CN102093851A - Anti-freezing solution for water tanks of automobiles and preparation method thereof - Google Patents

Abstract

The invention discloses an anti-freezing solution for water tanks of imported and domestic middle-grade automobiles and various other automobiles, and a preparation method thereof. The anti-freezing solution comprises the following components in part by weight: 45 to 55 parts of ethylene glycol, 0.8 to 1.5 parts of borax, 0.25 to 0.4 part of benzotriazole, 0.9 to 1.3 parts of sodium nitrite, 0.4 to 0.6 part of sodium metasilicate pentahydrate, 0.4 to 0.6 part of disodium hydrogen phosphate and 45 to 55 parts of water. In the preparation method, the components are added sequentially, and fully and uniformly mixed at the normal temperature under the normal pressure at the stirring rotation speed of between 50 and 80 revolutions per minute. The anti-freezing solution is suitable for anti-freezing of water tanks of automobiles in northeast China, northwest China and other places which are cold in winter, is nontoxic, tasteless and environmentally-friendly, has high boiling resistance, freezing resistance, corrosion resistance, rust resistance and scale resistance, and does not influence a rubber organic coating.

Description

Radiator deicing fluid and compound method

Technical field

The present invention relates to a kind of antifreeze chemical composition solution that is used for,, and relate to its compound method especially for the deicing fluid of radiator.

Background technology

The northern area of China winter severe cold, the Automobile parking time is long, especially is easy to cause the water tank bursting by freezing as the water in the water tank not being bled off night, often adds deicing fluid to avoid accident.Existing deicing fluid is because of the imperfection of its component, proportioning and making method, unreasonable, and antifreezing effect is bad, and the time one is long, also can make the water tank burn into produce rust deposite, does not reach service requirements.

Summary of the invention

The technical problem to be solved in the present invention is the weak point that overcomes existing deicing fluid, and a kind of good freezing protection effect is provided, and can not make water tank produce the radiator deicing fluid of burn into rust deposite, and the compound method of standard is provided.

The component of radiator deicing fluid of the present invention and weight proportion are: ethylene glycol 45～55, borax 0.8～1.5, benzotriazole 0.25～0.4, Sodium Nitrite 0.9～1.3, metasilicate pentahydrate sodium 0.4～0.6, Sodium phosphate dibasic 0.4～0.6, water 45～55.

The preferred weight proportioning of said components is: ethylene glycol 50～52, borax 1～1.2, benzotriazole 0.3～0.32, Sodium Nitrite 1.1～1.2, metasilicate pentahydrate sodium 0.5～0.55, Sodium phosphate dibasic 0.5～0.55, water 50～52.

Deicing fluid compound method of the present invention is to get the raw materials ready by the weight ratio of each component, operates as follows then:

(1) benzotriazole under agitation is dissolved in the ethylene glycol, gets solution A;

(2) respectively borax, Sodium Nitrite, Sodium phosphate dibasic and metasilicate pentahydrate sodium are added in the entry, fully stirring and dissolving gets solution B after the filtration;

(3) under agitation solution A is added in the solution B, make solution C;

(4) with the sodium hydroxide solution of weight percent concentration 20% solution C is adjusted pH value, make it reach PH=8.5～9.0, obtain radiator deicing fluid.

Above mixing speed is 50～80r/min.

The present invention through repetition test, screening after, adopt scientific and reasonable raw material and proportioning, and through the operating procedure of standard, the deicing fluid of making has good antifreezing effect, according to the amount ratio (weight) of deicing fluid and water, the freezing temperature that draws is as follows:

Deicing fluid % water % freezing point ℃

100 0 -40

90 10 -35

80 20 -28

70 30 -23

60 40 -18

50 50 -14

Nontoxic, the non-corrosiveness of the contained material of this deicing fluid, and adjust pH value in the process for preparation, form suitable alkalescence, therefore, life-time service can not produce burn into corrosion and fouling to water tank, satisfies service requirements fully.

Embodiment

Further specify the present invention below by embodiment.

Example one: 1, benzotriazole 0.3kg under agitation is dissolved in the 50kg ethanol, solution A;

2, respectively borax 1kg, Sodium Nitrite 1.1kg, SODIUM PHOSPHATE, MONOBASIC 0.5kg and metasilicate pentahydrate sodium 0.5kg are under agitation added in the 50kg water, fully stirring and dissolving is filtered with 80 or 100 sieves, gets solution B;

3, under agitation solution A is added in the solution B, make solution C;

4, with the sodium hydroxide solution of weight percent concentration 20% solution C is adjusted pH value, make PH between 8.5～9.0, promptly get radiator deicing fluid.

Above mixing speed is 60r/min.

Example 2 each amounts of components and mixing speed to the example 4 is as follows, and working method is with example one:

	Benzotriazole kg	Ethylene glycol kg	Borax kg	Sodium Nitrite kg	SODIUM PHOSPHATE, MONOBASIC kg	Metasilicate pentahydrate sodium kg	Water kg	Rotating speed r/min
									Example 2	0.25	45	0.9	1.0	0.45	0.4	45	50
Example 3	0.32	52	1.2	1.2	0.55	0.55	52	70
									Example 4	0.4	55	1.5	1.3	0.6	0.6	55	80

Claims (3)

1. radiator deicing fluid is characterized in that the component of this deicing fluid and weight proportion are:

Ethylene glycol 45～55 boraxs 0.8～1.5

Benzotriazole 0.25～0.4 Sodium Nitrite 0.9～1.3

Metasilicate pentahydrate sodium 0.4～0.6 Sodium phosphate dibasic 0.4～0.6

Water 45～55.

2. by the described radiator deicing fluid of claim 1, it is characterized in that: the weight proportion of described each component is:

Ethylene glycol 50～52 boraxs 1～1.2

Benzotriazole 0.3～0.32 Sodium Nitrite 1.1～1.2

Metasilicate pentahydrate sodium 0.5～0.55 Sodium phosphate dibasic 0.5～0.55

Water 50～52.

3. a compound method that is used for by the described radiator deicing fluid of claim 1 is characterized in that getting the raw materials ready by the weight ratio of each component, operates as follows then:

(1) benzotriazole under agitation is dissolved in the ethylene glycol, gets solution A;

(2) respectively borax, Sodium Nitrite, Sodium phosphate dibasic and metasilicate pentahydrate sodium are added in the entry, fully stirring and dissolving gets solution B after the filtration;

(3) under agitation solution A is added in the solution B, make solution C;

(4) with the sodium hydroxide solution of weight percent concentration 20% solution C is adjusted pH value, make it reach PH=8.5～9.0, obtain radiator deicing fluid.

Above mixing speed is 50～80r/min.