Asphalt Stabilization Process (Patent No: 597962)

Inventor: Gower, Charles B.

Location: Medicine Hat

Comments: N/A

Description: The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A process for producing ashpalts which remain stable under normal climatic temperature variations, which comprises heating asphalt or asphalt base crudes containing olefines, in the presence of a catalyst selected from the group consisting of manganese, iron, cobalt and nickel, and an unsaturated glyceride t1rough a temperature range of from 300 to 350 degrees F. with continuous agitation.
2. The process defined in claim 1 wherein the unsaturated glyceride is linseed oil.
CLAIMS SUPPORTED BY THE SUPPLENTARY.DISCLOSURE

3. A process for the production of asphalts which remain stable under normal climatic temperature changes, which comprises heating asphalts or asphalt base crudes, containing olefines, in the presence of a catalyst selected from the group consisting of a metal and a metal organic salt, said metal belonging to Group VII or VIII of the Periodic Table, and a compound selected from the group consisting of an unsaturated glyceride and a fatty acid, to effect combination between the fatty acid component and the asphalt or asphalt base crude by esterification with the defines therein.

4. The process defined in claim 3, wherein the resultant mixture is further subjected to blowing with gas containing oxygen in order to facilitate solution of the esters in the asphalt mixture.

5. A process for the production of asphalts which remain stable under normal climatic temperature changes, which comprises heating asphalts or asphalt base crudes, containing olefines, in the presence of a catalyst composed of a metal organic salt, said metal belonging to group VII or VIII of the Periodic table, and an unsaturated glyceride, to effect combination between the fatty acid components of the said glyceride and asphalt or asphalt base crude by esterification with the olefines therein.

6. A process for the production of asphalts which remain stable under normal climatic temperature changes, which comprises heating asphalt or asphalt base crudes containing olefines, in the presence of cobalt or manganese and a fatty acid, to effect combination between the fatty acid and the asphalt or asphalt base crude by esterification with the olefines therein, followed by blowing with gas containing oxygen to facilitate solution thereof in the asphalt mixture