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Strengthening system and process for preparing 1, 4-butanediol through allyl alcohol hydrogenation

A technology for preparing allyl alcohol and hydrogen, applied in the field of strengthening systems, can solve problems such as inconvenience, difficulty in greatly improving the reaction rate, and influence

Pending Publication Date: 2021-03-09
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these devices all adopt traditional reaction methods, and it is difficult to increase the reaction rate too much, which affects the upgrading of the preparation process of 1,4-butanediol
[0004] In summary, there are obviously inconveniences and defects in the actual use of the existing technology, so it is necessary to improve

Method used

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  • Strengthening system and process for preparing 1, 4-butanediol through allyl alcohol hydrogenation
  • Strengthening system and process for preparing 1, 4-butanediol through allyl alcohol hydrogenation
  • Strengthening system and process for preparing 1, 4-butanediol through allyl alcohol hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] The reaction temperature of the primary hydrogenation reaction is: 55° C., the reaction pressure is: 0.05 MPa; the catalyst is triphenylphosphine complexed rhodium; the selectivity of γ-hydroxybutanol is: 82%.

[0112] Before the secondary hydrogenation, γ-hydroxybutanol and hydrogen enter the micro interface generator 3 for micronization treatment;

[0113] The reaction temperature of the secondary hydrogenation reaction is: 85°C; the catalyst is Wright's nickel; the selectivity of 1,4-butanediol is: 80%.

Embodiment 2

[0115] The reaction temperature of the primary hydrogenation reaction is: 70° C., the reaction pressure is: 0.5 MPa; the catalyst is triphenylphosphine complexed rhodium; the selectivity of γ-hydroxybutanol is: 75%.

[0116] Before the secondary hydrogenation, γ-hydroxybutanol and hydrogen enter the micro interface generator 3 for micronization treatment;

[0117] The reaction temperature of the secondary hydrogenation reaction is: 100°C; the catalyst is Wright's nickel; the selectivity of 1,4-butanediol is: 76%.

Embodiment 3

[0119] The reaction temperature of the primary hydrogenation reaction is: 65°C, the reaction pressure is: 0.4MPa; the catalyst is triphenylphosphine complexed rhodium; the selectivity of γ-hydroxybutanol is 78:%.

[0120] Before the secondary hydrogenation, γ-hydroxybutanol and hydrogen enter the micro interface generator 3 for micronization treatment;

[0121] The reaction temperature of the secondary hydrogenation reaction is: 95°C; the catalyst is Wright's nickel; the selectivity of 1,4-butanediol is: 75%.

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Abstract

The invention relates to the field of 1, 4-butanediol preparation, and provides a strengthening system for preparing 1, 4-butanediol through allyl alcohol hydrogenation, which comprises a primary hydrogenation reaction kettle, a secondary hydrogenation reaction kettle, a product separation mechanism and a micro-interface generator, the micro-interface generator comprises an interface generating mechanism and an interface crushing mechanism. Therefore, the product separation mechanism and the micro-interface generator are arranged between the two stages of hydrogenation reaction kettles; the separation purity of effective components is improved, premixing of the effective components and reaction gas is achieved, and bubbles formed by the reaction gas in the effective components are broken into micron-sized bubbles; and reaction efficiency is improved. The operation parameters of the strengthening system are automatically detected in an artificial intelligence mode, and adjustment is conducted in time according to changes of the parameters to maintain normal operation of the system. The automation degree and the operation stability of the system are improved. The invention also provides a preparation process of the 1, 4-butanediol based on the strengthening system.

Description

technical field [0001] The invention belongs to the technical field of 1,4-butanediol preparation, in particular to an intensified system for preparing 1,4-butanediol by hydrogenation of allyl alcohol. Background technique [0002] 1,4-Butanediol (BDO for short) is an important organic and fine chemical raw material, which is widely used in the fields of medicine, chemical industry, textile, papermaking, automobile and daily chemical industry. BDO can produce tetrahydrofuran (THF), polybutylene terephthalate (PBT), γ-butyrolactone (GBL) and polyurethane resin (PU Resin), coatings and plasticizers, as well as solvents and electroplating Brighteners in the industry, etc. [0003] At present, there are many kinds of hydrogenation reaction equipment, such as patent numbers CN201493100U, CN204973910U and CN205586965U, all of which disclose hydrogenation reaction devices. However, these devices all adopt traditional reaction methods, and the reaction rate is difficult to be grea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/56C07C31/20
CPCC07C29/36C07C29/56C07C31/207
Inventor 张志炳周政孟为民王宝荣杨高东罗华勋张锋李磊杨国强田洪舟曹宇
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD
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