Method for preparing biological diesel oil using high acid value cottonseed oil

A technology of biodiesel and cottonseed oil, which is applied in the fields of biological raw materials, biofuels, petroleum industry, etc., can solve the problems of prolonging the reaction time, difficult to achieve, and difficult to separate and wash the reaction product from soap.

Inactive Publication Date: 2006-11-22
菏泽华瑞油脂有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are many shortcomings and deficiencies in the above-mentioned production process in the actual production process, mainly in the following aspects: First, from a technical point of view, no matter what kind of oil is used as raw material to produce biodiesel, and no matter whether the production process is intermittent or continuous, it will affect the quality of raw material oil. Strict requirements are put forward for the acid value and water content, that is, the acid value of raw oil is required to be less than 1.0mgKOH / g, and the water content is less than 0.06%.
Because too high moisture content and acid value can prolong reaction time, the conversion rate of fatty acid methyl ester is low, and the soap that produces brings many difficulties to the separation and washing of reaction product, causes the purity and the yield of by-product glycerol to reduce simultaneously
Therefore, a large amount of high acid value oils such as cottonseed oil cannot be effectively utilized at present
Second, the production of biodiesel from vegetable oil with low acid value and high quality has the problem of competing with the public for oil.
This is theoretically feasible and can be done in the laboratory, but it is difficult to achieve large-scale industrial production, because methanol is a very hydrophilic chemical substance

Method used

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  • Method for preparing biological diesel oil using high acid value cottonseed oil
  • Method for preparing biological diesel oil using high acid value cottonseed oil
  • Method for preparing biological diesel oil using high acid value cottonseed oil

Examples

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Effect test

example 1

[0035] Example 1, high acidity cottonseed oil is produced biodiesel

[0036] ①Main raw materials and medicines: locally produced wool cotton oil, the measured acid value is 38mg KOH / g; anhydrous methanol, concentrated sulfuric acid, and KOH are all of analytical grade.

[0037] ②Operation steps:

[0038] ●Take 400g of wool cotton oil in a beaker, heat it to 75°C, add hot water at 78°C and stir for 30 minutes, settle for 4 hours, and use a separatory funnel to release the oil residue.

[0039] ●Take 200 g of washed cotton oil in a triangular beaker, add 30 g of anhydrous methanol and 2 mil of concentrated sulfuric acid. Keep the temperature on the water bath at 65-70°C and keep shaking. React for 3 hours.

[0040] ●Pour the mixture into a separatory funnel and let it stand for 2 hours. Release the aqueous glycerin. Then transfer the light phase part into the triangular beaker.

[0041] ●Add 10g of anhydrous methanol and 2mil of concentrated sulfuric acid into the triangul...

example 2

[0048] Example 2, medium acidity cottonseed oil is produced biodiesel

[0049] ①Main raw materials and medicines: locally produced wool cotton oil, the measured acid value is 5.6mg KOH / g; anhydrous methanol, concentrated sulfuric acid, and KOH are all of analytical grade.

[0050] ②The operation steps are as follows: figure 2 Shown:

[0051] ●Pump 500 kg of wool cotton oil into the hydration tank, stir and heat to 85°C, add light alkaline water with a temperature slightly higher than 87°C, settle for 6 hours, and release the oil foot;

[0052] Turn on the vacuum pump to make the first reactor in a vacuum state, suck the washed cotton oil into the reactor, and then inhale 12-15% of methanol by weight of the oil and concentrated sulfuric acid of 1% by weight of the oil;

[0053] ●Break the vacuum, start the stirrer (rotating speed is 60rpm), maintain the temperature in the kettle at 60-70°C, and react for 3 hours;

[0054] ●Stop stirring, settling for 2 hours, release the wa...

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Abstract

The invention discloses a biological diesel preparing method from high-acid value cotton seed oil, which comprises the following steps: the first step: adopting concentrated sulfuric acid as catalyst under normal pressure and temperature; injecting certain quantity of carbinol; reacting most of glyceride and a little of aliphatic acid with carbinol; sedimenting and separating glycerin and water; the second step: adopting concentrated sulfuric acid as catalyst under normal pressure and temperature; injecting excessive carbinol; lengthening reacting time to react glyceride and aliphatic acid with carbinol. The invention can utilize cotton oil reasonably, which reduces the environmental pollution in the refinery course.

Description

(1) Technical field [0001] The invention relates to a method for preparing biodiesel, in particular to a method for preparing biodiesel from cottonseed oil with high acid value. (2) Background technology [0002] Biodiesel is fatty acid methyl ester, which can be used as a substitute for petroleum fuel-diesel. It is named biodiesel because of its renewable resources and biodegradability. Biodiesel is mainly produced from vegetable oil (such as cottonseed oil, rapeseed oil, soybean oil), animal oil (leftover oil from meat processing plants) or instant noodles, sub-waste oil from the catering industry, swill oil, oil foot oil from oil processing plants, and salads The deodorized distillate produced in the oil process is used as a raw material. At a certain temperature, acid, alkali or enzyme is used as a catalyst to undergo an alcoholysis reaction (ester exchange) with methanol (or other lower alcohols) to generate the corresponding fatty acid methyl ester and glycerin. , the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00
CPCY02E50/10Y02P30/20
Inventor 吴道银
Owner 菏泽华瑞油脂有限责任公司
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