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Method used for catalytic synthesis of fatty acid methyl ester with roasted hydrocalumite

A technology of fatty acid methyl ester and hydrocalumite, which is applied in the directions of fatty acid esterification, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as environmental pollution, discharge a large amount of salty wastewater, etc. , The effect of high surface alkali density and uniform distribution

Pending Publication Date: 2019-02-01
湖南雄创新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the literature uses hydrotalcite and hydrocalumite to catalyze the synthesis of fatty acid methyl esters, the catalysts are all based on soluble salts (such as magnesium chloride, calcium chloride, aluminum sulfate, etc.) and alkalis (sodium hydroxide and sodium carbonate). Prepared by co-precipitation method, a large amount of salty wastewater will be discharged during the preparation process, causing environmental pollution, and its catalytic performance needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of catalyst: add 0.08 mol calcium hydroxide, 0.04 mol aluminum hydroxide and 0.02 mol sodium carbonate to 200 mL of water, stir and react at 80 °C for 2 hours, stop stirring, and react at 80 °C for 17 hours; filter, wash, dry, After pulverization, hydrocalumite Ca is obtained 2+ 2 / 3 Al 3+ 1 / 3 (OH) 2 (CO 3 2- ) 1 / 6 ·2H 2 O; the obtained hydrocalumite is calcined at 600° C. for 4 hours to obtain the calcined hydrocalumite.

Embodiment 2

[0019] Add 19.4g soybean oil, 5.2g methanol and 0.583g calcined hydrocalumite catalyst prepared in Example 1 into the reactor, turn on stirring, heat up to 65°C, react for 4 hours, cool, centrifuge, sample and detect, and the product is collected. The rate is 98%.

Embodiment 3

[0021] Add 19.4g soybean oil, 5.2g methanol and 1.553g calcined hydrocalumite catalyst prepared in Example 1 into the reactor, turn on stirring, heat up to 65°C, react for 4 hours, cool, centrifuge, sample and detect, and the product is collected. The rate is 91%.

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PUM

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Abstract

The invention discloses a method used for catalytic synthesis of fatty acid methyl ester with roasted hydrocalumite. According to the method, soybean oil and methanol are taken as raw materials, and synthesis of the fatty acid methyl ester is carried out under catalytic effect of roasted hydrocalumite. The structure general formula of the roasted hydrocalumite is Ca<2+><1-x>Al<3+><x>(OH)2(CO<3><2->)<x / 2>.mH2O, wherein 0.3<=x<=0.35, m is used for representing the number of crystal water, and 1<=m<=3. The roasted hydrocalumite is a product of hydrocalumite after 2 to 8h of roasting at 400 to 800DEG C. The advantages are that: the catalyst preparation process is simple, cost is low, product yield is high, and catalyst separation is convenient.

Description

technical field [0001] The invention relates to a method for synthesizing fatty acid methyl esters, in particular to a method for catalyzing the synthesis of fatty acid methyl esters with calcined hydrocalumite. Background technique [0002] Fatty acid methyl ester is a new type of green renewable resource, also known as biodiesel. Using biodiesel as a fuel can be added directly to current diesel engines without any modification to existing machines. [0003] At present, fatty acid methyl esters are mainly prepared by transesterification of oils and methanol, and the key technology of this process route lies in the development of high-efficiency catalysts. Various types of catalysts such as metal organic compounds, metal inorganic compounds and supported metal oxides have been reported in the literature. In 2005, Li Weimin (Journal of Chemical Engineering, 2005) and others found that Mg-Al composite oxides were used as catalysts to catalyze the transesterification of rapes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/02C11C3/10
CPCC11C3/10B01J23/007B01J23/02
Inventor 周喜韦妹成蒋邵武
Owner 湖南雄创新材料科技有限公司
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