CS223328B1 - Method of preparation of the anticorrosion active substances - Google Patents

Abstract

It is an object of the invention to provide a method of preparation anticorrosive active substances calcium fatty acid and imidazoline salts derivatives. This goal was achieved by making solutions calcium soaps are prepared directly in alcohols, from the respective acids and hydrate or calcium oxide in the presence of water, necessary to initiate the reaction. This water together with the reaction water removed by distillation.

Description

It is an object of the present invention to provide a process for preparing anticorrosive agents based on calcium salts of fatty acids and imidazoline derivatives.

This object is achieved by preparing calcium soap solutions directly in alcohols, from the appropriate acids and hydrate or calcium oxide in the presence of water necessary to initiate the reaction. This water, along with the water formed in the reaction, is removed by distillation.

The invention relates to a process for the preparation of anticorrosive active substances, which occupy an important place in the chemical industry, since the damage caused by the corrosion of ferrous and non-ferrous materials represent high annual items in the national economy; In addition to paints with permanent corrosion protection, temporary anticorrosive agents are also prepared which, after evaporation of the solvents, form a film of sufficient strength and elasticity to protect the treated surfaces for a certain period of time. Their effect is due both to the blockage of air and water vapor access to the metal surface and to the presence of a suitable corrosion inhibitor which enhances the effect of the basic carriers.

Very good protective properties of salts of organic acids with metals II are known from the literature. groups of Mendeleyev system of elements. Calcium and barium salts of long-chain fatty acids as well as aromatic and aliphatic sulfoacids are recommended. The disadvantages of these additives are the high drop point and the difficult solubility in most solvents, so the preparation of their application solutions in alcohols or mineral oils is a long-term and not very safe matter.

The above-mentioned disadvantages are overcome by the process for preparing anticorrosive agents based on calcium soaps of fatty acids and imidazoline derivatives according to the invention essentially by mixing up to 45 wt. parts of fatty and oxy fatty acids prepared by oxidation of paraffins having an acid number of 80 to 120 mg. KOH / g and a saponification number of 180 to 250 mg KOH / g and contain no more than 35 percent by weight. of unoxidised paraffin at 40 to 60 ° C, mix up to 2.5 parts by weight of water and up to 6 parts by weight of the mixture. parts of isobutanol and / or butanol are neutralized at 50-100 [deg.] U slurries

3.5 to 5.5 wt. % of hydrate and / or calcium oxide in up to 12 wt. parts of isobutanol and / or butanol, and all the water present in the reaction after dilution of up to 40 wt. parts of white spirit and up to 15 wt. parts of the aromatic hydrocarbon, preferably xylene, are removed by distillation with an immiscible solvent, the anhydrous solution being obtained by subsequent distillation of up to 7 wt. parts of solvent.

The utility properties of the preparation are adjusted by adding up to 16 wt. parts of mineral oil and up to 7 wt. % parts of saturated and / or unsaturated C12 to C18 fatty acid salts and condensation products of these acids with diethylenetriamine, containing at least 50% by weight of C12-C18 fatty acid salts; 2-alkenyl-1- (2-aminoethylimidazoline) and / or 2-alkyl-1- (3-aminoethylimidazoline).

10 to 15 wt. 40% solution in white spirit. A portion of the distilled water and the recovered solvent is used in a further operation to prepare a mixture with fatty and oxy fatty acids prior to neutralization.

The advantages of the process according to the invention for preparing anticorrosive agents are that the soap solutions are prepared directly in alcohols and / or alcohols. solvent mixtures, from the respective acids and hydrate, respectively. calcium oxide in the presence of less water required to start the reaction, which is later removed with the water formed in the reaction by distillation with an excess of water-immiscible solvents. Another advantage is the possibility of re-using distilled water and solvent for further operation, so that the environmental impact is minimized.

Example 1

375 g of a mixture of fatty and oxy fatty acids are stirred at 50 ° C in g of water, g of isobutanol, and a suspension of g of calcium hydrate in g of isobutanol is metered in with stirring until the temperature of the reaction mixture reaches 90-100 ° C. After heating at this temperature for 3 hours, the mixture is diluted with;

345 g white spirit,

120 g of xylene and boil again. Upon subsequent distillation, the aqueous phase collects in the receiver, while the organic phase is returned to the reaction.

Distil until the water separates (25 to 30 g) in the receiver, and then g of the solvents are distilled off to prepare an anhydrous calcium soap solution, to which, after cooling to 80 ° C, is added

120 g of bearing oil and g of imidazoline derivative.

After homogenizing for one hour, a product with at least 47 wt. dry weight and consistency of 20 to 40, measured on a Ford No. 4 spout at 20 ° C. Possible consistency adjustments are made by adding 10 to 20 g of white spirit, xylene or imidazoline derivative.

Example 2

320 g of fatty and oxyfatty acids are stirred at 50 ° C in g of the regenerated water from the previous operation and g of solvents regenerated from the previous operation and a suspension of g of calcium oxide in g of isobutanol is metered under stirring so that the temperature rises to 90-100 ° C.

After boiling for 3 hours, the reaction mixture is diluted by addition

195 g white spirit and

100 g xylene. Up to 30 g of water are distilled off and finally 60 g of solvents.

To the calcium soap solution thus prepared is added after cooling to 80 ° C

300 g of a solution of asphalt in white spirit containing approx. parts of asphalt (i.e. 120 g), g of bearing oil and g of imidazoline derivative.

After one hour homogenization, a preparation with a minimum solids content of 44% by weight is obtained. with a consistency of 40 to 100 s measured on a Ford Spout Cup through nozzle # 4 at 20 ° C. Possible consistency adjustment is made by adding up to 20 g of white spirit, xylene or imidazoline derivative.

Example 3

410 g of a mixture of fatty and oxy fatty acids are stirred at 50 ° C in g of water and g of n-butanol. While stirring, a suspension of g of calcium hydrate in 110 g of butanol is added to the mixture so that the temperature of the reaction mixture rises to 90-100 ° C. After heating at this temperature for 3 hours, the reaction mixture was diluted

200 g white spirit and

126 g xylene.

After re-boiling, distilled water is collected in the receiver and the solvent is returned to the reaction mixture. Approximately g of water is distilled off, followed by g of solvents.

To the anhydrous calcium soap solution thus prepared is added after cooling to 80 ° C

126 g of bearing oil and g of imidazoline derivative.

A preparation of at least 56 wt. % dry matter with a consistency of 40 to 80 s measured on a Ford No. 4 nozzle at 20 ° C. Possible consistency adjustments are made by adding 10 to 20 g of white spirit, xylene or imidazoline derivative.

In all three examples, an imidazoline derivative prepared by the condensation of oleic acid with diethylenetriamine was used.

Claims (3)

SUBJECT Process for the preparation of anticorrosive agents based on calcium soaps of fatty acids and imidazoline derivatives, characterized in that the mixture is 25 to 45 wt. % of fatty acids and oxy fatty acids prepared by oxidation of paraffins having an acid number of 80 to 120 mg KOH / g and a saponification number of 180 to 250 mg KOH / g and containing not more than 35% by weight of unoxidised paraffin at 40 to 60 ° C in the mixture, 1 to 2.5 wt. parts of water and 3 to 6 wt. parts of isobutanol and / or butanol, neutralized at 50 to 100 ° C by suspension, 3.5 to 5.5 wt. % of hydrate and / or calcium oxide in 7 to 12 wt. parts of isobutanol and / or butanol and all water present in the reaction after dilution; 18 to 40 wt. parts of white spirit; and 9 to 15 wt. parts of the aromatic hydrocarbon, preferably xylene, are removed by distillation with an immiscible solvent, the anhydrous solution being obtained by subsequent distillation, 4 to 7 wt. parts of the solvent and the performance of the composition are adjusted by addition 2 to 16 wt. parts of mineral oil and 1 to 7 wt. % of saturated and / or unsaturated chain fatty acid salts of C12 to C18 and the condensation products of these acids with diethylenetriamine, containing at least 50 wt. 2-alkenyl-1S-aminoethyl-imidazoline and / or 2-alkyl-1S-aminoethyl-imidazoline. 2. A process for preparing anticorrosive active substances according to claim 1, characterized in that 10-15 wt. parts of asphalt in the form of about 40% solution in white spirit. 3. A process according to claim 1, wherein a portion of the distilled water and recovered solvent is used in the further preparation of the mixture with fatty acids before neutralization. surgery for oxymaste Severografla, n. P., Plant 7, Most price 2,40 K8S