JPS5951599B2 - Washing soap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning agent containing mountain bark acid and water.

Conventionally, inorganic acids have been used to clean scale and rust generated in boilers, ships, special buildings, and various metal equipment, and organic acids have also been used for cleaning that also serves as degreasing.

That is, this is a method in which acid is applied by spraying, brushing, etc., and then cleaning is performed. However, when cleaning vertical surfaces such as walls, downward facing surfaces such as ceilings, or the top surfaces of pipes, even if you spray or brush a non-viscous acid, it will immediately flow downward and will not be enough to remove scale and rust. Not only is it impossible to remove the acid, but the cleaning process is extremely dangerous as the acid falls downward.

Therefore, a method of imparting a certain degree of viscosity to the acid was devised. Methods for thickening inorganic acids include polyacrylic acid,
A method of adding a polymer such as polymethacrylic acid is known (Japanese Patent Publication No. 49-5511). It is also known to add cellulose and starch derivatives, but since these organic polymer compounds are hydrolyzed in acidic solutions, their viscosity changes significantly over time, and the viscosity drops significantly after three months. The original purpose will not be achieved. Furthermore, when organic acids are used, there are problems such as esterification, and a sufficient thickening effect is not exhibited. In view of these circumstances, the inventors of the present invention have made extensive studies and have found that in both inorganic and organic acids, a sufficient thickening effect can be achieved simply by adding mountain bark, and that a sufficient thickening effect can be achieved by simply adding mountain bark to both inorganic and organic acids. It was discovered that the cleaning agent exhibits a significantly superior cleaning effect than conventional cleaning agents, and this led to the completion of the present invention.

That is, the present invention contains mountain bark, acid and water,
The cleaning agent has a mountain bark ratio of about 0.05 to 50% by weight and an acid concentration of 0.1 to 36 normal.

Acids used in the present invention include inorganic acids such as hydrochloric acid, phosphoric acid, sulfuric acid, nitric acid, hydrofluoric acid, chloric acid, bromic acid, and iodic acid; for example, formic acid, acetic acid, benzoic acid, lactic acid, glycolic acid, and methoxyacetic acid. , monocarboxylic acids such as thioglycolic acid, such as oxalic acid, malonic acid, succinic acid,
Dicarboxylic acids such as glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, phthalic acid, isophthalic acid, terephthalic acid, such as methanesulfonic acid, benzenesulfonic acid,
Sulfonic acids such as P-toluenesulfonic acid, naphthalene-a-sulfonic acid, naphthalene-β-sulfonic acid,
High molecular weight acids (molecular weight approximately 300-450) such as barbituric acid, uric acid, hydrolysates of polymaleic anhydride, polyacrylic acid, alkylbenzenesulfonic acids, etc.
Organic acids such as These inorganic acids and organic acids may be used alone or in combination of two or more. Furthermore, a mixture of an inorganic acid and an organic acid may be used. The above-mentioned inorganic acids and organic acids may be either liquid (aqueous solution) or fixed. Generally, the concentration of acid is 0.1 normal to 36
Although it is about the normal range, it is particularly preferably about 1 normal to 20 normal. The mountain bark used in the present invention is a clay mineral that has many hydroxyl groups on its surface, and contains hydrated magnesium.
Silicates (HydrOusmagnesiumsi)
sepiolite (BepiOlite)
, hydrated magnesium aluminum silicate (Hyd
rOusmagneslumaluminumsill
Attapulgite (Cate)
ite) (also known as: palygorskite)
kite).

Commonly known as Mountain Cork (MOuntaincOrk)
, Mountain leather
r), Mountain Wood (MOuntainwOOd)
It is a general term for minerals called meerschaum, and meerschaum in Japan is also a type of this mineral. In the present invention, magnesium trisilicate (2Mg0.3Si0) is used.

・5H. 0) can also be used.

The cleaning agent of the present invention is obtained by mixing mountain bark acid and water. Specifically, methods include, for example, adding mountain bark to an acid aqueous solution of an appropriate concentration and mixing and stirring; or dispersing mountain bark in water in advance, then adding acid to this and mixing while adjusting the acid concentration. When using a solid organic acid, one method is to mix mountain bark and the organic acid in advance and add water to this, but take into account that the acid will corrode the stirring device. In this case, it is preferable to first disperse mountain bark in water and then add acid to the mixture. The amount of mountain bark varies depending on the type and concentration of acid, so it cannot be determined with certainty, but the weight of mountain bark is about 0.05 to 50. % by weight, especially about 0.1
~10% by weight is preferred. In addition to acid, mountain bark, and water, the cleaning agent of the present invention may contain, for example, fragrances, dyes, inhibitors, abrasives (
Examples: a-alumina, acid clay), water-soluble adhesives, rust preventives, solvents (e.g. dimethyl sulfoxide) and additives (e.g.
urea) and the like. The cleaning agent of the present invention thus obtained is 1. stable for a long period of time and does not lose its high viscosity; 2.
It is more effective in removing rust and scale than conventional cleaning agents, and rinsing with water after cleaning is also extremely easy.
．． It has the characteristics of capturing the fine powder produced when removing rust and scale without leaving any residue on the mountain.

Next, the present invention will be specifically explained with reference to Examples. Example 1 5g of Mountain Leather (Sepiolite 2Mg0.
3Si0.

・5H. Add 50ml of water to 0) and mix with a household mixer to obtain a paste-like water dispersion of mountain bark.

While stirring, 45 g of 95% by weight concentrated sulfuric acid is gradually added to obtain a thickened liquid. When I applied this composition to a rusty iron plate and stood the iron plate upright, the liquid did not drip. J Example 2 Water was added to 100 g of mountain bark (palygorskite) to make a total amount of 400 g.

Separately, 150 g of 35% by weight hydrochloric acid, 400 g of 90% by weight phosphoric acid and 250 ml of water are mixed. These two liquids are combined and mixed uniformly using a high speed mixer.
When this liquid is left for a day and night, a paste-like composition is obtained. After applying this liquid evenly to a rusted iron plate with a brush to a thickness of 10 mm, the composition did not fall off even when the iron plate was turned upside down. Further, the acid in the composition did not flow. Approximately 10 minutes after application, the iron rust was completely removed when wiped with a rag. Even if this iron plate was left for one week, no rust occurred. Example 3 20 ml of 35% by weight hydrochloric acid and 80 ml of 90% by weight phosphoric acid
Mix with 1.

Separately, 1 g of dimethyl sulfoxide was added to 200 ml of a purified dispersion of Mountain Leather (containing 10% by weight of sepiolite with a purity of 98% by weight). When the mixed acid solution is added to the Mountain Leather dispersion and stirred with a household mixer, a paste-like composition is obtained.
Apply this paste-like composition to the threaded parts of 12 mm diameter bolts and nuts that have rusted and cannot be removed.

No matter which direction the bolt/nut was oriented, the composition did not come off from the applied area. After leaving it for about 15 minutes, the acid that seeped into the rust removed the rust, allowing it to be broken down into bolts and nuts. Example 4 3 g of a hydrolyzate of polymaleic anhydride having a molecular weight of about 400 is placed in 100 ml of 20% by weight phosphoric acid and left for a while.

Add 5 g of palygorskite powder to this and stir well. After standing overnight, the thickened mixture is rubbed and one drop of alkylbenzene sulfonic acid (Cl2) is added, allowing it to naturally diffuse to obtain a thickened composition. When this composition was evenly sprayed onto a rusted zinc-coated iron plate, it did not run off even when the iron plate was turned upside down. After about 15 minutes, this composition was washed with water, and a clean iron plate with both rust and surface zinc removed was obtained. When the cleaning waste liquid was examined, no zinc or iron ions were detected, and it was found that they were converted into salt and adsorbed to the mountain bark. Example 5 5g of mountain bark (98% pure sepiolite) for 100m
Add it to the water from step 1 and mix it with a household mixer until it is well dispersed.

When 70 ml of 90% by weight phosphoric acid is added to this while stirring, a paste-like composition is obtained. Add this to 20g of acid clay
No decrease in viscosity was observed even with the addition of . This composition was brushed onto a rusted iron plate to a thickness of approximately 2 mm. Even when this iron plate was erected, the composition did not drip. If you leave this iron plate for about 60 minutes, the water will evaporate and the rust-containing powder will fall to the bottom. When this powder was removed with a brush, the surface of the iron plate used to be slightly black, but after that it became 1
No new rust appeared even after a week. When the powder containing rust is put into a large amount of water again, it becomes FePO4.2H.
20, it was possible to separate the mountain bark dispersion and the red acid clay, but it was not possible to separate FepO4.2H20 from the mountain bark.

Claims (1)

[Claims] 1 Contains mountain bark, acid and water, the proportion of mountain bark is about 0.05 to 50% by weight, and the concentration of acid is 0.1 to 36%.
Cleaning agent as prescribed.