DE526783C - Process for refining bituminous substances by adding resins - Google Patents

Description

Process for refining bituminous substances by adding resins The present invention relates to a method for upgrading bituminous substances by adding resins.

It is known that tar from a solution of pitch, mostly in Anthracene oil. Such a tar is probably used for road construction, points but not the same good properties like Spramex, Mexphalt, Ebanoasphalt etc. (the as is well known from artificial petroleum splinters by adding more asphalt oils or a less chewy consistency).

It has now been found that it is possible to give the tar physical properties which are similar to those of natural asphalts if it is melted together with stable resins, in particular phenol condensation products, or these resins are made from the phenols in the tar by adding formaldehyde or other aldehydes generated in the mass itself. So far it was not known that phenol-formaldehyde resins dissolve in tar and form a homogeneous substance with the bituminous substances, the strength and toughness of which is similar to that of known petroleum sphalt. As is known, when phenol is heated with aldehydes with the addition of a condensing agent, e.g. B. hydrochloric acid, phenolic condensation resins. They will first form in the viscous A-shape. The phenol condensation resins can be converted into the solid B form by further heating, but still soluble in alcohol and acetone. The B form then changes into the insoluble C form through prolonged oxidation, polymerization or, in particular, the action of pressure. For the purposes of this invention, the substances are only converted to the A or B form and dispersed in the tar. In addition, various natural resins, such as acroid, copal and damar resins, can also be dispersed in the tar at elevated temperature, if appropriate under the action of elevated pressure. An addition of 5010 synthetic resin is sufficient to enable the absorption of larger amounts of pitch, etc.

The tar-synthetic resin mixtures can also be used as macadam and im Use a mixture with sand as rolled asphalt.

The advantage of using phenolic condensation resins in A- or B-form compared to natural resins consists in the fact that the tar - a substance - is added, which firstly increases the resistance and secondly in dispersion form and swollen State has the ability to bind the anthracene oils strongly, so that the evaporation these oils is made considerably more difficult. This is a very important factor for tar roads, because the elasticity of the tar layer is increased, while with ordinary tar mixtures oils that can evaporate, such as B. anthracene oil and the like., Volatilize and the pitch residue as a brittle substance becomes worthless as a binder for road surfaces. Also supports the colloidal dispersion state of the phenolic condensation resins the Distribution of the tar pitch in the tar oil and at the same time increases the viscosity of the Bad luck. When the phenol in the tar directly with formaldehyde or other Aldehydes are reacted, phenolic tars can be condensed, where the unsaturated hydrocarbons in the tar oil also condense = be sated. The easily evaporable oils are converted into higher-boiling substances transferred, which gives the tar an increased consistency and elasticity.

The following examples illustrate the process in more detail. EXAMPLE 100 parts of coal tar are melted together with parts of cheap phenol condensation resins of the A or B form (but preferably in the B = state). At first the mass foams very strongly; As the temperature increases to 10 ° C, the melt calms down and the phenol condensation resin is completely dispersed in the tar, which not only increases the consistency, but also increases the elasticity of the tar and the capacity of the additional pitches, etc. "Additions of further quantities of hard- or soft pitch as a hardening agent of the refined tar are permissible. By choosing the right additives to the above tar, different consistencies of the tar can be achieved - up to a firmness similar to sparse increase of bituminous materials, are allowed, but these additives may only after dissolution of the synthetic resins are added. example A A paraffin free tar, contained in the phenol, is calculated by adding 3-1 5 parts of formaldehyde, to i oo parts tar ( depending on the phenol content), and some hydrochloric acid or some other known other condensation medium heated until the reaction has occurred and the phenol condensation products have formed in the tar. The excess water is then removed by evaporation and heated with further stirring up to 150 to 150 ° C (preferably in a vacuum). Instead of formaldehyde, you can also use another aldehyde, e.g. B. furfural, paraldehyde, etc. These resin compounds formed by condensation also give a good. refined tar, to which the additives mentioned in example i can be added as thickeners of the desired consistency and melting point.

Using the method described, it is possible to use phenol-containing tars to make it usable for road construction purposes, which has not yet been achieved. In In the same way, so-called primal tars can also be processed, if suitable Amounts of aldehydes and condensing agents are added.

The tar and synthetic resin mixtures specified above can also be used in converted into emulsions in a known way and then after the cold process in road construction be used.

Claims (2)

PATENT CLAIMS: i. Process for refining bituminous substances by adding resins, characterized in that tar is melted with 1 to 50% phenol condensation resins in the A or B state, optionally under pressure and with the addition of pitch. 2. The method according to claim i, characterized in that phenol-containing tars with an aldehyde with the addition of suitable known reactants, such as. B. hydrochloric acid; are heated together.