Catalyst for preparing 6-aminocapronitrile from cyclohexanone-oxime and application of catalyst
A technology for cyclohexanone oxime and aminocapronitrile is applied in the field of catalysts for preparing 6-aminocapronitrile from cyclohexanone oxime, which can solve the problems of less investment, more three wastes, short technological process, etc., and saves investment and reduces energy consumption. , reduce the effect of the process
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Embodiment 1
[0025] Example 1: Preparation of catalyst based on titanium silicon molecular sieve
[0026] Using silica sol as the silicon source, titanium tetrachloride or butyl titanate as the titanium source, and tetrapropylammonium bromide as the template agent, a homogeneous glue solution is prepared at room temperature, and the phosphate is composed of 20-50 parts according to the catalyst. , 1-20 parts of metal oxide, 30-60 parts of molecular sieve, add anhydrous magnesium phosphate and titanium dioxide, mix and stir evenly, then put into an autoclave, and crystallize at 150-200 ℃ autogenous pressure for 5-7 days to obtain solid powder After being filtered, washed and dried, calcined at 500-600° C. for 5-15 hours to obtain catalyst A whose molecular sieve is a titanium-silicon molecular sieve.
Embodiment 2
[0027] Example 2 Preparation of catalyst based on all-silicon molecular sieve
[0028] Add ethyl silicate, tetrapropyl ammonium hydroxide solution and ethanol to the reaction kettle to form a gel-sol mixture raw material, which is composed of 20-50 parts of phosphate, 1-20 parts of metal oxide, and 30-60 parts of molecular sieve according to the catalyst. Add barium phosphate and titanium dioxide in a proportion of parts, crystallize at 100-170 ° C for 2-5 d, wash with water to pH 7.5-8.5, and dry; roast at 500-600 ° C for 5-15 hours to prepare all-silicon molecular sieve-based catalyst B.
Embodiment 3
[0029] Example 3 Preparation of catalyst based on ZSM-5 molecular sieve
[0030] A certain amount of aluminum isopropoxide (AIP) was dissolved in an aqueous solution containing a templating agent, stirred by a magnetic stirrer for several hours until dissolved, then ethyl orthosilicate (TEOS) was added, and the raw material mixture was kept at room temperature. Stir overnight to make it completely hydrolyzed, and add anhydrous magnesium phosphate and titanium dioxide according to the ratio of catalyst composition of 20-50 parts of phosphate, 1-20 parts of metal oxide, and 30-60 parts of molecular sieve. The template agent is one or more of tetrapropylammonium hydroxide (TPAOH), n-butylamine (n-BTA) and ethanol (Ethanol), and the initial gel ratio is 20-50Mg 3 (PO 4 ) 2 : 1-20TiO 2 : 1-5Al 2 O 3 : 30-60SiO 2 : 5-15 TPAOH: 3-8 n-BTA: 2-5 Ethanol: 2500 H 2 O. The raw material mixture was placed in a crystallization kettle with polytetrafluoroethylene, reacted at 170 °C fo...
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