Device and method for preparing 1,3,5-trioxane continuously from concentrated formaldehyde as raw material
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 technology of trioxymethylene and concentrated formaldehyde, applied in the direction of organic chemistry, can solve problems such as environmental pollution, and achieve the effects of eliminating pollution, reducing energy consumption and simple operation.
Inactive Publication Date: 2017-05-31
苏州双湖化工技术有限公司
View PDF4 Cites 8 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
In the existing paraformaldehyde technology, most of them use the benzene extraction process, and the production equipment has caused serious pollution to the environment, which has a certain impact on the promotion of this technology
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 Construction
[0019] Such as figure 1 As shown (only the main equipment is drawn, other instruments, pumps, valves, intermediate tanks and other equipment have been omitted, and the structural representation will not affect the understanding and implementation of those skilled in the art), a kind of concentrated formaldehyde is used as raw material to continuously prepare trimer Formaldehyde plant, including reaction and concentration system, crystallization system and refining system.
[0020] Described reaction and enrichment system comprise paraformaldehyde reactor R1, concentration tower C2; The top outlet of paraformaldehyde reactor R1 links to each other with the central feed port of concentration tower C2, and concentration tower C2 tower top output outlet is connected with The feed port of the crystallization system J3 is connected, and the extraction outlet of the tower still of the concentration tower C2 is connected with the middle part reflux port of the paraformaldehyde 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 discloses a device and a method for preparing 1,3,5-trioxane continuously from concentrated formaldehyde as a raw material. The device comprises a reaction and concentration system, a crystallization system and a refining system. The reaction and concentration system is mainly used for preparing 1,3,5-trioxane from concentrated formaldehyde as the raw material through a reaction under the action of a catalyst and concentrating 1,3,5-trioxane into a 1,3,5-trioxane solution with the concentration of 63% through a concentrating tower; the crystallization system is mainly used for concentrating the 1,3,5-trioxane solution with the concentration of 63% into a 1,3,5-trioxane solution with the concentration of 93% through crystallization; the refining system is mainly used for refining the 1,3,5-trioxane solution with the concentration of 93% into a 1,3,5-trioxane solution with the concentration of 99.9%, and the 1,3,5-trioxane solution serving as an intermediate product is conveyed to other devices for use. Compared with a 1,3,5-trioxane preparing route adopting extraction, the device and the method have the advantages that the flow and the operation are simple, energy consumption is low, environmental pollution caused by benzene is reduced effectively, and the device and the method are quite suitable for large-scale industrial production.
Description
technical field [0001] The invention relates to a device and method for continuously preparing paraformaldehyde through a crystallization method. Background technique [0002] With the dwindling of oil resources and the increasing demand for fuel oil in various countries around the world, all countries have intensified their efforts in research and development of new energy sources. [0003] Polyoxymethylene dimethyl ether is a low-molecular-weight acetal polymer with methoxy as the main chain. It is a colorless liquid with a high boiling point. It can be used as a modifier, solvent, plasticizer and release agent for phenolic resins, etc. . At the same time, it is also a diesel oxygenator with excellent performance. Its physical properties are similar to those of diesel. It not only has a high cetane number, but also has a high oxygen content. When adding 15% to diesel, no Retrofitting the vehicle engine oil supply system can significantly improve the combustion characteri...
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