CS216449B1 - A method for producing an additive from waste acid pitch into construction materials - Google Patents

Abstract

Method for producing additive material from waste acid resins, for construction materials. The practical and economical utilization of . unpleasant waste (acid resins) for additive material, which can be used to improve the properties of asphalts and asphalt mixtures; as an anti-corrosion, plasticizing and air-entraining additive for concrete mixtures. The essence of the invention — polymerized and co-condensed acid resins are either ground to the desired grain size or emulsified in water — additives causing acceleration of solidification, hydrophobicity and other substances in which the additive material was used can be added to the additive material. , The invention can be used: — in improving the properties of asphalts and asphalt mixtures — in the production of concrete mixtures.

Description

The invention relates to a process for the production of an additive material from waste acid pitch, in the form of a powder or an aqueous paste dispersion, as an additive to various construction materials.

At present, acid pitches, waste in acid refining of mineral oils, are not used economically in our country and are mostly exported to waste dumps, where they cause contamination of both air and subsoil and underwater. The present invention solves this problem.

The subject of the invention is a process for the production of an additive mass from waste acid pitches, by their processing - by concentration at elevated temperature (complex oxidation-reduction, polymerization and polycondensation reactions take place) and their dispersion in heat in water or after cooling by grinding to the desired grain. The admixture can be treated with admixtures causing curing, solidification acceleration, hydrophobization and the like. the substances in which the additive mass has been used.

The advantage of the production of the additive mass is that the additive mass can be used for various purposes and that very unpleasant waste substances occurring in our country in considerable quantities can be utilized in its production.

The present process for the production of an additive material from acid pitch seems to be an advanced solution also in view of the problems associated with the storage and disposal of this unpleasant waste.

Example 1

Waste acidic pitches are heated at

SUBJECT

Process for producing an additive material from waste acid pitches into construction materials, characterized in that the acid pitches are heated at a temperature of 100 to 400 ° C at atmospheric pressure, then dispersed in water, a) or after cooling to the desired grain size '.

2. A method of producing an additive mass at a temperature of 100 to 200 ° C for as long as they can still be emulsified while hot in water or can be milled after cooling. The temperature increase is gradual and is accompanied by the escape of sulfur gases, water vapor and foaming.

The slurry consistency of hot acidic pitches is emulsified hot in water.

The hot, semi-solid and porous mass of dewatered and degassed acid pitch is ground to a powder after cooling.

2. Example

The acidic pitch additive powder is adjusted to the desired pH by washing with water or mixing with powdered lime. Washing the powder additive mass, e.g. trichlorethylene, possibly free of any free oils.

Additives may be admixed to the powder additive mass to accelerate the solidification of the concrete mixture (e.g., sodium silicate powder), or to hydrophobize the concrete mixture (e.g., emulsion oil) and others.

The additive mass may be used, e.g. as aerating, plasticizing and corrosion-proofing agent for concrete mixtures, as an admixture for asphalts and asphalt mixtures to improve their properties and others.

Waste sulfur gases escaping in the production of the additive mass, e.g. for the production of fertilizers or for the production of sulfuric acid and the like.

Claims (3)

OBJECT A method for producing an additive composition from waste acid driers, to construction materials, characterized in that the acid pitch is heated at 100 to 400 ° C at atmospheric pressure, then dispersed in water, and) or, after cooling, ground to the desired grain size. '. 2. A method for producing an additive composition according to a temperature of 100 to 200 [deg.] C. for a time when it is still possible to emulsify it in hot water or when it can be milled after cooling. The temperature increase is gradual and is accompanied by the escape of sulfur gases, water vapor and foaming. The slurry consistency of the hot acidic mixtures is hot emulsified in water. The hot semi-solid and porous mass of dewatered and degassed acid mixtures is ground to a powder upon cooling. Example 2 Powdered additive material from acidic mixtures is adjusted to the desired pH by washing with water or by mixing with lime powder. By washing the powder additive, e.g., trichlorethylene, any free oils can be removed. Additives to accelerate the solidification of concrete mixtures (e.g., sodium silicate powder) or to hydrophobize concrete mixtures (e.g., emulsion oil) and others can be admixed to the powder additive. The additive can be used, for example as an aeration, plasticizing and anticorrosive additive in concrete mixtures, as an additive to asphalt and asphalt mixtures to improve their properties and others. Sulfur gases escaping in the production of the additive mass, eg for the production of fertilizers or for the production of sulfuric acid and the like, can also be evaluated. DISCLOSURE OF THE INVENTION, characterized in that the additive composition is adjusted to the desired pH and de-oiled. 3. A method for producing an additive composition according to claim 1, wherein accelerators, hardeners, hydrophobizing agents and the like are added to the milled additive composition. 216449