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Method for processing sulfur-containing waste lye

A treatment method and technology for waste lye, applied in chemical instruments and methods, oxidized water/sewage treatment, chemical/physical processes, etc., can solve problems such as loss of phthalocyanine drill, achieve high activity, improve desulfurization effect, and prepare process simple effect

Inactive Publication Date: 2008-03-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The oxidative desulfurization catalyst phthalocyanine cobalt sulfonate prepared in CN1164592C is used as an oxidative desulfurization catalyst for removing organic sulfides and inorganic sulfides in sulfur-containing wastewater. The application method is to directly add phthalocyanine cobalt to sulfur-containing waste lye , this kind of traditional application method has the problem that phthalocyanine cobalt will be lost with the effluent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A certain volume of sulfur-containing waste lye is added to a tower reactor (with activated carbon-loaded cobalt phthalocyanine inside), and quantitative compressed air is blown into by an air compressor through a rotameter to carry out catalytic oxidation reaction at room temperature. Reaction temperature: normal temperature; air intake: 0.12m 3 h -1 ; Regular sampling and analysis of the residual sodium sulfide content in the waste caustic until the end of the reaction, to investigate the desulfurization effect. When the reaction time is 6h, the oxidative desulfurization rate of cobalt phthalocyanine supported on activated carbon can reach 99.8%.

Embodiment 2

[0031] This example illustrates the preparation method of the supported cobalt phthalocyanine sulfonate used in the catalyst of the present invention.

[0032] Take 1,080 grams of phthalic anhydride and 3,210 grams of 25% oleum, react at 180-190°C for 6 hours, then add calcium oxide to neutralize free sulfuric acid, and then add ammonia water to generate phthalic acid tetra Ammonium sulfonate. After separation to obtain the intermediate product, take 98 grams of the intermediate product, 80 grams of urea, and 17 grams of cobalt chloride, add them to 150 ml of sulfolane, add 1 ml of titanium tetrachloride as a catalyst, react at 190 ° C for 3.5 hours, filter The ammonium salt of phthalocyanine cobalt tetrasulfonate is obtained, and the product is dark blue-green powder after drying. Solvent reuse.

[0033] Prepare a saturated aqueous solution of cobalt phthalocyanine tetrasulfonate ammonium salt and impregnate with the ratio of phthalocyanine cobalt tetrasulfonate ammonium sa...

Embodiment 3

[0035] The preparation method of ammonium phthalocyanine cobalt tetrasulfonate is the same as in Example 2.

[0036] Prepare a saturated aqueous solution of cobalt phthalocyanine tetrasulfonate ammonium salt and impregnate the active carbon at a ratio of 1:300 (weight ratio) between phthalocyanine cobalt tetrasulfonate ammonium salt and dry at 130-200°C after impregnation.

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PUM

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Abstract

The invention relates to a processing method of sulfur containing waste alkali solution, which is in particular to a catalytic oxidation desulfurization method of the supported phthalocyanine cobalt. The sulfur containing waste alkali solution is processed by the method of the invention, which both avoids a second pollution caused by the direct discharging of the phthalocyanine cobalt into the water body, and improves the desulfurization effect of during the process of the sulfur containing waste alkali solution. The active carbon supported phthalocyanine cobalt has a higher catalytic oxidation activity, a simple process and a higher safety.

Description

technical field [0001] The invention relates to a treatment method for sulfur-containing waste caustic soda, a treatment method for catalytic oxidation, in particular to a method for catalytic oxidation desulfurization using supported cobalt phthalocyanine. Background technique [0002] In petrochemical production, alkali washing technology is widely used in various production processes, such as liquid hydrocarbon alkali refining process, gasoline alkali washing process, diesel oil alkali washing process and ethylene cracking gas alkali washing process. At present, the combined process of amine washing and alkali washing is mostly used at home and abroad to remove H in the cracked gas. 2 S, CO 2 , COS and other acid gases. The spent caustic liquor formed after the alkaline cleaning process contains high concentrations of sulfide and ammonia, as well as pollutants such as phenol, cyanide and oil. It has a strong stench and cannot be directly discharged into the sewage treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B01J23/75B01J35/10
Inventor 宁艳春蒲文晶张春李伊格吕利民
Owner PETROCHINA CO LTD
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