What is the hydrodewaxing process

Hydrodewaxing, also known as catalytic dewaxing, is a process of catalytic cracking in the presence of hydrogen and is also part of the hydrocracking process. The process is characterised by the use of a molecular sieve catalyst of a certain pore size, into which only long chain n-alkanes or poorly branched iso-alkane molecules of a smaller diameter are allowed to enter and crack, producing a product with a lower condensation point.

If the raw material processed is gasoline, the main purpose is not to reduce the condensation but to remove the poor performance of the straight chain hydrocarbons to change its anti-blast properties. The world's research and development of pro-hydrogen coagulation process has the following three main products, namely gasoline, intermediate products (diesel and jet fuel) and lubricant fractions. The most applied is the production of low-condensate diesel hydrogen condensation, processing middle distillate raw materials, raw materials dry point up to 450 ℃, the main purpose of reducing the freezing point and freezing point, so that it meets the low-temperature performance, and the freezing point can be reduced by up to 40-60°C. The dry point of the raw material can be up to 550°C when reducing the condensation of lubricating oil fractions, and the effect of reducing condensation can be more than 60°C. The main purpose of processing gasoline fractions is to increase the octane number, the RON can be increased by more than 10 units. Regardless of the fraction's hydrodewaxing process, the catalyst used is a molecular sieve of a certain pore size, and the operating pressure generally increases with the weight of the raw material.