Microwave wiped film type molecular distiller with thin film evaporator function and method for generating fatty acid methyl ester by distiller

Abstract

The invention discloses a microwave wiped film type molecular distiller with a thin film evaporator function and a method for generating fatty acid methyl ester by the microwave wiped film type molecular distiller, and belongs to the technical field of a chemical production process. The microwave wiped film type molecular distiller has the thin film evaporator function and a wiped film type molecular distillation function. Furthermore, a microwave auxiliary separation system is additionally arranged on the base of reserving heating by an oil heater, so that the separation effect is improved; volatile low-molecule materials can be separated. The method for generating the fatty acid methyl ester by the microwave wiped film type molecular distiller comprises the following steps: adding methyl alcohol and a base catalyst into vegetable oil; after alcoholysis, separating in the microwave wiped film type molecular distiller, so as to obtain the fatty acid methyl ester. The method provided by the invention has the relatively high alcoholysis efficiency; the cost of the production process can be reduced; the microwave wiped film type molecular distiller is used for further separating to obtain the fatty acid methyl ester, and has the advantages of simple method and resource and time saving.

Description

technical field [0001] The invention relates to a microwave wiped-film molecular still with the function of a thin-film evaporator and a method for producing fatty acid methyl ester by using the same, belonging to the technical field of chemical production technology. Background technique [0002] According to the different catalysts used, transesterification can be divided into base-catalyzed transesterification, acid-catalyzed transesterification and biocatalyzed transesterification. Among them, basic catalysts include NaOH, KOH, carbonate, sodium and potassium alkoxides, and organic bases; commonly used acidic catalysts are sulfuric acid, phosphoric acid or hydrochloric acid; biocatalytic transesterification uses various lipases as catalysts . At present, in the production of fatty acid methyl esters, alkalis, acids, solid acids, solid bases, ionic liquids, etc. are generally used as catalysts. [0003] The transesterification rate of fatty acid methyl ester prepared b...

AI Technical Summary

Problems solved by technology

Although the chemical method has such a high yield, the preparation of fatty acid methyl esters by chemical methods has the following disadvantages: chemical methods generally use refined vegetable oils as raw materials; quality; the reaction temperature is high and the process is complex; the excess methanol used in the reaction process needs to be removed by a one-stage or even multi-stage thin-film evaporator first, the treatment process is complicated and the energy consumption is high; the water and free fatty acids in the oil raw materials will seriously Affects the yield and quality of fatty acid methyl ester; product purification is complex, esterification products are difficult to recover, and the use of acid-base catalysts will generate a large amount of waste water and waste alkali (acid) liquid, and its discharge will easily cause secondary pollution to the environment, etc.

[0004] However, the chemical method has a simple production process and is easy to implement. If the above problems can be effectively solved, the chemical method may well be a suitable method.

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