RU2525553C1 - Method of step-by-step obtaining composition of thickener of anti-icing liquid and thickener composition - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: method of a step-by-step obtaining of a thickener of an anti-icing liquid and the thickener composition includes at the first stage loading of propylene glycol 7.6-11.04 wt.p., water 84.6-89.25 wt.p. and a foam-extinguisher 0.05-0.1 wt.p., mixing them in a rotary mixer with a frequency of 50-60 Hz for 10-15 minutes after loading of the components. At the second stage the mixture is mixed at a frequency of 40-60 Hz and circulation at a frequency of 30-40 Hz, and then a polymer 1.4-2.1 wt.p. is added through a loading bunker in a suction line of a circulation system and circulation is realised at 10-16 Hz, and the time of the second stage constitutes nearly 50-65 minutes. At the third stage soaking without mixing and circulation for 4-7 hours are performed, at the fourth stage mixture is mixed at 40-60 Hz with circulation at 30-50 Hz for 5-15 minutes after loading of SAS 0.1-0.2 wt.p., propylene glycol 0.32-0.46 wt.p., corrosion inhibitor 1.2-1.5 wt.p. Then stabilisation is carried out without mixing and circulation for 10-15 hours with inaccuracy of propylene glycol loading and water quantity ±0.1% and other components ±2%. Also claimed is the composition of the thickener for the anti-icing liquid of the composition, wt.p. propylene glycol 8.0-11.5; water 89.25-84.6; polymer sodium polyacrylate 1.4-2.1; SAS oxyethylated nonylphenol or ethoxylated octylphenol 0.1-0.2; foam-extinguisher polydimethylsiloxane 0.05-0.1; corrosion inhibitor 2-butyne 1,4-diol (50% water solution) 1.2-1.5.

EFFECT: invention makes it possible to obtain the thickener for the anti-icing liquid, which increases a degree of accuracy of obtaining the required viscosity for the anti-icing liquid.

2 cl, 5 tbl

Description

The invention relates to the production of a thickener for anti-icing liquids (RLF), which has the ability to remove snow-ice deposits (SLO) from the aircraft surface and provide long-term (up to 12 hours) anti-icing protection of aircraft surfaces under ground icing conditions.

A method is known from the prior art for producing a coolant for aircraft surfaces under icing conditions (RF patent 2141990, 1999), which describes anti-icing liquid for ground processing of an aircraft based on glycol and water, which does not contain a thickener. The required viscosity parameters of the liquid were achieved due to the use of one nonionic surfactant from the group of fatty alcohols and alkoxylated with low molecular weight alkoxide of fatty alcohols and one surfactant from the group of alkaryl alkylaryl sulfonates as a surface-active component. The disadvantage is the poor controllability of the technological process of obtaining ROS.

There is a known method of production and composition of the life-support fluid for ground handling of aircraft (WO 1993024543 A2, December 9, 1993), which includes a mixture of glycol, water and a thickener, the second one uses an alkali-swellable polymer thickener in the following ratio of components in wt.%: Glycol, for example ethylene glycol 50-95; thickener 1-5; the rest is water.

The disadvantage of analogues is the poor controllability of the technological process of obtaining RLF due to the difficulty of maintaining the required viscosity.

The technical result of the claimed group of inventions is the creation of such a technology for the preparation of a thickener for RLF, which increases the degree of accuracy in obtaining the required RLP viscosity and the stability of the anti-icing fluid.

The result is achieved by the group of inventions by the method of stage-by-stage production of the anti-icing fluid thickener composition and the thickener composition, comprising loading at the first stage of propylene glycol 7.6-11.04 parts by weight, water 84.6-89.25 parts by weight and antifoam 0.05-0.1 parts by weight, mixing them in a rotary mixer with a frequency of 50-60 Hz for 10-15 minutes after loading the components, after which at the second stage mix the mixture at a frequency of 40-60 Hz and circulation at a frequency of 30-40 Hz, and then through the feed hopper, a polymer of 1.4-2.1 parts by weight is added to the suction line of the circulation system. and carry out the circulation at 10-16 Hz, the time of the second stage being about 50-65 minutes, after which the third stage is held without stirring and circulation for 4-7 hours, the fourth stage mixes the mixture at 40-60 Hz with circulation at 30-50 Hz for 5-15 minutes after loading the surfactant 0.1-0.2 wt.h., propylene glycol 0.32-0.46 wt.h., corrosion inhibitor 1.2-1.5 wt. hours, then carry out stabilization without stirring and circulation for 10-15 hours with an error in loading the amount of propylene glycol and water ± 0.1% and the remaining components ± 2%.

The result is achieved by the composition of the thickener for the anti-icing fluid obtained by the method according to claim 1, characterized in that it has the following composition, parts by weight

Propylene glycol 8.0-11.5 Water 89.25-84.6 Sodium Polyacrylate Polymer 1.4-2.1 Oxyethylated surfactant nonylphenol or ethoxylated octylphenol 0.1-0.2 Antifoam agent polydimethylsiloxane 0.05-0.1 Corrosion Inhibitor 2-Butine 1,4-diol (50% aqueous solution) 1.2-1.5

Example for 7000 kg.

Stage 1 - loading propylene glycol - 537.6 kg, water - 6247.50 kg, antifoam - 3.5 kg.

Equipment Mode:

mixing - 50 Hz, time 10 minutes.

2 stage

Component loading - polymer 98.0 kg

carried out through the feed hopper into the suction line of the circulation system.

Equipment operation mode:

a) mixing: 40 Hz

b) circulation: 30 Hz

c) circulation of 10 Hz (after component loading).

Stage duration: 50 minutes after loading the components.

Stage 3 - exposure.

a) agitator rotor: off

b) circulation: disabled.

Stage duration: 5 hours.

4th stage

Equipment operation mode:

a) mixing: mixer rotor - 60 Hz

b) the mixer rotor is 50 Hz.

Stage duration: 15 minutes after component loading: surfactant 7.00 kg, propylene glycol 22.4 kg, corrosion inhibitor 84.0 kg.

Stage 5 - STABILIZATION

a) agitator rotor: off

b) circulation: disabled.

Stage duration: 15 hours.

QUALITY ANALYSIS is shown in Table 1.

Sample volume: 1 liter.

Table 1 The indicator at 20 ° C: norm PH value 6.0-8.0 Density 0.96-1.02 Dynamic viscosity 20000-65000 Appearance Colorless thick liquid without mechanical impurities

Component loading is shown in Table 2.

table 2 No.
pp Component Component loading volume based on production of 7000 kg Mass hours Weight, kg one Propylene glycol 8.0 560.00 2 Water 89.25 6247.5 3 Polymer 1.4 98.0 four Surfactant 0.1 7.0 5 Antifoam agent 0.05 3,5 6 Corrosion inhibitor 1,2 84.00 TOTAL: 100.0 7000.00

10,000 kg example.

Stage 1 - loading propylene glycol - 1104.0 kg, water - 8460.00 kg, antifoam - 10.0 kg.

Equipment Mode:

Mixing - 60 Hz, time minutes.

2 stage

Component loading - polymer 210.0 kg

carried out through the feed hopper into the suction line of the circulation system.

Equipment operation mode:

a) mixing: 60 Hz

b) circulation: 38 Hz

c) circulation of 14 Hz (after component loading).

Stage duration: 65 minutes after loading the components.

Stage 3 - exposure.

a) agitator rotor: off

b) circulation: disabled.

Stage duration: 7 hours.

4th stage

Equipment operation mode:

a) mixing: 60 Hz mixer rotor

b) mixer rotor - 42 Hz

Stage duration: 15 minutes after loading the components: surfactant 20.0 kg, propylene glycol 46.0 kg, corrosion inhibitor 150.0 kg.

Stage 5 - STABILIZATION.

a) agitator rotor: off

b) circulation: disabled.

Stage duration: 14 hours.

QUALITY ANALYSIS is shown in Table 3. Sample volume: 1 liter.

Table 3 The indicator at 20 ° C: norm PH value 6.0-8.0 Density 0.98-1.04 Dynamic viscosity 40000-100000 Appearance Colorless thick liquid without mechanical impurities

Component loading is shown in Table 4.

Table 4 No.
pp Component Component loading volume based on 10,000 kg production Mass hours Weight, kg one Propylene glycol 11.50 1,150.00 2 Water 84.6 8460.0 3 Polymer 2.1 210.00 four Surfactant 0.2 20.00 5 Antifoam agent 0.1 10.0 6 Corrosion inhibitor 1,50 150.0 TOTAL: 100.0 10,000.00

Specific chemicals of the formula are shown in Table 5.

Table 5 Technical name Chemical name Brand name Russian analogue Propylene glycol Propane-1,2-diol Propylene glycol Propylene glycol Antifoam agent Polydimethylsiloxane Fumexol 100 Penta 465 Polymer Sodium Polyacrylate Pemulen 1621 Ots. Surface-active substance ethoxylated nonylphenol or ethoxylated octylphenol Neonol AF-9-12 Neonol AF-14 Neonol AF-9-12 Neonol AF-14 Corrosion inhibitor 2-butyn 1,4-diol (50% aqueous solution) Korantin BH (Korantin BH solid) Ots.

As follows from the above, the claimed invention allows to obtain a technology for producing a thickener for ROS, which increases the degree of accuracy of obtaining the necessary viscosity ROS and stability of the anti-icing fluid.

Claims (2)

1. The method of stage-by-stage production of a composition of a thickener of anti-icing liquid, comprising loading at the first stage of propylene glycol 7.6-11.04 parts by weight, water 84.6-89.25 parts by weight and antifoam 0.05-0.1 parts by weight, mixing them in a rotary mixer with a frequency of 50-60 Hz for 10-15 minutes after loading the components, after which at the second stage mix the mixture at a frequency of 40-60 Hz and circulation at a frequency of 30-40 Hz, and then through the feed hopper, a polymer of 1.4-2.1 parts by weight is added to the suction line of the circulation system. and carry out the circulation at 10-16 Hz, the time of the second stage being about 50-65 minutes, after which the third stage is held without stirring and circulation for 4-7 hours, the fourth stage mixes the mixture at 40-60 Hz with circulation at 30-50 Hz for 5-15 minutes after loading the surfactant 0.1-0.2 wt.h., propylene glycol 0.32-0.46 wt.h., corrosion inhibitor 1.2-1.5 wt. hours, then carry out stabilization without stirring and circulation for 10-15 hours with an error in loading the amount of propylene glycol and water ± 0.1% and other components + 2%. 2. The thickener composition for anti-icing fluid obtained by the method according to claim 1, characterized in that it has the following composition, parts by weight
Propylene glycol 8.0-11.5 Water 84.6-89.25 Sodium Polyacrylate Polymer 1.4-2.1 Oxyethylated surfactant nonylphenol or ethoxylated octylphenol 0.1-0.2 Antifoam agent polydimethylsiloxane 0.05-0.1 Corrosion Inhibitor 2-Butine 1,4-diol (50% aqueous solution) 1.2-1.5