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Dry degumming method of raw abandoned oil used for producing biodiesel

A technology of biodiesel and degumming method, which is applied in the field of pretreatment and processing of biodiesel raw materials, and achieves the effects of simple operating conditions, reduced product cost, and reduced requirements for filter membranes and operating conditions

Inactive Publication Date: 2012-01-04
HUNAN ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to overcome the defects of existing degumming methods, and provide a method with simple process, high product yield, low production cost, energy saving, environment-friendly, and suitable for degumming of biodiesel raw material oil

Method used

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  • Dry degumming method of raw abandoned oil used for producing biodiesel
  • Dry degumming method of raw abandoned oil used for producing biodiesel
  • Dry degumming method of raw abandoned oil used for producing biodiesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Silicone ∶ white clay=1 ∶ 3 Mix well; activate at 150-200 ℃ for 50-100 min. It is the degumming adsorbent.

[0015] Take 500 Kg of crude waste oil that has been pre-passed through the fence and introduce it into the reactor through the pipeline, heat it to 105 ° C, control the vacuum degree to 0.090 MPa, and stir at a speed of 105 r / min. After 50 min of dehydration under reduced pressure, no bubbles are generated on the surface of the layer; Cool down to 98°C, then add 0.2% compound acid (concentrated phosphoric acid) ∶ Citric acid=2 ∶ 1) After adding the acid, reduce the stirring speed to 50 r / min, the temperature is 100 °C, and react for 70 min. After completion, 1.0% degumming adsorbent by weight of oil was added, and the reaction was continuously stirred for 30 min at a vacuum degree of 0.090 Mpa and a temperature of 120 °C, and the stirring speed was controlled at 40 r / min. The temperature of the raw material is lowered to 90°C, the pressure of the filter pres...

Embodiment 2

[0019] Silicone ∶ white clay=1 ∶ 4 Mix evenly; activate at 150-200 °C for 50-100 min. It is the degumming adsorbent.

[0020] 2.0 tons of crude waste oil that has passed through the fence is introduced into the kettle through the pipeline, heated to 120 ℃, the vacuum degree is controlled to 0.098MPa, and the stirring speed is 100 r / min. After 30 minutes, there is no bumping phenomenon of the material and no bubbles on the surface of the oil layer. Cool down to 97 °C, add a compound acid reagent (concentrated phosphoric acid: citric acid 2:1) with 0.8% of the weight of oil, and then reduce the stirring speed to 60 r / min, the reaction temperature is 110 °C, and the reaction time is 90 min . After completion, 2.0% of the weight of grease was added to the activated degumming adsorbent, the vacuum degree was controlled to 0.098 Mpa, and the temperature was 130 °C under continuous stirring for 60 min, and the stirring speed was controlled at 60 r / min. The temperature was lowered...

Embodiment 3

[0023] Silicone ∶ white clay=1 ∶ 5 Mix well; activate at 150-200 °C for 50-100 min. It is the degumming adsorbent.

[0024] 1000 Kg of pre-filtered crude waste oil is introduced into the kettle through the pipeline, heated to 110-115 ℃, the vacuum degree is controlled at 0.095 MPa, and the stirring speed is 105 r / min. No bubbles were generated. Cool down to 98°C, add 0.6% compound acid reagent (concentrated phosphoric acid: citric acid 2:1) of oil weight, reduce the stirring speed after adding acid, control the stirring speed at 55 r / min, the reaction temperature is 100°C, and the reaction time is 85 min. After completion, degumming adsorbent with an oil weight of 1.5% was added, the vacuum degree was 0.095 Mpa, and the temperature was 120 °C under continuous stirring for 50 min, and the stirring speed was controlled at 60 r / min. The temperature was slightly lowered to 100 °C, and the pressure of the filter press was controlled at 0.45 MPa. Pass through the filter press ...

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Abstract

The invention discloses a dry degumming method of raw abandoned oil used for producing biodiesel. The method comprises steps that: (1) the abandoned oil is dehydrated; (2) a composite acid with a weight of 0.2 to 1.0% of that of the abandoned oil is added to the abandoned oil, wherein the composite acid is composed of strong phosphoric acid and citric acid according to a ratio of 2:1; the mixture is subject to a reaction for 50 to 90min under a reaction temperature of 100 to 120 DEG C, such that phospholipids form macro flocculating constituents; (3) a degumming absorbent with a mass of 0.5 to 2.0% of that of the raw materials is added to the raw materials; a vacuum degree is controlled at 0.080 to 0.098Mpa, a temperature is controlled at 110 to 130 DEG C, and the mixture is stirred for 30 to 60 min with a rate of 50 to 70r / min; (4) the mixture is processed through press filtration, and an obtained filtrate is a production raw material of biodiesel. The method provided by the invention has advantages of simple technology, high yield, and low production cost. Also, the method is energy saving and environment friendly.

Description

Technical field [0001] The present invention is a pre -processing process for biological diesel raw materials, which involves a method of desertoring method of abandoned oil drying. Background technique [0002] At present, the shortage of raw materials for biological diesel is still the primary factor restricting biological diesel prices and large -scale production.The production of biological diesel such as ditch oil, water oil, acidized oil, and acidified oil can not only prevent waste oil backflow dining tables, but also turn waste into treasure, which solves the problem of waste oil from the real sense.However, the waste oil contains a large amount of glue, which will cause many harmful factors to the product: affect the stability of the oil, easy to absorb hydrolysis; affect the refining effect of raw oil oil, cause emulsification, increase the amount of luminantThe application of products, foam, burst, etc. during distillation and heating.Existing dehydration methods, such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00C11B3/10C11B3/04C11B13/00
CPCY02W30/74
Inventor 李昌珠张爱华刘汝宽肖志红李培旺张良波李力
Owner HUNAN ACAD OF FORESTRY
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