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Diesel pour point depressant

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Diesel pour point depressant

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一、 Product introduction 

CFA diesel pour point depressant, also known as CFA diesel low temperature fluidity improver, is a commonly used additive in diesel production. It plays an obvious role in increasing diesel oil production, improving production flexibility and the ratio of wood and steam, and improving economic benefits. For the storage, transportation and users of diesel oil, the application of pour point depressant can obviously improve its low temperature performance.
Diesel oil solidifies at lower temperatures because it contains a certain amount of wax (known as n-alkanes), which gradually separates out and forms wax crystals as the temperature drops. With the further decrease of temperature, wax crystals will grow rapidly, first forming planar crystals, these crystals are connected to each other, even forming a three-dimensional network structure, the oil in which, so that the oil loses liquidity and appears to be solidified.
The addition of pour point depressant can change the crystal shape of wax or the size of wax crystal, but can not prevent the wax crystal precipitation and reduce the amount of wax precipitation. Therefore, under the action of pour point depressant, when the temperature of diesel oil is reduced, there will be more fine wax crystal particles in the diesel oil with high wax content, so that the appearance of the oil becomes cloudy, which is a normal physical phenomenon, but this does not affect the smooth diesel through the filter (or filter), and will not affect other performance indicators of diesel oil. It is worth noting that this oil should be sold in time after mixing, once the dispersed wax settlement, the cold filter point of the upper oil is very difficult to fall.
The use effect of pour point depressant depends not only on the performance of pour point depressant itself, but also on the composition of oil added. When a kind of pour point depressant is added to diesel oil with different composition, the amplitude (receptivity) of cold filter point is greatly different. Therefore, the best pour point depressant should be selected according to the receptivity of various pour point depressants to the oil. Next, want to join the composition of oil according to place and property, pass the small test of laboratory, add in order to determine optimal amount.
Generally, the dosage ranges from 0.2‰ to 1.0‰. The specific additive method is: according to the best additive proportion determined by the laboratory test, calculate the required coagulation dosage. First, these pour point depressants with the diesel oil to be added in a certain proportion into the mother liquor. Then, add the mother liquor into the diesel oil and stir it thoroughly until it is evenly mixed.

二、 technical indicators

Inspection items Quality indicators Inspection methods
appearance Light yellow liquid visual

density(20℃)/㎏.m-3

880-980

GB/T1884

kinematic viscosity(50℃)/mm2.s-1

<50

GB/T265

Flash point (closed) ℃≥

61

GB/T261

Freezing point, ℃

<10

GB/T510

 Acid value/m KOH. g-1

1.0

GB/T264

Effect test 0# diesel oil +0.8‰ of this product

Drop condensation point℃

>20

GB/T510

Cold filtration point reduction℃

>5

SH/T0248

三、 Precautions for use

 

  • As the pour point depressant has a great difference in receptivity to diesel oil, the general usage is 500-1000ppm according to different oil products. Before mass production, small samples should be taken in the laboratory for effect evaluation and analysis before mass production.
  • When using, in order to ensure the effect of use, it should be fully dissolved in the greenhouse and then mixed with diesel according to 1:1 mother liquor, and then transferred to the large tank diesel by explosion-proof metering pump or gear pump according to the proportion of small additives in circulation or online addition.
  • This product is a low molecular polymer, microtoxic. When splashing on skin or clothes, use petroleum ether or 120# solvent oil to clean.
  • This product has no impact on refinery equipment and environment, and will not have adverse reactions with other additives.

 

四、Packing specifications

The product is packed in galvanized drum, weighing 180 kg/drum. The marking, transportation and storage shall be in accordance with SH0164. During storage and transportation, mechanical impurities and water should be strictly prevented from mixing, and stored in a cool and ventilated place.

 

 

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