CN102633593A - Refined chloroprene polymerization inhibitor preparation method - Google Patents
Refined chloroprene polymerization inhibitor preparation method Download PDFInfo
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- CN102633593A CN102633593A CN2012100798718A CN201210079871A CN102633593A CN 102633593 A CN102633593 A CN 102633593A CN 2012100798718 A CN2012100798718 A CN 2012100798718A CN 201210079871 A CN201210079871 A CN 201210079871A CN 102633593 A CN102633593 A CN 102633593A
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- chloroprene
- stopper
- polymerization inhibitor
- refined
- preparation
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Abstract
The invention relates to a chloroprene preparation method, in particular to a refined chloroprene polymerization inhibitor preparation method in a chloroprene synthesis production process, which solves the problem that polymerization inhibitor prepared by low-purity chloroprene blocks a flow meter in the traditional technology. The refined chloroprene polymerization inhibitor preparation method includes: dissolving the polymerization inhibitor consisting of nitrosodiphenylamine and phenothiazine at the temperature of -10 DEG C by using chloroprene (refined chloroprene after rectification) liquid with the purity not lower than 99%, and then mechanically stirring for 2 hours. The proportion of the polymerization inhibitor to the chloroprene is 3-9:100. Production tests discover that effects are obvious, and blockage of the flow meter by the polymerization inhibitor is obviously reduced.
Description
Technical field
The present invention relates to a kind of chloroprene technology of preparing, be specially the smart chloroprene stopper compound method in a kind of synthetic chloroprene Production Flow Chart.
Background technology
Utilizing acetylene to prepare in the flow process of chloroprene, stopper needs in the continuous adding system aborning, and how to improve the stable and continuous that the stopper compound method is beneficial to stopper and add, be the key of guaranteeing security of system and quality balance property.Need the process point of adding stopper more in the production process of preparation chloroprene; The content of keeping stopper in the system need adopt the under meter metering to add stopper continuously, but often occurs stopper obstruction under meter in the liquid process because stopper is mixed with.At least latch up phenomenon occurs in average per 24 hours, and had a strong impact on the carrying out of production.
Summary of the invention
The present invention provides a kind of smart chloroprene stopper compound method for solving the problem of the stopper obstruction under meter that chloroprene is prepared in the conventional art.
The present invention is realized by following technical scheme; A kind of smart chloroprene stopper compound method; Through adopting purity is to be not less than 99% chloroprene (through smart chloroprene after the rectifying) liquid dissolve nitrosodiphenylamine and thiodiphenylamine composition under temperature-10 ℃ environment stopper, passes through mechanical stirring and gets final product in 2 hours.The ratio of stopper and chloroprene is 3-9:100.
Find that through production test effect is obvious, stopper under meter stopping state obviously reduces.A latch up phenomenon appears at most a middle of the month.
Table 1 experimental temperature is-10 ℃, adopts rotating speed to stir 120min for the 120r/min magnetic stirrer, and solute (nitrosodiphenylamine and thiodiphenylamine) carries out proportioning according to mass ratio 2:1.
Table 1
Compare with conventional art; The present invention prepares stopper under the lower condition of temperature; Keep the CL of having realized stopper under the deliquescent prerequisite of stopper, and can in the long time, not produce deposition, solving the difficult problem of stopper frequent jams under meter basically.
Embodiment
Embodiment 1, a kind of chloroprene stopper compound method are that 99% chloroprene (through after the rectifying) liquid dissolve 2 gram nitrosodiphenylamines and 1 and restrains thiodiphenylamine under temperature-10 ℃ environment through adopting 100 gram purity, and the process mechanical stirring got final product in 2 hours.
Embodiment 2, a kind of chloroprene stopper compound method are that 99.5% chloroprene (through after the rectifying) liquid dissolve 4 gram nitrosodiphenylamines and 2 and restrains thiodiphenylamine under temperature-10 ℃ environment through adopting 100 gram purity, and the process mechanical stirring got final product in 2 hours.
Embodiment 3, a kind of chloroprene stopper compound method are that 99.9% chloroprene (through after the rectifying) liquid dissolve 6 gram nitrosodiphenylamines and 3 and restrains thiodiphenylamine under temperature-10 ℃ environment through adopting 100 gram purity, and the process mechanical stirring got final product in 2 hours.
Embodiment 4, a kind of chloroprene stopper compound method are that 80% chloroprene (through after the rectifying) liquid dissolve 4 gram nitrosodiphenylamines and 2 and restrains thiodiphenylamine under temperature-10 ℃ environment through adopting 100 gram purity, and the process mechanical stirring got final product in 2 hours.
Above-mentioned four kinds of embodiment to deter the effect of gathering as shown in table 2.
Table 2
Claims (3)
1. chloroprene stopper compound method is characterized in that through adopting purity be to be not less than 99% chloroprene liquid under temperature-10 ℃ environment, to dissolve stopper, passes through mechanical stirring and gets final product in 2 hours.
2. chloroprene stopper compound method according to claim 1, the ratio that it is characterized in that stopper and chloroprene is 3-9:100.
3. chloroprene stopper compound method according to claim 1 and 2 is characterized in that stopper is that nitrosodiphenylamine and thiodiphenylamine are formed according to mass ratio 2:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100798718A CN102633593A (en) | 2012-03-23 | 2012-03-23 | Refined chloroprene polymerization inhibitor preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100798718A CN102633593A (en) | 2012-03-23 | 2012-03-23 | Refined chloroprene polymerization inhibitor preparation method |
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| Publication Number | Publication Date |
|---|---|
| CN102633593A true CN102633593A (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100798718A Pending CN102633593A (en) | 2012-03-23 | 2012-03-23 | Refined chloroprene polymerization inhibitor preparation method |
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| CN (1) | CN102633593A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3015677A (en) * | 1959-01-31 | 1962-01-02 | Knapsack Ag | Process for the stabilization of chloroprene |
| CN1697796A (en) * | 2004-05-26 | 2005-11-16 | 三菱化学株式会社 | Polymerization inhibitor, composition containing the same and process for producing easily polymerizable compound with the polymerization inhibitor |
-
2012
- 2012-03-23 CN CN2012100798718A patent/CN102633593A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3015677A (en) * | 1959-01-31 | 1962-01-02 | Knapsack Ag | Process for the stabilization of chloroprene |
| CN1697796A (en) * | 2004-05-26 | 2005-11-16 | 三菱化学株式会社 | Polymerization inhibitor, composition containing the same and process for producing easily polymerizable compound with the polymerization inhibitor |
Non-Patent Citations (2)
| Title |
|---|
| 四川省化学研究所三室: "氯丁二烯高效阻聚剂的研究", 《合成橡胶工业》 * |
| 庞义: "氯丁二烯温和阻聚剂的研究", 《山西化工》 * |
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Application publication date: 20120815 |