CFPP Improver, whose full Chinese name is Diesel cold filter point improver, is a chemical additive specifically designed to enhance the performance of diesel at low temperatures. Its core function is to lower the "cold filter point" of diesel, thereby preventing diesel engines from failing to operate normally due to clogged fuel filters in cold weather.

Core concept: What is a "cold filter point"?
To understand CFPP Improver, it is first necessary to understand the key indicator of cold filter point.

Cold filter point: It refers to the highest temperature at which a diesel sample initially fails to pass through a standard metal filter screen under specified experimental conditions. This temperature simulates the lowest ambient temperature at which diesel can smoothly pass through the filter in the engine's fuel supply system.

Why is it so important? When the temperature drops, paraffin (normal alkanes) in diesel will precipitate and form wax crystals. These wax crystals will rapidly accumulate and grow, eventually clogging the fuel filter, causing the engine to lose fuel supply and stall. The cold filter point is the key practical indicator that truly determines whether diesel can be used at low temperatures.

Two other temperature points related to it are:

Cloud point: The temperature at which diesel begins to form wax crystals and becomes cloudy.

Freezing point: The temperature at which diesel completely loses its fluidity and cannot be poured.

The key difference is that the freezing point is more of a theoretical value, while the cold filter point is closer to the actual working conditions of the engine. Even if the diesel has not completely solidified (the freezing point has not reached), as long as the filter is clogged with wax crystals, the engine cannot run. Therefore, lowering the cold filter point is of more practical significance than lowering the freezing point.

2. Functions and Benefits
The use of CFPP Improver can bring the following main benefits:

Preventing filter clogging: Ensuring that diesel can pass through the fuel filtration system smoothly even at lower temperatures is its most crucial function.

Ensure the normal operation of the engine in cold weather: Avoid difficulties in starting the engine, power reduction or stalling during operation caused by poor fuel supply.

Expand the applicable temperature range of diesel: Enable the same grade of diesel (such as No. 0 diesel) to be used for short-term or emergency purposes in colder environments.

Enhancing the reliability of the fuel system: This is of vital importance for vehicles and equipment operating in extremely cold regions.

3. Working principle
CFPP Improver does not prevent the precipitation of paraffin but works by altering the morphology and growth pattern of wax crystals:

Adsorption and eutectic: During the initial stage of wax crystal formation, additive molecules will adsorb onto the surface of the wax crystal or co-crystallize with it.

Altering crystal morphology: It inhibits the wax crystals from growing into large plate-like or needle-like structures, and instead promotes the formation of more, smaller, and more smooth-surfacing microcrystals.

Prevent the formation of a three-dimensional network: These tiny and dispersed microcrystals cannot effectively connect with each other, forming a strong three-dimensional network structure that can clog the filter screen.

Maintain filterability: Therefore, even if wax crystals have precipitated, due to their fine and dispersed nature, they can smoothly pass through the mesh of the filter, thus ensuring the continuous flow of fuel.

A simple metaphor: Just like snowfall, without an improver, what falls are large "snowflakes" (big wax crystals), which are prone to accumulate and clog. After using the improver, what comes down is fine and round "snow sand" (small wax crystals), which are loose and not easy to accumulate, and are easier to be "swept away" (through the filter screen).

4. Main chemical components
Common CFPP improvers are usually high-molecular polymers, mainly including:

Ethylene-vinyl acetate copolymer

Polymethacrylate

Polyα -olefins, etc.

5. Application scenarios
Refineries and blending companies: Add during the production process to produce low pour point diesel that meets specific seasonal and regional standards (such as -10 #, -20 # diesel).

Gas stations and storage and transportation providers: During seasonal changes, it is added to storage tanks to improve the low-temperature performance of existing diesel.

End users: Truck fleets, construction machinery operators, shipowners or individual vehicle owners purchase and add fuel tanks on their own before winter arrives or when traveling to cold regions as a preventive measure. The best time to add is before the temperature drops and wax crystals precipitate, and make sure to mix thoroughly.