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Method for improving stability of 1-methybrom

A technology for bromopropane and stability, applied in the field of improving the stability of 1-bromopropane, can solve problems such as structural instability, and achieve the effects of preventing air oxidation, avoiding decomposition and discoloration, and improving stability

Active Publication Date: 2009-02-18
TIANJIN CHANGLU HAIJING GRP CO LTD
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Problems solved by technology

[0003] In the molecular structure of 1-bromopropane, due to the strong electronegativity of the bromine atom, the hydrogen atoms on the adjacent carbon atoms are positively charged, and this structure is very unstable.

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  • Method for improving stability of 1-methybrom
  • Method for improving stability of 1-methybrom

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Embodiment Construction

[0012] The basic principle of the present invention is that the discoloration of 1-bromopropane is mainly because it is oxidized by oxygen in the air or cracked under the action of light (especially ultraviolet light), resulting in unstable alkyl radicals.

[0013] The method for improving 1-bromopropane product stability of the present invention, its method step is realized like this:

[0014] ①. Fill the packaging container of the 1-bromopropane product with nitrogen to replace the air to prevent the 1-bromopropane product from being oxidized;

[0015] 2., in the container through step 1., load 1-bromopropane product;

[0016] 3., add the two (2,2,6,6-tetramethylpyridyl) sebacates of 1~5‰ of its quality in the gained 1-bromopropane product through step 2., reach and avoid 1-bromopropane product Break down the purpose of discoloration.

[0017] The use process of the stabilizer for improving the stability of 1-bromopropane of the present invention will be described in conju...

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Abstract

The invention provides a method of improving the stability for 1-bromopropane. The method comprises: (1) filling the package vessel of the 1-bromopropane product with nitrogen; replacing air; preventing the 1-bromopropane product from oxygenation; (2) filling the vessel of step one with the 1-bromopropane product; (3) filling the 1-bromopropane product which is obtained from step two with ethylhexyl sebate (2,2,6,6-tetramethyl pyridyl) which is 1 to 5 thousandths of the quality thereof in order to prevent the 1-bromopropane product from decomposition and discoloration. The invention can isolate air and prevent the 1-bromopropane product from oxygenation. Alkyl radical can be captured effectively. The 1-bromopropane product is prevented from decomposition and discoloration. The stability of the 1-bromopropane product can be improved.

Description

technical field [0001] The invention relates to a method for improving the stability of 1-bromopropane. Background technique [0002] 1-Bromopropane is a colorless transparent liquid and is an important chemical raw material. The 1-bromopropane product is unstable and easily changes color in the presence of oxygen or light. To analyze the reasons for the discoloration of 1-bromopropane, (1) it is oxidized by oxygen in the air; (2) the bond energies of C—C, C—H, and C—Br in the 1-bromopropane molecule are not high, and they are exposed to light (especially It is easy to undergo cracking reaction under the action of ultraviolet light, which will change the color of 1-bromopropane. [0003] In the molecular structure of 1-bromopropane, due to the strong electronegativity of the bromine atom, the hydrogen atom on the adjacent carbon atom has a positive charge, and this structure is very unstable. When the active bromine atom interacts with the C—Br bond of other 1-bromopropan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C19/075C07C17/42
Inventor 魏炳举李萌张金娜张心禄
Owner TIANJIN CHANGLU HAIJING GRP CO LTD
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