Compound polymerization inhibitor for styrene rectification
A technology of styrene and polymerization inhibitors, which is applied in the field of compounded polymerization inhibitors, can solve the problems of high dosage of compounded polymerization inhibitors, difficult to master the proportion, and low economic efficiency, etc., so as to achieve good polymerization inhibition effect and reduce Increased speed and liveliness
Active Publication Date: 2020-04-17
CNOOC TIANJIN CHEM RES & DESIGN INST +2
View PDF2 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the dosage of the composite type polymerization inhibitor is high, the economy is not strong, and its composition is complicated at the same time, and the ratio between the components is difficult to grasp. Therefore, it is necessary to develop a new type of styrene polymerization inhibitor with high efficiency, stability and low toxicity. Reduce monomer loss and improve production efficiency
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0022] The composition of the polymerization inhibitor is as follows:
[0023] 4-Carbonyl-2,2,6,6-tetramethylpiperidine nitroxide: 10%
[0024] 3-Chloro-2,4-ditrifluoromethylthiophenol: 1%
[0025] Ethylbenzene: 89%
Embodiment 2
[0027] The composition of the polymerization inhibitor is as follows:
[0028] 4-Carbonyl-2,2,6,6-tetramethylpiperidine nitroxide: 20%
[0029] 3-Chloro-2,4-ditrifluoromethylthiophenol: 10%
[0030] Ethylbenzene: 70%
Embodiment 3
[0032] The composition of the polymerization inhibitor is as follows:
[0033] 4-Carbonyl-2,2,6,6-tetramethylpiperidine nitroxide: 30%
[0034] 3-Chloro-2,4-ditrifluoromethylthiophenol: 15%
[0035] Ethylbenzene: 55%
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
| Property | Measurement | Unit |
|---|---|---|
| percent by mass | aaaaa | aaaaa |
| percent by mass | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a compound polymerization inhibitor for styrene rectification, wherein the compound polymerization inhibitor is prepared from a nitroxide free radical compound, 2,4-ditrifluoromethyl thiophenol halide and a solvent. According to the invention, by utilizing the synergistic effect of all the components, the compound polymerization inhibitor remarkably improves the polymerization inhibition effect, reduces the tar discharge amount of a styrene device, improves the production capacity of a styrene rectification device, reduces the toxicity of the polymerization inhibitor and is environment-friendly.
Description
technical field [0001] The invention belongs to the field of chemical auxiliaries, and relates to a compound polymerization inhibitor suitable for a styrene rectification process. Background technique [0002] Styrene is the basic product of petrochemical industry and an important raw material for synthetic polymers. Styrene has the property of thermal polymerization, that is, the temperature can initiate its polymerization, and the higher the temperature, the faster the polymerization rate. Industrially, ethylbenzene is mainly produced by gas-phase catalytic dehydrogenation of ethylbenzene. The mixed liquid after dehydrogenation of ethylbenzene is sent to a rectifying tower for rectification and separation. The temperature of this process is high, so the loss of styrene is very serious. The resulting polymer will also block the equipment and pipelines of the next process and affect the normal progress of industrial production. Therefore, a polymerization inhibitor must be ...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/20C07C15/46C07C7/04
CPCC07C7/20C07C7/04C07C15/46Y02P20/10
Inventor 赵甲林亚祥徐彬宋滔张春丽黄占凯于海斌
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.
