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Catalyst for producing propynyl alcohol by cracking butynediol and preparation method thereof

A butynediol and catalyst technology, which is applied in molecular sieve catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of limited market capacity, low yield, high production cost, etc., and achieve mass production and process conditions Simplicity and the effect of reducing production costs

Active Publication Date: 2021-08-03
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, the yield of propargyl alcohol is 37%, and most of the rest is by-product 1,4-butynediol (BYD) (hereinafter referred to as butynediol or BYD), and 1,4-butynediol Therefore, the yield of propargyl alcohol in this process has a strong impact on the economic benefits of the enterprise
[0004] Patents CN103896737A, US3383427A, etc. also disclose other methods for preparing propargyl alcohol. These patented synthetic methods have high cost or low yield. For example, CN103896737A provides a method for preparing propargyl alcohol using a microstructure reactor, using Grignard reagent, acetylene and Aldehydes or ketones are prepared as raw materials. This method uses a microstructure reactor to ensure intrinsic safety, but the cost of Grignard reagents is high
[0005] In addition, the patent CN108503505A selects the synthesis catalyst of 1,4-butynediol as the catalyst to catalytically crack 1,4-butynediol to prepare propynyl alcohol, but this method has low yield and slow reaction rate, and additional It is difficult to separate the reaction solvent and catalyst, and the whole process needs to be run under the protection of acetylene gas, which not only leads to high production costs, but also has potential operational risks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The catalyst for producing propynyl alcohol by cracking butynediol is prepared from a carrier of 16% potassium nitrate, 0.1% bismuth nitrate, 1% auxiliary copper nitrate and 82.9% pseudo-boehmite. The preparation method is as follows: (1) take 16.3g of potassium nitrate and dissolve it in deionized water to form an aqueous solution; (2) weigh 82.9g of pseudo-boehmite and 2g of asparagus powder, mix them evenly and add them in step (1 ) kneading, extruding, drying at 100°C for 4 hours, and roasting at 500°C for 4 hours to obtain a catalyst precursor; (3) Weigh 1.1g copper nitrate, 1.0g bismuth nitrate, add deionized water Dissolving to form a solution; (4) Weighing 100 g of the catalyst precursor prepared in step (2) and immersing in the aqueous solution prepared in step (3), soaking at room temperature for 8 hours, drying at 100° C. for 4 hours, and roasting at 500° C. for 3 hours, namely The catalyst of this example was prepared. The catalyst has a pressure of 0.2MPa,...

Embodiment 2

[0035] The catalyst of this example is prepared from 32% active component potassium nitrate, 0.1% additive bismuth nitrate, 5% additive copper nitrate, 60% pseudoboehmite, and other zirconia carriers. The preparation method is as follows: (1) Weigh 32.0g of potassium acetate and dissolve it in deionized water to form an aqueous solution; (2) Weigh out 60.2g of pseudo-boehmite, 3.1g of zirconia, 5g of hydroxymethylcellulose, After mixing evenly, add the solution prepared in step (1) for kneading, extruding, drying at 120°C for 3 hours, and roasting at 550°C for 6 hours to obtain a catalyst precursor; (3) Weigh 0.1g bismuth nitrate, 5.0g Copper nitrate was dissolved in deionized water to form a solution; (4) 100 g of the catalyst precursor prepared in step (2) was weighed and immersed in the aqueous solution prepared in step (3), immersed at room temperature for 6 hours, and dried at 120° C. for 3 hours, Roasting at 550°C for 3h, the catalyst of this example is obtained. The cat...

Embodiment 3

[0037] Get the catalyst prepared in Example 2, carry out catalytic cracking, at a pressure of 0.5MPa, a reaction temperature of 330°C, a mass concentration of butynediol of 22%, and a feed liquid space velocity of 0.5h -1 Tested under the conditions, the conversion rate of butynediol is 26.3%, and the selectivity of propynyl alcohol is 57.4%.

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Abstract

The invention belongs to the field of industrial catalysis, and in particular relates to a catalyst for producing propynyl alcohol by cracking butynediol and a preparation method thereof. A catalyst for producing propynyl alcohol by cracking butynediol. The catalyst is a solid superbase made of a carrier loaded with a main active component and a coagent. The main active component is one or more of an alkali metal and an alkaline earth metal. Various, the coagent is copper and / or bismuth. It can directly catalyze the cracking of butynediol in an aqueous solution of butynediol to prepare propynyl alcohol. The invention also provides the technological conditions for using the catalyst to catalyze the cracking of butynediol, which can increase the conversion rate of butynediol to 46.3% and the selectivity of propynyl alcohol to 57.4% in the tubular reaction.

Description

technical field [0001] The invention belongs to the field of industrial catalysis, and in particular relates to a catalyst for producing propynyl alcohol by cracking butynediol and a preparation method thereof. Background technique [0002] Proynyl alcohol, also known as 2-propyn-1-ol, ethynylmethanol, propargyl alcohol, is a flammable liquid, easily soluble in water, alcohol, ether and other organic solvents, and is also an important chemical intermediate . Propigyl alcohol can be used to synthesize fosfomycin sodium, fosfomycin calcium, sulfadiazine, acrolein, vitamin A, etc. It can also be used as a brightener in the electroplating industry, and can also be used as a rust remover or preservative. Propylene alcohol has unique properties in inhibiting the corrosion of acetic acid, phosphoric acid, sulfuric acid, hydrochloric acid and other acidic substances on iron, copper, nickel and other metals. . [0003] The commonly used preparation method of propyne is the alkyne ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/843B01J23/72B01J29/00C07C29/00C07C33/042
CPCB01J23/72B01J23/8437B01J29/00B01J2523/00C07C29/00B01J2523/12B01J2523/17B01J2523/31B01J2523/48B01J2523/15B01J2523/13B01J2523/54C07C33/042
Inventor 谭平华全学军唐聪明李新利曹平
Owner CHONGQING UNIV OF TECH
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