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Production process for preparing phthalonitrile by using ammoxidation method

A technology for producing phthalonitrile and a production process, which is applied in the field of production technology for preparing phthalonitrile, can solve problems such as excessive side reactions and affecting the yield of final products, achieve high activity, improve production technology, and select sex high effect

Active Publication Date: 2014-04-09
HUBEI JUNTAI PHARMA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, adopting the traditional production process to prepare phthalonitrile has too many side reactions and affects the yield of the final product

Method used

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  • Production process for preparing phthalonitrile by using ammoxidation method
  • Production process for preparing phthalonitrile by using ammoxidation method

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Experimental program
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Embodiment Construction

[0011] In order to improve the yield in the production process of preparing phthalonitrile by ammoxidation, aiming at the synthesis characteristics of phthalonitrile, the process of the present invention prepares phthalonitrile from catalyst and reaction temperature and other processing conditions. The process of nitrile is improved.

[0012] First, improve the catalyst system. The selection of the catalyst system is the key to the synthesis of phthalonitrile, through repeated experiments and screening, the final selection of V a P b co c Ti d o x (wherein: a=1, b=0.5~1.5, c=0.3~0.8, d=0.31, x=45%) as active catalyst. The catalyst has the advantages of simple preparation, mild reaction conditions, long service life and high selectivity, and can obviously increase the yield of products. In order to improve the service life of the catalyst, under the premise of ensuring the activity of the catalyst, coarse-pore mixed spherical silica gel can be selected as the carrier and ...

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Abstract

The invention provides a production process for preparing phthalonitrile by using an ammoxidation method. In the production process, VaPbCocTidOx is used as an active catalyst, wherein a=1, b=0.5-1.5, c=0.3-0.8, d=0.31 and x=45 percent, the reaction temperature of the production process is 370-380 DEG C. In the production process of the invention, the VaPbCocTidOx is used as the active catalyst which has the characteristics of high activity, high selectivity and the like, thereby the production process of phthalonitrile is improved, and the yield rate of the product is obviously increased.

Description

【Technical field】 [0001] The invention relates to the technical field of chemical industry, in particular to a production process for preparing phthalonitrile by an ammoxidation method. 【Background technique】 [0002] Phthalonitrile is an organic intermediate, which is widely used in the synthesis of high thermal resistance polyamide and polyester fibers, new xylyl diisocyanate plastics, desulfurization catalysts and coatings, inks, dyes, and can also be used to produce high-grade series Copper phthalocyanine, an important parent of phthalocyanine pigments, is an irreplaceable organic intermediate. [0003] Copper phthalocyanine can be prepared by reacting phthalonitrile with copper or cuprous chloride. As the precursor of phthalocyanine pigments, it can be used to synthesize a series of phthalocyanine pigments. Because phthalocyanine pigments have the characteristics of heat resistance, light resistance, acid resistance, alkali resistance and bright color, they have develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C255/51C07C253/28B01J27/198
CPCY02P20/584
Inventor 刘胜明陈川左国华
Owner HUBEI JUNTAI PHARMA CHEM