CN105154221A

CN105154221A - Efficient grease decoloring method

Info

Publication number: CN105154221A
Application number: CN201510462225.3A
Authority: CN
Inventors: 黄何
Original assignee: Chongzhou Baitouganquan Commercial Grease Factory
Current assignee: Chongzhou Baitouganquan Commercial Grease Factory
Priority date: 2015-07-31
Filing date: 2015-07-31
Publication date: 2015-12-16

Abstract

The invention belongs to the field of grease extraction, and concretely discloses an efficient grease decoloring method. The method comprises performing vacuum drying on degummed alkali-refined crude oil and controlling the vacuum degree to be 0.01-0.03 MPa, after drying is finished, sending the degummed alkali-refined crude oil into a first-grade decoloring tower, heating to 90-100 DEG C, adding activated clay accounting for 3%-6% by weight of the oil, reacting for 15-30 min at a rotation speed of 150-200 r/min, then sending into a second-grade decoloring tower, heating to 100-105 DEG C, then adding attapulgite accounting for 0.15%-0.6% by weight of the oil, reacting for 20-35 min at a rotation speed of 180-200 r/min, and then filtering, so as to obtain decolored grease. The decoloring effect is improved by 10% or more compared with a method of singly using activated clay, grease waste caused by single usage of activated clay is avoided, oil yield of grease is increased, usage of the two grades of decoloring towers enables the technology to be relatively precise and the decoloring effect to be enhanced.

Description

A kind of grease-decolor method efficiently

Technical field

The invention belongs to grease and refine field, particularly a kind of grease-decolor method efficiently.

Background technology

Traditional oil and fat refining operation mainly comprises: come unstuck, alkali refining, decolouring, deodorization four-stage.Wherein, to come unstuck and decolouring is two very important processes, to the quality of refining oil and quality influence maximum.In crude oil, colors has two large classes usually: one is called natural pigments.Another kind is called non-natural pigment, the pigment of normally organic substance decomposing product formation, a gang of in reddish-brown and sorrel.Just because of the existence of colors in crude oil, make its color comparatively dark and muddy, decoloration process thus must be adopted to make it become clear, this is also obtain one of indispensable key of high-quality processed oil.

The discoloring agent that crude oil decoloration process adopts is generally atlapulgite, in use, usually at an established temperature this atlapulgite is added in crude oil according to oil plant kind, refining requirement, the grease color depth etc. in different ratios, atlapulgite starts adsorpting pigment material in crude oil, after for some time, through pressure filtration, crude oil is separated with the atlapulgite having adsorbed pigment, so, the colors in crude oil, colloidalmaterial, residual soap etc. just can be separated with crude oil with atlapulgite.It should be noted, the used in amounts of atlapulgite wants strict control in process of production, if consumption very little, decolorizing effect is not obvious, cannot touch the mark; If carclazyte consumption is too much, although colors in crude oil can be removed more thorough, but a large amount of atlapulgites also can have certain adsorption to crude oil.Have experiment to find, in the atlapulgite after decolouring, oleaginousness can reach 20 ~ 40%.Pertinent literature is separately had also once to report; if the addition of atlapulgite is too high; the acid value of the crude oil after decolouring and peroxide value can be made to increase; and the immersion of meeting metal ion usually; improve the oxidizing reaction of crude oil, accelerate the color reversion of crude oil, more bad is; use too much atlapulgite that crude oil also can be made to catch the carclazyte taste of overrich, this brings unnecessary trouble to the follow-up deodorizing technology of crude oil.

Summary of the invention

The present invention, for overcoming above-mentioned difficulties, proposes a kind of grease-decolor method efficiently.

Technical scheme of the present invention is as follows:

A kind of grease-decolor method efficiently, its process comprises:

First the alkali refining crude oil that will come unstuck carries out vacuum-drying, vacuum tightness is 0.01-0.03MPa, the alkali refining crude oil that will come unstuck again after drying terminates is sent in one-level bleaching tower, be heated to 90-100 DEG C, add the atlapulgite of the heavy 3%-6% of oil, react 15-30min under the rotating speed of 150-200r/min after, send into two-level decolour tower, be heated to 100-105 DEG C, again add the attapulgite of the heavy 0.15%-0.6% of oil, under 180-200r/min rotating speed, react 20-35min, then filter obtained decolouring grease; The mass ratio 10:1-20:1 of described atlapulgite and attapulgite.

As preferably, described one-level bleaching tower is heated to 95-100 DEG C.

Beneficial effect of the present invention:

One, adopt two kinds of discoloring agent atlapulgites and attapulgite, make decolorizing effect improve more than 10% than single use atlapulgite;

Two, avoid the waste that single use atlapulgite causes grease, add the oil yield of grease;

Three, adopt two-stage bleaching tower, make technique more accurate, decolorizing effect strengthens.

Embodiment

Be described in further detail below by specific embodiment.

Embodiment 1

A kind of grease-decolor method efficiently, its process comprises:

First the alkali refining crude oil that will come unstuck carries out vacuum-drying, vacuum tightness is 0.01MPa, the alkali refining crude oil that will come unstuck again after drying terminates is sent in one-level bleaching tower, be heated to 90 DEG C, add the atlapulgite that oil weighs 3%, react 15min under the rotating speed of 150r/min after, send into two-level decolour tower, be heated to 100 DEG C, again add the attapulgite that oil weighs 0.15%, under 180r/min rotating speed, react 20min, then filter obtained decolouring grease.

Embodiment 2

A kind of grease-decolor method efficiently, its process comprises:

First the alkali refining crude oil that will come unstuck carries out vacuum-drying, vacuum tightness is 0.02MPa, the alkali refining crude oil that will come unstuck again after drying terminates is sent in one-level bleaching tower, be heated to 95 DEG C, add the atlapulgite that oil weighs 4%, react 20min under the rotating speed of 180r/min after, send into two-level decolour tower, be heated to 103 DEG C, again add the attapulgite that oil weighs 0.3%, under 190r/min rotating speed, react 25min, then filter obtained decolouring grease.

Embodiment 3

A kind of grease-decolor method efficiently, its process comprises:

First the alkali refining crude oil that will come unstuck carries out vacuum-drying, vacuum tightness is 0.03MPa, the alkali refining crude oil that will come unstuck again after drying terminates is sent in one-level bleaching tower, be heated to 98 DEG C, add the atlapulgite that oil weighs 5%, react 29min under the rotating speed of 170r/min after, send into two-level decolour tower, be heated to 105 DEG C, again add the attapulgite that oil weighs 0.5%, under 200r/min rotating speed, react 30min, then filter obtained decolouring grease.

Embodiment 4

A kind of grease-decolor method efficiently, its process comprises:

First the alkali refining crude oil that will come unstuck carries out vacuum-drying, vacuum tightness is 0.03MPa, the alkali refining crude oil that will come unstuck again after drying terminates is sent in one-level bleaching tower, be heated to 100 DEG C, add the atlapulgite that oil weighs 6%, react 30min under the rotating speed of 200r/min after, send into two-level decolour tower, be heated to 105 DEG C, again add the attapulgite that oil weighs 0.6%, under 200r/min rotating speed, react 35min, then filter obtained decolouring grease.

Although with reference to explanatory embodiment of the present invention, invention has been described here, above-described embodiment is only the present invention's preferably embodiment, embodiments of the present invention are not restricted to the described embodiments, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.

Claims

1. an efficient grease-decolor method, is characterized in that: its process comprises:

2. the efficient grease-decolor method of one according to claim 1, is characterized in that: described one-level bleaching tower is heated to 95-100 DEG C.