 Here is an example of how we can use the ternary diagram to determine the blend compositions from the crude oils individual crude oils on the ternary diagram You see two regions shaded the gray shaded region is the aromatic intermediate region marked by a dash I and The green shaded region the right-hand side corner is an aftening region So let's start with placing our individual crude oils a and b on this ternary diagram For a we have 10% naftines So we should first find the 10% nafty in line on this diagram It is against the corner of naftonic cruise 100% nafty corner and Parallel to the line that joins aromatic and paraffinic corners. That is the the first major Tick on this group of lines. So that is the 10% nafty in line Now the crude a also has 60% Aromatics so we can now find that line on the diagram Starting from the top corner aromatic corner, which is 100% Coming down to find the 60% line an intersection of that line 60% aromatic with 10% naftonic will identify or will determine locate crude a on the ternary diagram You can see that the crude a falls in the aromatic intermediate crude region So it's an aromatic intermediate crude now. Let's place crude b on this on this diagram crude b has 10% aromatics and 60% naftines Let's first find the 10% aromatics line Right across from the aromatics corner the line that is parallel to the line Combining paraffinic and naftonic corners as the major Tick line 10% from the at the bottom of the diagram So on this line all Points will have 10% Aromatics in essence Now let's find the other line so we can place crude b on this 10% aromatic line Naftines are 60% So if you locate the 60% naftines line The intersection of these two lines 10% aromatics and 60% naftines Will place b in the naftonic region So crude b is a naftonic crude All the mixtures or blends we can make from crude a and crude b Will fall on a straight line that combines or connects point a with point b So you can see there is an intermediate region here Between aromatic intermediate and naftonic crudes that is paraffinic naftonic Pn P-n So you can see there are three possibilities for the final blend C It could be aromatic intermediate paraffinic naftonic or naftonic crude Depending on the ratio of a to b So the given ratio is of a to b is 2 over 3 When we place that ratio on on the line on the blue line in this plot You can see that point C the blend falls on the boundary between paraffinic naftonic and naftonic region right on that green line So the blend C could be Between paraffinic naftonic and naftonic classifications. This is a borderline case So if you would like to make a paraffinic naftonic crude from these two crudes a and b Then you need to increase the concentration of a in the blend But if you would like to end up with an aftonic crude in the blend then you need to increase the concentration of b so you can essentially traverse this line between a and b by Changing the ratios of these two crudes in the final mix