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Catalyst for production of 1,4-butynediol and preparation method of catalyst

A technology of butynediol and catalyst, applied in the field of catalyst and its preparation, can solve the problems of small particles, poor mechanical strength of the catalyst, easy loss and the like, and achieves the effects of good activity, high selectivity and easy activation

Active Publication Date: 2013-03-06
大连瑞克科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the 1970s, a new process using malachite as a catalyst was developed. The catalyst is characterized by small particles and good activity. However, when it reacts in a slurry bed, the catalyst is not wear-resistant and is easy to lose.
However, this type of catalyst has the following disadvantages: the preparation process of the catalyst requires high-temperature calcination, the mechanical strength of the catalyst is poor, the catalyst is easily lost during use, and the carrier preparation process used is complicated and relatively expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The catalyst is prepared according to the catalyst composition (by mass percentage): 40% of carrier nano-silica, 55% of basic copper carbonate, and 5% of bismuth basic carbonate.

[0017] (1) Weigh 93.2g of copper nitrate, dissolve it in 372.8g of distilled water, and prepare a copper salt solution with a concentration of copper nitrate of 20%, weigh 6.9g of bismuth nitrate, dissolve it in 62.1g of dilute nitric acid, and prepare a concentration of bismuth nitrate 10% bismuth salt solution, mix the two solutions, adjust the pH of the solution to 1.0 with nitric acid, and fully dissolve the bismuth salt;

[0018] (2) Weigh 40g of nano-silica carrier and add it to the reactor and mix it with 160% water to prepare a slurry with a carrier mass percentage of 20%;

[0019] (3) Add the salt solution prepared in step (1) to the carrier slurry prepared in (2), and stir thoroughly for 0.5h;

[0020] (4) Add 17g of urea to step (3), heat up and stir to maintain 80°C, stir for 4 h...

Embodiment 2

[0023] The catalyst is prepared according to the composition of the catalyst (by mass percentage): 25% of carrier nano-silica, 67% of basic copper carbonate, and 8% of bismuth basic carbonate.

[0024] (1) Weigh 113.5g of copper nitrate, dissolve it in 453.9g of distilled water, and prepare a copper salt solution with a concentration of copper nitrate of 20%, weigh 11.0g of bismuth nitrate, dissolve it in 99.0g of dilute nitric acid, and prepare a concentration of bismuth nitrate 10% bismuth salt solution, mix the two solutions, adjust the pH of the solution to 1.0 with nitric acid, and fully dissolve the bismuth salt;

[0025] (2) Weigh 25g of nano-silica carrier and add it to the reactor and mix it with 100% of water to prepare a slurry with a carrier mass percentage of 20%;

[0026] (3) Add the salt solution prepared in step (1) to the carrier slurry prepared in (2), and stir thoroughly for 0.5h;

[0027] (4) Add 20.8g of urea to step (3), heat up and stir to maintain 80°C...

Embodiment 3

[0030] The catalyst is prepared according to the catalyst composition (by mass percentage): 40% of carrier nano-silica, 55% of basic copper carbonate, and 5% of bismuth basic carbonate.

[0031] (1) Weigh 93.2g of copper nitrate, dissolve it in 372.8g of distilled water, and prepare a copper salt solution with a concentration of copper nitrate of 20%, weigh 6.9g of bismuth nitrate, dissolve it in 62.1g of dilute nitric acid, and prepare a concentration of bismuth nitrate 10% bismuth salt solution, mix the two solutions, adjust the pH of the solution to 1.0 with nitric acid, and fully dissolve the bismuth salt;

[0032] (2) Weigh 40g of nano-silica carrier and add it to the reactor and mix it with 160% water to prepare a slurry with a carrier mass percentage of 20%;

[0033] (3) Add the salt solution prepared in step (1) to the carrier slurry prepared in (2), and stir thoroughly for 0.5h;

[0034] (4) Add 34g of urea to step (3), heat up and stir at 90°C, stir for 6 hours to f...

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Abstract

The invention discloses a catalyst for production of 1,4-butynediol and a preparation method of the catalyst, belongs to the field of catalyst research, more particularly relates to a load type catalyst for production of 1,4-butynediol in a slurry reactor and a preparation method of the catalyst. According to the method, nanosilicon dioxide which has a larger external specific surface is used as a carrier, copper and bismuth are attached to the carrier by adopting a settling and depositing method, the active components of the catalyst exist in a form of basic cupric carbonate, and the catalyst comprises the following components in percentage by mass: 20-50 percent of carrier, 35-70 percent of basic cupric carbonate and 2-15 percent of bismuth subcarbonate. The prepared catalyst has the characteristics of good activity and high selectivity and is easy to activate.

Description

technical field [0001] The invention relates to a catalyst for the production of 1,4-butynediol and a preparation method thereof, belonging to the field of catalyst research, more precisely, a supported catalyst for 1,4-butyne used in a slurry bed Catalysts for diol production and methods for their preparation. Background technique [0002] 1,4-butanediol (BDO) prepared by catalytic hydrogenation of 1,4-butynediol (BD) is an important organic synthesis intermediate for the production of γ-butyrolactone (GBL), tetrahydrofuran (THF), polybutylene diphthalate (PBT), etc. In recent years, due to the sudden increase in the demand for PBT and other derivatives, the demand for BDO in my country has increased significantly. BD can be synthesized by acetylene of formaldehyde. my country has abundant coal and natural gas resources, and the output of calcium carbide accounts for about one-third of the world's total output of calcium carbide. Therefore, it is unique to produce 1,4-but...

Claims

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Application Information

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IPC IPC(8): B01J27/236C07C33/046C07C29/42
Inventor 周焕文邓少亮乔川曲雪琴
Owner 大连瑞克科技股份有限公司
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