Preparation method of pesticide solvent replacing petroleum aromatic hydrocarbon solvent

A technology of aromatic solvents and pesticides, applied in the field of preparation of pesticide solvents, can solve the problems of processing, storage and transportation, aggravating the shortage of oil resources, unfavorable resource utilization, etc., to ensure social and food safety, strong wettability and permeability , Improve the effect of the drug effect

Active Publication Date: 2011-12-28
河北德大新材料股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of petroleum aromatics as pesticide solvents has the following disadvantages: (1) petroleum aromatics are strong carcinogens and the largest cause of aplastic anemia and fetal congenital defects; (2) petroleum aromatics are flammable and explosive Dangerous chemicals, with low flash point and explosive concentration, are very dangerous in the process of processing, storage and transportation of pesticide preparations; (3) Petroleum aromatics are important petrochemical products, which are widely used as pesticide solvents, which not only aggravate the shortage of petroleum resources , and cause great pollution to the ecological environment
However, vegetable oil comes from green plants, and a large amount of vegetable oil will inevitably compete with food, and it is not conducive to the full utilization of resources.

Method used

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  • Preparation method of pesticide solvent replacing petroleum aromatic hydrocarbon solvent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Filtration: It is carried out using conventional filtering equipment and processes known in the industry. Recover the waste oil, remove the solid impurities, mechanical suspended matter and part of the peptized substances contained in the waste oil.

[0044] (2) Acidification: Put the filtered waste oil and concentrated sulfuric acid with a mass concentration of 98% into the reaction vessel according to the mass ratio of 1:1, stir, heat to 105°C, and keep it warm for 1 hour, then stop stirring and let stand 1.5h, release the lower layer of acid solution, wash the upper layer of fat with water to a pH value of 4~5, heat to 250°C under a vacuum of 60mmHg and stir for 1h for dehydration.

[0045] (3) Esterification: Put the fatty matter and n-octanol treated in step (2) into the reaction kettle at a weight ratio of 6:1, then add concentrated sulfuric acid with a mass concentration of 98%, and heat under stirring Reflux for 15 hours, then distill off the n-octanol and ...

Embodiment 2

[0053] (1) Filtering: Instance 1 at the same time.

[0054] (2) Acidification: Put the filtered waste oil and concentrated sulfuric acid with a mass concentration of 80% into the reaction vessel according to the mass ratio of 1:8, stir and heat to 80°C, keep it warm for 3 hours, and then let it stand for 1 hour. Release the acid solution in the lower layer, wash the fat in the upper layer with water to a pH value of 4~5, heat to 120°C under a vacuum of 55 mmHg and stir for 3 hours for dehydration.

[0055] (3) Esterification: Put the fatty matter and n-octanol treated in step (2) into the reaction kettle at a weight ratio of 8:1, then add concentrated sulfuric acid with a mass concentration of 98%, and heat under stirring Reflux for 12 hours, then distill off the n-octanol, stop heating at 110°C to obtain the initial ester of the fatty substance, and the mass of the concentrated sulfuric acid is 5% of the total mass of the above-mentioned fatty substance and n-octanol.

[005...

Embodiment 3

[0063] (1) Filtering: Instance 1 at the same time.

[0064] (2) Acidification: Put the filtered waste oil and concentrated sulfuric acid with a mass concentration of 98% into the reaction vessel at a mass ratio of 9:1, stir, heat to 120°C, keep warm for 0.5h, and then stand for 3h , release the acid solution in the lower layer, wash the fatty matter in the upper layer with water to a pH value of 4~5, heat to 290~300°C under a vacuum of 55mmHg and stir for 0.5h for dehydration.

[0065] (3) Esterification: Put the fat and n-octanol after the treatment in step (2) into the reaction kettle at a weight ratio of 10:1, then add concentrated sulfuric acid with a mass concentration of 98%, and heat under stirring Reflux for 16 hours, then distill off the n-octanol, stop heating at 110°C to obtain the initial ester of the fatty substance, and the mass of the concentrated sulfuric acid is 3% of the total mass of the above-mentioned fatty substance and n-octanol.

[0066] (4) Deacidific...

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Abstract

The invention discloses a preparation method of a pesticide preparation for replacing a petroleum aromatic solvent. The pesticide preparation is prepared by using drainage oil as raw material, carrying out filtering, acidifying, esterification, depickling and underpressure distillation, and letting methyl oleate or isooctyl oleate, N-methyl pyrrolidone or cyclohexanone and stabilizing agent be subject to complex reaction. The method can not only greatly reduce the application of drainage oil in food processing by lawbreaking traders to guarantee the food safety and security of society, but also can save a large amount of petroleum resource. The pesticide preparation prepared by the method has high flash point and low volatilization rate, so that the pesticide preparation has better safetyof production and storage transportation than the light aromatic solvent, and is safety in use and has low toxicity to human body and environment. The pesticide preparation has low volatility, strongwetting and permeability and high expansibility, so that the pesticide preparation is helpful for play a pharmacodynamics when being used in a plurality of herbicides and pesticides.

Description

technical field [0001] The invention relates to a pesticide solvent, in particular to a method for preparing a pesticide solvent capable of replacing petroleum aromatic solvents prepared from recovered waste oil. Background technique [0002] Among the widely used pesticide solvents, the most widely used are petroleum aromatic hydrocarbon solvents with benzene homologues (toluene, xylene, etc.) as additives. The use of petroleum aromatics as pesticide solvents has the following disadvantages: (1) petroleum aromatics are strong carcinogens and the largest cause of aplastic anemia and fetal congenital defects; (2) petroleum aromatics are flammable and explosive Dangerous chemicals, with low flash point and explosive concentration, are very dangerous in the process of processing, storage and transportation of pesticide preparations; (3) Petroleum aromatics are important petrochemical products, which are widely used as pesticide solvents, which not only aggravate the shortage o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/02A01N25/04A01N25/06A01N43/60A01P13/00C11B3/00C11B3/04C11C3/04
Inventor 张家滔范晓清李立孔
Owner 河北德大新材料股份有限公司
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