Carbon-nanometer-tube-carried-Ru-based catalyst and preparing method and application thereof

A technology of carbon nanotubes and catalysts, which is applied in the fields of carbon nanotube-supported Ru-based catalysts and their preparation and application, can solve the problems of separation and purification difficulties, limited product market, side reactions, etc., and achieve wide sources, low raw material costs, The effect of high reactivity

Inactive Publication Date: 2016-07-20
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since sugar alcohols have the characteristics of chelating molecules, Ni and metal oxide supports are prone to chelation reactions with sugar alcohols, resulting in metal elution, which reduces the stability of the catalyst.
In addition, the extreme reaction conditions of high temperature and high pressure (generally above 200 ° C, hydrogen pressure above 10 MPa) lead to the occurrence of various side reactions, and it is difficult to achieve selective regulation of the C-C bond and C-O bond breakage in the reactant molecule; the product is C2- The mixture of C6 diols is difficult to separate and purify, and it is difficult to meet the requirements of the polyester fiber industry for the purity of raw materials, and the product market is limited.

Method used

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  • Carbon-nanometer-tube-carried-Ru-based catalyst and preparing method and application thereof
  • Carbon-nanometer-tube-carried-Ru-based catalyst and preparing method and application thereof
  • Carbon-nanometer-tube-carried-Ru-based catalyst and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 3g of multi-walled carbon nanotubes TNSM2 into a three-necked flask filled with 150mL of concentrated nitric acid (68wt.%), reflux in an oil bath at 140°C for 14h, wash with water until neutral, and obtain open and truncated carbon nanotubes o-TNSM2; Take 100mgo-TNSM2 and add to 15mL (0.27mg / mL) of RuCl 3 In acetone solution, ultrasonic treatment (600W) for 4h, continuous stirring at room temperature to evaporate the acetone, then slowly heated to 110°C in the air to dry for 15h, and then reduced at 350°C for 4h under hydrogen atmosphere, recorded as Ru / TNSM2-in.

Embodiment 2

[0027] Weigh 4g of multi-walled carbon nanotubes TNSM3 and add them to a three-neck flask filled with 150mL of concentrated sulfuric acid (98.3wt.%), heat in an oil bath at 160°C for 12h, wash with water until neutral, and obtain open and truncated carbon nanotubes o-TNSM3 ; Get 120mgo-TNSM3 and join 20mL (0.27mg / mL) of RuCl 3 In the acetone solution, it was treated with ultrasonic (600W) for 3h, continuously stirred at room temperature to evaporate the acetone, then slowly heated to 100°C in the air to dry for 20h, and then reduced under hydrogen atmosphere at 450°C for 3h, recorded as Ru / TNSM3-in.

Embodiment 3

[0029] Weigh 4g of TNM2 into a three-necked flask containing 150mL of mixed acid (wherein V (concentrated sulfuric acid) / V (concentrated nitric acid) = 1 / 1) solution, heat in an oil bath at 160°C for 10 hours, wash with water until neutral, and obtain open and truncated Carbon nanotube o-TNM2; take 240mgo-TNM2 and add to 25mLRuCl 3 (0.27mg / mL) and NH 4 ReO 4 (0.08mg / mL) in acetone solution, ultrasonic treatment (600W) for 5h, continuous stirring at room temperature to evaporate the acetone, then slowly heated to 80°C in the air to dry for 24h, and then reduced at 400°C for 3h under hydrogen atmosphere, denoted as Ru / TNM2-in.

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Abstract

The invention relates to a carbon-nanometer-tube catalyst, in particular to a carbon-nanometer-tube-carried-Ru-based catalyst and a preparing method and application thereof.The catalyst comprises an active component, an assistant and a carrier, wherein the carrier is carbon nanometer tubes, the active component is Ru, the assistant is one or several of metal and metallic oxide, and the molar ratio of the assistant metal element to the active component is (0-0.5):1; the weight percentage of the active component in the catalyst is 1%-10%; the metal is W or Mo or Re or Ir or La.The carbon-nanometer-tube-carried-Ru-based catalyst is good in selectivity and high in activity.

Description

technical field [0001] The invention relates to a carbon nanotube catalyst, in particular to a carbon nanotube loaded Ru-based catalyst and its preparation and application. Background technique [0002] Dihydric alcohol is one of the important raw materials for polyester production. Ethylene glycol, propylene glycol, butanediol, etc. can all be used to react with diacids to produce polyester materials with excellent performance. The demand and output are huge. According to statistics, my country The annual consumption of glycols has exceeded 7 million tons, and more than 80% of them are imported. At present, these diols are generally produced in industry by multi-step reactions such as epoxidation and hydrolysis, using ethylene and propylene as the basic raw materials. The traditional diol production process requires the help of multiple harsh chemical processes, including chlorination, oxidation, hydration, carbonylation and hydrogenation, etc. The process route is long, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J23/656C07C31/20C07C29/00
CPCY02P20/52
Inventor 牟新东郭星翠秦张峰王喜成陈秀芳
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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