Method for preparing defoaming agent by swill-cooked dirty oil

A technology of gutter oil and defoamer, which is applied in separation methods, chemical instruments and methods, foam dispersion/prevention, etc., can solve problems such as poor compatibility of defoamers, difficulty in emulsification and dispersion, and wall-hanging defects, and achieve easy Good operation, compatibility, and no wall-hanging defects

Inactive Publication Date: 2017-01-04
杨增虎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention: the main method for treating waste oil at present is to produce biodiesel, but this technology has high cost and little effect, and the traditional defoamer has poor compatibility, is difficult to emulsify and disperse, and has wall hanging The problem of defect, the present invention provides a kind of method that utilizes waste oil to prepare defoamer, the present invention first with waste oil filtration, adds diatomite, removes particle impurity, eliminates chroma and degumming, and then it is mixed with hydrogen peroxide, Methanol and sodium bicarbonate are mixed evenly, and the reaction is carried out under the catalysis of high temperature and high pressure and nickel oxide. After the reaction is completed, the obtained reactant is mixed with diethylene glycol amine, sorbitan fatty acid ester, etc. Obtain a defoamer with good compatibility, easy emulsification and dispersion, and no wall-hanging defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Take 1L of waste oil and filter it, put it into a container, add 1.0kg of 60 mesh diatomite to it, stir it for 30 minutes at a speed of 500r / min, let it rest for 15 minutes, and then filter it under reduced pressure to obtain preliminary treatment of waste oil The preliminary treatment waste oil of above-mentioned gained is poured in the reactor, and adding massfraction wherein is 30% hydrogen peroxide respectively, and add-on is 10% of preliminary treatment waste oil volume, 100g nickel oxide, 500mL methyl alcohol, stir, then Add sodium bicarbonate to it to adjust the pH value to 7.2, use nitrogen to pressurize the reactor to 1.0MPa, control the temperature to 120°C, and stir for 1h at a speed of 200r / min; after the above stirring is completed, Stand still for 40 minutes, then cool down to room temperature, depressurize to standard atmospheric pressure, and then discharge, the resulting discharge is filtered under reduced pressure to obtain a filtrate, pour the filtrate...

example 2

[0022]Take 3L of waste oil and filter it, put it into a container, add 1.5kg of 80 mesh diatomite to it, stir it for 40 minutes at a speed of 600r / min, let it rest for 25 minutes, and then filter it under reduced pressure to obtain preliminary treatment of waste oil The preliminary treatment waste oil of above-mentioned gained is poured in reaction kettle, add massfraction wherein to it respectively and be 30% hydrogen peroxide, add-on is 20% of preliminary treatment waste oil volume, 200g nickel oxide, 600mL methyl alcohol, stir, then Add sodium bicarbonate to it to adjust the pH value to 7.5, use nitrogen to pressurize the reactor to 2.0MPa, control the temperature to 160°C, and stir for 3 hours at a speed of 300r / min; after the above stirring is completed, Stand still for 60 minutes, then cool down to room temperature, depressurize to standard atmospheric pressure, and then discharge, the resulting discharge is filtered under reduced pressure to obtain a filtrate, pour the f...

example 3

[0025] Take 2L waste oil and filter it, put it into a container, add 1.2kg of 70 mesh diatomite to it, stir it for 40 minutes at a speed of 600r / min, let it rest for 20 minutes, and then filter it under reduced pressure to obtain the preliminary treatment waste oil The preliminary treatment waste oil of above-mentioned gained is poured in the reactor, and adding massfraction wherein is 30% hydrogen peroxide respectively, and add-on is 15% of preliminary treatment waste oil volume, 150g nickel oxide, 550mL methyl alcohol, stir, then Add sodium bicarbonate to it to adjust the pH value to 7.5, use nitrogen to pressurize the reactor to 2.0MPa, control the temperature to 140°C, and stir for 2 hours at a speed of 250r / min; after the above stirring is completed, Stand still for 50 minutes, then cool down to room temperature, depressurize to standard atmospheric pressure, and then discharge, the resulting discharge is filtered under reduced pressure to obtain a filtrate, pour the filtr...

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Abstract

The invention discloses a method for preparing a defoaming agent by swill-cooked dirty oil, and belongs to the field of waste utilization. Biodiesel is produced according to a current main method for treating the swill-cooked dirty oil, the technology is high in cost and little in effect, and a traditional defoaming agent has the problems of poor compatibility, difficulty in emulsion dispersion and hanging defects. According to the method for preparing the defoaming agent by the swill-cooked dirty oil, the swill-cooked dirty oil is firstly filtered, diatomite is added, particle impurities are removed, chromaticity and degumming are eliminated, the swill-cooked dirty oil is uniformly mixed with hydrogen peroxide, methanol and sodium bicarbonate, reaction is performed at high temperature, under high pressure and under catalysis of nickel oxide, obtained reactants are mixed with divinyl glycol amine, dewatered sorbitan fatty acid ester and the like after reaction, and the defoaming agent with good compatibility and easiness in emulsion dispersion and without hanging defects can be obtained.

Description

[0001] This application is a divisional application with application number 2015107916545, application date of November 17, 2015, and title of the invention "A method for preparing a defoamer from waste oil". technical field [0002] The invention discloses a method for preparing a defoamer by using waste oil, belonging to the field of waste utilization. Background technique [0003] Waste oil is a general term for all kinds of low-quality oil in people's daily life. It can be divided into three categories: one is gutter oil in a narrow sense, that is, the greasy floating matter in the sewer or the oil that is simply processed and extracted from leftovers and leftovers (commonly known as swill) in hotels and hotels; The oil produced after the offal and pigskin processing and refining; the third is the oil used for frying food after it has been used more than a certain number of times, and then it is reused or re-used after adding some new oil to it. Waste oil comes from a w...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B01D19/04
CPCB01D19/0409
Inventor陈薇
Owner杨增虎