CN104412978A - Preparation method of metaldehyde - Google Patents
Preparation method of metaldehyde Download PDFInfo
- Publication number
- CN104412978A CN104412978A CN201310387426.2A CN201310387426A CN104412978A CN 104412978 A CN104412978 A CN 104412978A CN 201310387426 A CN201310387426 A CN 201310387426A CN 104412978 A CN104412978 A CN 104412978A
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- CN
- China
- Prior art keywords
- methaldehyde
- metaldehyde
- dehydration
- preparation
- distillation dehydration
- 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.)
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Abstract
The invention relates to a preparation method of metaldehyde. The preparation method comprises the following steps: I. preparing metaldehyde by mixing an organic solvent with a wet product of metaldehyde, and carrying out distillation dehydration; II. carrying out distillation dehydration through jet heating or film evaporator heating with a solvent as a carrier, and enabling a dehydration procedure and wet grinding, mixing and packaging procedures to be operated continuously.
Description
Technical field
The invention belongs to chemical technology field, be specifically related to a kind of outfit method of the methaldehyde.
Background technology
Methaldehyde sterling is white powder, industrial goods are canescence or pale yellow powder, there is rotten-egg odour, be insoluble in water, be insoluble to most of organic solvent, but can be dissolved in pyridine, to light, heat, moist instability, easily decomposite carbon disulphide, chance alkaline matter or the material such as copper, mercury all easily decompose releases carbon disulphide and subtracts effect, and volatility is little.So-called protection, exactly for plant provides Zn element, except solving the symptom of scarce zinc, strengthens the ability of opposing disease, thus relatively plays bactericidal action to plant.
Summary of the invention
The present invention proposes a kind of outfit method of the methaldehyde, and bactericidal range of the present invention extensively, not easily produces resistance, and control efficiency is obviously better than other same series bactericidal agents.Technical scheme is: with the method for the methaldehyde, and step is:
The first step, methaldehyde preparation adopts the wet Product mix distillation dehydration of organic solvent and the methaldehyde.
Second step take solvent as carrier through spraying heating or through kestner long-tube evaporator heating distillation dehydration, can make dehydration procedure and wet pulverizing, modulation, packaging process continued operation.
Solvent method dewatering speed of the present invention is fast, and production safety efficiency is high, and simplifies production technology.
Embodiment:
The outfit method of the methaldehyde, step is:
The first step, methaldehyde preparation adopts the wet Product mix distillation dehydration of organic solvent and the methaldehyde.
Second step take solvent as carrier through spraying heating or through kestner long-tube evaporator heating distillation dehydration, can make dehydration procedure and wet pulverizing, modulation, packaging process continued operation.
Claims (1)
1. the outfit method of the methaldehyde, its characterization step is:
The first step, methaldehyde preparation adopts the wet Product mix distillation dehydration of organic solvent and the methaldehyde,
Second step take solvent as carrier through spraying heating or through kestner long-tube evaporator heating distillation dehydration, can make dehydration procedure and wet pulverizing, modulation, packaging process continued operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310387426.2A CN104412978A (en) | 2013-08-30 | 2013-08-30 | Preparation method of metaldehyde |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310387426.2A CN104412978A (en) | 2013-08-30 | 2013-08-30 | Preparation method of metaldehyde |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104412978A true CN104412978A (en) | 2015-03-18 |
Family
ID=52963911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310387426.2A Pending CN104412978A (en) | 2013-08-30 | 2013-08-30 | Preparation method of metaldehyde |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104412978A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105505042A (en) * | 2015-12-31 | 2016-04-20 | 辛范范 | Improved exterior wall paint and preparation method thereof |
-
2013
- 2013-08-30 CN CN201310387426.2A patent/CN104412978A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105505042A (en) * | 2015-12-31 | 2016-04-20 | 辛范范 | Improved exterior wall paint and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150318 |
|
| WD01 | Invention patent application deemed withdrawn after publication |