Micro-interface preparation system and method of 1, 4-butanediol
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A preparation system, butanediol technology, applied in the field of butanediol production, can solve the problems of catalyst waste, increase of production cost, uniform mixing of hydrogen, etc., to increase the mass transfer area of phase boundary, reduce temperature and pressure, and improve reaction efficiency effect
Pending Publication Date: 2022-05-17
NANJING YANCHANG REACTION TECH RES INST CO LTD
View PDF12 Cites 1 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0008] 1. In order to promote the reaction in the hydrogenation section, manufacturers will increase the amount of catalyst, which increases the production cost
[0009] 2. Due to the increase in the amount of catalyst in the hydrogenation section, incomplete catalyst reaction often occurs, and the remaining catalyst is wasted, and after entering the follow-up system, it will affect the normal production of the follow-up system
[0010] 3. During the mixing process of hydrogen and slurry, there will still be a dead angle of stirring, and there will still be problems of uneven stirring between hydrogen, catalyst and slurry, resulting in insufficient reaction in the hydrogenation section and affecting the output of 1,4-butanediol
[0011] 4. Stirring cannot break or completely break the hydrogen bubbles, and the hydrogen cannot be mixed evenly with the slurry
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0059] refer to figure 1 Shown is a schematic structural view of the micro-interface preparation system for 1,4-butanediol provided by the present invention, which includes a mixing tank 10, a heat exchanger 20, a monoesterification reactor 30, a diesterification reactor 40, and a Hydrogen reactor 50 , flash tower 60 , methanol rectification tower 70 , dimethyl maleate rectification tower 80 and 1,4-butanediol rectification tower 90 .
[0060] Methanol is transported to the mixing tank 10 through the feed pump 11 and the methanol feed pipeline 13, and the maleic anhydride is transported to the mixing tank 10 through the maleic anhydride feed pipeline 12. In the mixing tank 10, methanol and maleic anhydride are fully mixed, and then the mixed materials It is sent to the heat exchanger 20, one end of the heat exchanger 20 delivers low-pressure steam, and the other end discharges the process water after heat exchange. The mixed material heated to 75° C. is sent to the monoesteri...
Embodiment 2
[0069] Other operating steps are the same as in Example 1, the only difference is that there is only a pneumatic micro-interface generator inside the hydrogenation reactor.
Embodiment 3
[0071] Other operating steps are the same as in Example 1, the only difference is that there is only a hydraulic micro-interface generator inside the hydrogenation reactor.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention provides a micro-interface preparation system of 1, 4-butanediol, which comprises a mixing tank, the mixing tank is connected with a methanol feeding pipeline and a maleic anhydride feeding pipeline, and the mixing tank is sequentially connected with a heat exchanger, a single esterification reactor, a double esterification reactor, a hydrogenation reactor, a flash tower, a methanol rectifying tower, a dimethyl maleate rectifying tower and a 1, 4-butanediol rectifying tower. A product outlet is formed in the 1, 4-butanediol rectifying tower, a gas-liquid linkage type micro-interface generator is arranged in the hydrogenation reactor, and the gas-liquid linkage type micro-interface generator is connected with a hydrogen inlet pipeline and a circulating pump. Hydrogen is dispersed and broken into hydrogen microbubbles through the gas-liquid linkage type micro-interface generator, the gas-liquid two-phase mass transfer area is increased, and due to the fact that the gas-liquid linkage type micro-interface generator has the circulating stirring function, the hydrogen can better react with mixed liquid in the hydrogenation reaction process, and the hydrogenation reaction is more sufficient.
Description
technical field [0001] The invention belongs to the technical field of butanediol production, and in particular relates to a micro-interface preparation system of 1,4-butanediol. Background technique [0002] 1,4-butanediol is one of the methanol series product chains, and is an important basic organic chemical and fine chemical raw material. In the process of producing 1,4-butanediol, manufacturers generally do not use 1,4 - Butanediol is the final product, but focus on the extension of 1,4-butanediol derivatives, 1,4-butanediol derivatives are fine chemical products with high added value, widely used as solvents, medicines, cosmetics , plasticizers, curing agents, pesticides, herbicides, foamed artificial leather, fibers and engineering plastics, etc.; due to the wide range of uses and large amounts of 1,4-butanediol products, the 1,4-butanediol Production technology needs to be continuously improved. [0003] The production methods of 1,4-butanediol mainly include: (1) ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more