Preparation method of biological diesel oil

A biodiesel and oil technology, applied in the preparation of liquid hydrocarbon mixtures, biological raw materials, biofuels, etc., can solve the problems of complex process, waste lye discharge, high cost, etc., and achieve simple and safe process route, mild reaction conditions, The effect of reducing waste discharge

Inactive Publication Date: 2007-03-14
张海军
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Problems solved by technology

[0009] At present, the production of biodiesel by transesterification mainly adopts chemical methods. The traditional chemical method transesterification uses homogeneous catalysts, such as NaOH, KOH, sodium methylate, etc., and the dosage is about 1%. The reaction temperature is generally the boiling point of methanol. The speed is fast and the conversion rate is high, but at the same time there are obvious disadvantages: the process is complicated, the alcohol must be excessive, and the subsequent process must have a corresponding alcohol recovery device; high energy consumption, dark color, because unsaturated fatty

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  • Preparation method of biological diesel oil
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  • Preparation method of biological diesel oil

Examples

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[0036] Example 1

[0037] Preparation of solid catalyst A:

[0038] The molar ratio of titanium tetrachloride and aluminum trichloride is 1:2 to make a 30% solution. 1kg of catalyst A requires 435g titanium tetrachloride and 584g aluminum trichloride. 28% ammonia water is used as a precipitant to control PH The value is 7-8. The precipitate is filtered, washed, ground, sieved through 100 mesh, immersed in 0.5mol / L sulfuric acid for 2 hours, filtered with suction, dried at 110°C, activated at 430°C for 3h, cooled, and placed in a desiccator After medium drying, the composite titanium sulfate super solid acid SO 4 2- / TiO 2 -Al 2 O 3 . The solid catalyst A is packed in the fixed-bed reactor A, and the amount of the solid catalyst A is 2% of the mass of the wool cottonseed oil, which is replenished as the reaction progresses.

[0039] Preparation of solid catalyst B: 1020g Al 2 O 3 Can produce 1kg solid catalyst B.

[0040] Use 20% KNO 3 Solution, the Al 2 O 3 Powder immersion for two...

Example Embodiment

[0052] Example 2

[0053] Preparation of solid catalyst A:

[0054] Make a 30% solution of chromium tetrachloride and aluminum trichloride at a molar ratio of chromium to aluminum of 1:2, use 28% ammonia water as a precipitating agent, control the pH to 7-8, and filter and wash the precipitate , Grind, go through a 100-mesh sieve, immerse in 0.5mol / L sulfuric acid for 2 hours, filter with suction, dry at 110°C, activate at 480°C for 3h, cool, and dry in a desiccator to obtain composite titanium sulfate super solid acid SO 4 2- / ZrO 2 -Al 2 O 3

[0055] After removing the mechanical impurities, the rapeseed oil enters the raw material storage tank. After being heated to 80°C, it enters the vacuum degree of -0.095Mpa and the dehydrator with a temperature of 130°C for dehydration and then enters the No. 1 raw material tank for standby to avoid moisture damage. The effect of catalyst activity.

[0056] Ethanol and co-solvent tetrahydrofuran are prepared according to the volume ratio o...

Example Embodiment

[0063] Example 3

[0064] The preparation method is the same as in Example 1, the raw material is agricultural seed oil, the activation condition of the solid catalyst A is activation at 450° C. for 3 hours, and the other process conditions are the same.

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Abstract

The present invention relates to biodiesel oil preparing process, and provides one biodiesel oil preparing process with solid acid and solid alkali as catalyst to lower the activating energy and raise the reaction speed. The biodiesel oil preparing process includes the following steps: reacting dried grease with high free fatty acid content, methanol or ethanol, and cosolvent in the molar ratio of 1 to 6-1 to 6.05 in the first fixed bed reactor with solid catalyst A at 60-65 deg.c for about 3 hr; separating the oil phase from others; reacting the oil phase in the second fixed bed reactor with solid catalyst B with methanol or ethanol and cosolvent at 60-65 deg.c for about 3 hr; distilling out methanol or ethanol and cosolvent; separating the biodiesel oil from glycerin phase; and distilling the biodiesel oil phase to obtain biodiesel oil product. The catalyst of the present invention has high catalytic activity and can lower the activating energy and raise the reaction speed.

Description

technical field [0001] The invention relates to a method for preparing biodiesel from oil high in free fatty acid by using solid acid and solid base as catalysts for heterogeneous catalytic reaction. Background technique [0002] Diesel is an important fuel oil and the main power fuel for many large machinery (such as trucks, ships, diesel locomotives and generators, etc.). It has the advantages of high power and low price, so it has been widely used. According to estimates, the current annual demand for diesel in my country has exceeded 80 million tons. [0003] Mineral diesel is mainly obtained through petroleum refining process. At present, domestic oil production capacity is far lower than the domestic demand for oil products, which requires a large amount of imports. Due to changes in the international situation, the stability of oil imports is also threatened by some potential factors. If the situation of oil imports changes greatly, it will seriously affect the sust...

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Application Information

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IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 张海军
Owner 张海军
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