RU2533418C2 - Bleaching, washing and disinfecting composition - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to bleaching, washing and disinfecting compositions. Described is a composition, containing, wt %: sodium hypochlorite in terms of active chlorine 10.0-12.0; sodium hydroxide 1.5-2.0, sodium carbonate 1.1-1.4, 2,6-ditertbutyl-4-methylphenol or 2,6-ditert-butylphenol 0.05-0.3, water - the remaining part.

EFFECT: increased efficiency of the composition, as well as the storage stability of sodium hypochlorite and the stability of the claimed composition.

2 tbl, 4 ex

Description

The invention relates to bleaching, washing and disinfecting compositions having a long shelf life.

Known concentrated whitening, washing and disinfecting composition containing, wt.% (TU 6-40-00209645-56-92):

Sodium hypochlorite calculated

active chlorine 7.0-8.5 Sodium hydroxide 1.0-1.5 water rest

Known tool is not stable during storage. In particular, it is allowed to reduce the mass concentration of active chlorine of sodium hypochlorite during the shelf life (6 months) from 7.5-8 wt.% To 5 wt.%.

Known concentrated whitening, washing and disinfecting composition containing sodium hypochlorite, sodium hydroxide, liquid sodium glass, di- or trisodium phosphate and demineralized water in the following ratio of components, wt.% (SU 730803, publ. 30.04.1980, bull. No. 16) :

Sodium hypochlorite calculated

active chlorine 13.0-15.0 Sodium hydroxide 2.2-2.5 Liquid sodium glass 0.8-1.2 di- or trisodium phosphate 0.8-1.2 water rest

The closest to the claimed in terms of essential features and the achieved result is a bleaching, washing and disinfecting agent having the following composition with a ratio of components, wt.% (RU 2161186, publ. 27.12.2000, bull. No. 36):

Sodium hypochlorite calculated

active chlorine 10.0-12.0 Sodium hydroxide 1.0-1.5 Sodium carbonate 0.5-10.0 sodium styrene maleate 0.05-0.2 water rest

The disadvantage of this composition is the insufficiently high stability during storage as a result of not quite well selected recipes. In addition, sodium styrene maleate is not currently produced in industry.

The objective of the invention is the development of a bleaching, washing and disinfecting composition and expanding the range of bleaching, washing and disinfectants.

The technical result is an increase in the effectiveness of the proposed composition and increased stability of sodium hypochlorite and the proposed composition.

The above technical result is achieved by the development of the composition (formulation) of a bleaching, washing and disinfectant containing the following components, wt.%:

Sodium hypochlorite calculated 10.0-12.0

active chlorine

Sodium hydroxide 1.5-2.0 Sodium carbonate 1.1-1.4

2,6-ditretbutyl-4-methylphenol (ionol) or

2,6-ditretbutylphenol 0.05-0.3 water rest

The test of the bleaching ability of the composition is carried out by bleaching tissue from cellulose fiber in a bath containing 0.04 wt.% Active chlorine, with the introduction of the proposed composition at 40 ° C for 20 min and at 20 ° C for 1 h. In the first case the fabric has a whiteness of 83.5% (viscosity of a 0.1% copper-ammonia cellulose solution of 0.58), and in the second 81.6% (viscosity of a 0.1% copper-ammonia cellulose solution of 0.98) .

Whitening at room temperature slightly reduces the bleaching effect, but significantly reduces the destruction of cellulose, which makes it possible to use the composition at home and facilitates the work of workers.

The washing ability of the proposed composition on enameled surfaces and the cleaning ability on plastic surfaces is 88%. The washing ability of the known composition in similar conditions is 68%.

Stability is determined by keeping the formulations obtained for 120 days at room temperature by periodically determining the concentration of active chlorine.

The increase in stability (PS) of sodium hypochlorite is calculated by the formula

, $$P\mathrm{FROM}=\frac{x_{\mathrm{one}}-x_2}{x_{\mathrm{one}}}\cdot \mathrm{one\; hundred}\%$$

,

where x ₁ is the amount of decrease in the concentration of active chlorine of an unstabilized composition (TU-6-40-002-09645-56-92) for 120 days of aging; x ₂ - the amount of decrease in the concentration of active chlorine of a stabilized composition for 120 days of aging.

2,6-ditretbutyl-4-methylphenol (ionol) or 2,6-ditretbutylphenol exhibit a stabilizing effect of the proposed composition during storage.

Examples of the proposed composition.

Example 1. In a reactor with a stirring device, components of the composition are loaded in any sequence, wt.%: Sodium hypochlorite in terms of active chlorine 10.0, sodium hydroxide 1.5, sodium carbonate 1.1, 2,6-ditretbutyl-4- methylphenol (ionol) 0.05. The contents of the reactor are stirred at a temperature of 15-20 ° C for 20 minutes

Example 2. Under the conditions of example 1, components containing wt% are loaded into the reactor: sodium hypochlorite in terms of active chlorine 12.0, sodium hydroxide 2.0, sodium carbonate 1.4, 2,6-ditretbutylphenol 0.3. The mixture is stirred at a temperature of 30-40 ° C for 40 minutes

Example 3. Analogously to example 1, the composition components are loaded into the reactor, wt.%: Sodium hypochlorite in terms of active chlorine 11.0, sodium hydroxide 1.7, sodium carbonate 1,2, 2,6-ditretbutyl-4-methylphenol ( ionol) 0.18. The mixture is stirred at a temperature of 25-30 ° C for 30 minutes

Example 4. Analogously to example 1, in the reactor load, wt.%: Sodium hypochlorite in terms of active chlorine 11.0, sodium hydroxide 1.6, sodium carbonate 0.7. The mixture was stirred at room temperature for 15 minutes.

The results of the examples are summarized in table 1 and table 2. Table 1 shows the composition, wt.%, Stability results,%, table 2 - the stability of the composition during storage.

Table 1 Composition stability No. p / p Components and indicators Composition, wt.% one 2 3 four* one Sodium hypochlorite based on active chlorine 10.0 12.0 11.0 11.0 2 Sodium hydroxide 1,5 2.0 1.7 1,6 3 Sodium carbonate 1,1 1.4 1,2 0.7 four 2,6-ditretbutyl-4-methylphenol or 2,6-ditretbutylphenol 0.05 0.3 0.18 - 5 Water up to 100 up to 100 up to 100 up to 100 6 The increase in stability,% 51.9 55.0 56.1 0 * unstabilized composition.

table 2 Storage stability No. p / p Exposure time in days Composition, wt.% one 2 3 four* concentration of sodium hypochlorite, wt.% one 0 10.0 12.0 11.0 11.0 2 twenty 9.82 11.80 1,0,76 10.62 3 40 9.65 11.64 10.44 10.48 four 60 9.45 11.36 10.23 9.02 5 80 9.10 11.05 10.12 8.74 6 120 8.75 10.85 9.86 8.40 Reduced active chlorine concentration 1.25 1.15 1.14 2.6 The increase in stability,% 51.9 55.0 56.1 0 * unstabilized composition.

Claims (1)

The composition is whitening, washing and disinfecting, containing sodium hypochlorite, sodium hydroxide, sodium carbonate and water, characterized in that it additionally contains 2,6-ditretbutyl-4-methylphenol or 2,6-ditretbutylphenol in the following ratio, wt.%:
Sodium hypochlorite calculated
active chlorine 10.0-12.0 Sodium hydroxide 1.5-2.0 Sodium carbonate 1.1-1.4
2,6-ditretbutyl-4-methylphenol or
2,6-ditretbutylphenol 0.05-0.3 water rest