Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Stirring grinding reactor and method thereof for preparation of isocyanate

A reactor and stirring shaft technology, which is applied in the field of preparing isocyanate reactors based on high-temperature salt-forming phosgenation reaction, can solve the problems of long photochemical process time, low salt-forming concentration, and many side reactions, so as to reduce wrapping and improve Mass transfer rate, the effect of reducing energy consumption

Active Publication Date: 2015-12-09
WANHUA CHEM GRP CO LTD
View PDF7 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a kind of stirring grinding reactor, another purpose of the present invention is to provide a kind of method for preparing isocyanate monomer by high-temperature salt-forming phosgenation method, can solve the common formation in the existing salt-forming phosgenation reaction Low salt concentration, hydrochloride agglomeration and diamine encapsulation caused by agglomeration make it difficult for internal materials to participate in the photochemical reaction in the next stage, resulting in a long photochemical process and the generation of urea impurities, resulting in many side reactions and excessive yield Low technical problems, especially the ability to process diamines with high melting points for high-temperature salification, so that the hydrochloride can undergo phosgenation reaction at a high concentration to obtain qualified isocyanate

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
  • Stirring grinding reactor and method thereof for preparation of isocyanate
  • Stirring grinding reactor and method thereof for preparation of isocyanate
  • Stirring grinding reactor and method thereof for preparation of isocyanate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] use attached figure 1 In the process shown, the volume of the salt-forming reactor is 500L, and there are 12 groups of dynamic and static rotating discs in total, 7 groups at the upper part of the feeding port, and 5 groups at the lower part of the feeding port. The lowermost end of each static rotating disc is located below the static rotating disc And the axial distance of the uppermost end of the moving rotating piece of the bell is the same as 50mm, the feed inlet is located above the distributor in the middle of the reactor, the axial distance between the lowermost end of the feed inlet and the uppermost end of the distributor is 150mm, and the lower part of the distributor It is a moving rotating piece, the axial distance between the lowermost end of the distributor and the uppermost end of the moving rotating piece is 80 mm, and the outlet is located at the bottom of the reactor. The moving rotating piece is a solid circular cake-shaped structure with an angle b...

Embodiment 2

[0067] use attached figure 1In the process shown, the volume of the salt-forming reactor is 500L, and there are 7 sets of dynamic and static rotating plates in it, 4 sets at the upper part of the feed inlet, and 3 sets at the lower part of the feeding port. The lowermost end of each static rotating plate is located below the static rotating plate And the axial distance between the uppermost ends of the adjacent movable rotating plates is the same as 200mm, the feed inlet is located above the distributor in the middle of the reactor, the axial distance between the lowermost end of the feed inlet and the uppermost end of the distributor is 80mm, and the lower part of the distributor It is a movable rotating piece, the axial distance between the lowermost end of the distributor and the uppermost end of the moving rotating piece is 50 mm, and the outlet is located at the bottom of the reactor. The moving rotating piece is a solid circular cake-shaped structure with an angle betwe...

Embodiment 3

[0070] Use attached figure 1 In the process shown, the volume of the salt-forming reactor is 500L, and there are 10 groups of dynamic and static rotating discs inside, 6 groups at the upper part of the feeding port, and 4 groups at the lower part of the feeding port. The lowermost end of each static rotating disc is located below the static rotating disc And the axial distance between the uppermost ends of the adjacent movable rotating plates is the same as 100mm, the feed inlet is located above the distributor in the middle of the reactor, the axial distance between the lowermost end of the feed inlet and the uppermost end of the distributor is 150mm, and the lower part of the distributor It is a movable rotating piece, the axial distance between the lowermost end of the distributor and the uppermost end of the moving rotating piece is 50 mm, and the outlet is located at the bottom of the reactor. The moving rotating piece is a solid circular cake-shaped structure with an an...

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
Number average particle sizeaaaaaaaaaa
Number average particle sizeaaaaaaaaaa
Number average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a stirring grinding reactor and a method thereof for preparation of isocyanate. The reactor is provided with dynamic rotation slices and static rotation slices in a mutual spacing manner; the dynamic rotating slices and the static rotation slices are provided with channel holes, the dynamic rotation slices each have a saucer-shaped structure having a serrated surface, and the static rotation slices have the structure complementary with that of the dynamic rotation slices. A special stirring structure of the reaction kettle can avoid hydrochloride caking, and increases the salifying concentration and the diamine conversion rate. A gas-liquid reaction effect is strengthened, the temperature control of the system is stable, obtained hydrochloride granules are exquisite, the reaction time can be shortened during a liquid phase phosgenation reaction, the product yield is improved, at the same time, blocking of salifying equipment can be reduced, the equipment can be allowed to perform long-term stable running, the equipment structure is concise, and large-scale industrialized application is convenient.

Description

technical field [0001] The invention relates to a stirring and grinding reactor and a method for preparing isocyanate by using the reactor, in particular to a reactor and a method for preparing isocyanate based on high-temperature salt-forming phosgenation reaction. Background technique [0002] In the prior art, the phosgene method of preparing isocyanates by reacting organic primary amines with phosgene in an inert solvent is well known. The phosgene method can be divided into a direct method and a salt-forming method. The direct method is to prepare the corresponding isocyanate by directly reacting primary amine and phosgene; An amine salt, and then reacting the amine salt with phosgene can effectively inhibit the production of urea by-products in the photochemical process. [0003] British patent GB1086782A uses the method of salt-forming phosgenation to prepare xylylene diisocyanate. Diamine and hydrogen chloride form a salt at 0-60°C, and hydrochloride phosgenation is...

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
IPC IPC(8): B01J10/00B01J19/18C07C263/10C07C265/14
Inventor 韩金平尚永华李建峰史培猛黎源华卫琦
Owner WANHUA CHEM GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com