How are hydrocra oils produced?

The starting product is the long-chain (solid) normal kerosenes from the dewaxing of raffinates. The kerosene molecules are broken down (cracked) into shorter lubricant molecules in special cracking plants in a hydrogen atmosphere using special catalysts. As a result of the process, mainly branched hydrocarbon chains (isoparaffins) are produced. In the subsequent vacuum distillation process, the isoparaffins are separated according to viscosity and the remaining unbranched hydrocarbon chains (normal kerosenes) are...