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Bio-diesel catalyst Ca-Mg-Zn-Al-O and preparation method thereof

A biodiesel and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of slow catalytic reaction rate, harsh requirements, poor activity, etc. , to achieve high catalytic activity, improve adaptability, and reduce harsh requirements

Inactive Publication Date: 2013-11-27
TAIYUAN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the two rankings, it can be seen that the Ca-Al-O catalyst has strong activity and fast catalytic reaction rate, but its ability to resist acid, water and saponification is poor, and it has strict requirements on raw materials; Zn-Al-O catalyst is resistant to acid, water and saponification. Strong water resistance and saponification resistance, loose requirements on raw materials, but poor activity, slow catalytic reaction rate

Method used

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  • Bio-diesel catalyst Ca-Mg-Zn-Al-O and preparation method thereof
  • Bio-diesel catalyst Ca-Mg-Zn-Al-O and preparation method thereof
  • Bio-diesel catalyst Ca-Mg-Zn-Al-O and preparation method thereof

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Effect test

Embodiment 1

[0023] A biodiesel catalyst Ca-Mg-Zn-Al-O, wherein the molar ratio n (Ca): n (Mg): n (Zn): n (Al): n (O) = 0.5:2:0.5:1:4.5.

[0024] Its preparation method is as follows:

[0025] (1), Moore ratio n (Ca): n (Mg): n (Zn): n (Al): n (OH - ): n (CO 3 2- ) =0.5:2:0.5:1:6:3, weigh 3.54gCa(NO 3 ) 2 4H 2 O (0.015mol), 15.38g Mg(NO 3 ) 2 ·6H 2 O (0.060mol), 4.46g Zn(NO 3 ) 2 ·6H 2 O (0.015mol) and 11.25g Al(NO 3 ) 3 9H 2 O (0.030mol), put it into a 250mL Erlenmeyer flask, add 100mL deionized water to dissolve to obtain aqueous solution A; weigh 7.20g NaOH (0.180mol) and 9.54g NaOH 2 CO 3 (0.090mol), put it into another 250mL Erlenmeyer flask, add 75mL deionized water to dissolve to obtain aqueous solution B.

[0026] (2) Put the aqueous solution A and the aqueous solution B into two constant-pressure dropping funnels respectively, put 100mL deionized water into a 500mL four-neck flask, turn on the stirrer, and adjust the two constant-pressure dropping funnel...

Embodiment 2

[0032] A biodiesel catalyst Ca-Mg-Zn-Al-O, wherein the molar ratio n (Ca): n (Mg): n (Zn): n (Al): n (O) = 0.3:2:0.7:1:4.5.

[0033] Its preparation method is as follows:

[0034] (1), Moore ratio n (Ca): n (Mg): n (Zn): n (Al): n (OH - ): n (CO 3 2- ) =0.3:2:0.7:1:6:3, weigh 2.13g Ca(NO 3 ) 2 4H 2 O (0.009mol), 15.38g Mg(NO 3 ) 2 ·6H 2 O (0.060mol), 6.25g Zn(NO 3 ) 2 ·6H 2 O (0.021mol) and 11.25g Al(NO 3 ) 3 9H 2 O (0.030mol), put it into a 250mL Erlenmeyer flask, add 100mL deionized water to dissolve to obtain aqueous solution A; weigh 7.20g NaOH (0.180mol) and 9.54g NaOH 2 CO 3 (0.090mol), put it into another 250mL Erlenmeyer flask, add 75mL deionized water to dissolve to obtain aqueous solution B.

[0035] (2) Put the aqueous solution A and the aqueous solution B into two constant-pressure dropping funnels respectively, put 100mL deionized water into a 500mL four-neck flask, turn on the stirrer, and adjust the two constant-pressure dropping funne...

Embodiment 3

[0041] A biodiesel catalyst Ca-Mg-Zn-Al-O, wherein the molar ratio n (Ca): n (Mg): n (Zn): n (Al): n (O) = 0.7:2:0.3:1:4.5.

[0042] Its preparation method is as follows:

[0043] (1), Moore ratio n (Ca): n (Mg): n (Zn): n (Al): n (OH - ): n (CO 3 2- ) = 0.7:2:0.3:1:6:3, weigh 4.96g Ca(NO 3 ) 2 4H 2 O (0.021mol), 15.38g Mg(NO 3 ) 2 ·6H 2 O (0.060mol), 2.68g Zn(NO 3 ) 2 ·6H 2 O (0.009mol) and 11.25g Al(NO 3 ) 3 9H 2 O (0.030mol), put it into a 250mL Erlenmeyer flask, add 100mL deionized water to dissolve to obtain aqueous solution A; weigh 7.20g NaOH (0.180mol) and 9.54g NaOH 2 CO 3 (0.090mol), put it into another 250mL Erlenmeyer flask, add 75mL deionized water to dissolve to obtain aqueous solution B.

[0044] (2) Put the aqueous solution A and the aqueous solution B into two constant-pressure dropping funnels respectively, put 100mL deionized water into a 500mL four-neck flask, turn on the stirrer, and adjust the two constant-pressure dropping funn...

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Abstract

The invention relates to a solid catalyst preparation and bio-diesel synthesis technology, in particular relates to a bio-diesel catalyst, and specifically relates to a bio-diesel catalyst Ca-Mg-Zn-Al-O and a preparation method thereof. According to the technical scheme adopted by the invention, Ca-Mg-Zn-Al hydrotalcite is firstly prepared by a co-precipitation reaction of nitrate solutions of calcium, magnesium, zinc and aluminum, which are in a molar ratio of n (Ca):n(Mg):n(Zn):n(Al):n(O) of (0.3-0.7):2:(0.3-0.7):1:(4.1-4.9), a sodium hydroxide solution and a sodium carbonate solution; the Ca-Mg-Zn-Al-O solid base catalyst is obtained by roasting at a high temperature. By utilizing the advantages of Ca-Al-O solid base catalyst, Mg-Al-O solid base catalyst and Zn-Al-O solid base catalyst and avoiding defects of the solid base catalysts, the invention provides Ca-Mg-Zn-Al-O solid base as well as a preparation method and application thereof in catalyzing and synthesizing bio-diesel.

Description

technical field [0001] The invention relates to the technical field of solid catalyst preparation and biodiesel synthesis, in particular to a biodiesel catalyst, specifically a biodiesel catalyst Ca-Mg-Zn-Al-O and a preparation method thereof. Background technique [0002] Ca-Al-O, Mg-Al-O and Zn-Al-O composite oxides alone have been reported as biodiesel catalysts, and their catalytic activity order is: Ca-Al-O>Mg-Al-O>Zn -Al-O; the order of resistance to acid, water and saponification is: Zn-Al-O>Mg-Al-O>Ca-Al-O. From the two rankings, it can be seen that the Ca-Al-O catalyst has strong activity and fast catalytic reaction rate, but its ability to resist acid, water and saponification is poor, and it has strict requirements on raw materials; Zn-Al-O catalyst is resistant to acid, water and saponification. The ability to resist water and saponification is strong, and the requirements for raw materials are loose, but the activity is poor, and the catalytic react...

Claims

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Application Information

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IPC IPC(8): B01J23/06C10L1/02
CPCY02E50/13Y02E50/10
Inventor 靳福全赵金安李晓红李东红张颖
Owner TAIYUAN INST OF TECH
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