Soybean oil alkali clay deacidifying process:
The existence of free fatty acid in soybean oil affects the oil flavor, edible safety and storage stability, and the traditional acid method has its limitations, a new acid method are mostly in the laboratory research stage.Adsorption acid has the advantages of simple operation, low energy consumption, low pollution, is a hotspot of current research.This team after years of research to cheap bentonite as raw material, made a solid alkali adsorbent - alkali clay.
The adsorbent has a large capacity of absorption, and acid effect is good wait for an advantage, but the existence of solid-liquid separation is difficult problem, but did not see the comparison with the traditional acid alkali refining process and dynamics research.Palm oil mill (http://www.palmmill.com) is based on the above work.Considering acid effect and the filtering performance, it is concluded that soybean oil (AV = 2.02) optimum process conditions of acid as: alkaline clay alkali content of 33.3%, moisture content is 11%, adding amount is 3%;Appropriate USES temperature programmed temperature, the adsorption 100 min at room temperature, heating up to 75 ℃ heat preservation under 10 min, while hot filtering.
Alkaline clay acid activated clay and decoloring process (http://www.palmmill.com/News/130.html)coupling, can simplify the process, reduce the energy consumption and coupling order: first add 3% alkali clay adsorption 90 min at room temperature, plus 2% dry activated clay, up to 75 ℃ heat reaction 10 min, strike filter.Laboratory simulation traditional intermittent alkali refining acid and alkaline clay adsorption acid, it is concluded that the two methods can satisfy the basic requirement of acid, but the adsorption of acid and alkali refining acid compared with obvious advantages, each batch of oil processing time shorten 10 h, acid value, meet the requirements of the refined oil yield increased by 3.3%, every tons of refined soybean oil yield...