Detergent ms-11 for membrane plants

 

(57) Abstract:

The inventive detergent for membrane plants contains disodium salt of ethylenediaminetetraacetic acid 8-35%., polietilenglikolya ether synthetic primary fatty alcohols fraction C C 1-6%. , sodium tripolyphosphate, 10-40%. and sodium hydroxide to 100%. table 2.

The invention relates to purification equipment, in particular ultrafiltration equipment operating on raw milk.

Known detergent for membrane systems containing complexing agents and polietilenglikolya ether synthetic primary fatty alcohol fractions From 10 To 18. (1) as the complexing agents used or sodium tripolyphosphate or sodium salt of ethylenediaminetetraacetic acid. In addition, the product contains sodium carbonate.

Use this tool for cleaning the membrane equipment for raw milk, will not effectively clean protein contamination from the surface of the ultrafiltration membranes. Moreover, contained in the well-known detergent sodium carbonate forms are available in milk calcium n The aim of the invention is to increase detergency tools.

To achieve this goal detergent for membrane systems containing complexing agents and polietilenglikolya ether synthetic primary fatty alcohol fractions From 10 To 18, as complexing agents contain sodium tripolyphosphate, and the disodium salt of ethylenediaminetetraacetic acid and further comprises sodium hydroxide in the following ratio of components, wt.

the disodium salt of ethylenediaminetetraacetic acid 8 35

sodium tripolyphosphate 10 40

polietilenglikolya ether synthetic primary fatty alcohols fraction 10 18 1 6

the sodium hydroxide to 100.

The cleanser is a white powder, which can be obtained in industrial conditions on standard equipment.

We offer detergent is used in the form of a 0.5 to 2 aqueous solution for recovery of ultrafiltration installations, equipped with synthetic ultrafiltration membranes. As the membrane is the most vulnerable place in the setting, to the cleaning means special requirements, which are that it not only should effectively clean surfaces the wounds and make more pollution, can reduce the performance of the membranes and, consequently, the entire installation.

The effectiveness of the proposed and known detergent appreciate the ability to restore membrane permeability for water after rinsing in the same conditions contaminants from the membrane surface using the appropriate detergent. The evaluation method consists in the following. Through laboratory installation comprising three serially connected cells placed in them ultrafiltration membranes, consistently miss the liquids and selecting the filtrate that passed through the membrane, estimate the change in time of their permeability. First pass distilled water to assess the permeability of pure membranes, then artificially contaminate the membrane model fluid, representing a 6% solution of the dry protein concentrate, derived from cheese whey. While on the surface of the membrane layer is formed precipitate, consisting of whey proteins, which are trapped by the membrane. Then conduct stage washing of the membrane with the appropriate detergent at a temperature of 60oC for a specified time (15 min). Then at the conclusion of Yunosti cleaning of the membranes. For each subsequent experience using fresh membrane.

The effectiveness of the detergent assessed using the K-factoreffrepresenting the ratio of permeability from contamination of the membrane to the permeability of the fresh membrane on the water: the greater the value TOeffthe more effective washing.

Example: Experienced a 1% solution offer detergent (MS-11), containing in wt. sodium hydroxide 45,5, Trilon B 21,5, sintana ALM-10-3, sodium tripolyphosphate, 30.

To evaluate the effectiveness of the composition was determined by the initial permeability Qstartwater ultrafiltration membranes, which amounted to the same samples of membranes in three different cells, respectively 120, 125, 127 l/m2hour.

After contamination of the membranes and washing according to the method described above, the permeability of the membranes in distilled water were respectively up to 115, 119, 117 l/m2hour. The average permeability is Qstart124 l/m2h and Qthe end.117 l/m2hour. Thus, the efficiency ratio TOeffQthe end./ Qstart0,94.

The formulations described means are presented in table. 1.

Values of the coefficient of perfor the Directors are listed in the table. 2. In table. 2 shows also the values of Kefffor the well-known detergent at different solution concentrations.

Were tested at 0.5-2% aqueous solutions, we offer detergent. They all have a high regenerative ability in comparison with the known detergent.

Detergent for membrane systems containing complexing agents and polietilenglikolya ether synthetic primary fatty alcohols fraction10WITH18, characterized in that as complexing agents it contains sodium tripolyphosphate, and the disodium salt of ethylenediaminetetraacetic acid, and additionally, it contains sodium hydroxide in the following ratio, wt.

The disodium salt of ethylenediaminetetraacetic acid 8 35

Sodium tripolyphosphate 10 40

Polietilenglikolya ether synthetic primary fatty alcohols fraction10WITH181 6

The sodium hydroxide To 100,

 

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SUBSTANCE: claimed composition contains (g/l): sodium hydroxide 6.05-12.05; sodium carbonate 5.25-10.75; sodium silicate 0.27-0.47; sodium tripolyphosphate 1.20-2.70; propylene trimer-based oxyethylated monoalkyl phenol containing 12 mol of ethylene oxide in molecule 0.073-0.158; propylene trimer-based oxyethylated monoalkyl phenol containing 6 mol of ethylene oxide in molecule 0.054-0.106; antifoaming agent 0.011-0.023; and balance to 1 l: water, wherein mass ratio of surfactant mixture to antifoaming agent is 11.5:1. Composition of present invention is useful in degreasing of rolled metal in rolls at high velocity (20-30 s) continuous treatment before coating (zinc plating, insulated coating, etc.) and affords the ability to provide metal surface of high purity.

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