반응 #70142

반응 방정식

dimethyl dithiophosphoric acid

diethyl maleate

dimethyl dithiophosphoric acid

diethyl maleate

Hydroquinone

→

malathion

반응 조건

후처리

1. 1
   기타separate solutions
2. 2
   workup.ADDITIONan organic solution of diethyl maleate and an aqueous solution of dimethyl dithiophosphoric acid, was mixed for about 8 hours at 53° C. under a nitrogen atmosphere
3. 3
   workup.ADDITIONAfter mixing
4. 4
   기타the organic and aqueous solutions were separated
5. 5
   세척was washed two (2) times with water (approximately 1 liter each time)
6. 6
   기타The organic and aqueous solutions were separated

실험 절차

The solution of dimethyl dithiophosphoric acid was added to diethyl maleate (the ratio of dimethyl dithiophosphoric acid to diethyl maleate was approximately 1-1.25 kg:1.2 kg). Hydroquinone (approximately 3 grams) was added to the mixture. The reaction mixture which contains two separate solutions, an organic solution of diethyl maleate and an aqueous solution of dimethyl dithiophosphoric acid, was mixed for about 8 hours at 53° C. under a nitrogen atmosphere. After mixing, the reaction was cooled to ambient temperature and the organic and aqueous solutions were separated. The organic or diethyl maleate solutions which contained malathion was washed two (2) times with water (approximately 1 liter each time). The organic and aqueous solutions were separated and the malathion in the solution of diethyl maleate retained. This reaction yielded approximately 1.5-1.9 kg of malathion.

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