CN107353259A - A kind of production technology of dazomet - Google Patents
A kind of production technology of dazomet Download PDFInfo
- Publication number
- CN107353259A CN107353259A CN201710788987.1A CN201710788987A CN107353259A CN 107353259 A CN107353259 A CN 107353259A CN 201710788987 A CN201710788987 A CN 201710788987A CN 107353259 A CN107353259 A CN 107353259A
- Authority
- CN
- China
- Prior art keywords
- dazomet
- production technology
- aminodithioformic acid
- stirring
- reaction temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D285/00—Heterocyclic compounds containing rings having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by groups C07D275/00 - C07D283/00
- C07D285/15—Six-membered rings
- C07D285/16—Thiadiazines; Hydrogenated thiadiazines
- C07D285/34—1,3,5-Thiadiazines; Hydrogenated 1,3,5-thiadiazines
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to a kind of production technology of dazomet, using methylamine, carbon disulfide as raw material synthetic intermediate N-methyl aminodithioformic acid, dazomet is then reacted to obtain with formaldehyde, its step is as follows：（1）It is stirred after methylamine is diluted with water into salt oven, carbon disulfide and controlling reaction temperature is added dropwise, continue stirring a period of time after dripping, is stopped stirring stratification and separate oil reservoir, produce N-methyl aminodithioformic acid；（2）Step is put into cyclization kettle（1）The N of gained-methyl aminodithioformic acid and zinc powder, stirring is opened, and cooled, formalin, and controlling reaction temperature is then added dropwise, drips rear insulation reaction and carries out suction strainer for a period of time, centrifuged, drying dazomet.The advantage of the invention is that：Using the production technology, energy resource consumption is small, and significant loss is small, small to pollution caused by environment, and production cost also correspondingly reduces.
Description
Technical field
The invention belongs to do agrochemicals field, more particularly to a kind of production technology of dazomet.
Background technology
Soil fumigant, thiocarbimide methyl esters class nematicide, and it is simultaneous control fungi, subterranean pest-insect and weeds, also known as
Must speed go out.The product decompose generation methylamine ylmethyl dithiocarbamate in soil, and further generate isothiocyanic acid first
Ester.Nematode and soil fungi, such as da mping-off fungi, silk core germ, sickle-like bacteria can effectively be prevented and treated, moreover it is possible to suppress many weeds lifes
It is long.Dazomet has preferable prevention effect to cotton yellow droop.
But the technique of this reagent is produced in the market, there is many drawbacks, it is necessary to put into special installation to add
Work dazomet raw material, energy resource consumption is big, and produces substantial amounts of stink damp, also results in the loss of raw material and the pollution of environment, production
Cost also correspondingly increases.
The content of the invention
The technical problem to be solved in the present invention is to provide one kind to pollute small, the production technology of the low dazomet of production cost.
In order to solve the above technical problems, the technical scheme is that：A kind of production technology of dazomet, its innovative point exist
In：A kind of production technology of dazomet, using methylamine, carbon disulfide as raw material synthetic intermediate N-methyl aminodithioformic acid,
Then dazomet is reacted to obtain with formaldehyde, its step is as follows：
（1）It is stirred after methylamine is diluted with water into salt oven, carbon disulfide is added dropwise and controls
Reaction temperature processed, continue stirring a period of time after dripping, stop stirring stratification and separate oil reservoir, produce N-first
Base aminodithioformic acid；
（2）Step is put into cyclization kettle（1）The N of gained-methyl aminodithioformic acid and zinc powder, stirring is opened, and dropped
Temperature, formalin, and controlling reaction temperature is then added dropwise, drips rear insulation reaction and carry out suction strainer for a period of time, centrifuge, drying
Produce dazomet.
The present invention, active compound product content is set to bring up to more than 98%.
The reaction equation of above-mentioned steps is as follows：
。
Further, the step（1）And step（2）Controlling reaction temperature between 20 ± 5 DEG C.
Further, the step（2）Suction strainer waste water squeeze into waste water station processing.
The advantage of the invention is that：Using the production technology, energy resource consumption is small, and significant loss is small, to dirty caused by environment
Contaminate small, production cost also correspondingly reduces.
Brief description of the drawings
Fig. 1 is the process flow diagram of dazomet production.
Fig. 2 is that mode figure is added dropwise in carbon disulfide.
Embodiment
The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this
It is bright to be limited among described scope of embodiments.
A kind of production technology of dazomet, using methylamine, carbon disulfide as raw material synthetic intermediate N-methyl dithiocarbamates
Formic acid, dazomet is then reacted to obtain with formaldehyde, its step is as follows：
1st, into the synthesis of saline solution
Into throwing water in salt oven：2000Kg, monomethyl amine 250Kg, chuck enter salt solution and are cooled to 20 DEG C.Start to be added dropwise in head tank
Two sulphur carbon ﹝ carbon disulfide hydraulic pressure to head tank ﹞, temperature control is at 25 DEG C during dropwise addition.About 6-7 hours drip.It is added dropwise
Terminate insulation reaction about 8 hours, measuring pH ≈ 7 with test paper arrives terminal.Stop stirring, stand 30 minutes and be layered, upper strata aqueous phase is transferred to
Next step reaction is carried out in cyclization kettle, lower floor's oil phase is mainly superfluous carbon disulfide, is put into storage tank；
2nd, the synthesis of dazomet
Input is a collection of into saline solution in cyclization kettle, zinc powder 5Kg, opens stirring, and cool.It is molten that 37% formaldehyde is squeezed into out of formaldehyde storage tank
Liquid is to formaldehyde measuring tank.Formaldehyde 320Kg, about 2.5 hours or so time is added dropwise in 25 DEG C.Drip insulation reaction one hour
Suction strainer groove is put into, water filtration to wastewater disposal basin, squeezes into waste water station processing.Dazomet, about 500Kg are obtained after centrifugation, drying.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The skill of the industry
For art personnel it should be appreciated that the present invention is not limited to the above embodiments, described in above-described embodiment and specification is explanation
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.
Claims (3)
1. a kind of production technology of dazomet, it is characterised in that using methylamine, carbon disulfide as raw material synthetic intermediate N-methyl
Aminodithioformic acid, dazomet is then reacted to obtain with formaldehyde, its step is as follows：
（1）It is stirred after methylamine is diluted with water into salt oven, carbon disulfide and controlling reaction temperature is added dropwise, drips follow-up
Continuous stirring a period of time, stop stirring stratification and separate oil reservoir, produce N-methyl aminodithioformic acid；
（2）Step is put into cyclization kettle（1）The N of gained-methyl aminodithioformic acid and zinc powder, stirring is opened, and dropped
Temperature, formalin, and controlling reaction temperature is then added dropwise, drips rear insulation reaction and carry out suction strainer for a period of time, centrifuge, drying
Produce dazomet.
2. the production technology of dazomet according to claim 1, it is characterised in that：The step（1）And step（2）Control
Reaction temperature is between 20 ± 5 DEG C.
3. the production technology of dazomet according to claim 1, it is characterised in that：The step（2）The waste water of suction strainer beat
Enter waste water station processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710788987.1A CN107353259A (en) | 2017-09-05 | 2017-09-05 | A kind of production technology of dazomet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710788987.1A CN107353259A (en) | 2017-09-05 | 2017-09-05 | A kind of production technology of dazomet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107353259A true CN107353259A (en) | 2017-11-17 |
Family
ID=60290725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710788987.1A Pending CN107353259A (en) | 2017-09-05 | 2017-09-05 | A kind of production technology of dazomet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107353259A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2838389A (en) * | 1952-09-03 | 1958-06-10 | Union Carbide Corp | Method of combatting weeds |
| CN1074442A (en) * | 1991-12-21 | 1993-07-21 | Basf公司 | Substantially there is not dust tetrahydrochysene-3,5-dimethyl-1,3, the preparation of 5-thiadiazine-2-thione granules |
| CN1543787A (en) * | 2003-11-20 | 2004-11-10 | 上海交通大学 | Process for preparing dazomet dustless stable fine granule |
-
2017
- 2017-09-05 CN CN201710788987.1A patent/CN107353259A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2838389A (en) * | 1952-09-03 | 1958-06-10 | Union Carbide Corp | Method of combatting weeds |
| CN1074442A (en) * | 1991-12-21 | 1993-07-21 | Basf公司 | Substantially there is not dust tetrahydrochysene-3,5-dimethyl-1,3, the preparation of 5-thiadiazine-2-thione granules |
| CN1543787A (en) * | 2003-11-20 | 2004-11-10 | 上海交通大学 | Process for preparing dazomet dustless stable fine granule |
Non-Patent Citations (1)
| Title |
|---|
| 曹坳程: "溴甲烷及其替代产品", 《农药》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NZ602637A (en) | Paper making processes and system using enzyme and cationic coagulant combination | |
| CN103772532B (en) | Method for processing skim rubber | |
| CN107353259A (en) | A kind of production technology of dazomet | |
| CN104179063A (en) | Processing method of biodegradable waterproof paper | |
| CN203460495U (en) | Honeycomb paperboard gluing circulation system | |
| CN204338099U (en) | A kind of auxiliary material uniform spraying device for food blending machine | |
| CN104893822A (en) | Extraction method of bone oil by using benzene | |
| CN208692235U (en) | A kind of fermentor for thick broad-bean sauce production | |
| CN203990037U (en) | A kind of for starch glue stirring dome-type filter | |
| CN205040636U (en) | Lactating sows mixed feed fermenting installation | |
| CN204939491U (en) | A kind of saccharification apparatus preparing β-amylose with cracking rice | |
| CN102060277A (en) | Production method of selenium sulfide | |
| CN208949231U (en) | Guarantee the peony seed oil rectification systems for the treatment of effect | |
| CN206215222U (en) | A kind of modern chemical industry material reaction kettle with manual governing function | |
| CN104557736A (en) | Purification method of sulfadoxine | |
| CN105001084A (en) | New synthetic method of Cisatracurium Besilate intermediate 1,5amylidene diacrylate | |
| CN203999543U (en) | The modified wetting mechanism of a kind of vegetable seed | |
| CN203112801U (en) | Yellow water pit dripping device | |
| CN205008183U (en) | Release paper spreading machine | |
| CN109206999A (en) | A kind of timber Diamond Search coating | |
| CN204281631U (en) | A kind of double-deck coating device for release and release control fertilizer | |
| CN203874499U (en) | Crab shell extraction device | |
| CN212199064U (en) | Benzene hydrogenation energy-saving efficiency improving device | |
| CN205269116U (en) | Extraction device of ethyl vanillin | |
| CN107930864A (en) | A kind of calcium sulfate dewatering centrifuge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171117 |
|
| WD01 | Invention patent application deemed withdrawn after publication |