A method for producing biodiesel from high acid value animal and vegetable waste oil

A biodiesel, animal and plant technology, applied in biofuel, petroleum industry, fatty acid esterification, etc., can solve the problems of long separation time of glycerol and methyl ester, high requirements for equipment and materials, and incomplete separation, so as to achieve easy separation, The effect of cheap price and fast esterification speed

Active Publication Date: 2016-01-20
刘火成
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  • Abstract
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Problems solved by technology

[0005] The object of the present invention is to, aiming at the deficiencies in the prior art, provide a kind of pre-esterification using iron sulfate as the esterification catalyst, the catalyst can be recycled and reused; ethyl acetate is added in the transesterification process, the reaction speed is fast, and the separation of glycerin is thorough. The yield is high, and no process wastewater is produced in the whole production process; to solve the problems of the prior art that using sulfuric acid as the esterification catalyst is highly corrosive, requires high equipment and materials, and the separation time of glycerin and methyl ester after transesterification is long and the separation is not complete. Method for producing biodiesel by utilizing waste animal and vegetable oil with high acid value

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  • A method for producing biodiesel from high acid value animal and vegetable waste oil

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Embodiment 1

[0027] (1) Degumming of waste animal and vegetable oils with high acid value: Take 1000kg of acidified oil (acidified oil with an acid value of 140mgKOH / g), put it into a stirring and vacuum reaction device, add 5kg of phosphoric acid, and control the temperature in the device to 140 ℃, after keeping for 15 minutes, add activated clay 5kg, stir for 15 minutes, filter to obtain degummed grease.

[0028](2) Pre-esterify the degummed oil: Take 1000kg of the degummed oil obtained in step (1), add it to a reaction device with stirring and condensation, then add 25kg of iron sulfate, stir, and keep the temperature in the esterification device at 110°C; Methanol is evenly injected into the bottom of the esterification unit through the metering pump through the methanol input pipe to the nozzle. The methanol is rapidly vaporized in an environment of 110°C and reacts with the pretreated oil under the action of the iron sulfate catalyst; the methanol injection rate is per hour 300kg; at...

Embodiment 2

[0035] (1) Degumming waste animal and vegetable oils with high acid value: take 1000kg of gutter oil (acid value 75mgKOH / g), put it into a stirring and vacuum reaction device, add 3kg of phosphoric acid, control the temperature inside the device to 140°C, After keeping for 15 minutes, add 4 kg of activated clay, stir for 15 minutes, and filter to obtain degummed grease.

[0036] (2) Pre-esterify the degummed oil: take 1000kg of the degummed oil obtained in step (1), add it to a reaction device with stirring and condensation, then add 30kg of iron sulfate, stir, and keep the temperature in the esterification device at 120°C; Methanol is evenly injected into the bottom of the esterification unit through the metering pump through the methanol input pipe to the nozzle. The methanol is rapidly vaporized in an environment of 110°C and reacts with the pretreated oil under the action of the iron sulfate catalyst; the methanol injection rate is per hour 260kg; at the same time, open th...

Embodiment 3

[0041] (1) Degumming of animal and vegetable waste oil with high acid value: Take 1000kg hog oil (acid value 15mgKOH / g), put it into a stirring and vacuum reaction device, add 2kg of phosphoric acid, control the temperature inside the device at 140°C, and keep After 15 minutes, add 3 kg of activated clay, stir for 15 minutes, and filter to obtain degummed grease.

[0042] (2) Pre-esterify the degummed oil: Take 1000kg of the degummed oil obtained in step (1), add it to the reaction device with stirring and condensation, then add 20kg of iron sulfate, stir, and keep the temperature in the esterification device at 120°C; Methanol is evenly injected into the bottom of the esterification unit through the metering pump through the methanol input pipe to the nozzle. The methanol is rapidly vaporized in an environment of 120°C and reacts with the pretreated oil under the action of an iron sulfate catalyst; the injection rate of methanol is 1 hour 230kg; at the same time, open the con...

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Abstract

The invention relates to a preparation method for producing biodiesel by means of animal and plant waste oil at a high acid value, and belongs to the technical field of energy-saving environment-friendly biodiesel manufacturing. The method is characterized in that the collected animal and plant waste oil at the high acid value is processed according to the steps of degumming, pre-esterification, ester exchange, adsorption and decoloring and the like. Ferric sulfate is taken as a pre-esterification catalyst, is low in price and easy to take, does not have high requirements for a reaction kettle and is easy to separate after catalyzation is finished; the catalyst can be reused after being processed, and cost is effectively reduced. During the ester exchange stage, ethyl acetate is added, the reaction speed is increased, complete separation of coarse methyl ester and glycerin is accelerated, washing is not needed in the refining process of the coarse methyl ester, and waste water is prevented from being produced. The yield of products produced in the method is high, and the products meet the requirement of the GB / T2007 standard in China about biodiesel (BD100) for diesel fuel mixing. No waste water is produced in the whole process of production, and the method is environmentally friendly.

Description

technical field [0001] The invention relates to a method for producing biodiesel by using high-acid value animal and vegetable waste oil, and belongs to the technical field of energy-saving and environment-friendly biodiesel manufacturing. Background technique [0002] Fatty acid esters formed by combining fatty acids of animal and vegetable oils and other oils (such as microorganisms, etc.) with lower alcohols are called biodiesel. The sulfur dioxide contained in the combustion exhaust gas of biodiesel is low, and the pollution to the atmospheric environment is extremely small. The biodegradability of biodiesel is as high as 98%, and the degradation rate is twice that of ordinary diesel, which can greatly reduce the pollution to the environment in case of accidental leakage. More importantly, since the raw materials for producing biodiesel are automatic and vegetable oils, the materials come from a wide range of sources, and can be infinitely regenerated, so it has become a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/10C10L1/02
CPCY02E50/10
Inventor 刘火成肖源昆
Owner 刘火成
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