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Catalyst and preparation method for catalytic hydrolysis of hydrogen cyanide

A technology for catalytic hydrolysis and catalyst, applied in catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of difficult experimental control and harsh preparation conditions, and achieve simple preparation technology and process, high active components The effect of dispersion and low activation temperature

Active Publication Date: 2019-12-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent 103657655A discloses a preparation method of treating HCN catalyst with transition metal nitrate as the active component and alumina and activated carbon as the carrier, but the preparation conditions of this method are harsh and the experimental control is difficult

Method used

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  • Catalyst and preparation method for catalytic hydrolysis of hydrogen cyanide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: The catalyst for the catalytic hydrolysis of hydrogen cyanide in this example is made from the following composition by weight: 93.2% carrier, 5% active component, 1% additive, and the balance is the outer layer of atomic deposition Titanium dioxide; wherein the carrier is titanium-silicon molecular sieve TS-1, the active component is iron oxide, and the auxiliary agent is yttrium oxide; by weight percentage, the content of Ti in the TS-1 molecular sieve is 2.5%;

[0025] A kind of preparation method for the catalyst of hydrogen cyanide catalytic hydrolysis, concrete steps are as follows:

[0026] (1) Preparation of TS-1 mesoporous molecular sieve carrier: mix tetraethyl orthosilicate and butyl titanate evenly to obtain mixed solution A, and drop it into tetrapropylammonium hydroxide aqueous solution under stirring condition to obtain mixed solution Solution B was reacted at a temperature of 50°C under stirring conditions for 30 minutes, then evaporated and r...

Embodiment 2

[0030]Example 2: The catalyst used for the catalytic hydrolysis of hydrogen cyanide in this example is made from the following composition by weight: 94.5% carrier, 4% active component, 0.5% additive, and the balance is the outer layer of atomic deposition Titanium dioxide; wherein the carrier is titanium-silicon molecular sieve TS-1, the active component is copper oxide, and the auxiliary agent is yttrium oxide; by weight percentage, the content of Ti in the TS-1 molecular sieve is 2.5%;

[0031] A kind of preparation method for the catalyst of hydrogen cyanide catalytic hydrolysis, concrete steps are as follows:

[0032] (1) Preparation of TS-1 mesoporous molecular sieve carrier: mix tetraethyl orthosilicate and butyl titanate evenly to obtain mixed solution A, and drop it into tetrapropylammonium hydroxide aqueous solution under stirring condition to obtain mixed solution Solution B reacted at 60°C for 48 minutes under stirring conditions, then evaporated and reacted at 70°...

Embodiment 3

[0036] Example 3: The catalyst for the catalytic hydrolysis of hydrogen cyanide in this example is made from the following composition in weight percentage: 91.8% carrier, 6% active component, 1% additive, and the balance is the outer layer of atomic deposition Titanium dioxide; wherein the carrier is titanium-silicon molecular sieve TS-1, the active components are copper oxide and iron oxide, the mass ratio of copper oxide and iron oxide is 1:1, and the auxiliary agent is magnesium oxide; by weight percentage, TS-1 The content of Ti in the molecular sieve is 1.0%;

[0037] A kind of preparation method for the catalyst of hydrogen cyanide catalytic hydrolysis, concrete steps are as follows:

[0038] (1) Preparation of TS-1 mesoporous molecular sieve carrier: mix tetraethyl orthosilicate and butyl titanate evenly to obtain mixed solution A, and drop it into tetrapropylammonium hydroxide aqueous solution under stirring condition to obtain mixed solution Solution B was reacted a...

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Abstract

The invention relates to a catalyst for catalytic hydrolysis of hydrogen cyanide, and a preparation method thereof, and belongs to the technical field of catalysts. The catalyst is prepared from 91-94.5 wt% of a carrier, 4-6 wt% of an active component, 0.5-1 wt% of an assistant, and the balance of atomically deposited outer layer titanium dioxide, wherein the carrier is titanium silicalite molecular sieve TS-1, the active component is one of copper oxide and iron oxide or a mixture containing the copper oxide and the iron oxide according to an arbitrary ratio, the assistant is one of yttrium oxide and magnesium or a mixture containing the yttrium oxide and magnesium oxide according to an arbitrary ratio, and the mole content of Ti in the TS-1 molecular sieve is 1-2.5%. The catalyst has theadvantages of simple preparation process, cheap and easily available raw materials, suitableness for removing the severely toxic gas hydrogen cyanide in industrial waste gas, and high catalytic hydrolysis efficiency.

Description

technical field [0001] The invention relates to a catalyst for catalytic hydrolysis of hydrogen cyanide and a preparation method thereof, belonging to the technical field of catalysts. Background technique [0002] HCN is a typical, unconventional and highly toxic pollutant in industrial waste gas. The harm of HCN is its acute toxicity on the one hand, which endangers people's lives in extremely small concentrations; on the other hand, it neutralizes O at a certain temperature and gas flow. 2 When it exists at the same time, it will generate corrosive NOx, corrode production equipment and affect production. HCN mainly exists in chemical production and many industrial and mining processes. The existence of hydrogen cyanide has caused great difficulties in the purification and reuse of waste gas. No matter from the perspective of environmental protection or industrial production, it is of great significance to develop efficient catalysts for the catalytic hydrolysis of hydro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/89B01J37/02B01J37/08B01D53/86B01D53/54
CPCB01D53/8621B01D2257/408B01J29/89B01J37/0009B01J37/0201B01J37/0238B01J37/088B01J2229/18
Inventor 张秋林龙开先刘启宪段言康宁平王静刘昕孙梦晗
Owner KUNMING UNIV OF SCI & TECH
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