Method for processing high-concentration dibutyl phthalate-containing organic waste water

A technology of dibutyl phthalate and organic waste water, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as rare reports and achieve resource recovery , the effect of reducing costs and reducing risks

Inactive Publication Date: 2016-02-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above patents introduce the treatment method for low-concentration dibutyl phthalate, but there are few reports on the treatment of organic wastewater containing high-concentration dibutyl phthalate

Method used

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  • Method for processing high-concentration dibutyl phthalate-containing organic waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0044] The organic wastewater containing high-concentration dibutyl phthalate used in this example is the concentrated wastewater produced in the separation and purification step in the process of preparing BDO in a chemical fiber factory. The water quality characteristics are: pH is 1.7, and the mass content of DBP is 73 %, the COD concentration is as high as 1190000mg / L.

[0045] The experimental procedure of this embodiment:

[0046] 1) Add sodium hydroxide solution to the organic wastewater containing high concentration of dibutyl phthalate, adjust its pH value to 11, stir for 0.5h, store it statically for 1h and separate layers, the upper layer is dibutyl phthalate The mass content of the ester is an oil phase of 85.4%, the lower layer is an aqueous phase solution with a mass content of 5.84% dibutyl phthalate and other organic matter, the COD of the lower aqueous phase solution is 920000mg / L, the upper oil phase and the lower water phase The volume ratio of the phase so...

Embodiment 2

[0050] The organic wastewater containing high-concentration dibutyl phthalate used in this example is the concentrated wastewater produced in the separation and purification step in the process of preparing BDO in a chemical fiber factory. The water quality characteristics are: pH is 1.8, and the mass content of DBP is 75. %, the COD concentration is as high as 1300000mg / L.

[0051] The experimental procedure of this embodiment:

[0052] 1) Add sodium hydroxide solution to the organic wastewater containing high concentration of dibutyl phthalate, adjust its pH value to 10.5, stir for 0.5h, store statically for 0.5h and separate layers, the upper layer is dibutyl phthalate The mass content of butyl ester is an oil phase of 81.6%, the lower layer is an aqueous phase solution with a mass content of 5.23% dibutyl phthalate and other organic matter, the COD of the lower aqueous phase solution is 1000000mg / L, the upper oil phase and the lower The volume ratio of the aqueous phase s...

Embodiment 3

[0056] The organic wastewater containing high-concentration dibutyl phthalate used in this example is the concentrated wastewater produced in the separation and purification step in the process of preparing BDO in a chemical fiber factory. The water quality characteristics are: pH is 1.5, and the mass content of DBP is 72 %, COD concentration is 1000000mg / L.

[0057] The experimental procedure of this embodiment:

[0058] 1) Add sodium hydroxide solution to the organic wastewater containing high concentration of dibutyl phthalate, adjust its pH value to 10.2, stir for 0.5h, store it statically for 1h and separate layers, the upper layer is dibutyl phthalate The mass content of the ester is an oil phase of 80.16%, the lower layer is an aqueous phase solution with a mass content of 4.24% dibutyl phthalate and other organic matter, the COD of the lower aqueous phase solution is 800000mg / L, the upper oil phase and the lower water phase The volume ratio of the phase solution is 5:...

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Abstract

The invention relates to the technical field of waste water processing, and concretely relates to a method for processing high-concentration dibutyl phthalate-containing organic waste water. The organic waste water processing method comprises the following steps: adjusting pH value to alkalescence, fully stirring the waste water, dividing the waste water into an upper layer dibutyl phthalate-containing oil phase and a lower layer water phase solution containing dibutyl phthalate and other organic matters, separating the upper layer oil phase for recovering dibutyl phthalate, and using a hydrogen peroxide-wet type oxidation method for oxidation treatment on the lower layer water phase solution, wherein the COD clearance of the processed lower layer water phase solution is 65-80%, mass content of dibutyl phthalate is 0.01-0.55%, so that harmlessness processing can be reached. The organic waste water processing method can fully realize resource recycling and reduces energy consumption required by waste water treatment.

Description

technical field [0001] The invention relates to industrial wastewater treatment technology, in particular to a treatment method for organic wastewater containing high-concentration dibutyl phthalate. Especially refers to the recycling and harmless treatment method of organic wastewater containing high concentration of dibutyl phthalate produced in the process of preparing 1,4-butanediol by maleic anhydride hydrogenation method in a chemical fiber factory. Background technique [0002] 1,4-Butanediol (BDO) is an important organic chemical raw material and plays a pivotal role in the petrochemical industry. BDO can not only be used in the production of tetrahydrofuran, γ-butyrolactone, polydibutyl terephthalate, polyurethane artificial leather, polyurethane elastomer and polyurethane sole rubber, but also in the production of plasticizers and curing agents, etc., with a wide range of uses . At present, the commonly used BDO production process is maleic anhydride hydrogenatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/34
Inventor 邱松李昕阳魏令勇万国晖
Owner CHINA PETROLEUM & CHEM CORP
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