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Production method of diamido-arene

A technology for diamino aromatic hydrocarbons and production methods, which is applied in the formation/introduction of amino groups, the preparation of amino compounds, chemical instruments and methods, etc. and high selectivity, beneficial to recycling, and the effect of expanding production scale

Inactive Publication Date: 2011-10-12
常州介孔催化材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of the above process is that it can only be used in batch reactors and cannot be used for continuous production in fixed beds
Although the conversion rate and selectivity of the reaction are high under the optimal conditions they studied, the reaction temperature is high, the catalyst is easily deactivated, the space velocity is too small, and the production cost is high

Method used

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  • Production method of diamido-arene
  • Production method of diamido-arene
  • Production method of diamido-arene

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Weigh 0.05g of palladium chloride and dissolve it in deionized water containing hydrochloric acid, and impregnate 3.0g of mesoporous carbon in equal volume (the pore volume of mesoporous carbon is 0.9mL / g, and the specific surface area is 700m 2 / g, pore diameter is 5nm), impregnated for 10h, and then dried at 120°C to obtain the catalyst precursor.

[0027] 0.3g of the catalyst precursor was placed in the constant temperature zone of the reactor, and both ends were supported by quartz sand. Restore with hydrogen at 250°C for 3 hours, lower the reaction temperature to 60°C, increase the hydrogen pressure to 3.0MPa, add methanol simulation raw material containing 20% ​​m-dinitrobenzene to carry out hydrogenation reaction, the mass space velocity of m-dinitrobenzene It is 2.5 kg / (kg catalyst) / hour. After about 5 hours of stabilization, a sample was collected every 15 minutes for compositional analysis by gas chromatography. The number of samples collected is not less th...

Embodiment 2

[0029] 0.05 g of palladium chloride in Example 1 was replaced with 0.06 g of ruthenium chloride, the composition is shown in Table 1, and other steps were the same as in Example 1.

Embodiment 3

[0031] Replace 0.05g palladium chloride in the embodiment 1 with the silver nitrate of 0.047g, see table 1 for composition, other steps are the same as embodiment 1.

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Abstract

The invention relates to a production method of diamido-arene such as m-phenylenediamine. In the production method, a noble metal carried on a novel carbon material serving as a carrier is used as a catalyst, and the catalyst is used for a fixed bed reactor; and nitro-substituted arene is used as a raw material, and reaction conversion rate and selectivity are high at relatively low temperature and relatively large space velocity.

Description

technical field [0001] The invention belongs to the technical fields of fine chemical industry and organic chemical industry, and specifically relates to a production method of arylamine. Background technique [0002] Arylamine is a commonly used raw material in the chemical industry. Its representative m-phenylenediamine, also known as 1,3-diaminobenzene, is a white needle-like crystal. It is an important organic chemical raw material and intermediate with multiple uses. Due to its strong coupling ability, m-phenylenediamine is widely used in the synthesis of azo dyes, fur dyes, reactive dyes and sulfur dyes in the dye industry. Such as synthetic basic orange, basic brown, sulfur yellow, etc.; at the same time, it is also used to prepare mordant, hair dye, color developer, rubber compounding agent, epoxy resin curing agent, petroleum additive, cement coagulant and metal dissolver Wait. In recent years, high temperature resistant aromatic polyamide resins and flame retarda...

Claims

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Application Information

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IPC IPC(8): C07B43/04C07C211/51C07C209/36
Inventor 李明时沈俭一鲁墨弘张伟
Owner 常州介孔催化材料有限公司
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