Decolorizing and dewaxing process for vegetable oil with one-step method

Abstract

The invention provides a technology which can finish decolorization and dewaxing of vegetable oil within one step. The technology is described as following: after being heated, the vegetable oil needed to be treated is mixed with argil and active carbon; the mixture is sent into a decolorization tower for absorption; the materials after being absorbed then is sent into a deacidification tower for re-absorption; the materials after being re-absorbed then is pumped into a crystallizer for crystallization; the materials after being crystallized then is sent into a separator to separate the vegetable oil. The technology finishes decolorization and dewaxing treatment within one step. The materials after being decolorized directly enter into the decolorization tower without separating, with the result that the intermediate links between the decolorization and the dewaxing processes are reduced. The technology saves the equipment input and steam, power and manpower consumption necessary during the separation process, avoids the loss of the vegetable oil produced by the separation, has good decolorization and dewaxing effects, can recycle the argil and the active carbon when dewaxing, does not need to add filter acid any more, saves consumption costs of the filter acid, and greatly reduces the production cost of the vegetable oil.

Description

technical field [0001] The invention provides a process in vegetable oil production, especially a decolorization and dewaxing process. Background technique [0002] In the process of vegetable oil production, it is necessary to decolorize and dewax the neutralized and dried vegetable oil to improve the quality of vegetable oil. The current decolorization and dewaxing treatments are carried out separately, that is, firstly, clay and activated carbon are used as decolorizing agents for decolorization, and then the clay and activated carbon are separated from the decolorized vegetable oil. Add diatomaceous earth and perlite as filter aids to the decolorized vegetable oil from which white clay and activated carbon have been separated to carry out dewaxing, and finally separate the dewaxed vegetable oil from the filter aids. This process procedure is complex, after two separation processes. During the separation process after decolorization, because part of the vegetable oil is...

AI Technical Summary

Problems solved by technology

This process is complex, after two separation processes

In the separation process after decolorization, because part of the vegetable oil is mixed in clay and activated carbon, it will cause about 0.3-0.5% loss of vegetable oil

Moreover, this separation process requires a large amount of steam, electric energy, and labor consumption, which increases the production cost.