Non-hydrogen dewaxing Unit

Non-hydrogen catalytic production of wax oil with low freezing point base oil and gasoline and diesel equipment

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Our services: Our professional team will provide you with a full-process solution for the production of low-freezing point base oil and gasoline and diesel equipment with 1 to 1 million tons of wax oil non-hydrocatalytic production. Turnkey project from design to installation to commissioning

Most of the crude oil in my country is paraffin-based, and the hydrocarbon content of paraffin in petroleum products is relatively high, especially in petroleum products with heavier fractions, often due to the high wax content and high freezing point, which affects the use of the product.
Since the beginning of 1980, the Academy of Petrochemical Sciences has started the research on the non-hydrogen pour point depressing process. It uses catalytic diesel as the main raw material and has achieved good results. It is a newly developed process technology. The process can selectively crack the wax component in the heavy diesel oil under the condition of normal pressure and without hydrogen to reduce the freezing point, so it has the characteristics of simple process flow, low investment and high benefit.
The characteristics of non-hydrogen depressurization process: The practice of non-hydrogen depressurization in the past few years has shown that it has many characteristics and advantages and is welcomed by users.
1. The non-hydrogen condensation reduction process is simple, easy to operate, and the construction investment is low.The non-hydrogen condensation reduction (including the gas-associated process) is heated to a certain temperature by the heating furnace and enters (or is accompanied by liquefied gas) fixed bed reactor (one or Two), the reaction product directly enters the fractionation tower to obtain gasoline and diesel components. The gas is compressed to produce part of liquefied gas and fuel gas. The reaction pressure is normal pressure, and there are no special requirements for the equipment.
2. Non-hydrogen pour point depressing has ideal product distribution and good product properties. The yield of light oil for industrial non-hydrogen pour point depressor is 77%, and the yield of light oil with gas pour point depressor is about 95%. Moreover, the diesel-to-steam ratio is high, generally 1.9-2.3, which is much higher than the diesel-to-steam ratio of catalytic cracking (about 0.5). In particular, it should be pointed out that the amount of coke is extremely low, only a few parts per 100,000, which can be ignored. Therefore, more than 98% of the products obtained by condensation reduction can be used as commodities. The octane number of non-hydrogen pour point depressing gasoline (MON, the same below) is 79-80, and some of the associated gas depressing pour point gasoline is as high as 82, which is a valuable high-octane component. That is, it has a higher blending octane number. Pour point depressant diesel also has a higher cetane number, 10-20 units higher than catalytic diesel, and is a better diesel blending component. There is very little dry gas in the gas, mainly C3 C4 components, accounting for more than 97%; and C3 C4 is mainly composed of olefins, accounting for about 60%-70% of the gas, which can be used as petrochemical raw materials.
3. Non-native nitrogen condensation reduction has higher economic benefits. The pour point depressant has satisfactory product distribution and excellent product properties, and the pour point depressant raw material is a low-value heavy diesel component, which will naturally have better economic benefits. Application prospects of non-hydrogen condensation depressing process. Most crude oils in my country have high wax content, and the pour point reduction process has a wide range of application prospects. The following feasible application schemes are now proposed. 1. Combination of pour point depressing and catalytic cracking. 1) Catalytic cracking and non-hydrogen pour point depressing do not compete with each other for raw materials, they can complement each other, and each has its place. Pour point reduction is suitable for the treatment of lighter gas oil, such as normal third line, reduced first line, and catalytically cracked heavy diesel oil. These raw materials are more difficult to crack in a catalytic cracking unit; catalytic cracking can process heavier vacuum gas oil. In this way, catalytic cracking can reduce the cycle ratio. Expand processing capacity. 2) FCC products contain more gasoline and less diesel; while there are more diesel fuel and less gasoline in pour point depressant products. The combination of the two devices can adjust the diesel/steam ratio within a certain range. 3) Due to the similar nature of the products of the two processes, a combined device can be formed to share the absorption stabilization system and the gas compression system. If the pour point depressant material is the third line of normal and the first line of oil is reduced, the fractionation system can also be shared, that is, the pour point depressant product is directly introduced into the catalyst Separation system for cracking. This will further simplify the device composition, save investment, and reduce energy consumption.

 

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