Solid acid catalyst for preparing biodiesel and preparation method thereof

A solid acid catalyst, biodiesel technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc. The problem of high water volume can achieve the effect of large ion exchange capacity, high catalytic activity and improved catalytic activity.

Inactive Publication Date: 2012-05-09
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex composition and high water content of industrial and catering waste oils, the commonly used catalysts have high requirements for impurities such as water, which makes the treatment process of raw materials complicated and costly. Therefore, it is imperative to develop new catalysts.

Method used

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  • Solid acid catalyst for preparing biodiesel and preparation method thereof
  • Solid acid catalyst for preparing biodiesel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Preparation of sulfonated phenylphosphonic acid. Will SO 3 Liquid (12.5cm 3 ) was slowly added into the round bottom flask containing phenylphosphoric acid (20g, 127mmol) and 1,2-dichloroethane (100ml) at a temperature of 0°C, the liquid gradually changed from colorless to yellow, and the round bottom flask was heated at 90 ℃ water bath and heated to reflux for 14 hours to obtain a two-phase liquid, the upper layer was colorless 1,2-dichloroethane, and the lower layer was yellow viscous crude product of sulfonated phenylphosphoric acid. Remove the supernatant 1,2-dichloroethane liquid, dissolve the resulting crude product in deionized water, add 15% BaCl 2 solution to remove excess sulfuric acid, centrifuge to remove BaSO 4 Precipitation, the filtrate was added to a cation exchange resin for ion exchange for 24 hours, and suction filtered. The obtained filtrate was concentrated by a rotary evaporator and then extracted repeatedly with ether until the extracted ether ...

Embodiment 2

[0056] Preparation method of sulfonated phenylphosphonic acid with different degrees of sulfonation. The preparation method of the sulfonated phenylphosphonic acid of different sulfonation degree is the same as embodiment 1, just increases SO 3 The dosage, raising reaction temperature, increasing reaction time etc. methods realizes. This allows the preparation of sulfonated phenylphosphonic acids with a degree of sulfonation greater than 100%. The degree of sulfonation is between 100% and 200%.

[0057] For example, when the dosage of phenylphosphonic acid is 20g, the liquid SO 3 The dosage is 35mL, the reaction temperature is 95°C, the reaction is 24h, and the sulfonated phenylphosphonic acid with a sulfonation degree of 200% can be obtained.

[0058] When the dosage of phenylphosphonic acid is 20g, the liquid SO 3 The dosage is 30mL, the reaction temperature is 90°C, and the reaction is 15h, and the sulfonated phenylphosphonic acid with a sulfonation degree of 170% can b...

Embodiment 3

[0060] Preparation of cerium sulfonated phenylphosphonate (CeSPP). Get ceric ammonium nitrate (10g, 18.24mmol) and add in the beaker, add 1mol L -1 nitric acid solution until completely dissolved. The dissolved solution was added to the solution of sulfonated phenylphosphonic acid (100% sulfonation degree) (4.5g, 18.24mmol), the solution immediately turned into a yellow emulsion, heated and stirred at 80°C for 12h and centrifuged, and the centrifuged The precipitate was washed repeatedly to remove the soluble acid therein to obtain a light yellow powder, which was dried to obtain a yellow CeSPP powder with a yield of about 72%. The degree of sulfonation is 100%.

[0061] The degree of sulfonation of the product is determined by the degree of sulfonation of the reaction raw material sulfonated phenylphosphonic acid, the sulfonated phenylphosphonic acid of which degree of sulfonation is used as raw material (DS=x), the sulfonated sulfonated phenylphosphonic acid cerium obtaine...

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Abstract

The invention belongs to the field of catalyst preparation, and relates to a solid acid catalyst for preparing biodiesel and a preparation method thereof. The solid acid catalyst is sulfonated cerium phenyl phosphinate, and the sulfonation degree is 100-200%. The preparation method comprises the following two steps: introducing SO3 into a mixed solution of phenylphosphonic acid and 1,2-dichloroethane, thus preparing sulfonated phenylphosphonic acid; and adding ammonium ceric nitrate completely dissolved in a nitric acid solution into the sulfonated phenylphosphonic acid solution, stirring while heating, centrifuging, repeatedly washing the precipitate, and drying. The catalyst is widely applicable to the reactant raw grease, can be easily recycled, and has the advantages of low requirements for water and other impurities in the raw material, moderate reaction, high catalytic activity and no pollution.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and relates to a solid acid catalyst for preparing biodiesel and a preparation method thereof. Background technique [0002] Diesel oil molecules are composed of about 15 carbon chains, while vegetable oils are composed of 14 to 18 carbon chains, which are similar to the number of carbons in diesel oil molecules. Biodiesel is a new type of fuel processed from oil (renewable vegetable oil, etc.). By chemical composition, biodiesel fuel is a high fatty acid methyl or ethyl ester. [0003] Compared with conventional diesel, biodiesel has the following advantages: [0004] (1) It has excellent environmental protection characteristics. The sulfur content in biodiesel is low, and the emission of sulfur dioxide and sulfide is low; the biodiesel does not contain aromatic hydrocarbons, and the exhaust gas has low damage to humans and the environment; About 10% less than that; biodiesel is biodegrad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06C11C3/10C10L1/02
CPCY02E50/13Y02E50/10
Inventor 李忠芳王素文
Owner SHANDONG UNIV OF TECH
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