Biocorrosion inhibitor for metal

一种生物腐蚀、金属的技术，应用在杀生物剂、杀生剂、用于生物控制的化学品等方向，能够解决发展机制未阐明等问题，达到保存稳定性优越、高度环境和职业安全性、金属生物腐蚀抑制能力优越的效果

Inactive Publication Date: 2016-06-29
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, development mechanisms etc. have not yet been elucidated

Method used

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  • Biocorrosion inhibitor for metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] [Preparation of a mixture of 1,9-nonanedialdehyde (NL) and 2-methyl-1,8-octanedial (MOL)]

[0071] By the method described in JP-B-2857055, a mixture of 1,9-nonanedialdehyde (hereinafter referred to as NL) and 2-methyl-1,8-octanedial (hereinafter referred to as MOL) was prepared. The mass ratio of NL to MOL in the mixture is NL / MOL=85 / 15.

[0072] [Preparation of inorganic salt seawater matrix (solution A)]

[0073] Milli-Q water 970ml, NaCl19.0g, MgCl 2 ·6H 2 O2.6g, CaCl 2 2H 2 O0.15g, Na 2 SO 4 4.0g, NH 4 Cl0.25g, KH 2 PO 4 4.0g, KCl0.5g, HEPES (2-[4-(2-hydroxyethyl)-1-piperazinyl]ethanesulfonic acid) 23.8g are mixed and dissolved in anaerobic chamber, to prepare inorganic salt seawater substrate ( Solution A).

[0074] Milli-Q water is ultrapure water prepared using a device manufactured by Merk Millipore (for example, Milli-Q Integral 10).

[0075] [Preparation of sodium bicarbonate solution (solution C)]

[0076] NaHCO 3 (2.52 g) was dissolved in Mill...

Embodiment 2

[0086] Oral toxicity measurement, toxicity test to algae, sterilization test to sludge and biodegradability test were performed on NL, MOL and glutaraldehyde. The test method and results are shown below.

[0087]

[0088] The test substances were emulsified and dispersed in 2%-gum arabic aqueous solution (containing 0.5%-Tween80) and force-administered to 6-week-old male CRj:CD(SD) rats with an oral gavage needle once a day for 14 sky. Body weight changes and general condition were observed during the administration period. Rats were fasted for one day from the last administration day (free access to drinking water), and dissected, blood samples were collected (various blood tests), and mass measurements of major organs were performed on the day following the last administration. In addition, histopathological examination (HE-stained sheet sections by light microscopy) of liver, kidney, spleen and testis was performed. The dose was 1000, 250, 60, 15 or 0 mg / kg / day (amount...

Embodiment 3

[0133]

[0134] The following test solutions were respectively placed in vial containers, the gas space part was replaced with nitrogen, and tightly sealed, and stored at 60°C. The NL / MOL or glutaraldehyde content of each test solution at the beginning of storage was regarded as 100%, and the content changes after 5 days, 12 days and 21 days were observed by gas chromatography using an internal standard according to the analytical curve method. The results are shown in Table 4.

[0135] Test solution 1: mixture of NL and MOL (mass ratio: 92 / 8)

[0136] Test solution 2: mixture of NL / MOL / water=91:7:2 (mass ratio)

[0137] Test solution 3: 50% glutaraldehyde aqueous solution (supplied by Tokyo Chemical Industry Co., Ltd.)

[0138] [Gas Chromatography Analysis Conditions]

[0139] Analytical instrument: GC-14A (manufactured by Shimadzu Corporation)

[0140] Detector: FID (Flame Ionization Detector)

[0141] Column used: G-300 (length 20m, film thickness 2μm, inner diameter...

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Abstract

The purpose of the present invention is to provide a biocorrosion inhibitor for metals which is highly safe from the standpoint of environmental and occupational safety. The biocorrosion inhibitor for metals contains 1,9-nonanedial and / or 2-methyl-1,8-octanedial as the active ingredient.

Description

technical field [0001] The present invention relates to agents for inhibiting the biocorrosion of metals. Background technique [0002] Biocorrosion refers to a corrosion phenomenon caused directly or indirectly by the action of microorganisms present in the environment, and a number of research cases have been reported (for example, Non-Patent Document 1, etc.). However, the development mechanism etc. have not yet been elucidated. In recent studies, it has been reported that when two or more types of microorganisms (eg, sulfate-reducing bacteria and methanogenic bacteria, etc.) participate in biocorrosion, in some cases, the action of these microorganisms synergistically promotes corrosion. [0003] In recent years, fracturing of rock beds with high-pressure water or the like has been performed in extraction of fossil fuels (for example, oil, natural gas, shale oil, shale gas, etc.). Biocorrosion occurs on iron pipes and the like as a flow path of the high-pressure water,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N35/02A01P3/00C23F11/00A01P13/00C23F11/12
CPCA01N35/02A61L2/16C07C47/12C23F11/122
Inventor 藤纯市铃木雄高千田浩介若井晓
Owner KURARAY CO LTD
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