Method and catalyst for producing biological diesel oil by high-acid value grease

A high-acid value oil and biodiesel technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of poor purity of by-product glycerin and biodiesel yield Low, high raw material requirements and other issues, to achieve the effect of high yield of reaction products, increased yield, and simple process

Inactive Publication Date: 2007-11-21
青岛福瑞斯生物能源科技开发有限公司
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Problems solved by technology

[0003] The production methods of biodiesel mainly include chemical method and enzymatic method. Due to the high price of catalyst, long catalysis time and easy deactivation of catalyst, the enzymatic method is still far from industrialization: chemical method includes alkali catalysis and acid catalysis, and the efficiency of alkali catalysis High, low requirements for equipment, but this process has high requirements for raw materials, for high acid value oils with an acid value greater than 5, especially waste oils with high free fatty acid content (vegetable oil leftovers, waste oil, etc.) can not be used directly , Acid catalysis has low requirements on raw materials, but acid catalysts are mainly concentrated sulfuric acid, which has strong corrosion to equipment, long reaction time, low yield of biodiesel and poor purity of by-product glycerol, etc.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In reactor, add 100g waste grease (acid number 95), 2.5g composite catalyst, composite catalyst is by methyl alcohol 20g, composite catalyst is by the weight ratio of p-toluenesulfonic acid, tin tetrachloride and the vitriol oil by 1:1:1 Mixed, the p-toluenesulfonic acid was dissolved in methanol before mixing. The reaction temperature is 58°C, and the reaction time is 3.5h. After the reaction was finished, the layers were statically separated for 60 minutes. The upper layer was mainly fatty acid methyl ester and a small amount of methanol, and the lower layer was mainly glycerin, composite catalyst and a small amount of methanol. After the upper product was recovered methanol in a methanol distillation tower, it was washed with 15 ml of hot water at 65° C., centrifuged and separated, and the upper oil phase was removed by vacuum distillation to obtain 91.5 grams of fine biodiesel. The total reaction yield was 91.5%.

Embodiment 2

[0015] Add 100g of waste oil (acid value 95), 2.8g of composite catalyst, 28g of methanol into the reaction kettle, the reaction temperature is 60°C, and the reaction time is 3.8h. The composite catalyst is prepared by mixing p-toluenesulfonic acid, tin tetrachloride and concentrated sulfuric acid in a weight ratio of 1:1:1, and dissolving the p-toluenesulfonic acid with methanol before mixing. After the reaction was finished, the layers were statically separated for 60 minutes. The upper layer was mainly fatty acid methyl ester and a small amount of methanol, and the lower layer was mainly glycerin, composite catalyst and a small amount of methanol. The upper product was vacuum recovered methanol through a methanol distillation tower, washed with 15 ml of hot water at 70° C., centrifuged and separated, and the upper oil phase was removed by vacuum distillation to obtain 93.01 grams of fine biodiesel. The total reaction yield was 93.01%.

Embodiment 3

[0017] In reactor, add 100g waste grease (acid number 95), 3.0g composite catalyst (by the weight ratio of p-toluenesulfonic acid, tin tetrachloride and concentrated sulfuric acid mixed into by 1: 1: 1, mix with methanol Dissolve p-toluenesulfonic acid), methanol 33g, reaction temperature 63°C, reaction time 4h. After the reaction was finished, the layers were statically separated for 60 minutes. The upper layer was mainly fatty acid methyl ester and a small amount of methanol, and the lower layer was mainly glycerin, composite catalyst and a small amount of methanol. The upper product was vacuum recovered methanol through a methanol distillation tower, washed with 15 ml of hot water at 75°C, centrifuged and separated, and the upper oil phase was removed by vacuum distillation to obtain 93.25 grams of fine biodiesel. The total reaction yield was 93.25%.

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Abstract

A composite catalyst for biological diesel-oil by high-acidity grease is carried out by mixing methyl sulfonic acid with tin tetrachloride and concentrated sulfuric acid in proportion of 1:1:1, and esterification reacting by composite catalyst 2.5-3% at 58-63 degree for 3.5-4 hrs to convert waste grease into biological diesel-oil. It's fast, has gentle reactive condition, higher recovery rate and better quality.

Description

technical field [0001] The invention relates to a new method for producing biodiesel through transesterification of oil with high acid value under the action of a composite catalyst, and belongs to the technical field of producing biodiesel from waste oil. Specifically, waste oils from various sources are prepared through esterification reaction under the action of a composite catalyst to prepare biodiesel. Background technique [0002] Biodiesel is a clean and safe new fuel that can replace petrochemical diesel produced from renewable resources such as vegetable oil or animal oil. The main components are ester compounds formed by long-chain saturated unsaturated fatty acids such as palmitic acid, stearic acid, oleic acid, linoleic acid and methanol or ethanol. Biodiesel has the characteristics of renewable, easy biodegradation, low combustion pollutant emissions, and low greenhouse gas emissions. Biodiesel has similar properties to petrodiesel. And it has its unparallele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00B01J31/04C11C3/04
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 杨庆利禹山林朱凤潘丽娟曹玉良
Owner 青岛福瑞斯生物能源科技开发有限公司
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