Refrigeration cycle system and method used in process of preparing C5 aldehyde through hydroformylation of mixed C4 olefins

A carbon tetraolefin hydroformyl and circulation system technology, which is applied in the production of carbon monoxide reaction, separation/purification of carbonyl compounds, organic chemistry, etc., can solve the problems of high energy consumption and other issues

Pending Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The traditional refrigeration method is compression refrigeration, which uses external power to compress refrigeration, which consumes a lot of energy

Method used

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  • Refrigeration cycle system and method used in process of preparing C5 aldehyde through hydroformylation of mixed C4 olefins
  • Refrigeration cycle system and method used in process of preparing C5 aldehyde through hydroformylation of mixed C4 olefins
  • Refrigeration cycle system and method used in process of preparing C5 aldehyde through hydroformylation of mixed C4 olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] In this embodiment, use such as Figure 5 In the shown refrigeration cycle system, the flow rate of the ammonia-water working fluid infusion pump of the refrigerator is 13.9kg / hr (ammonia mass content 0.50) for the first-stage absorption refrigeration subsystem and 10.0kg / hr (ammonia) for the second-stage absorption refrigeration system. The mass content is 0.375). In the first-stage absorption refrigeration subsystem method, the high temperature level is 86.1℃ (the first-stage heat exchanger 2 ammonia side of the hydroformylation reactor), and the intermediate temperature is 40.0℃ (the first-stage absorber 20 and the first The high-pressure section pressure is 15.3 bar, and the low-pressure section pressure is 6.1 bar. In the second-stage absorption refrigeration system method, the high temperature is 86.3℃ (the second-stage heat exchanger 15 ammonia side of the hydroformylation reactor), and the middle temperature is 19.9℃ (the second-stage distillation condenser 9 se...

Embodiment 2

[0089] In this embodiment, use such as Figure 5 In the refrigeration cycle system shown, the flow rate of the refrigerating machine ammonia-water working medium infusion pump is 13.9kg / hr (ammonia mass content 0.45) for the first-stage absorption refrigeration subsystem and 10.0kg / hr (ammonia) for the second-stage absorption refrigeration system. The mass content is 0.312). In the first-stage absorption refrigeration subsystem method, the high temperature is 96.2℃ (the first-stage heat exchanger 2 ammonia side of the hydroformylation reactor), and the intermediate temperature is 40.0℃ (the first-stage absorber 20 and the first The high-pressure section pressure is 15.3 bar, and the low-pressure section pressure is 5.0 bar. In the second-stage absorption refrigeration system method, the high temperature is 96.1℃ (the second-stage heat exchanger 15 ammonia side of the hydroformylation reactor), and the middle temperature is 15.0℃ (the second-stage distillation condenser 9 secon...

Embodiment 3

[0092] In this embodiment, use such as Figure 5 As shown in the refrigeration cycle system, the flow rate of the refrigerating machine ammonia-water working medium infusion pump is 13.9kg / hr (ammonia mass content 0.56) for the first-stage absorption refrigeration subsystem and 10.0kg / hr (ammonia The mass content is 0.45). In the first-stage absorption refrigeration subsystem method, the high temperature level is 76.0℃ (the first-stage heat exchanger 2 ammonia side of the hydroformylation reactor), and the intermediate temperature is 40.0℃ (the first-stage absorber 20 and the first The high-pressure section pressure is 15.3bar and the low-pressure section pressure is 7.2bar. In the second-stage absorption refrigeration system method, the high temperature level is 76.6°C (the second-stage heat exchanger 15 ammonia side of the hydroformylation reactor), and the middle temperature is 25.2°C (the second-stage distillation condenser 9 second-stage Side) and 40.0°C (the second-stag...

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Abstract

The invention relates to a refrigeration cycle system used in the process of preparing C5 aldehyde through mixed C4 olefin hydroformylation. The refrigeration cycle system comprises a second-stage absorption refrigeration system and an olefin hydroformylation reaction subsystem; preferably, the refrigeration cycle system further comprises a first-stage absorption refrigeration subsystem. The invention further relates to a method for energy-saving heat exchange in the process of preparing C5 aldehyde through hydroformylation of mixed C4 olefins, and the refrigeration cycle system is adopted inthe method. According to the method, an effective refrigeration process flow is adopted, heat released by hydroformylation reaction at 70-110 DEG C is converted into cold energy at 10 to -15 DEG C, and the required cold energy is provided for separating mixed olefins and alkanes from an aldehyde product in rectification operation. By enhancing the internal energy coupling of the system, the operation energy consumption of the system is reduced, and the overall energy utilization efficiency of the device is effectively improved.

Description

Technical field [0001] The invention belongs to the technical field of energy saving in petrochemical industry, and specifically relates to a refrigeration cycle system and method used in the process of preparing carbon pentaaldehyde by hydroformylation of mixed carbon four olefins. Background technique [0002] Various processes for the hydroformylation of low-carbon olefins have been reviewed in the literature at home and abroad, such as the "Technology for Low-Carbon Olefins Low-Pressure Oxo Synthesis Process" published in "Petrochemical Industry", Volume 38, No. 5, 2009 "Progress", 2008 Tianjin University School of Chemical Engineering Zhang Benling's master's thesis "Simulation and research on the process of oxo synthesis of butyraldehyde and propionaldehyde", and "Process analysis of oxo synthesis from butyraldehyde to valeraldehyde" published in the 2013 supplement of "Progress in Chemical Industry" ". [0003] The current industrial hydroformylation reaction of C2 to C4 lo...

Claims

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Application Information

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IPC IPC(8): C07C45/50C07C45/82C07C47/02
CPCC07C45/50C07C45/82C07C47/02Y02P20/584Y02P20/10
Inventor 包天舒
Owner CHINA PETROLEUM & CHEM CORP
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