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Method for extracting panaplate from mother solution or waste water of dipterex

A technology for trichlorfon and dichlorvos, which is applied in the field of dichlorvos production and trichlorvos production wastewater treatment field, can solve the problems of high salt content in wastewater and unfavorable subsequent treatment, and achieves the effects of high purity, environmental protection, and low investment in equipment.

Inactive Publication Date: 2010-07-21
NANTONG VOCATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the salt content in the wastewater is high, which is unfavorable for subsequent treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Salt out 1L of production waste water with refined trichlorfon, containing 3.6% of trichlorfon, COD 156396mg / L; add 250mg of aluminum sulfate, adjust the pH value to 6.5 with NaOH, stir with air for 2 hours, and precipitate and separate to obtain orange-yellow oil 24ml of dichlorvos contains 75.12% of dichlorvos; the COD of wastewater after treatment is 68436mg / L, containing 0.021% of trichlorfon.

example 2

[0017] Use refined trichlorfon to salt out 1L of production wastewater, containing 5.5% of trichlorfon; add 250mg of aluminum sulfate, adjust the pH value to 9.0 with NaOH, and stir with air for 2 hours, precipitate and separate to obtain 42ml of brown oily dichlorvos, containing 70.89% of dichlorvos %; Wastewater COD is 67413mg / L, containing trichlorfon 0.015%.

example 3

[0019] Use refined trichlorfon to salt out 1L of production wastewater, containing 7.5% of trichlorfon, and COD is 226812mg / L; add 250mg of aluminum sulfate, adjust the pH value to 8.5 with NaOH, and stir with air for 2 hours, and the precipitate is separated to obtain brown oily 58ml of dichlorvos contains 75.34% of dichlorvos; the COD of wastewater after treatment is 69274mg / L, containing 0.021% of trichlorfon.

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PUM

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Abstract

The invention discloses a method for extracting panaplate from mother solution or waste water of dipterex. The method comprises the following steps: adjusting the PH value of the mother solution or waste water of dipterex to 6-10 by alkali, then adding emulsion splitter, inflating air and churning for 1 to 2 hours to separate the Panaplate by deposition. The alkali refers to sodium hydroxide or sodium hydroxide solution. The raw material is mother solution or waste water of dipterex. One or a mixture of the aluminium sulphate, aluminium chloride and poly aluminum chloride can be used as the emulsion splitter. The invention can be used to the separation of Panaplate in the Panaplate production and the pre-treatment of dipterex waste water. The method of the invention is simple in technology, convenient in operation and cheap in equipment investment. With the method, the separated Panaplate is of higher purity and better environmental protection.

Description

technical field [0001] The invention belongs to the field of dichlorvos production and wastewater treatment of trichlorfon production, in particular a method for separating dichlorvos from trichlorfon production mother liquor or wastewater, which is mainly applied to the separation of dichlorvos in dichlorvos production and the pretreatment of trichlorfon production wastewater . Background technique [0002] Both dichlorvos and trichlorfon are high-efficiency poisoning pesticides. These two species have been produced and used in my country for more than 40 years. With the rapid development of green agriculture, the pollution of highly toxic and highly residual pesticides to the environment has been widely concerned by people. In addition, the use of highly toxic and highly residual pesticides such as methamidophos has been banned in various places. The proportion of demand for new types of public hazard pesticides continues to rise, and the proportion of demand for common p...

Claims

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Application Information

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IPC IPC(8): C02F1/66C02F1/52C07F9/113C02F101/34C02F101/36C02F101/38C02F103/36
Inventor 解彦刚蔡凤黄徽何晓春丁邦琴周君
Owner NANTONG VOCATIONAL COLLEGE
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