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Method for preparing acetylene, ethylene, ethanol and ethylene glycol and coproducing hydrazine hydrate, benzene and derivatives of hydrazine hydrate and benzene by using CO or CO2

A technology of ethylene glycol and ethanol, which is applied in chemical instruments and methods, ether preparation, hydrocarbons, etc., and can solve problems such as carbon-carbon triple bond coupling that has not been seen

Inactive Publication Date: 2014-03-26
李坚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] In summary, the significant difference between TSRE coupling and traditional carbon-carbon coupling reactions is that CO 2 It mainly forms C=C double bond coupling, and CO mainly forms C≡C triple bond coupling, while the traditional carbon-carbon coupling is C-C single bond coupling, and there is no carbon-carbon triple bond coupling

Method used

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  • Method for preparing acetylene, ethylene, ethanol and ethylene glycol and coproducing hydrazine hydrate, benzene and derivatives of hydrazine hydrate and benzene by using CO or CO2
  • Method for preparing acetylene, ethylene, ethanol and ethylene glycol and coproducing hydrazine hydrate, benzene and derivatives of hydrazine hydrate and benzene by using CO or CO2
  • Method for preparing acetylene, ethylene, ethanol and ethylene glycol and coproducing hydrazine hydrate, benzene and derivatives of hydrazine hydrate and benzene by using CO or CO2

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Put 400g of 30% NaOH aqueous solution into the autoclave, start stirring, and slowly feed CO or its various flue gas at room temperature, or feed a mixture of equimolar CO and methane until the pressure of the reactor is 0.1-0.3MPa , keep warm for 5-50 minutes. The gas in the autoclave is collected as the acetylene product. The liquid phase in the autoclave is divided into two layers of oil and water, and the oil layer is separated into a mixture of benzene and its derivatives. The benzene product is separated by conventional distillation, and the conversion of CO and methane The yield is 98%, the yield of acetylene is 78%, and the yield of benzene and its derivatives is 19%.

Embodiment 2

[0056] Choose a conventional fixed-bed reactor with a diameter of 25mm. The fixed-bed filler is conventional calcium oxide or other super-alkaline solid catalyst particles. Use a pump to circulate 15% to 30% NaOH aqueous solution, and the liquid flows down from the top of the reactor. , come out from the bottom and return to the top, and use the external circulation cooling method to remove the heat. At room temperature, CO or its various flue gases or a mixture of equimolar CO and methane are slowly introduced from the bottom of the reactor. , the flow rate is controlled at 3-5g / min, and the acetylene gas flowing out from the top of the fixed-bed reactor is continuously collected by the conventional gas collection method, and the ventilation is stopped after 24 hours, and the oil-water liquid in the fixed-bed reactor is separated and separated The oil-out layer is a mixture of benzene and its derivatives. The conversion rate of CO and methane is 99%, the yield of acetylene is ...

Embodiment 3

[0058] Still select the fixed-bed reactor and packing thereof of the above-mentioned embodiment 2, but do not carry out external circulation with liquid NaOH. Directly feed a mixed gas of CO and methane from the bottom of the reactor at room temperature to a pressure of 0.1-0.3 MPa at the top of the reactor, and then use a gas flow pump to circulate the mixed gas for 1-24 hours to collect acetylene and ethylene at the top of the reactor. mixed gas, and recover the liquid benzene and its derivatives in the reactor. The conversion rate of CO and methane is 98%, the total yield of acetylene and ethylene is 86%, and the total yield of benzene and its derivatives is 12%.

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Abstract

The invention relates to a new technical route or technical approach for synthesizing acetylene, ethylene, ethanol and ethylene glycol and coproducing hydrazine hydrate, benzene and derivatives of hydrazine hydrate and benzene by using CO or CO2 according to a reaction which is derived from the rule of a synthetic reaction discovered recently: a tandem substitution rearrangement reaction (TSRE reaction for short) of elementary chemistry, namely the deoxygenation homocoupling reaction (TSRE coupling for short) of CO2 and CO; the technical route or technical approach can be used for directly synthesizing the products such as acetylene, ethylene, ethanol, ethylene glycol, hydrazine hydrate, benzene and so on with the CO or CO2 as the raw material; compared with the traditional technical route or technical approach for preparing the products, the technical route or technical approach provided by the invention does not require petroleum resources, and is mild in synthesis conditions, and is generally implemented under the conditions of low pressure and normal temperature; as a result, the preparation cost is reduced by more than 40% to 80%; no three wastes are generated in the preparation process; and therefore, the new technical route or technical approach is completely up to the standards of the clean production process and more suitable for the development of large-scale industrial and commercial techniques.

Description

[0001] The present invention relates to a new reaction derived from the rule of recently discovered synthetic reaction, namely, the tandem substitution rearrangement elimination reaction of element chemistry (TSRE reaction for short), namely CO 2 Deoxygenation self-coupling reaction with CO (TSRE coupling for short) to design a new CO or CO 2 The technical route or technical route of synthesizing acetylene, ethylene, ethanol, ethylene glycol products to co-produce hydrazine hydrate and benzene and their derivatives, by adopting such technical route or technical route, CO or CO 2 It is a raw material for the direct synthesis of acetylene, ethylene, ethanol, ethylene glycol, hydrazine hydrate, benzene and other products. Compared with the traditional technical route or technical route for preparing these products, it does not require petroleum resources, and the synthesis conditions are mild. Generally, it is selected at low pressure. Under normal temperature conditions, the prepa...

Claims

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Application Information

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IPC IPC(8): C07C11/24C07C15/04C07C1/10C07C2/88C07C11/04C07C1/32C01B21/16C07C31/20C07C31/08C07C29/36C07C33/035C07C33/025C07C29/159C07C43/16C07C43/178C07C41/09
Inventor 李坚
Owner 李坚
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