A kind of production method of pyrrolidone products

A technology for pyrrolidone and its production method, which is applied in the production field of pyrrolidone products, can solve problems such as increased yield, short process, and long process, and achieve the effects of shortened production process, reduced process energy consumption, and easy operation and control

Active Publication Date: 2017-12-22
MAIQI CHEM CO LTD
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Based on the problems existing in the above-mentioned prior art, the present invention provides a production method of pyrrolidone products, which has low energy consumption, high yield and short process, which overcomes the difficulties faced in the production of existing pyrrolidone products: relatively high energy consumption High, the yield needs to be improved, and the process is long, etc.,

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
  • A kind of production method of pyrrolidone products
  • A kind of production method of pyrrolidone products
  • A kind of production method of pyrrolidone products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The present embodiment is a production method of pyrrolidone products, comprising:

[0035] Raw materials: 1,4-butanediol (99.9wt%, produced by Xinjiang Meike Chemical Industry Co., Ltd.) and ammonia water (25%) respectively enter the mixer through the metering pump according to the molar ratio of 1:1.5, and are preheated by the preheater E-101 To 195°C, a well-insulated tubular reactor R101 (inner diameter 300mm), filled with a catalyst containing 50wt% Cu@1.5wt% CaO-3wt% BaO-10wt% ZnO-30wt% SiO 2 (No. BIPT-NMP-011), the balance is crystal water, spherical (particle size 2mm), the filling volume is 100L, the feeding volume is 80L / h, the temperature measurement display value in the reactor is 195~198℃, indicating that the temperature distribution is uniform , Pressure back pressure control 3.0MPa. The product exported from R101 is pumped into the preheater E102 through the liquid level controller to adjust the metering pump in the buffer tank V101. The sampling and ana...

Embodiment 2

[0043] The present embodiment is a production method of pyrrolidone products, comprising:

[0044] Raw materials: 1,4-butanediol (99.9wt%, produced by Xinjiang Meike Chemical Industry Co., Ltd.) and monomethylamine aqueous solution (37%) respectively enter the mixer through the metering pump according to the molar ratio of 1:2.0, and pass through the preheater E- 101 is preheated to 205 ° C, a slurry bed reactor R101 (effective volume 50L, 30LNMP is installed inside at the beginning of the reaction), and the internal catalyst is 25wt% Cu@5wt% ZrO 2 -3wt%BaO-40wt%SiO 2 (No. BIPT-NMP-021), the balance is crystal water, powder (average particle size 80 microns), the filling volume is 2L, the feeding volume is 3L / h, the temperature measurement display value in the reactor is 202~205℃, the pressure Back pressure control 3.8MPa. The product exported from R101 is pumped into the preheater E102 through the liquid level controller to adjust the metering pump in the buffer tank V101. ...

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

PropertyMeasurementUnit
boiling pointaaaaaaaaaa
densityaaaaaaaaaa
refractive indexaaaaaaaaaa
Login to view more

Abstract

The invention discloses a production method of pyrrolidone products. The method includes the steps that 1,4-butanediol serves as the raw material for conducting a one-step reaction, pyrrolidone is directly produced, 1,4-butanediol is converted into the pyrrolidone series products in a reaction unit through a dehydrogenation-amination reaction in the modes of a stagewise reactor and composite catalysts, such as, alpha-pyrrolidone or N-methyl pyrrolidone or N-ethyl pyrrolidone. According to the production method, the 1,4-butanediol is dehydrogenized into gamma-butyrolactone, gamma-butyrolactone is converted into pyrrolidone in an amination mode, the gamma-butyrolactone and the pyrrolidone are coupled into the same reactor, the separation and refining steps in a traditional process are omitted, energy consumption is saved, heat emitted by amination is fully utilized, the production method is easy to conduct, the yield is raised compared with a traditional process, and the production method is more environmentally friendly.

Description

technical field [0001] The invention belongs to the field of preparation of fine chemical products, and relates to a production method of pyrrolidone products. Background technique [0002] Piperidine products are a class of fine chemical products widely used in the fields of medicine, pesticides, plastic additives, organic catalysts, curing agents, solvents, etc., especially because they have high biological activity and have a good market prospect. The currently described piperidine products include: piperidine, 3-methylpiperidine, 4-methylpiperidine, 2-methylpiperidine, 2,4-dimethylpiperidine, 3,5-dimethyl Basepiperidine, 2,2,6,6-tetramethylpiperidine, 2,6-dimethylpiperidine. The following is the introduction of some products: [0003] Pyrrolidone is an important class of organic compounds, and its general molecular formula is as follows: [0004] [0005] In the above molecular formula, R is H, CH 3 、C n h 2n+1 One of them, its main products are α-pyrrolidone, N...

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
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C07D207/267
CPCC07D207/267
Inventor 黄龙张凤渊宋国全肖强冀德坤高帅
Owner MAIQI CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap