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Method for extracting phosphate ester from alga mud by using dimethyl ether

A technology of phosphate ester and dimethyl ether, applied in the field of resources and environment, can solve problems such as no document disclosure, and achieve the effects of improving energy utilization efficiency, saving costs, and being easy to separate

Inactive Publication Date: 2020-08-21
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But about adopting DME to extract the method for phosphorus from algal mud, there is no literature yet.

Method used

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  • Method for extracting phosphate ester from alga mud by using dimethyl ether
  • Method for extracting phosphate ester from alga mud by using dimethyl ether
  • Method for extracting phosphate ester from alga mud by using dimethyl ether

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Effect test

Embodiment 7

[0033] Embodiment 7 reaction temperature Investigation on Extraction Rate of Phosphate Ester

[0034] Polarity is the key to determining solubility, because Phosphates are polar organic compounds , according to the principle of like dissolves like, need to adjust DME is a polar solvent, and the larger the dielectric constant, the stronger the polarity, and vice versa, the smaller the dielectric constant, the smaller the polarity.

[0035] Dielectric constant between 0-5: non-polar

[0036] Dielectric constant in 5-30: medium (or semi-polar)

[0037] Dielectric constant > 30: strong polarity

[0038]The inventors assessed the parameters (relative dielectric constant of DME) that affect the extraction rate of phosphate esters at different temperatures, as shown in Table 2. It can be seen that as the temperature increases, the dielectric constant decreases, and the extraction rate of phosphate esters decreases. (Phosphate extraction rate in DME: H 2 O mass ratio is mea...

Embodiment 8

[0042] figure 2 It is a schematic diagram of the connection relationship of the devices adopted in the present invention. like figure 2 As shown, the output pipeline of the DME gas tank 1 is connected to the liquid DME temporary storage tank 5 through the flow regulating valve 2; the output pipeline of the liquid DME temporary storage tank 5 passes through the storage tank outlet valve 6, the reactor inlet valve 7 and the reactor 8 in sequence Input pipeline links to each other; The output pipeline of reactor 8 links to each other with the input pipeline of gas-liquid separation tank 11 by pressure regulating valve 10; The first output pipeline of gas-liquid separation tank 11 exports the liquid that is rich in phosphoric acid ester through liquid flow valve 12, can A further step is to extract the phosphorus element in it.

[0043] The second output pipeline of the gas-liquid separation tank 11 is connected to the input pipeline of the drying tank 15 through the gas flow ...

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Abstract

The invention relates to a method for extracting phosphate ester from alga mud by using dimethyl ether. The method comprises the following steps: putting alga mud formed after blue algae are fished into a reaction kettle, converting DME into a liquid state by using an air compression pump, and dissolving phosphate ester by adjusting the reaction parameters of the reaction kettle and adjusting thepolarity of DME to be consistent with that of phosphate ester; carrying out solid-liquid separation on the obtained mixture, wherein the obtained solid phase is dehydrated alga mud, the water contentis reduced to 40%, and the subsequent landfill incineration requirement is met; and separating the obtained liquid-phase product, converting the liquid DME into gaseous DME through normal-temperaturepressure reduction, collecting the gaseous DME for reuse, enabling the residual liquid-phase product to be rich in phosphate ester, and further extracting the phosphorus element so as to achieve the purposes of reduction and resource utilization of the alga mud.

Description

technical field [0001] The invention belongs to the field of resources and environment, and in particular relates to a method for extracting phosphorus by utilizing the dissolving properties of dimethyl ether (DME) to organic matter to dissolve phosphate in algae mud. Background technique [0002] Cyanobacteria is an aquatic organism, divided into four types: Basketballalgae; Oscillatoriasp; Nostoc; Seaweed. When the lake water is severely polluted by organic matter, and the nitrogen and phosphorus content exceeds the standard, resulting in heavy eutrophication, and when the temperature is suitable (the temperature is around 18°C), blue-green algae may explode. Cyanobacteria are actually green in color, and a large number of floating algae cover the water surface like a layer of sticky "green paint". Experts have given it a beautiful name-cyanobacteria bloom. When blue-green algae burst, the dissolved oxygen in the water is consumed by blue-green algae, and other aquatic or...

Claims

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Application Information

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IPC IPC(8): C07F9/10C02F11/00C02F11/147B01D11/00
CPCB01D11/00C02F11/00C02F2303/06C07F9/103C02F11/147
Inventor 朱伟李卓王辰宇牟彪陈乐陈思鹏
Owner HOHAI UNIV
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