aAkzo Nobel Asphalt Applications

bTexaco Inc. The asphaltenes obtained from the deasphalting process are difficult to handle and pump because of their high viscosities and softening points (Ring & ball), which range from 80 to 300 oC. The asphaltenes have a fuel value better than that of coal and petroleum coke and are in general comparable in cost to that of coal. An economical process for converting asphaltenes to an easy to handle material by emulsifying with water is a desired option. Emulsification of asphaltenes and similar hard hydrocarbons with a softening point ranging from 80 C to 120 C will be discussed. Emulsification at a mix temperature as high as 165 C is possible. The dispersions of asphaltenes and other hard hydrocarbons in water produced by this process are more stable than normal paving grade asphalt emulsions. There are some limitations concerning the types of surfactants that can be used at these higher than normal emulsification or mix temperatures