CN103420875A - CLT acid production method - Google Patents
CLT acid production method Download PDFInfo
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- CN103420875A CN103420875A CN2012101525900A CN201210152590A CN103420875A CN 103420875 A CN103420875 A CN 103420875A CN 2012101525900 A CN2012101525900 A CN 2012101525900A CN 201210152590 A CN201210152590 A CN 201210152590A CN 103420875 A CN103420875 A CN 103420875A
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- reaction
- chloro
- acid
- production method
- nitrotoluene
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Abstract
The invention relates to a CLT acid production method, and relates to a chemical synthesis method and especially a technical field of pigment intermediate synthesis. According to the invention, a palladium-carbon catalyst is selected to participate in a reaction, and can be circulated. The Pa/C catalyst has low requirement on the purity of a raw material 6-chloro-3-nitrotoluene-4-sulfonic acid. The method provided by the invention has the advantages of mild reaction, low reaction pressure, low reaction temperature, no solvent in a material reaction process, and easy control upon a hydrogenation reduction process. With the method, the yield is up to 96.3%.
Description
Technical field
The present invention relates to chemical synthesis process, particularly the synthesis technical field of Pigment Intermediates.
Background technology
CLT acid has another name called the chloro-3-phenylmethylamine of 6--4-sulfonic acid, mainly for the manufacture of bright red color lake C, Lithol Red 2G, is widely used in preparation printing ink etc.This Pigment Intermediates is mainly for the manufacture of bronze red C, the bright red isochrome variable pigments of the bright red LG of rubber and plastics.
Summary of the invention
The object of the invention is to propose a kind ofly to be beneficial to that industrialization is produced continuously, the chloro-3-phenylmethylamine of oligosaprobic reduction 6--4-sulfonic acid is produced the production method of CLT acid.
Technical solution of the present invention is: Pa/C catalyzer, amine promotor, the chloro-3-nitrotoluene of 6--4-sulfonic acid are dropped into to reactor, stirring reaction under the 0.8Mpa pressure condition; After reaction finishes, after material is lowered the temperature naturally, blowing; Again after press filtration, acid out, drying, dry to obtain product.
Separately, the mass ratio of the chloro-3-nitrotoluene of Pa/C catalyzer of the present invention, amine promotor and 6--4-sulfonic acid is 1 ︰ 8 ︰ 1500.
The present invention chooses palladium-carbon catalyst (Pa/C) and participates in reaction, can recycle.The Pa/C catalyzer is not high to the purity requirement of the chloro-3-nitrotoluene of raw material 6--4-sulfonic acid; Reaction process gentleness of the present invention, reaction pressure is low, and temperature of reaction is low, and the material reaction process, without solvent, is easy to the control in the hydrogenating reduction process, and yield is up to 96.3%.
Embodiment
One, CLT acid industrialization reaction process:
Catalyzer, amine promotor, the chloro-3-nitrotoluene of 6--4-sulfonic acid are dropped into to reactor according to mass ratio 1:8:1500 to be reacted.Reaction is cooled to 30～40 ℃ by material after finishing, and after press filtration, after acid out, drying, dries to obtain product, and yield is up to 96.3%.
Two, product performance:
Outward appearance: white or blush pressed powder
Content: (total amino value): >=98.0
Moisture :≤1.0%
Ash content :≤1.0%
Dissolving situation in ammoniacal liquor: limpid be clear to almost limpid transparent.
Claims (2)
1. the method that CLT acid is produced, is characterized in that: Pa/C catalyzer, amine promotor, the chloro-3-nitrotoluene of 6--4-sulfonic acid are dropped into to reactor, stirring reaction under the 0.8Mpa pressure condition; After reaction finishes, after material is lowered the temperature naturally, blowing; Again after press filtration, acid out, drying, dry to obtain product.
2. according to the production method of the required CLT acid of claim 1, while it is characterized in that feeding intake, the mass ratio of the chloro-3-nitrotoluene of described Pa/C catalyzer, amine promotor and 6--4-sulfonic acid is 1 ︰ 8 ︰ 1500.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101525900A CN103420875A (en) | 2012-05-17 | 2012-05-17 | CLT acid production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101525900A CN103420875A (en) | 2012-05-17 | 2012-05-17 | CLT acid production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103420875A true CN103420875A (en) | 2013-12-04 |
Family
ID=49646307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101525900A Pending CN103420875A (en) | 2012-05-17 | 2012-05-17 | CLT acid production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103420875A (en) |
-
2012
- 2012-05-17 CN CN2012101525900A patent/CN103420875A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131204 |