Acidic disinfectant and preparation method thereof

Abstract

The invention discloses an acidic disinfectant and a preparation method thereof; the acidic disinfectant comprises the following major components in parts by weight: 18 parts of water, 10 parts of 90 wt% acetic acid, 72 parts of 35 wt% hydrogen peroxide, 2-3 parts of 90 wt% sulfuric acid, 1-10 parts of nonionic surfactant, 1-10 parts of stabilizer, 10-20 parts of C8-C16 alkylaryl sulfonic acid, 1-10 parts of iminodisuccinic acid, 1-5 parts of sodium sulfate or carboxymethylcellulose, 1-10 parts of glucose pentaacetate and 1-8 parts of cocoyl hydroxyethyl imidazoline, wherein the nonionic surfactant is an ethylene oxide / epoxypropane segmented copolymer started / ended from C6-C12 aliphatic alcohol; and the stabilizer is a polyhydroxy, polycarboxylic and multi-ligand compound which is generated by a condensation reaction of ethylenediamine tetraacetic acid and phosphoric acid with molar ratio of 1:1.

Description

technical field [0001] The invention belongs to the field of chemical preparations, and in particular relates to an acidic disinfectant and a preparation method thereof. Background technique [0002] Peracetic acid is an ancient disinfectant. Its preparation method is: mix the reserved glacial acetic acid and hydrogen peroxide according to the formula ratio, stir, then add a certain amount of sulfuric acid to stir again until uniform, and place it for 24 to 48 hours. For testing, when glacial acetic acid reacts with hydrogen peroxide to generate the highest concentration of peroxide, then add 8-hydroxyquinoline or urea to make the liquid turn yellow, take out the supernatant, and then dilute it in a certain amount before use. [0003] The product that above-mentioned this production method generates has the following defects: 1. poor stability: the shelf-life is only three months, and the concentration drop rate of peracetic acid after more than half a year is 50%, which is ...

AI Technical Summary

Problems solved by technology

[0003] The product produced by the above-mentioned production method has the following defects: 1. poor stability: the shelf life is only three months, and the concentration of peracetic acid drops by 50% after more than half a year, which is not suitable for long-term preservation

② After the concentration is reduced, the bactericidal effect will naturally decrease

3. The cost of production is high. If 8-hydroxyquinoline or urea is not added in this production process, glacial acetic acid and hydrogen peroxide contain a large amount of metal ions, which can accelerate the reduction of product stability, which greatly increases the cost of the product and the relative profit. Significantly reduced, not convenient for production and sales

④According to the physical and chemical properties of peracetic acid, it is easy to decompose naturally during storage. In addition, when glacial acetic acid is mixed with hydrogen peroxide, more metal ions are produced, and it is easier to produce accelerated decomposition. If the acceleration is too strong, it is easy to produce redox reaction, and it is easy to produce explosive decomposition, which is more dangerous in storage and difficult to promote

However, its stability can generally only be guaranteed for about one month, which cannot meet the objective needs of the market.

It is precisely because of the above problems that domestic peracetic acid is usually packaged in a binary package. The effective peracetic acid content of binary peracetic acid is unstable and very corrosive (containing about 3% sulfuric acid). It is inconvenient to use and must be activated on the same day. There are many inconveniences after use, and it is generally only used on a small scale by medical institutions.

The research on monobasic peracetic acid can solve the problems existing in binary finished products, but the stability of monobasic peracetic acid has always been a big technical problem

[0007] The above patents have their own characteristics in improving the concentration or stability of peracetic acid, most of which are complicated in production technology, must use rectification tower rectification or ion exchange resin, and the production cost is high; or need to add sulfuric acid or heterocyclic compounds (such as 8- hydroxyquinoline, dipicolinic acid) and there are food safety hazards

Its overall stability or security still does not meet production requirements

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