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A kind of catalyst of high acid value prickly ash seed oil esterification and acid reduction reaction and its application

A technology of prickly ash seed oil, esterification and acid reduction, applied in the direction of physical/chemical process catalyst, fatty acid esterification, petroleum industry, etc., to achieve the effect of reducing waste liquid discharge, easy separation and regeneration, and high catalytic activity

Inactive Publication Date: 2016-01-20
PLA SECOND ARTILLERY ENGINEERING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] So far, there has been no report on the use of expandable graphite as a catalyst to catalyze the esterification of free fatty acids in vegetable oils

Method used

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  • A kind of catalyst of high acid value prickly ash seed oil esterification and acid reduction reaction and its application
  • A kind of catalyst of high acid value prickly ash seed oil esterification and acid reduction reaction and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Use commercially available Zanthoxylum bungeanum seed oil as raw material to carry out esterification and reduce acidity, take catalyst components according to the following proportions and mix and react to prepare esterification reaction catalyst: A component 50 mesh natural flake graphite 4g, B component potassium permanganate 0.35g, C component concentrated sulfuric acid 20mL. Weigh 4g of graphite, add 0.35g of potassium permanganate powder, stir well, then slowly add 200mL of concentrated sulfuric acid to react for 90min, after the reaction is completed, wash with water until neutral and carry out suction filtration, and dry at 60-80°C to obtain expandable graphite catalyst.

[0044] First degumming and decolorizing the crude pepper seed oil, then washing with water to remove impurities in the oil and separating, and then drying the oil with anhydrous sodium sulfate or silica gel. The oil chromaticity value is detected by spectrophotometry, and its value is less th...

Embodiment 2

[0046] Using the same oil and fat as in Example 1 as a raw material for esterification and acid reduction, the esterification reaction catalyst is sulfuric acid, and the experiment is carried out under the same esterification reaction conditions, methanol is recovered by distillation, and the oil phase is repeatedly washed to neutrality, separated and dried , the acid value of the dried oil phase was measured to be 1.56 mgKOH / g, and the conversion rate of the esterification reaction was 97.2%.

[0047] Can find out by contrast, adopt the esterification reaction catalyst of the present invention and acidification method adopt sulfuric acid to make catalyzer compare, under the same esterification reaction condition, its effect of reducing acid is slightly better, and the esterification reaction catalyst of the present invention is reused 4 times It can also ensure the effectiveness of the reaction result, is easy to separate, and greatly reduces the discharge of polluting wastewa...

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Abstract

The invention relates to a catalyst used in an esterification reaction during the pretreatment process of high-acid value prickly ash seed oil and a method for carrying out esterification and deacidification by the use of the catalyst. The catalyst is expansible graphite obtained by an intercalation reaction between sulfuric acid and natural flake graphite of 50 meshes under the action of an oxidizing agent potassium permanganate, and is a heterogeneous catalyst specifically prepared by a synthetic reaction of three components A, B and C, wherein the component A is natural flake graphite of 50 meshes, the component B is potassium permanganate and the component C is concentrated sulfuric acid. The invention has beneficial effects as follows: the catalyst is green and environmentally friendly in comparison with the prior art, has advantages of high catalytic activity, short reaction time and high yield, is noncorrosive to equipment, will not pollute the environment, is easy for separation and regeneration treatment, can effectively promote the esterification reaction to make itself meet subsequent preparation requirements of biodiesel, and is adopted to reduce discharge and processing costs of effluents, minimize processing procedures of the final product and effectively raise quality of the prickly ash seed oil product.

Description

technical field [0001] The invention belongs to the technical field of biodiesel preparation, and relates to a catalyst for providing qualified raw materials for preparing biodiesel. In particular, it relates to a catalyst used in the esterification reaction of pepper seed oil with high acid value in the pretreatment process and a method for esterifying and reducing acidity by using the catalyst. Background technique [0002] Zanthoxylum bungeanum oil has the characteristics of low price, abundant sources and inedibility, and it has not been effectively utilized in industry [1] . If it is used to prepare biodiesel, it can not only reduce the production cost, but also be environmentally friendly. However, Zanthoxylum bungeanum oil has a high acid value, so it must be pretreated to reduce acidity, so as to meet the requirements of subsequent transesterification to prepare biodiesel [2] . The acid reduction methods of free fatty acids include extraction, alkali refining and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/055C11C3/04C10L1/02
CPCY02E50/10
Inventor 张剑王煊军李舒艳韩启龙
Owner PLA SECOND ARTILLERY ENGINEERING UNIVERSITY