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Zinc-based catalyst used for catalyzing acetylene hydration reaction and preparation method thereof

A technology of acetylene hydration and catalyst, which is applied in the direction of catalyst activation/preparation, carbon-carbon triple bond hydration preparation, physical/chemical process catalysts, etc. It can solve the problems of poor stability, high energy consumption, and low selectivity, and achieve improved product quality. The effect of high performance, small particles, and simple preparation process

Pending Publication Date: 2020-05-22
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, the solid-phase reaction of acetylene hydration gas is basically carried out by using transition metal ion catalysts at relatively high reaction temperatures, which mainly have problems such as high energy consumption, low selectivity and poor stability.

Method used

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  • Zinc-based catalyst used for catalyzing acetylene hydration reaction and preparation method thereof
  • Zinc-based catalyst used for catalyzing acetylene hydration reaction and preparation method thereof
  • Zinc-based catalyst used for catalyzing acetylene hydration reaction and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The specific operation steps are as follows:

[0036] (1) Preparation of precursor solution: 2 g of zinc chloride was completely dissolved in 18.0 mL of deionized water to obtain a precursor solution;

[0037] (2) Prepare the catalyst: add the precursor solution dropwise to the molecular sieve carrier, stir for 12 hours, let stand for 12 hours, and dry at 100° C. for 18 hours to obtain the catalyst, namely Zn / MCM-41 catalyst.

[0038](3) Plasma treatment: the prepared catalyst is processed under nitrogen, ammonia, oxygen and air plasma atmosphere respectively, the treatment condition is that the time is 30min, the power is 100w, and the gas flow is 10mL / min, to obtain the described Zinc-based catalysts for catalyzing the hydration of acetylene, namely P-Zn / MCM-N 2 , P-Zn / MCM-NH 3 , P-Zn / MCM-O 2 , P-Zn / MCM-air.

[0039] In order to more vividly describe the structure of the plasma-treated catalyst prepared under different atmospheres, we carried out N 2 Adsorption a...

Embodiment 2

[0045] The specific operation steps are as follows:

[0046] (1) Preparation of precursor solution: 2 g of zinc chloride was completely dissolved in 18.0 mL of deionized water to obtain a precursor solution;

[0047] (2) Prepare the catalyst: add the precursor solution dropwise to the molecular sieve carrier, stir for 12 hours, let stand for 12 hours, and dry at 100° C. for 18 hours to obtain the catalyst, namely Zn / MCM-41 catalyst.

[0048] (3) Plasma treatment: the prepared zinc-based catalyst is treated under an oxygen plasma atmosphere, the treatment conditions are that the power is 100w, the gas flow rate is 10mL / min, and the time is 30min, 60min, 90min, 120min respectively, depending on Zinc-based catalysts for the hydration of acetylene by temporal oxygen plasma treatment.

[0049] During the activity test, when the reaction temperature is 100-400°C, C 2 h 2 The flow rate is 3.4mL / min, H 2 The flow rate of O is 0.01g / min, and the space velocity is adjusted to 90h -...

Embodiment 3

[0051] The specific operation steps are as follows:

[0052] (1) Preparation of precursor solution: 2 g of zinc chloride was completely dissolved in 18.0 mL of deionized water to obtain a precursor solution;

[0053] (2) Prepare the catalyst: add the precursor solution dropwise to the molecular sieve carrier, stir for 12 hours, let stand for 12 hours, and dry at 100° C. for 18 hours to obtain the catalyst, namely Zn / MCM-41 catalyst.

[0054] (3) Plasma treatment: The prepared zinc-based catalyst was treated in an oxygen plasma atmosphere. The treatment conditions were 30 minutes, a gas flow rate of 10 mL / min, and a power of 50w, 75w, and 100w to obtain different oxygen plasmas. Zinc-based catalysts for the hydration of acetylene for bulk discharge power processing.

[0055] During the activity test, when the reaction temperature is 100-400°C, C 2 h 2 The flow rate is 3.4mL / min, H 2 The flow rate of O is 0.01g / min, and the space velocity is adjusted to 90h -1 Under the con...

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Abstract

The invention relates to a zinc-based catalyst used for catalyzing an acetylene hydration reaction and a preparation method thereof. The preparation method for the zinc-based catalyst used for catalyzing the acetylene hydration reaction comprises the following steps: (1) completely dissolving zinc salt into deionized water so as to obtain a precursor solution; (2) soaking a carrier into the precursor solution, carrying out stirring for 10-14 hours, then carrying out standing for 10-14 hours, and carrying out drying so as to obtain a catalyst; and (3) performing plasma treatment, i.e., carryingout plasma treatment on the catalyst in different plasma atmospheres so as to obtain the zinc-based catalyst used for catalyzing the acetylene hydration reaction. The zinc-based catalyst used for catalyzing the acetylene hydration reaction and the preparation method thereof provided by the invention have the following advantages: the preparation process is simple and short in time; the preparation process is clean and free of pollution; the obtained catalyst is high in efficiency, good in activity in the acetylene hydration reaction and high in selectivity; and the prepared catalyst is a non-mercury catalyst, is used for the acetylene hydration reaction, and can solve the problems of environmental pollution and harm to the human health due to a volatile mercury catalyst.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a zinc-based catalyst for catalyzing the hydration reaction of acetylene and a preparation method thereof. Background technique [0002] Acetaldehyde, also known as acetic aldehyde, is an important organic chemical raw material and an intermediate in the synthesis of important organic chemicals such as pyridine, acetic acid, acetic anhydride, acetate and pentaerythritol. Since the industrialization of acetylene hydration to produce acetaldehyde in 1916, acetylene has become an important raw material in coal-based chemicals, and acetylene hydration has become an important industrial method for the production of acetaldehyde. However, with the rapid development of petrochemical industry, the production of acetaldehyde by ethylene oxidation method using ethylene as raw material was industrialized in 1960, and the process of hydration of acetylene to produce acetaldehyde was quic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/04B01J37/34C07C45/26C07C47/06
CPCB01J29/041B01J37/349C07C45/26B01J2229/40B01J2229/186C07C47/06
Inventor 代斌张苏弟王琴琴
Owner SHIHEZI UNIVERSITY
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