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Processing method of wastewater of acrylonitrile production refining process

A technology for wastewater treatment and acrylonitrile, which is applied in natural water treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of complex treatment process and high operating cost, and achieve simple process and low operating cost. , remove the effect completely

Active Publication Date: 2013-12-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the prior art, when treating the waste water of the acrylonitrile production and refining system, the treatment process is complex and the operation cost is high, and a new method for treating the waste water in the acrylonitrile production and refining process is provided

Method used

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  • Processing method of wastewater of acrylonitrile production refining process
  • Processing method of wastewater of acrylonitrile production refining process

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Effect test

Embodiment 1

[0016] RuCl containing 1.5 g of ruthenium 3 and PdCl with 0.5 g of palladium 2 Dissolve in 30ml distilled water to make a solution , the solution Add dropwise to 98 g of TiO with constant stirring 2 In the carrier, the catalyst precursor is prepared ; Catalyst precursor Dry at 100°C for 12 hours and calcined at 600°C for 5 hours to obtain catalyst precursor II; catalyst precursor II was reduced with excess hydrazine hydrate and dried at 120°C for 12 hours to obtain catalyst Pd 0.5 Ru 1.5 (TiO 2 ) 98 .

[0017] The waste water from the acrylonitrile production and refining system is mixed with the gas containing elemental oxygen and passed through the wet oxidation reactor. The reaction conditions are shown in Table 1. After the reaction, the waste water is cooled to room temperature by a cooler and separated from the gas and liquid. The COD value of the waste water before the reaction and the value after the reaction are analyzed. See Table 2 for the COD value of ...

Embodiment 2～9

[0020] The preparation process of the catalyst is the same as in Example 1, except that different amounts or types of precious metals and supports and different preparation conditions are used. The specific composition is shown in Table 1. The catalyst activity evaluation results are shown in Table 2.

[0021]

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Abstract

The invention relates to a processing method of wastewater of an acrylonitrile production refining process. The processing of the wastewater of an acrylonitrile production refining system has the problems of complex processing technology and high operation cost. Through use of a technical scheme of the processing method of the wastewater of the acrylonitrile production refining process, the problems are well solved, and the processing method can be used for processing of the wastewater of the acrylonitrile production refining process. The technical scheme is shown as follows: the wastewater produced in the acrylonitrile refining process of the acrylonitrile production by ammoxidation of propylene and propane is mixed with an element-oxygen-containing gas to pass through a wet oxidation reactor to remove organic matters in the wastewater to enable the COD value of the wastewater to be less than 500 mg / L.

Description

technical field [0001] The invention relates to a wastewater treatment method in the production and refining process of acrylonitrile. Background technique [0002] Acrylonitrile is an important organic chemical raw material, which is generally produced by the ammoxidation method of propylene or propane. Propylene or propane, ammonia and oxygen pass through the catalyst in the fluidized bed reactor to generate acrylonitrile and by-products such as acetonitrile and hydrocyanic acid. Then enter the recovery and refining system from the fluidized bed reactor to separate and purify acrylonitrile and by-products (USP3936360). [0003] Two types of wastewater are produced during the production of acrylonitrile, among which the COD value of the wastewater produced during the refining process is 10-50 g / l. Most of the wastewater in the refining system is concentrated by multi-effect evaporation at present, and the evaporated low-concentration wastewater is further reduced by stripp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F103/36
Inventor 宋卫林吴粮华汪国军姚全明
Owner CHINA PETROLEUM & CHEM CORP
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