124-09-4Relevant articles and documents
Supported Ni catalyst for liquid phase hydrogenation of adiponitrile to 6-Aminocapronitrile and hexamethyenediamine
Wang, Chengqiang,Jia, Zekun,Zhen, Bin,Han, Minghan
, (2018)
Supported Ni catalysts prepared under different conditions, for liquid phase hydrogenation of adiponitrile (ADN) to 6-aminocapronitrile (ACN) and hexamethyenediamine (HMD), were investigated. The highly reactive imine intermediate can form condensation byproducts with primary amine products (ACN and HMD), which decreased the yield coefficient of primary amines. The catalysts support, condition of catalyst preparation and dosage of additive were studied to improve the yield. A highly dispersed Ni/SiO2 catalyst prepared by the direct reduction of Ni(NO3)2/SiO2 suppressed the condensation reactions by promoting the hydrogenation of adsorbed imines, and it gave the improved hydrogenation activity of 0.63 mol·kgcat?1·min?1 and primary amine selectivity of 94% when NaOH was added into the reactor.
Method for preparing 1, 6-hexamethylenediamine from 5-hydroxymethylfurfural
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Paragraph 140; 0146; 0148, (2021/06/06)
The invention relates to a method for preparing 1, 6-hexamethylenediamine from 5-hydroxymethylfurfural, which is characterized in that the 5-hydroxymethylfurfural is used as a raw material, and the 1, 6-hexamethylenediamine is synthesized by a two-step method under the action of a catalyst. The method comprises the following steps: 1) in a hydrogen atmosphere, reacting the raw material 5-hydroxymethylfurfural with ammonia in the presence of a reductive amination catalyst to generate 2, 5-dimethylamine tetrahydrofuran; and 2) continuing the reaction, and carrying out a ring-opening reaction on the hydrodeoxygenation catalyst to produce the target product 1, 6-hexamethylenediamine. The method is characterized in that the reductive amination catalyst in the step 1) is an M1-M2 supported multi-metal component catalyst. The method is characterized in that the hydrodeoxygenation catalyst in the step 2) is a supported catalyst, and the metal active component is selected from one or more of transition metal elements Rh, Re, Pt, Ir, Pd and Ru. The 1, 6-hexamethylenediamine is produced by using the bio-based material monomer 5-hydroxymethylfurfural as the raw material, so that the method is green and clean, the process is easy to operate, the yield is high, and a wide application prospect is provided for biomass conversion.
Method for synthesizing 1,6-hexamethylenediamine by catalyzing hydrogenation ring opening of 2,5-dicyanofuran
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Paragraph 0070-0126, (2021/06/22)
The invention discloses a method for synthesizing 1,6-hexamethylenediamine by catalyzing hydrogenation ring opening of 2,5-dicyanofuran. The method comprises the following step: in a hydrogen source environment, subjecting a material containing 2,5-dicyanofuran to contacting and reacting with a catalyst so as to obtain 1,6-hexamethylenediamine, wherein the catalyst comprises an acidic carrier and a metal element; and the metal element is loaded on the acidic carrier. The method is a novel hydrogenation ring-opening technology which is high in yield, low in cost, easy in catalyst separation and low in pollution and uses hydrogen gas as a hydrogen source to prepare 1,6-hexamethylenediamine through ring-opening hydrogenation of 2,5-dicyanofuran. The method has wide application prospects.