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A kind of preparation method and application of ni-cnt catalyst for hydrogenated dimer acid production

A technology for hydrogenating dimer acid and catalyst, which is applied in the field of nanomaterial technology and organic chemical industry, which can solve the problems of limited conversion rate of dimer acid raw materials, catalyst service time failure, and low catalyst activity, so as to improve reaction rate and raw material conversion efficiency, long service life, and large specific surface area

Active Publication Date: 2022-06-14
NANJING POLYTECHNIC INSITUTE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, dimer acid is hydrogenated to generate hydrogenated dimer acid. Catalysts such as platinum and palladium are added in the reaction process, and the cost is high; due to the high viscosity of dimer acid, the catalyst is easily wrapped and the activity is not high. It will fail if it is not used for a long time, and the conversion rate of dimer acid raw materials is limited

Method used

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  • A kind of preparation method and application of ni-cnt catalyst for hydrogenated dimer acid production
  • A kind of preparation method and application of ni-cnt catalyst for hydrogenated dimer acid production
  • A kind of preparation method and application of ni-cnt catalyst for hydrogenated dimer acid production

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preparation example Construction

[0030] A preparation method and application of a catalyst for hydrogenated dimer acid production, comprising the steps of:

[0031] Step 1: preparing a Ni-CNT catalyst for hydrogenated dimer acid production;

[0032] Step 2: Online activation of Ni-CNT catalyst;

[0033] Switch the device for preparing crude Ni-CNT catalyst to nitrogen replacement and hydrogen atmosphere activation conditions to reduce the Ni in Ni-CNT to a simple reduction state, which is used for hydrogenation of dimer acid to produce hydrogenated dimer acid;

[0034] Step 3: dimer acid hydrogenation reaction generates hydrogenated dimer acid;

[0035] The dimer acid is diluted with a dissolving inert solvent, and after preheating, it is metered into the activated and heated catalyst after preheating; the dimer acid (ie unsaturated dimer acid) has 1-3 C=C bonds.

[0036] Step 4: Vacuum the separator, separate the inert solvent online, and circulate the inert solvent to dilute the dimer acid; collect the hy...

Embodiment 1

[0043] Catalyst preparation: Mix nickelocene, ethanol, and carbon disulfide at a molar ratio of 1:50:5, spray into the quartz tube, the quartz tube is an argon atmosphere, the temperature inside the quartz tube is 300°C, the flow rate of argon gas is 0.800L / min, and the reaction time is 50min , cooled to room temperature under the conditions of a water vapor flow rate of 0.040L / min and an argon flow rate of 0.800L / min to obtain a fibrous crude product nickel-carbon nanotube (Ni-CNT) catalyst, the crude product Ni-CNT catalyst was washed and dried For later use; place the crude Ni-CNT catalyst in a quartz tube, replace the air in the quartz tube with an inert gas, and then pass in a hydrogen flow, the hydrogen flow rate is 1.000L / min, the activation temperature is 250°C, and the activation time is 200min, so that the Ni-CNT Ni in the catalyst is reduced to a single substance to obtain an activated Ni-CNT catalyst, which is used as a catalyst for hydrogenating dimer acid to produ...

Embodiment 2

[0046] Catalyst preparation: Mix nickelocene, ethanol, and carbon disulfide at a molar ratio of 1:100:5, spray into the quartz tube, the quartz tube is an argon atmosphere, the temperature inside the quartz tube is 350°C, the argon flow rate is 1.000L / min, and the reaction time is 30min , cooled to room temperature under the conditions of a water vapor flow rate of 0.040L / min and an argon flow rate of 1.000L / min to obtain a fibrous crude product nickel-carbon nanotube (Ni-CNT) catalyst, the crude product Ni-CNT catalyst was washed and dried Reserve for later use; place the crude Ni-CNT catalyst in a quartz tube, replace the air in the quartz tube with an inert gas, and then pass in a hydrogen flow, the hydrogen flow rate is 1.000L / min, the activation temperature is 280°C, and the activation time is 200min, so that the Ni-CNT Ni in the catalyst is reduced to a single substance to obtain an activated Ni-CNT catalyst, which is used as a catalyst for hydrogenating dimer acid to pro...

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Abstract

The invention relates to a preparation method and application of a Ni-CNT catalyst for hydrogenated dimer acid production, and belongs to the field of material technology and organic synthesis, comprising the following steps: Step 1: preparing a Ni-CNT hydrogenated dimer acid catalyst; Step 2 : On-line activation of Ni-CNT catalyst; step three: hydrogenation reaction of dimer acid to generate hydrogenated dimer acid; step four: on-line separation of solvent. Compared with the prior art, the invention has the beneficial effects that: the hydrogenated dimer acid can be continuously produced on a large scale, the production process is simplified, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to a preparation method and application of a Ni-CNT catalyst for hydrogenated dimer acid production, which is used for dimer acid hydrogenation reaction to produce hydrogenated dimer acid, and belongs to the field of nanometer material technology and organic chemical industry. Background technique [0002] Hydrogenated dimer acid is an aliphatic saturated diacid with 36 carbon atoms, which is obtained by catalytic hydrogenation of unsaturated dimer acid containing double bonds; due to the presence of two carboxyl reactive functional groups, and the molecule no longer contains double bonds , so that its polymer product has better thermal stability and is used in drug sustained release, biological tissue repair and other special material industries. [0003] In the prior art, dimer acid is hydrogenated to generate hydrogenated dimer acid. Catalysts such as platinum and palladium are added in the reaction process, and the cost is rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J37/08B01J37/18C07C51/36C07C55/28C07C55/02C07C55/30
CPCB01J23/755B01J37/086B01J37/18C07C51/36C07C2601/14C07C2602/10C07C55/28C07C55/02C07C55/30
Inventor 于清跃孙高鑫石景王一男
Owner NANJING POLYTECHNIC INSITUTE
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