Catalyst for methanol amination to methylamine

Overview:

Methylamine is an important organic chemical product, widely used in pesticides, medicine, solvents and dyes. The vapor phase catalytic amination method using methanol and ammonia as raw materials is the main method for the production of methylamine at home and abroad at present. The mixture of monomethylamine, dimethylamine and trimethylamine is generated by using silica-aluminum solid acid balanced catalyst. The structure of the product is close to the thermodynamic equilibrium composition. Since the 1980s, the research of methanol vapor amination technology to produce methylamine has been carried out, and four brands of balanced methylamine catalyst and complete process package technology of A-2, A-6, A-6A and A-16 have been successfully developed and realized industrialization. Among them, A-16 methylamine catalyst has made A major breakthrough in the inhibition of side reactions, which meets the needs of green development of methylamine production.

Methanol vapor phase amination technology to produce methylamine has independent intellectual property rights, and won. Shanghai Technology invention second prize.

Complete technology of methanol amination to methylamine:

A process package of 10,000 tons methanol amination to methylamine was developed. Its technical characteristics are as follows:

(1) Operation flexibility: strong adaptability of raw materials, through -methylamine, trimethylamine partial return or full return, to achieve -methylamine /= = methylamine/trimethylamine product weight ratio 1/8/1, to meet market demand.

(2) High yield and low material consumption: the catalyst has the characteristics of high activity, good stability, high selectivity of dimethylamine and low unit consumption of raw materials.

(3) Energy saving and environmental protection: the process design pays attention to energy saving and environmental protection, and fully recovers energy to reduce energy consumption through reasonable configuration of heat exchange network; The process of tail gas absorption and methanol recovery is adopted to reduce the emission of three wastes and meet the requirements of environmental protection.

Methanol amination to methylamine catalyst:

At present, the main grades of A-series catalysts in use are A-6A and A-16, and their main characteristics are as follows:

(1) High strength, uniform particles and low pulverization are conducive to improving airflow release and reducing catalyst bed lamination.

(2) High activity, good stability, less side reactions, low environmental pressure.

Main performance indicators:

(1) Methanol conversion rate is 299%

(2) DMA selectivity 27%

(3) Catalyst life ≥2 years

Promotion and application:

Methanol vapor phase amination catalyst for methylamine production has been applied in more than 20 sets of industrial plants for more than 50 times. The new A-16 methylamine catalyst will achieve industrial application in 2020, and the performance index is better than A-6A catalyst.