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Preparation method of diesel oil pour point reducer composition

A technology of diesel pour point depressant and composition, which is applied in mechanical equipment, gas/liquid distribution and storage, pipeline system, etc., can solve the problems of complicated operation steps, pollution of pour point depressant, etc. coagulation effect

Inactive Publication Date: 2004-02-18
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This pour point depressant will cause certain pollution to the environment, and the operation steps are complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] This example is the preparation of a diesel pour point depressant composition.

[0025] Put 9.8g (0.1mol) of maleic anhydride and 100g of xylene in a reactor equipped with electric stirrer, thermometer, reflux condenser, and nitrogen gas introduction tube, and pass nitrogen gas for 5 to 10 minutes, and keep a weak nitrogen gas Flow, heat and stir, heat up to 70-80°C, add 0.2g benzoyl peroxide, 10.4g (0.1mol) styrene, heat up to 80-90°C, and keep warm for 5-6 hours. 10.7g (0.05mol) tetradecyl alcohol, 12.1g (0.05mol) cetyl alcohol, 13.5g (0.05mol) stearyl alcohol, 14.9g (0.05mol) eicosanol and 2.0g p-toluenesulfonic acid were added to the reactor , heated up to 140-150° C. for reflux reaction for 4-5 hours, cooled to room temperature, took a small amount of samples and measured the number-average molecular weight Mn=35294 by gel permeation chromatography.

example 2

[0027] This example is the preparation of a diesel pour point depressant composition

[0028] Place 9.8g (0.1mol) of maleic anhydride and 100g of xylene in a reactor equipped with an electric stirrer, a thermometer, a reflux condenser, a dropping funnel and a nitrogen inlet tube, feed nitrogen for 5 to 10 minutes, and Maintain a weak nitrogen flow, heat and stir, raise the temperature to 70-80°C, add 0.15g of benzoyl peroxide and 5.2g (0.05mol) of styrene, raise the temperature to 80-90°C, and keep it warm for 1 hour. Add 0.1 g of benzoyl peroxide and 5.2 g (0.05 mol) of styrene dropwise with a dropping funnel for 2 hours, and keep warm for 2 to 3 hours. Add 9.3g (0.05mol) dodecyl alcohol, 10.7g (0.05mol) tetradecyl alcohol, 12.1g (0.05mol) cetyl alcohol, 13.5g (0.05mol) stearyl alcohol and 2.0g p-toluenesulfonic acid into the reactor . Raise the temperature to 140-150°C, reflux for 4-5 hours, cool to room temperature, take a small amount of samples and measure the number-av...

example 3

[0030] This example is the effect of using the composition prepared in Examples 1-2 in diesel.

[0031] Two kinds of diesel oil were selected as the test oil, respectively (a) Lanhua-10 base oil (b) Lanhua-20 base oil. After adding pour point depressant, the effects of pour point depressant and cold filter point are shown in Table 1 .

[0032] Additives come

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PUM

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Abstract

A composite pour depressor for diesel oil is prepared through polymerizing reaction of styrene on maleic acid anhydride in organic solvent at 80-90 deg.C for 3-5 hr under action of trigger (peroxide or azo compound), open-loop esterifying reaction on primary alcohol at 130-160 deg.C for 3-7 hr under the existance of catalyst (toluenesulfonic acid or sulfuric acid), and mixing with the toluene or xylene arylhydrocarbon solvent. Its advantage is high pour depressing effect.

Description

[0001] Field [0002] The invention relates to a preparation method of a diesel oil pour point depressant composition. Background technique [0003] Most of the high-yield crude oil in my country is paraffin-based crude oil, and the refined diesel oil has a high wax content. During storage and transportation, as the temperature drops, the diesel oil will thicken and even solidify, which will affect the storage, transportation and loading and unloading of diesel oil. During the use of diesel oil, the presence of wax will also cause the blockage of the oil filter, which will affect the normal use of the vehicle. [0004] It is well known that these problems can be alleviated by adding pour point depressants to diesel. Diesel pour point depressant can not only improve the low-temperature flow performance of diesel, so that diesel can be used normally in low-temperature environment, but also has important significance in improving the production flexibility of refineries, saving ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/14C08F212/08C08F222/04F17D1/16
Inventor 石大川朴贞顺
Owner PETROCHINA CO LTD
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