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Method for preparing diesel flow improver

A flow improver and diesel technology, which is applied in the petroleum industry, fuel, liquid carbon-containing fuel, etc., can solve problems such as low solubility, unfavorable copolymer synthesis, and unsatisfactory copolymerization effect, and achieve the effect of reducing costs

Active Publication Date: 2005-10-05
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] US 4650596 introduces the method of using acrylate and acrylamide copolymer as crude oil pour point depressant. This patent uses methyl ethyl ketone or toluene as solvent, and the reaction temperature is 95-105 ° C. Since acrylamide is only slightly soluble in toluene, it is The solubility in ketone is not high, so the copolymerization effect is not ideal; and the acrylamide monomer will suddenly polymerize when it is close to its melting point (84.5 ° C), and the reaction temperature is too high, which is not conducive to the synthesis of the copolymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Weigh 5.92 grams (0.02mol) of hexadecyl acrylate, 2.16 grams (0.03mol) of acrylamide, and 0.081 grams of dibenzoyl peroxide, and put them in a Add a drying tube plugged with absorbent cotton to prevent air from entering the reactor), add 20 milliliters of ethanol, feed nitrogen for 10 minutes, replace the air in the reactor, start stirring, and heat at a constant temperature of 70-80°C. After reacting for 4 hours, the reflux tube of the condenser was removed, replaced with a distillation device, the ethanol was evaporated, and 8.08 grams of diluent oil was added to make 50% additive A.

[0025] Weigh 0.08 g of additive A, add it to 50 g of diesel oil, and measure its cold filtration point, freezing point, and cloud point according to the methods of ASTMD2274, GB510-83, and GB6986-86, and the results are shown in Table 1.

example 2

[0027] Add another dropping funnel to the experimental device of Example 1, place acrylamide in the dropping funnel, add 15 milliliters of ethanol, shake to dissolve. The amount of ethanol in the reactor was changed to 5 milliliters, and the amounts of other substances were unchanged. Nitrogen was introduced for 10 minutes, the air in the reactor was replaced, stirring was started, and the ethanol solution of acrylamide was added dropwise when it was heated to 72°C, and the dropwise addition was completed in about 30 minutes. Keep the temperature at 70-80° C., react for 4 hours, remove the condensing reflux tube, replace it with a distillation device, evaporate ethanol, add 8.08 g of diluent oil, and prepare 50% additive B. Test the same as example 1. The results are shown in Table 1.

example 3

[0029] On the basis of example 2, solvent ethanol is changed to the mixture of ethanol and gasoline, 10 milliliters of ethanol and acrylamide are made into solution and added in the dropping funnel, 5 milliliters of ethanol and 15 milliliters of gasoline are added in the reactor, and other conditions are with example 2, Make Additive C. Test the same as example 1. The results are shown in Table 1.

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PUM

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Abstract

This invention is a preparation method of diesel oil-flowing improver, including: in azotes atmosphere and the organic agent containing 10-100% ethanol polymerize non-saturable amide and acroleic acid alkyl ester under 60-84deg.C. The alkyl carbon chain of the acroleic acid alkyl ester is C6-C24. The non-saturable amide is selected from acrylamide, methacrylamide, N-hydroxyl monomer. The mole ratio of acroleic acid ester and non-saturable amide is 0.1-3:1. All agents are ethanol or the mixtures of ethanol and the apolar solvents such as petroleum, benzene, methylbenzene, xylene and etc. The characteristic of this invention is that it uses the ethanol organic solvent as polymerization reaction solvent, so the diesel oil-flowing improver has good utilization effect, fine anti-wax deposition, and effectively lowers the cooling point of diesel oil and has good effect on the narrow cuts diesel oil with high wax contents.

Description

technical field [0001] The invention relates to a preparation method of a diesel flow improver. technical background [0002] The low-temperature fluidity of diesel oil is not only related to whether the fuel supply system of diesel engine can supply oil normally at low temperature, but also has a close relationship with whether the storage and transportation of diesel oil can be carried out normally at low temperature. The low temperature fluidity of diesel oil has a great relationship with the content and distribution of normal paraffins in diesel oil. As the temperature of the oil decreases, the affinity between the moving chain wax molecules increases. When the affinity between alkanes, aromatic hydrocarbons, and small molecule normal alkanes), the wax molecular chains are arranged in parallel along the main axis and bonded together to form crystal nuclei, and the crystal nuclei continue to grow, forming flaky, layered, and needle-shaped wax crystals , Various forms of ...

Claims

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Application Information

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IPC IPC(8): C08F120/58C10L1/22
Inventor 段庆华吕军
Owner CHINA PETROLEUM & CHEM CORP
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