CN1928036A - Diesel oil pour point depressant - Google Patents

Abstract

The invention discloses a diesel pour point depressant, which is composed of 5-15% of α-olefin, 15-30% of acrylate, 20-45% of maleic anhydride, 10-25% of fatty amine, and 10-25% of aliphatic amine. Base naphthalene 20-50%. The diesel pour point depressant of the invention is mainly suitable for being added to No. 0 diesel oil to improve it into -10 No. diesel oil. It has the following excellent properties after being used in examples. (1) The storage safety performance is good, and the flash point is about 70°C, which is obviously better than similar products at home and abroad. (2) The pour point depressing effect is good.

Description

A diesel pour point depressant

technical field

The invention relates to a pour point depressant, in particular to a pour point depressant for diesel.

Background technique

In industries such as energy and transportation, diesel plays a very important role. Especially No. 0 diesel oil accounts for more than 70% of the total amount of diesel oil. A prominent problem in the use of No. 0 diesel oil is poor low temperature fluidity. Especially in the south of the Yangtze River, the use of diesel oil in winter due to the high cloud point causes insufficient fuel supply to the engine, which directly affects the normal operation of the engine. In recent years, the prices of gasoline and diesel have continued to rise. The use of -10 diesel in winter not only increases fuel costs, but also often suffers from resource constraints.

Domestic additives used to improve the low-temperature performance of diesel have been widely used in -20 and -35 diesel. But for No. 0 diesel oil, the addition effect is not ideal. It is better for naphthenic diesel oil, but worse for paraffin base. The main reason is that No. 0 diesel has a high wax content and a wide fraction.

The Exxon company of the United States first developed this diesel pour point depressant in 1985. Subsequently, the French Petroleum Research Institute, the German Clariant Company and the Japanese Sanyo Company successively developed different types of diesel fluidity improvers. So far, the combination of diesel turbidity reducer and diesel low-temperature fluidity improver and the consumption of additives in diesel have not been reported.

my country has encountered some problems when developing pour point depressants suitable for No. 0 diesel oil:

(1) The chemical composition and fraction of diesel oil are more sensitive to additive susceptibility. It is necessary to find a reasonable blending combination to achieve a satisfactory adding effect. Many foreign pour point depressants are not suitable for the sensitivity of domestic diesel oil, and cannot achieve the pour point depressant effect.

(2) According to my country's vast land and abundant resources, the chemical composition and fractions of diesel oil are different, and the adaptability to pour point depressants will be different. It is necessary to solve the problem of broad spectrum and wide application.

(3) Usually, the flash point of diesel oil pour point depressant is about 30°C, which belongs to the first-class dangerous goods. According to the actual situation that most users do not have the storage of dangerous goods.

Contents of the invention

The technical problem to be solved in the present invention is to disclose a diesel pour point depressant to overcome the above-mentioned defects and problems in the prior art.

Diesel pour point depressant of the present invention, its composition and amount percentage composition are as follows:

α-Olefin 5～15%

Acrylate 5～30%

Maleic anhydride 20～45%

Fatty amine 10～25%

Alkylated naphthalene 20～50%

More preferred are:

α-Olefin 8%

Acrylates 19%

Maleic anhydride 29%

Fatty amines 14%

Alkylated Naphthalene 30%

The α-olefins are preferably C15-C20 α-olefins;

Said fatty amine hydrocarbon is preferably C15～C20 fatty amine;

Said alkylnaphthalene is preferably C15-C20 alkylnaphthalene.

The preparation method of the diesel pour point depressant of the present invention is a conventional physical mixing method, and each raw material is stirred and mixed.

The diesel pour point depressant of the present invention is mainly suitable for being added to No. 0 diesel oil to improve it into -10 No. diesel oil. It has the following excellent properties after being used in examples.

(1) Good storage safety performance

Generally, the flash point of diesel pour point depressant is around 30°C, which belongs to the first-class dangerous goods. According to the actual situation that most enterprises do not have the storage of dangerous goods, it is determined that the flash point of the pour point depressant is not lower than 55°C. After repeated adjustments and tests, a safe pour point depressant has been developed. The flash point of the typical data is about 70°C, which is obviously better than similar products at home and abroad.

(2) Good pour point depressing effect

This product is added to No. 0 diesel oil in Zhenhai, Hejiawan, Qixiashan, and Jinweixi. After analysis and testing by a third-party testing agency, it has the effect of significantly reducing the cold filter point of diesel oil. It can be seen from the comparison of test data that the diesel oil of the present invention reduces The coagulant has a very excellent effect of reducing the cold filter point of diesel oil.

Detailed ways

In the examples, α-olefins, aliphatic amines and alkylnaphthalenes all have 18 carbon atoms.

Example 1

The amount of raw materials: 8% α-olefin, 19% acrylate, 29% maleic anhydride, 14% fatty amine, 30% alkyl naphthalene;

Stir and mix α-olefin, acrylate, maleic anhydride and fatty amine to obtain the diesel pour point depressant.

The test results are shown in Table 1.

Table 1: Analysis and detection results of diesel pour point depressant of the present invention sample name Dosage (ppm) Cold filter point (℃) Hejiawan Diesel - -3 Add diesel pour point depressant 1000 -14 Zhenhai Diesel - -2 Add diesel pour point depressant 1000 -15 Qixia Mountain Diesel - -4 Add diesel pour point depressant 1000 -8 Golden Weissy Diesel - -3 Add diesel pour point depressant 1000 -18

Example 2

α-olefin 15%, acrylate 30%, maleic anhydride 25%, aliphatic amine 10%, alkyl naphthalene 20%.

Stir and mix α-olefin, acrylate, maleic anhydride and fatty amine to obtain the diesel pour point depressant.

The test results are shown in Table 2.

                                                                              

Claims (3)

1. a diesel pour inhibitor is characterized in that, its composition and amount per-cent are composed as follows:

Alpha-olefin 5～15%

Acrylate 15～30%

Maleic anhydride 20～45%

Aliphatic amide 10～25%

Alkylnaphthalene 20～50%.

2. diesel pour inhibitor according to claim 1 is characterized in that, its composition and amount per-cent are composed as follows:

Alpha-olefin 8%

Acrylate 19%

Maleic anhydride 29%

Aliphatic amide 14%

Alkylnaphthalene 30%.

3. diesel pour inhibitor according to claim 1 and 2 is characterized in that, the alpha-olefin of the preferred C15～C20 of said alpha-olefin; The aliphatic amide of the preferred C15～C20 of said aliphatic amide hydrocarbon; The alkylnaphthalene of the preferred C15～C20 of said alkylnaphthalene.