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Preparation method of environment-friendly pigment yellow 151

A kind of pigment yellow, environment-friendly technology, applied in the preparation of pigment yellow 151 prepared by reacting with water bath heating in the preparation of intermediates, the preparation field of environment-friendly pigment yellow 151, can solve the support that cannot be differentiated, poor support stability, base area Limited and other problems, to achieve the effect of simple use and discharge, sufficient response, and simple structure

Pending Publication Date: 2021-12-31
GAOYOU HUABAO PIGMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, when mining underground, it is necessary to use a single hydraulic column to support the gob to avoid the roof from falling back. The existing single hydraulic column is a single main structure, and multiple columns are used for independent support to form Downhole support, but it has a single support structure, and the base area is limited, and the support stability is poor. Additional expansion of the base is required, and the construction volume is large, and it cannot form differential support in this area.
[0003] Notification number CN103628901B discloses a mine expansion type anti-shock single hydraulic support, which includes a single hydraulic support and a steel plate. The same shape of the diameter protection tube matched by the single hydraulic support, the closed inner top of the expansion sleeve is connected to the top of the expansion tube, and the anti-tilt sleeve is installed on the periphery of the expansion sleeve and the single hydraulic support. The steel plate is fixed at the top, and the above-mentioned hydraulic support structure adopts a single structure, and the area of ​​the supporting base is fixed, and the stability is still poor

Method used

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  • Preparation method of environment-friendly pigment yellow 151
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Embodiment 1

[0028] The preparation method of a kind of environment-friendly pigment yellow 151 of the present invention is realized in this way, the preparation method of a kind of environment-friendly pigment yellow 151 of the present invention:

[0029] 2) Intermediate preparation:

[0030] 1.1 Using o-phenylenediamine and urea as raw materials to condense in an aqueous medium, a light purple flaky crystal-benzimidazolone was obtained. After condition optimization, the yield was 96.01% and the purity was 99.90%;

[0031] 1.2 Nitrate with concentrated nitric acid in the organic solvent chlorobenzene to obtain dark green spherical solid-5-nitrobenzimidazolone with a yield of 98.60% and a purity of 99.20%;

[0032] 1.3 Then use absolute ethanol as solvent and skeleton nickel as catalyst to carry out liquid phase hydrogenation reduction reaction to obtain -5-aminobenzimidazolone (ABI). After condition optimization, the yield is 94.14% and the purity is 99.90%. ;

[0033] 1.4 Finally, dike...

Embodiment 2

[0044] The preparation method of a kind of environment-friendly pigment yellow 151 of the present invention is realized in this way, the preparation method of a kind of environment-friendly pigment yellow 151 of the present invention:

[0045] 3) Intermediate preparation:

[0046] 1.1 Using o-phenylenediamine and urea as raw materials to condense in an aqueous medium, a light purple flaky crystal-benzimidazolone was obtained. After condition optimization, the yield was 96.01% and the purity was 99.90%;

[0047] 1.2 Nitrate with concentrated nitric acid in the organic solvent chlorobenzene to obtain dark green spherical solid-5-nitrobenzimidazolone with a yield of 98.60% and a purity of 99.20%;

[0048] 1.3 Then use absolute ethanol as solvent and skeleton nickel as catalyst to carry out liquid phase hydrogenation reduction reaction to obtain -5-aminobenzimidazolone (ABI). After condition optimization, the yield is 94.14% and the purity is 99.90%. ;

[0049] 1.4 Finally, dike...

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Abstract

The invention provides a preparation method of environment-friendly pigment yellow 151, relates to a preparation method for preparing pigment yellow 151 by reacting an intermediate with water bath heating, and belongs to the field of chemical production. According to the preparation method for preparing the pigment yellow 151 by matching overall gradient heating with stirring to carry out rapid dispersion reaction and combining an intermediate with an alkaline aqueous solution of from o-phenylenediamine and urea which are used as raw materials to prepare the intermediate, the intermediate reacts with an anthranilic acid alkaline aqueous solution, the temperature and stirring are matched to carry out high-efficiency reaction, high-efficiency dispersion preparation is carried out, and the obtained component is uniform; and heating and vacuum treatment is adopted in the whole reaction, so high preparation rate, full reaction and reduction of the production cost are achieved.

Description

technical field [0001] The invention provides an environment-friendly preparation method of Pigment Yellow 151, relates to a preparation method of Pigment Yellow 151 prepared by reacting an intermediate in combination with heating in a water bath, and belongs to the field of chemical production. Background technique [0002] At present, when mining underground, it is necessary to use a single hydraulic column to support the gob to avoid the roof from falling back. The existing single hydraulic column is a single main structure, and multiple columns are used for independent support to form Downhole support, but it has a single support structure, and the base area is limited, and the support stability is poor. Additional expansion of the base is required, and the construction volume is large, and it cannot form differential support in this area. [0003] Notification number CN103628901B discloses a mine expansion type anti-shock single hydraulic support, which includes a singl...

Claims

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Application Information

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IPC IPC(8): C09B29/33C09B29/01
CPCC09B29/334C09B29/0007
Inventor 鲁彬
Owner GAOYOU HUABAO PIGMENT
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