Acid inhibitor compositions for metal cleaning and/or pickling

A technology of acid inhibitors and compounds, applied in the preparation of detergent compositions, surface active detergent compositions, detergent mixture compositions, etc., capable of solving toxic and flammable problems

Inactive Publication Date: 2010-12-22
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in many cases, the above formulations contain undesirably high concentrations of certain substances such as formaldehyde or acetylenic alcohols, which are toxic and / or flammable and therefore have environmental, health and safety concerns strict regulations

Method used

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  • Acid inhibitor compositions for metal cleaning and/or pickling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] To prepare the polyamino-aldehyde resins used in the formulation of acid inhibitor concentrates according to the invention, 100 parts by weight of an aqueous solution of CHEMQUAT SP-1060 (a polyethylene polyamine quaternized with benzyl chloride; solids content 60% ) is mixed with the aqueous solution of 40wt% glyoxal of 30 parts by weight. An exothermic reaction obviously occurred, generating the 1640cm in the FTIR spectrum -1 Dark solution with obvious absorption.

Embodiment 2

[0058] To prepare the acid inhibitor concentrates of the present invention, the following components are combined and mixed (preferably added in the following order) to form a homogeneous solution:

[0059] Deionized water 65.05wt%

[0060] Hexamethylenetetramine 16.0wt%

[0061] CHEMEEN C-12G Ethoxylated Cocoamine 1.75wt%

[0062] Hydrochloric acid (20 degrees Baume) 9.75wt%

[0063] Acetic acid (56%) 0.45wt%

[0064] Corrosion Inhibitor CES-90 1 7.0wt%

[0065] 1 Supplied by Consulting Engineering Services, LLC; reported to contain 59-61% benzyl chloride quaternized polyethylene polyamine and glyoxal (CAS 78330-33-3), less than 4% tetraethylene pentamine, Sanya Ethyltetramine less than 1% and 39-41% water

[0066] To prepare the metal cleaning or pickling solutions of this reference, one part by volume of the acid inhibitor concentrate described above may, for example, be mixed with from 200 to 20,000 parts by volume of an aqueous solution containing 10...

Embodiment 3

[0069] Solution A was prepared by mixing 0.1710 grams of CHEMQUAT SP-1060 quaternized polyethylene polyamine with 2 L of 10% w / v aqueous hydrochloric acid.

[0070] Solution B was prepared by mixing 0.222 g of the polyamino-aldehyde resin in Example 1 with 2 L of 10% w / v aqueous hydrochloric acid.

[0071] First prepare the mixture of 130 parts by weight of polyamino-aldehyde resin in Example 1 and 20 parts by weight of CHEMEEN C-12G ethoxylated fatty amine, then mix 0.257 grams of this mixture with 2L of 10% weight / volume hydrochloric acid to prepare Solution C is obtained.

[0072] Cold rolled steel (alloy 1008) coupons measuring 0.032 x 2 x 4 inches were cleaned with fresh isopropanol, dried and weighed (to the nearest 0.1 mg). Test pieces (2 pieces per test) were hung on plastic-coated hooks through 1 / 4" punched holes and placed in each of Solutions A, B, and C for 30 minutes. The solutions were incubated at 180°F with magnetic stirring Rod agitation (solution flow rate ...

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PUM

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Abstract

An acid inhibitor concentrate is provided which contains water, at least one polyamino-aldehyde resin such as a quaternized polyethylenepolyamine-glyoxal resin, and at least one compound selected from the group consisting of acetylenic alcohols, ethoxylated fatty amines, ethoxylated fatty amine salts, and aldehyde-releasing compounds (such as hexamethylenetetrarnine). Such concentrates form useful metal cleaning and pickling solutions when combined with aqueous acid, wherein such solutions, when contacted with a metal surface, are effective in removing scale, smut and other deposits from the metal surface but exhibit a reduced tendency for the aqueous acid to attack or etch the metal itself.

Description

technical field [0001] The present invention relates to acid inhibitor concentrates and solutions prepared therefrom for pickling and / or cleaning of metal surfaces. Background technique [0002] It is known to use certain compounds or mixtures of compounds in acidic solutions for cleaning or pickling metal surfaces to remove unwanted oxides, scale and other undesirable corrosion products thereon. The compounds described above slow down the tendency of acidic cleaning solutions to corrode metal surfaces without interfering with the solution cleaning operation. Compounds that perform this function are often referred to as "acid inhibitors". In the absence of acid inhibitors, acidic metal cleaning or pickling solutions can cause significant loss of base metal while damaging the metal surface due to excess hydrogen gas generation. [0003] Corrosion of metal surfaces by acidic cleaning solutions is due to the presence of acid in the solution. The acids used in these metal cle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/32C08L61/00
CPCC08G12/06C11D3/0073C11D3/164C23G1/08C11D3/2075C11D11/0029C23G1/10C08G73/02C23G1/125C23G1/06C08G73/0213C11D1/44C11D3/042C11D3/3703
Inventor D·R·麦克科米克T·S·史密斯
Owner HENKEL KGAA
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