケール溶解除去剤（特開昭５
７−１５８９５）、ＥＤＴＡ又はその塩（例えば、ナト
リウム、アミン、アンモニア、ヒドラジンなどの塩）を
成分とする洗浄液を使用する鉄を含むスケールの洗浄（
特公昭５２−４３４５３）、ＥＤＴＡとクエン酸の水溶
液で逆浸透膜モジュールを洗う（特公昭５３−２８１４
５）などが知られている。(Prior Art) Conventionally, various dissolving agents have been made for chemically removing scale.
8297), a method for supplying a chelating agent and a cation exchange resin to an object to be cleaned (JP-A-57-107297), a scale dissolving agent containing a reducing agent such as citric acid and Ω-ascorbic acid, and an alkylbenzenesulfonic acid ( Japanese Patent Application Publication No. 5
7-15895), cleaning of iron-containing scale using a cleaning solution containing EDTA or its salts (e.g. salts of sodium, amines, ammonia, hydrazine, etc.)
Washing reverse osmosis membrane module with an aqueous solution of EDTA and citric acid (Special Publication No. 53-2814)
5) etc. are known.
（発明が解決しようとする問題点）
従来、缶型、スラッジなど主としてカルシウムや鉄を含
む析出物を化学的に除去するために酸を使って洗浄する
ことが行われている。塩酸のような無機強酸を使うこと
も行われ、又、クエン酸、グルコン酸、ポリリン酸、エ
チレンジアミン四酢酸のようなキレート性能を持つ化合
物の使用も行われているが１缶壁への侵蝕作用が無く短
時間で効果的に缶型、スラッジを溶解除去するためのス
ケール除去剤の開発は尚継続されており、本発明はかか
る意味合いにおいて、より効果的であって。(Problems to be Solved by the Invention) Conventionally, cans, sludge, etc. have been cleaned using acid in order to chemically remove precipitates mainly containing calcium and iron. Strong inorganic acids such as hydrochloric acid have been used, and compounds with chelating properties such as citric acid, gluconic acid, polyphosphoric acid, and ethylenediaminetetraacetic acid have also been used, but they have a corrosive effect on the can walls. The development of scale removers for effectively dissolving and removing can-shaped sludge in a short period of time is still continuing, and the present invention is more effective in this sense.
侵蝕作用のないスケール除去組成物を提供する。A scale removal composition without corrosive action is provided.
（問題点を解決するための手段）
本発明により提供される洗浄用組成物は、エチレンジア
ミン四酢酸、ニトリロ三酢酸、ヒドロキシエチルエチレ
ンジアミン三酢酸などのポリアミノポリカルボン酸の塩
（ここにおいて、塩としては、アンモニウム塩、ヒドラ
ジン塩、トリメチルアミン塩、トリエチルアミン塩又は
これらの複合塩などが挙げられる。溶液の安定性の点か
らは複合塩が好ましい、）と蓚酸、又は／及びその塩（
例えばアンモニウム、アミン、アルカリ金属塩）とを成
分として含んでいる。(Means for Solving the Problems) The cleaning composition provided by the present invention is a salt of polyaminopolycarboxylic acid such as ethylenediaminetetraacetic acid, nitrilotriacetic acid, hydroxyethylethylenediaminetriacetic acid (herein, the salt is , ammonium salt, hydrazine salt, trimethylamine salt, triethylamine salt, or a complex salt thereof. Complex salts are preferred from the viewpoint of solution stability) and oxalic acid or/and its salt (
For example, ammonium, amines, alkali metal salts) are included as components.
かかる成分の割合はポリアミノポリカルボン酸アミン塩
１重量部に対し、蓚酸０．０２重量部乃至０．３重量部
でよい、多いと難溶となり、少ないと効果は低下する。The ratio of such components may be 0.02 to 0.3 parts by weight of oxalic acid per 1 part by weight of the polyaminopolycarboxylic acid amine salt; if it is too large, it will become poorly soluble, and if it is too small, the effect will be reduced.
また、本発明に係る洗浄用組成物は、粉末混合物として
提供されることもないではないが、水溶液として提供さ
れるところ、その調整は、ポリアミノポリカルボン酸字
４中塩を１０％乃至６０％濃度になるように水に溶かし
、又は、水中で前記濃度になるようにポリアミノポリカ
ルボン酸の遊離酸にアンモニア又は／及びアうに加えて
溶解させることによって行われる。Further, the cleaning composition according to the present invention may not be provided as a powder mixture, but may be provided as an aqueous solution. This is carried out by dissolving it in water to the desired concentration, or by dissolving the free acid of the polyaminopolycarboxylic acid in water in addition to ammonia or/and silver to obtain the above concentration.
得られた溶液に第三成分を加えることは支障なく、例え
ば缶用、スラッジへの本発明組成物のなじみを良くする
ために加える浸透剤（例えばポリオキシエチレンアルキ
ルフェノールエーテル、ジオクチルスルホコハク酸ナト
リウム、ポリアクリル酸ソーダ）や、防蝕のために使用
されている防蝕剤（例えばベンゾトリアゾール、アセチ
レングリコール）などが用いられる。It is possible to add a third component to the obtained solution without any problem, for example, a penetrating agent (for example, polyoxyethylene alkylphenol ether, sodium dioctyl sulfosuccinate, polyoxyethylene alkylphenol ether, sodium dioctyl sulfosuccinate, etc.) which is added to improve the adhesion of the composition of the present invention to sludge for cans. Sodium acrylate) and corrosion inhibitors used for corrosion prevention (for example, benzotriazole and acetylene glycol) are used.
かくて、得られた本発明洗浄用組成物は、缶用、スラッ
ジなどを容易に溶かし、従って、缶壁からこれら障害物
を取り除くことができ、ボイラー。Thus, the obtained cleaning composition of the present invention can easily dissolve sludge, etc. for cans, and therefore can remove these obstacles from the walls of cans and boilers.
熱交換器などは、セツティングされたま＼で（つまり、
缶用、スラッジ除去のために解体することもなく）洗浄
され、熱交換効率の復旧につながる。The heat exchanger etc. remain set (in other words,
(for cans, without dismantling to remove sludge), leading to restoration of heat exchange efficiency.
以下、実施例を記述して本発明を具体的に説明する。Hereinafter, the present invention will be specifically explained by describing examples.
実施例１
水１００ ｇに、エチレンジアミン四酢酸４０ｇ、２８
％アンモニア水８ｇ、８０％ヒドラジン水溶液１７ｇを
加えて溶解し、均一溶液とした６次いで、これに蓚酸３
ｇを加え撹拌し１組成物を得た。Example 1 To 100 g of water, 40 g of ethylenediaminetetraacetic acid, 28
8 g of % ammonia water and 17 g of 80% hydrazine aqueous solution were added and dissolved to make a homogeneous solution.
g was added and stirred to obtain 1 composition.
実施例２
実施例１において、蓚酸の添加量を５ｇに変えたほかは
同様にして、組成物を得た。Example 2 A composition was obtained in the same manner as in Example 1 except that the amount of oxalic acid added was changed to 5 g.
実施例３
水１００ ｇに、エチレンジアミン四酢酸３８ｇ、２８
％アンモニア８ｇ、８０％ヒドラジン水溶液１６ｇを加
え均一溶液とした６次いで、これに蓚酸４ｇを加え撹拌
溶解し、ベンゾトリアゾール０゜５ｇ、ポリオキシエチ
レンアルキルフェノール０゜５ｇを加えて組成物を得た
。Example 3 To 100 g of water, 38 g of ethylenediaminetetraacetic acid, 28
8 g of % ammonia and 16 g of an 80% aqueous hydrazine solution were added to make a homogeneous solution.Next, 4 g of oxalic acid was added thereto and dissolved with stirring, and 0.5 g of benzotriazole and 0.5 g of polyoxyethylene alkylphenol were added to obtain a composition.
比較例１〜３
実施例１〜３における蓚酸に変えて、スルファミン酸３
ｇ、マロン酸３ｇ、クエン酸３ｇを使って組成物を造っ
た。Comparative Examples 1 to 3 Sulfamic acid 3 was used instead of oxalic acid in Examples 1 to 3.
g, malonic acid, 3 g, and citric acid, 3 g.
比較例４
実施例１における蓚酸量を０．６ｇとしたほかは同様に
して組成物を得た。Comparative Example 4 A composition was obtained in the same manner as in Example 1 except that the amount of oxalic acid was changed to 0.6 g.
Claims (1)
とを含んでなる洗浄用組成物A cleaning composition comprising a salt of polyaminopolycarboxylic acid and oxalic acid or/and a salt thereof
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP861487A JPS63178199A (en) | 1987-01-17 | 1987-01-17 | Cleaning composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP861487A JPS63178199A (en) | 1987-01-17 | 1987-01-17 | Cleaning composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63178199A true JPS63178199A (en) | 1988-07-22 |
Family
ID=11697827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP861487A Pending JPS63178199A (en) | 1987-01-17 | 1987-01-17 | Cleaning composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63178199A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990011972A1 (en) * | 1989-04-03 | 1990-10-18 | Mobil Oil Corporation | Sulfate scale dissolution |
| US4980077A (en) * | 1989-06-22 | 1990-12-25 | Mobil Oil Corporation | Method for removing alkaline sulfate scale |
| US5049297A (en) * | 1989-04-03 | 1991-09-17 | Mobil Oil Corporation | Sulfate scale dissolution |
| US5084105A (en) * | 1989-04-03 | 1992-01-28 | Mobil Oil Corporation | Sulfate scale dissolution |
| US5093020A (en) * | 1989-04-03 | 1992-03-03 | Mobil Oil Corporation | Method for removing an alkaline earth metal sulfate scale |
| US5111887A (en) * | 1989-04-03 | 1992-05-12 | Mobil Oil Corporation | Method for reducing radioactivity of oilfield tubular goods contaminated with radioactive scale |
| US5200117A (en) * | 1989-04-03 | 1993-04-06 | Mobil Oil Corporation | Sulfate scale dissolution |
| TR28277A (en) * | 1990-06-22 | 1996-04-17 | Mobil Oil Corp | Melting of sulphate stone. |
| EP0976853A1 (en) * | 1994-09-09 | 2000-02-02 | Mobil Oil Corporation | Method for removing alkaline earth metal sulfate scale from a boiler or heat exchanger with use of sonic energy |
| JP2016160457A (en) * | 2015-02-27 | 2016-09-05 | 荏原工業洗浄株式会社 | Scale remover and washing method of boiler using the scale remover |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5031300A (en) * | 1973-05-29 | 1975-03-27 | ||
| JPS5227401A (en) * | 1975-08-28 | 1977-03-01 | Iil Kk | Detergent composition for bottle-washing |
-
1987
- 1987-01-17 JP JP861487A patent/JPS63178199A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5031300A (en) * | 1973-05-29 | 1975-03-27 | ||
| JPS5227401A (en) * | 1975-08-28 | 1977-03-01 | Iil Kk | Detergent composition for bottle-washing |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990011972A1 (en) * | 1989-04-03 | 1990-10-18 | Mobil Oil Corporation | Sulfate scale dissolution |
| US5049297A (en) * | 1989-04-03 | 1991-09-17 | Mobil Oil Corporation | Sulfate scale dissolution |
| US5084105A (en) * | 1989-04-03 | 1992-01-28 | Mobil Oil Corporation | Sulfate scale dissolution |
| US5093020A (en) * | 1989-04-03 | 1992-03-03 | Mobil Oil Corporation | Method for removing an alkaline earth metal sulfate scale |
| US5111887A (en) * | 1989-04-03 | 1992-05-12 | Mobil Oil Corporation | Method for reducing radioactivity of oilfield tubular goods contaminated with radioactive scale |
| US5200117A (en) * | 1989-04-03 | 1993-04-06 | Mobil Oil Corporation | Sulfate scale dissolution |
| EP0626348A1 (en) * | 1989-04-03 | 1994-11-30 | Mobil Oil Corporation | Method of decontaminating earth and/or natural gas processing equipment |
| US4980077A (en) * | 1989-06-22 | 1990-12-25 | Mobil Oil Corporation | Method for removing alkaline sulfate scale |
| TR28277A (en) * | 1990-06-22 | 1996-04-17 | Mobil Oil Corp | Melting of sulphate stone. |
| EP0976853A1 (en) * | 1994-09-09 | 2000-02-02 | Mobil Oil Corporation | Method for removing alkaline earth metal sulfate scale from a boiler or heat exchanger with use of sonic energy |
| JP2016160457A (en) * | 2015-02-27 | 2016-09-05 | 荏原工業洗浄株式会社 | Scale remover and washing method of boiler using the scale remover |
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