Preparation method and application of ammonium N-alkyl dithiocarbamate and water aqua thereof

An alkyl dithioamino, ammonium formate technology, applied in the application, herbicides and algaecides, weed elimination equipment and other directions, can solve the problems of single variety, soil compaction and other problems, achieve convenient preparation, obvious effect, The effect of good application prospects

Inactive Publication Date: 2020-10-30
济南锐铂化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the existing soil fumigant has a single variety and the use of metamac all the year round in some areas is likely to cause soil compaction, the present invention provides a preparation method and application of a soil fumigant N-alkylammonium dithiocarbamate , N-Alkyl ammonium dithiocarbamate water agent has good stability, high preparation yield, cheap and easy-to-obtain raw materials, and does not contain alkali metal ions, and does not damage the aggregate structure of the soil. It can be used as a soil fumigant to replace metabam , easy to apply, and the principle of action is the same as that of metabam. The product of the present invention can effectively improve the soil compaction caused by the perennial use of metabam

Method used

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  • Preparation method and application of ammonium N-alkyl dithiocarbamate and water aqua thereof
  • Preparation method and application of ammonium N-alkyl dithiocarbamate and water aqua thereof
  • Preparation method and application of ammonium N-alkyl dithiocarbamate and water aqua thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]1000 ml reaction bottle, add 68.5 grams of water, add 100 grams of 40% monomethylamine, 176 grams of 25% ammonia water, control the temperature at 25-30 ° C, slowly add 100 grams of 97% carbon disulfide dropwise under airtight conditions, drop after 2 hours, add dropwise After the completion, the temperature was controlled at 25-30° C., and the stirring reaction was continued for 1 hour to obtain 436 grams of N-methyl ammonium dithiocarbamate aqueous preparation, with a content of 35.4% and a yield of 98.1%. Reaction formula:

[0040] .

Embodiment 2

[0042] 1000 ml reaction bottle, add 136 grams of water, add 83 grams of 70% monoethylamine, 176 grams of 25% ammonia water, control the temperature at 25-30 ° C, slowly add 100 grams of 97% carbon disulfide dropwise under airtight conditions, drop after 2 hours, add dropwise After completion, control the temperature at 25-30°C, continue stirring and reacting for 1 hour, and obtain 485 grams of N-ethylammonium dithiocarbamate aqueous preparation, with a content of 35.5% and a yield of 98.0%; the reaction formula:

[0043] .

Embodiment 3

[0044] Embodiment 3 (one-step method prepares N-isopropyl ammonium dithiocarbamate aqueous solution)

[0045] 1000 ml reaction bottle, add 191 grams of water, add 76 grams of 99% isopropylamine, 176 grams of 25% ammonia water, control the temperature at 25-30 ° C, slowly add 100 grams of 97% carbon disulfide dropwise under airtight conditions, and drop it in 2 hours. Control the temperature at 25-30°C, continue to stir and react for 1 hour to obtain 533 grams of N-isopropylammonium dithiocarbamate aqueous solution, with a content of 35.5% and a yield of 98.2%; the reaction formula:

[0046] .

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Abstract

The invention provides a preparation method and application of ammonium N-alkyl dithiocarbamate and water aqua thereof. The structural formula of the ammonium N-alkyl dithiocarbamate is shown in the specification. The preparation method of the water aqua product is any one of the following method 1: a) dropwise adding carbon disulfide into a monoalkylamine aqueous solution, and continuously reacting after dropwise adding to obtain an N-alkyl dithiocarbamic acid aqueous solution, and (b) dropwise adding ammonia water into the N-alkyl ammonium dithiocarbamate aqueous solution obtained in the step (a), and stirring for reaction to obtain an N-alkyl ammonium dithiocarbamate aqueous solution, and the method 2: mixing water, ammonia water and monoalkylamine, dropwise adding carbon disulfide, andobtaining the N-alkyl ammonium dithiocarbamate water aqua after the reaction is finished. The product disclosed by the invention is applied to soil fumigation and disinfection treatment, has obviousweeding and root-knot nematode killing properties, replaces metham, and can effectively improve the soil hardening phenomenon.

Description

technical field [0001] The invention belongs to the field of chemical pesticides, and in particular relates to a preparation method and application of N-alkyl ammonium dithiocarbamate and an aqueous solution thereof. Background technique [0002] Soil fumigants can effectively prevent and control diseases transmitted in soil. Methyl bromide, which was commonly used in the past, was banned in 2015 due to its damage to the ozone layer. At present, chloropicrin, melonon and metabam occupy the main market of domestic soil fumigants. However, chloropicrin is a highly toxic pesticide, which should also be phased out and banned in 2022 according to the newly promulgated "Pesticide Management Regulations" in 2017. In the future, it will mainly rely on the soil fumigant market of Mimelong and Metame, the varieties are relatively single, and Mimeme is granular, so it is not as convenient as the water dilution of Metame for irrigation. In many places, Metabam has been used for 5-10 y...

Claims

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Application Information

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IPC IPC(8): C07C333/16A01N47/14A01P5/00A01P3/00A01P1/00A01P7/04A01P13/00A01B79/00A01B79/02A01M21/04
CPCA01B79/00A01B79/02A01M21/043A01N47/14C07C333/14C07C333/16
Inventor 武昭华武子龙周东方
Owner 济南锐铂化工有限公司
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