KR20060029671A - Selective catalytic adsorption purifying process for synthesizing high purity biodiesel from used fryer oil - Google Patents

Abstract

The present invention is a manufacturing method for synthesizing high-purity biodiesel which can replace crude oil refinery, which is the fuel of diesel engine, from waste fried oil or pure vegetable oil, and the conventional method washes crude biodiesel synthesized by a known method with water. Purity was improved by removing impurities, but this method discharged a large amount of wastewater and became a source of pollution. In this process, high purity biodiesel is synthesized without wastewater discharge by adding the powder composed of silica, alumina, or magnesia to crude biodiesel without using water, and filtering and removing the additives that selectively adsorb impurities. Environmental improvement and manufacturing cost reduction were achieved.

Waste oil, biodiesel, selective adsorption, silica, alumina, magnesia, additives

Description

               Selective Catalytic Adsorption Purifying Process for Synthesizing High Purity Biodiesel from Used Fryer Oil}

The technical field of the present invention is a known technique for synthesizing a fatty acid alcohol ester by transesterifying alcohols such as methanol or ethanol in the presence of a catalyst using waste fried oil and animal and vegetable oil as raw materials, and washing the synthesized crude biodiesel with water. It is a method of producing high-purity biodiesel by purifying by selective adsorption removal technology by additives without using.

The prior art has caused water pollution and increased treatment costs by removing impurities such as glycerin, fatty acids, soaps, etc., by adding water to the crude biodiesel produced by transesterification by a known method.

In the present invention, the methanol and the raw material oil are pumped by a reaction pump to add a catalyst to transesterify in a continuous reactor, the by-product glycerin is separated and discharged in the separator, and the excess methanol is evaporated in the evaporator, and then silica is purified in the refiner. Continuously produce high-purity biodiesel as a filtrate by selectively discharging impurities from decanta by selectively adsorbing impurities with additives composed of% ~ 80%, 1% ~ 30% alumina, 1% ~ 40% magnesia. As a manufacturing method, it does not discharge waste water by not washing with water, and it is a fully automatic process to purify the whole process, so that the synthesis process is carried out in high yield, and high purity biodiesel is produced by adsorbing impurities with a high-performance selective adsorbent. To achieve a high-efficiency economic manufacturing process.

1 is a selective catalytic adsorption and purification method for synthesizing high-purity biodiesel using waste fried oil.

(1) input tank (6) evaporator

(2) Reaction Pump (7) Purifier

(3) Catalytic charge machine (8) Decanta

(4) Continuous Reactor (9) Condenser

 (5) Separator (10) Recovery Tank

If described in detail by the accompanying drawings;

       1 is a manufacturing method of the biodiesel of the present invention, pure vegetable oil and pretreated waste fried oil are weighed in (1) raw material input tank, and methanol is pumped into (2) reaction pump (4) continuous reactor, In (1), the feed oil is injected into the discharge side of (2) through the control valve, and (3) the catalyst supplied through the catalyst injector is mixed vigorously like the feed oil and methanol to form a vortex to pass through (4). The reaction was completed, and (5) glycerin, a transesterification reaction by-product, was separated from the centrifuge and discharged to the bottom, and the produced biodiesel was discharged to the top and injected into the thin film distillation to evaporate residual methanol. (9) flow through condenser (10) into the recovery tank, discharge crude biodiesel to the bottom of (6), (7) stir in the purifier, silica 20% ~ 80%, alumina 1% ~ 30%, magnesia Supply additives composed of 1% to 40% The mixture is mixed to allow the impurities contained in the crude biodiesel to be selectively adsorbed to the additives. (8) The waste additive is separated from the centrifugal decanter, and the purified filtrate is produced as a filtrate.

1) High purity biodiesel can be produced by selectively adsorbing and removing impurities contained in crude biodiesel synthesized by a known technique with additives.

2) Purification without washing with water prevents waste water discharge and environmental pollution.

3) Synthesis reaction and purification process are completed in a consistent continuous process to produce high-purity biodiesel with high yield to improve economic efficiency.

Claims (1)

  The methanol and crude oil were pumped by the reaction pump to add a catalyst to transesterify in the continuous reactor, the by-product glycerin was separated and discharged in the separator, the excess methanol was evaporated in the evaporator, and the silica was purified from 20% to 80%. Continuous production process to produce high-purity biodiesel with high yield by separating and discharging waste additives from decanter by selectively adsorbing impurities with additives composed of 1% ~ 30% alumina and 1% ~ 40% magnesia .