阅读说明：本技术 一种基于二异丙醚的高浓度含酚废水萃取剂及萃取方法 (A kind of high-concentration phenolic wastewater extractant and extracting process based on diisopropyl ether ) 是由 杨思宇 曹琦 陈博坤 钱宇 于 2019-07-29 设计创作，主要内容包括：本发明属于污水处理技术领域,公开了一种基于二异丙醚的高浓度含酚废水萃取剂及萃取方法。所述萃取剂由体积分数为1％～99％的二异丙醚和体积分数为1％～99％的正戊醇组成。所述萃取方法为：利用所述萃取剂,对高浓含酚废水中多元酚进行多级逆流萃取,并通过汽提萃余相和精馏萃取相来回收萃取剂。相对于单一萃取剂二异丙醚,本发明的协同萃取剂对酚类物质特别是多元酚萃取效果显著。(The invention belongs to technical field of sewage, disclose a kind of high-concentration phenolic wastewater extractant and extracting process based on diisopropyl ether.The n-amyl alcohol that the diisopropyl ether and volume fraction that the extractant is 1%~99% by volume fraction are 1%~99% forms.The extracting process are as follows: utilize the extractant, multi-stage counter current extraction is carried out to polyphenol in highly concentrated phenol wastewater, and extractant is recycled by stripping raffinate phase and rectifying extraction phase.Relative to single extractant diisopropyl ether, synergic reagent of the invention is significant to phenolic substances especially polyphenol effect of extracting.)

1. a kind of high-concentration phenolic wastewater extractant based on diisopropyl ether, which is characterized in that by volume fraction be 1%~99% Diisopropyl ether and volume fraction be 1%~99% n-amyl alcohol form.

2. a kind of high-concentration phenolic wastewater extractant based on diisopropyl ether according to claim 1, which is characterized in that The volume fraction of the diisopropyl ether is 30%~50%；The volume fraction of the n-amyl alcohol is 50%~70%.

3. a kind of method extracted using extractant of any of claims 1 or 2 to high-concentration phenolic wastewater, feature are existed In including the following steps: to take the extractant to carry out multi-stage counter current extraction to high-concentration phenolic wastewater, obtain extraction phase and raffinate Phase.

4. the method that a kind of pair of high-concentration phenolic wastewater is extracted according to claim 3, which is characterized in that described highly concentrated The phenol content for spending phenol wastewater is 2000~10000mg/L.

5. the method that a kind of pair of high-concentration phenolic wastewater is extracted according to claim 3, which is characterized in that the extraction The volume ratio of agent and high-concentration phenolic wastewater is 1:2~7.

6. the method that a kind of pair of high-concentration phenolic wastewater is extracted according to claim 3, which is characterized in that the multistage Counter-current extraction carries out under neutral or acid condition.

7. the method that a kind of pair of high-concentration phenolic wastewater is extracted according to claim 3, which is characterized in that the multistage During counter-current extraction, mixing time is 15~90min, and time of repose is 15~120min.

8. the method that a kind of pair of high-concentration phenolic wastewater is extracted according to claim 3, which is characterized in that the multistage The temperature of counter-current extraction is 25 DEG C~70 DEG C.

9. the method that a kind of pair of high-concentration phenolic wastewater is extracted according to claim 3, which is characterized in that the multistage The series of counter-current extraction is 2~8 grades.

10. the method that a kind of pair of high-concentration phenolic wastewater is extracted according to claim 3, which is characterized in that use institute It states after extractant extracts high-concentration phenolic wastewater, obtains extraction phase and raffinate phase, extraction phase enters phenol tower rectifying separation Crude phenols and extractant, extractant after the recovery are recycled；Raffinate phase enters water tower stripping and recycles dissolution or entrainment in dilute phenol water A small amount of extractant, water purification be sent into biochemical treatment unit.

Technical field

The invention belongs to technical field of sewage, and in particular to a kind of high-concentration phenolic wastewater extraction based on diisopropyl ether Take agent and extracting process.

Background technique

Highly concentrated phenol wastewater is mainly derived from coal gasification, coal upgrading semi-coke, coal tar hydrogenating, coal low temperature distillation waited Journey.Certain factory's semi-coke wastewater COD total amount is 35000-40000mg/L, total phenol content 16000mg/L, wherein unit phenol content 6000mg/L or so, polyphenol content 10000mg/L or so.Phenolic substances is difficult to degrade, toxicity is big, and direct emission can be made to environment It is destroyed at great, and to the toxic effect of the microorganism of subsequent biochemical treatment process, reduces the biodegradability of waste water.To sum up, The high amount containing phenol of highly concentrated phenol wastewater and high pollution to environment and ecology, so that industrial multipair phenols therein at present Substance carries out resource utilization.

Solvent extraction is the main method of highly concentrated phenol wastewater resource utilization phenolic substances.Diisopropyl ether is current work A kind of extractant generally used in industry, solubility is small in water for the extractant, Yi Huishou and recycling energy consumption are small, but it is maximum Dephenolize low efficiency is disadvantageous in that, especially to polyphenol.Therefore it needs to develop a kind of novel extraction with high removal efficiency Agent.

Summary of the invention

In order to solve the disadvantage that existing extractant diisopropyl ether and deficiency, the primary purpose of the present invention is that providing a kind of base In the high-concentration phenolic wastewater extractant of diisopropyl ether.

The high-concentration phenolic wastewater extraction that another object of the present invention is to provide a kind of using above-mentioned based on diisopropyl ether The method that agent extracts high-concentration phenolic wastewater.

The purpose of the invention is achieved by the following technical solution:

A kind of high-concentration phenolic wastewater extractant based on diisopropyl ether, the diisopropyl for being 1%~99% by volume fraction The n-amyl alcohol that ether and volume fraction are 1%~99% forms.

Preferably, the volume fraction of the diisopropyl ether is 30%~50%.

Preferably, the volume fraction of the n-amyl alcohol is 50%~70%.

A method of high-concentration phenolic wastewater is extracted using above-mentioned extractant, is included the following steps:

It takes the extractant to carry out multi-stage counter current extraction to high-concentration phenolic wastewater, obtains extraction phase and raffinate phase.

Preferably, the phenol content of the high-concentration phenolic wastewater is 2000~10000mg/L.

Preferably, the source of the high-concentration phenolic wastewater is coal chemical industrial waste water containing phenol.

Preferably, the volume ratio of the extractant and high-concentration phenolic wastewater is 1:2~7.

Preferably, the multi-stage counter current extraction carries out under neutral or acid condition, more there is the item in pH=5~7 of choosing It is carried out under part.

Preferably, during the multi-stage counter current extraction, mixing time is 15~90min, time of repose 15 ~120min.

Preferably, the temperature of the multi-stage counter current extraction is 25 DEG C~70 DEG C.

Preferably, the series of the multi-stage counter current extraction is 2~8 grades.

Preferably, after extracting using the extractant to high-concentration phenolic wastewater, extraction phase and raffinate phase are obtained, is extracted It takes and mutually enters phenol tower rectifying separation crude phenols and extractant, extractant after the recovery is recycled；Raffinate phase enters water tower and strips back The a small amount of extractant for dissolving or carrying secretly in dilute phenol water is received, biochemical treatment unit is sent into water purification.

The principle of the present invention is as follows:

Synergic reagent is the mixed extractant of two or more extractant composition, and extraction yield is noticeably greater than independent Use the extraction yield of one of extractant.Polyphenol is because in waste water between polyphenol and hydrone compared with the extraction of unit phenol difficulty Hydrogen bond is stronger.The hydrogen bond between extractant and polyphenol is improved, the difficulty of extraction polyphenol can be reduced.Synergic solvent extraction of the invention In agent, receptor of the ether of main body extractant diisopropyl ether as hydrogen bond, donor of the hydroxyl of diluent n-amyl alcohol as hydrogen bond, The two forms intermolecular hydrogen bonding, is remarkably improved the effect of extracting to polyphenol.

The present invention compared with the existing technology, have following advantages and effects

(1) synergic reagent of the invention includes that the distribution all with higher of unit phenol and polyphenol is to phenolic substances Number, the especially de- polyphenol significant effect of dephenolization effect are better than single extractant diisopropyl ether.

(2) synergic reagent of the invention inherits the diisopropyl ether small feature of solubility in water, has lower molten Agent recycling energy consumption.

(3) synergic reagent optimal proportion of the invention are as follows: the volume fraction of diisopropyl ether is 30%~50%, n-amyl alcohol Volume fraction be 50%~70%.The optimal volume proportion range of the synergic reagent is wide, in actual industrial operation, operates bullet Property range is big, easily controllable.

Specific embodiment

Below with reference to embodiment, the present invention is described in further detail, however, the present invention is not limited thereto.

Phenol content in following embodiment measures by the following method:

Total phenol content is measured using HJ502-2009 bromination volumetric method (without pre-distillation)；Unit phenol content uses The measurement of HJ502-2009 after-distillation with bromine method.Polyphenol content using gas chromatography measure, chromatographic column be 30m × The DB-5MS capillary column of 0.32mm × 0.25 μm, detector are flame ionization ditector.Operating condition is as follows: sample injector Temperature is 270 DEG C, and detector temperature is 230 DEG C, and post case initial temperature is set as 110 DEG C, after keeping 2min, with 10 DEG C/min Rise to 160 DEG C.Carrier gas used is nitrogen, flow velocity 30ml/min.It is measured using inner mark method ration, internal standard compound is n-octyl alcohol.