Constant-pressure alcohol-ether hydrazine production process

A production process, the technology of hydrazine, applied in the production process of ether hydrazine and the field of pressing alcohol, can solve the problems of energy consumption, material consumption, low synthesis rate, large amount of released gas, etc., and achieve flexible adjustment, reasonable flow direction, Overcome the effect of low synthesis rate

Inactive Publication Date: 2009-12-16
FUZHOU UNIV +1
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Problems solved by technology

However, for the production of methanol and/or dimethyl ether under the low pressure of pressurized gasification of coal-water slurry, the s

Method used

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  • Constant-pressure alcohol-ether hydrazine production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] refer to figure 1 , the semi-water gas with a pressure of 5.5MPa obtained from coal-water slurry plus oxygen pressurized gasification undergoes rough desulfurization, transformation, decarburization 1, and fine desulfurization, then joins the deoiled circulating gas and enters the gas preheater, and synthesizes The hot synthesis gas coming out of the bottom of the tower is heat exchanged in countercurrent, heated to 200-220°C, enters the annulus of the catalyst frame from the bottom of the synthesis tower, and radially enters the catalyst layer between the tubes from the circumferential direction. At 225-255°C, hydrogen and carbon monoxide, Carbon dioxide reacts to form methanol and water. After the reaction, the gas converges in the central gas collecting pipe (temperature is 230-280°C) and then exits the synthesis tower. The gas enters the shell side of the intermediate heat exchanger and exchanges heat with the gas entering the tower. The temperature drops to 78-85°C...

Embodiment 2

[0029] The process of Example 1 was repeated, except that the methanol synthesis part was changed to dimethyl ether synthesis. The dimethyl ether synthesis catalyst used is a copper-based composite catalyst, the reaction temperature is 268° C., and the reaction pressure is 5.0 MPa. Part of the gas after separation of dimethyl ether enters the cycler as a cycle gas, and the other part is sent to the "deep shift" process to convert the CO contained in this part of the tail gas into H 2 and CO 2 , and then into decarburization 2, the contained CO 2 Removal, the residual trace CO in the secondary decarburization gas enters the PSA system and is completely removed. In this way, the purified gas is added with an appropriate amount of pure nitrogen from the nitrogen production process, and the hydrogen-nitrogen ratio of the gas is adjusted to 3, and then synthesized with ammonia. Meet and send to the ammonia synthesis tower, the ammonia synthesis pressure is 5.0MPa, and the space v...

Embodiment 3

[0033] Repeat the process of Example 1, just change the methanol synthesis part into gas-phase fixed bed F-T synthesis, the process pressure is 5.0MPa, the catalyst layer operating temperature is 200 ~ 250 ° C, H 2 / CO ratio is 2.0, airspeed is 10000h -1 . The ammonia synthesis conditions and the adjusted gas composition at the inlet and outlet of the ammonia synthesis tower are the same as in Example 1.

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Abstract

The invention provides a constant-pressure alcohol-ether hydrazine production process with a competitive replacement choice, which solves the disadvantages of an alcohol-combining process in the prior art. The total pressure of a system in the invention is under low water-coal-slurry gasification pressure between 3.5 and 8 MPa, and no feed-gas compressor is needed. Two chemical engineering processes, namely alcohol-ether synthesis and ammonia synthesis, are serially connected into a production line, wherein alcohol-ether synthesis is performed first, and then ammonia synthesis is performed, but alcohol-ether synthesis and ammonia synthesis are relatively independent of the separation of respective products thereof. The yield proportion of CO/H2 products needed by different reaction is flexible to regulate. The process does not need to provide additional power for feed gas, and can flexibly and reasonably regulate feed gas components of each synthesis procedure in the system, thereby improving the efficiency of the whole process and reducing production cost to the utmost extent.

Description

technical field [0001] The invention belongs to the technical field of synthesis alcohol, ether and ammonia synthesis, and more specifically relates to an isobaric alcohol and ether hydrazine production process. Background technique [0002] The pressurized gasification of coal-water slurry to produce methanol and / or dimethyl ether has the advantages of low energy consumption, wide application range of coal types, less harmful gas emissions, and high-quality methanol products. However, for the production of methanol and / or dimethyl ether under the pressure gasification of coal-water slurry under low pressure, the synthesis rate is generally low, the amount of released gas is large, and its energy consumption and material consumption are not very ideal. For this reason, it is necessary to solve the shortcomings of the coal-water slurry pressurized gasification to produce syngas to produce methanol. Contents of the invention [0003] The purpose of the present invention is ...

Claims

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Application Information

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IPC IPC(8): C07C27/20C07C29/16C07C41/01C07C31/04C07C43/04C01C1/04
Inventor 王榕魏可镁林建新倪军林炳裕莫崇望瞿胜
Owner FUZHOU UNIV
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