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Amido polyving akohol poly-nitricether as improver of cetane number of diesel oil

A technology of polyvinyl alcohol and nitrates, which is applied in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc., can solve problems such as poor safety, poor application effect, and instability of cetane number improvers, and achieve a ten-fold improvement. Hexane number, the effect of increasing the cetane number and calorific value of diesel oil

Inactive Publication Date: 2011-08-03
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

, but these reported cetane number improvers are very unstable, poor in safety, and poor in application effect

Method used

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  • Amido polyving akohol poly-nitricether as improver of cetane number of diesel oil
  • Amido polyving akohol poly-nitricether as improver of cetane number of diesel oil
  • Amido polyving akohol poly-nitricether as improver of cetane number of diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 900kg pre-assembled (mass ratio H 2 SO 4 : HNO 3 :H 2 (O=56:40:4) mixed acid nitrating agent was added to a 1000-liter reaction kettle, and then 5 kg of urea was added, fully stirred for 10 minutes, and the temperature was kept not higher than 5°C. Then add 100kg of polyvinyl alcohol in 3 times with an interval of 5 minutes each time. The reaction temperature is controlled between 0°C and 5°C, good stirring efficiency is maintained, and the reaction time is 2.5 hours. After the reaction was completed, the mixture was separated and the mixed acid was separated. The remaining product was washed with water until it was neutral, and dried with anhydrous sodium sulfate until it became clear and transparent. In another reaction kettle, add sodium polysulfide solution 80kg (containing 30wt% sodium polysulfide) and heat up to 40°C, add 400kg of the above-mentioned nitration product polyvinyl alcohol polynitrate in 2 times under stirring conditions, after adding, react for 4...

Embodiment 2

[0038] 1000kg pre-prepared (mass ratio H 2 SO 4 : HNO 3 :H 2(0=55:40:3) mixed acid was added to a 1000-liter reactor, then 6kg of urea was added, stirred for 5 minutes, and the temperature was kept not exceeding 15°C, and a total of 150kg of polyvinyl alcohol was added in 3 times with an interval of 5 minutes each time. The reaction temperature was controlled between 0 and 15°C, and the reaction time was 2.5 hours. After the reaction was completed, the mixture was separated and the mixed acid layer was separated, and the upper layer was washed with water until neutral. Do not anhydrous sodium sulfate dry Directly add 90kg of sodium polysulfide reducing solution (containing 30wt% sodium polysulfide) to the above-mentioned water-washed to neutral supernatant, heat up to 50°C, and react for 60 minutes. After the reaction is completed, separate the reducing solution layer, and the supernatant Wash to neutrality, obtain product amino polyvinyl alcohol polynitrate of the presen...

Embodiment 3

[0044] 1000kg pre-prepared (mass ratio H 2 SO 4 : HNO 3 :H 2 (O=48:50:2) mixed acid nitrating agent was added to a 1000-liter reactor, and then 10 kg of urea was added, fully stirred for 10 minutes, and the temperature was kept not higher than 5°C. Then add 120kg of polyvinyl alcohol in 3 times with an interval of 5 minutes each time. The reaction temperature is controlled between 0°C and 5°C, good stirring efficiency is maintained, and the reaction time is 3 hours. After the reaction was completed, the mixture was separated and the mixed acid was separated. The remaining product was washed with water until it was neutral, and dried with anhydrous sodium sulfate until it became clear and transparent. In another reaction still, add sodium polysulfide solution 100kg (containing 30wt% sodium polysulfide) and be warming up to 40 ℃, add 500kg above-mentioned nitration product polyvinyl alcohol polynitrates in 2 times under stirring condition, feed completes, react 40 minute. ...

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Abstract

The invention relates to amido polyving akohol poly-nitricether as an improver of a cetane number of diesel oil as well as a preparation method and application thereof. The preparation method comprises the following steps of: nitrating polyving akohol in mixed acid; separating, purifying and aminating the polyving akohol to obtain a high calorific value multi-effect diesel oil cetane number improver. After the improver is directly added to diesel oil according to a ratio of 0.1 percent, the cetane number of the diesel oil can be greatly improved, the calorific value can also be increased, andmeanwhile, the improver has the effects of dispersing, catalyzing combustion, cleaning, eliminating smoke, resisting explosion, lubricating, clearing carbon deposits, saving energy and protecting theenvironment. The improver has small addition amount, low cost and obvious effect, and the integrated property of the improver is much higher than that of an alkyl mononitrate ester diesel oil cetane number improver.

Description

technical field [0001] The invention relates to a synthesis method of amino polyvinyl alcohol polynitrate, a cetane number improver for diesel oil, and belongs to the field of chemical additives. Background technique [0002] With the continuous improvement of engine performance, the requirements for diesel quality are getting higher and higher, especially the requirements for diesel cetane number indicators are getting higher and higher. Cetane number is an important indicator of diesel combustion performance, which has a great influence on the ignition performance of diesel, engine cold start, fuel consumption, exhaust emissions and combustion noise. The average cetane number of diesel oil in the world is about 50, while the standard of diesel oil in my country is between 40 and 45. As the degree of catalytic cracking of heavy oil continues to deepen, the cetane number of diesel oil will decrease accordingly, generally in the range of 30 to 40. After 2005, my country has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F16/06C08F8/30C10L1/236C10L10/12
Inventor 况作尧姚文君段崇义李向田
Owner LAIWU IRON & STEEL GRP