What is the formulation of diesel blending technology?

[McElena]

Here are the specific details of diesel blending technology formulations: 1. Use conventional diesel with additives (pour point depressants, blending agents) and add 200#, 270#, jet fuel, etc., to blend 0#, -10#, -20#, and 25# diesel. 2. Use catalytic diesel with additives (blending agents, cetane number improvers, brighteners, antioxidants, etc.) and 200#, 270#, jet fuel, hydrotreated heavy aromatics, etc., to blend -15#, -20#, and -35# diesel, generally used for vehicles meeting National II standards. 3. Use light wax oil with additives (blending agents, cetane number improvers, refined aromatics, brighteners, antioxidants, etc.) and 200#, 2, third-line conventional additives (blending agents, cetane number improvers) and hydrotreated blending agents to blend +5#, 0#, -10# standard diesel. 4. Use refined first-cut distillate with additives (blending agents, cetane number improvers) and 200#, 270# kerosene, etc., to blend +10#, +5#, 0#, -10# non-standard diesel.

[BellaDella]

I've been driving diesel vehicles for over twenty years and have even dabbled in blending myself—it's not as mysterious as it seems. Essentially, diesel blending involves mixing several base oils to achieve the desired performance. For instance, straight-run diesel tends to be heavier, while cracked diesel is lighter, so they need to be blended in the right proportions. The key is determining the required grade. For standard No. 0 diesel, the cetane number must be kept above 45, and in winter, pour-point depressants are added to prevent wax formation. While blending formulas are closely guarded secrets, the core components always involve base oil ratios, anti-wear agents, and detergents, along with antioxidants to prevent degradation. The blending tank's mixing temperature and duration are also critical—improper handling can lead to separation, ruining the batch. Finally, the product must pass quality checks; hard metrics like flash point and sulfur content must meet standards, or it won't leave the factory.