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Multi-level continuous polyaniline synthesis process

A synthesis process, polyaniline technology, applied in the field of polyaniline continuous synthesis process, can solve the problems of restricting tubular reactors, polyaniline chain breaking, uniform mixing, etc., and achieve the effect of mass transfer and heat transfer

Active Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ratio of the heat transfer surface area to the reaction volume limits the size of the tubular reactor. In a reactor with a small inner diameter, the polyaniline particles produced by the reaction will have a certain impact on the mass transfer of the entire reaction system, and even appear adhesion. the occurrence of the situation
[0008] At present, the following problems exist in the synthesis of polyaniline: A large number of The oxidizing agent and aniline monomer are added at the same time, and cannot be mixed quickly and uniformly, resulting in partial over-oxidation during the polymerization process, resulting in chain scission of polyaniline, which leads to a decrease in the yield of polyaniline; Because the heat of reaction in the reactor cannot be removed in time, the local temperature is too high, resulting in a wide molecular weight distribution of polyaniline

Method used

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  • Multi-level continuous polyaniline synthesis process

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Effect test

Embodiment 1

[0023] Continuously drop sulfuric acid and aniline into the multi-stage series reactors with a constant flow pump, the flow rate of aniline is 0.547L / h, and 15% ammonium persulfate solution is added into the reactor in three stages with a constant flow pump, and the flow rate is as follows: 4.564L / h, 2.7384L / h, 1.825.6L / min, the reaction temperature is controlled at around 0°C. After the reaction product was washed with water, washed with acetone, and dried in vacuum, the yield of polyaniline was 80%, and the number average molecular weight was 1.8×10 4 , the molecular weight distribution value is 1.8, and the diameter of polyaniline particles is not greater than 25 μm. After doping with sulfuric acid, the conductivity is 10S cm -1 .

Embodiment 2

[0025] Continuously drop β-naphthalenesulfonic acid and aniline into the multi-stage series reactor with a constant flow pump, the flow rate of aniline is 0.547L / h, and 25% ammonium persulfate solution is added into the reactor in four stages with a constant flow pump , the flow rate is 2.1907L / h, 1.643L / h, 1.0954L / h, 0.5477L / h in turn, and the reaction temperature is controlled at about 5°C. After the reaction product was washed with water, washed with acetone, and dried in vacuum, the yield of polyaniline was 82%, and the conductivity was 10S cm -1 , number average molecular weight 2.3×10 4 , the molecular weight distribution value is 2.1, and the diameter of polyaniline particles is not greater than 25 μm.

Embodiment 3

[0027] Dodecylbenzenesulfonic acid and 2-chloroaniline are continuously added dropwise to the multi-stage series reactors with a constant flow pump, the flow rate of 2-chloroaniline is 0.750L / h, and 30% ammonium persulfate solution is used with a constant flow pump Add to the reactor in five stages, the flow rate is 1.369L / h, 1.369L / h, 1.369L / h, 0.958L / h, 0.411L / h, and the reaction temperature is controlled at about 5°C. After the reaction product was washed with water, washed with acetone, and dried in vacuum, the yield of polyaniline was 75%, and the conductivity was 2.0S cm -1 , number average molecular weight 3.8×10 4 , the molecular weight distribution value is 3.1, and the diameter of polyaniline particles is not greater than 25 μm.

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Abstract

The invention discloses a multi-level continuous polyaniline synthesis process, which comprises the following steps: under the condition of -20-50DEG C, continuously adding aniline monomers, an oxidant and medium acid water solution into a multi-level serial tubular reactor to generate polyaniline. According to the process, high-concentration raw materials can be used at low-temperature condition, the emission of waste liquid can be reduced, polyaniline prepared by adopting the process has high yield, the relative molecular weight of prepared polyaniline is intensively distributed, and the tubular reactor used for synthesizing polyaniline cannot be influenced by the ratio of heat transfer area to reaction volume.

Description

technical field [0001] The invention belongs to the technical field of conductive polymers, and relates to a polyaniline continuous synthesis process. Background technique [0002] Polyaniline is a new type of functional polymer material, commonly known as conductive plastic. It is a special functional material. It has the density of plastic, the conductivity of metal and the processability of plastic. It also has the chemical and chemical properties that metal and plastic lack. Electrochemical performance is a chemical material that won the Nobel Prize. Because of its unique chemical, electrochemical and optical properties, it has broad prospects in the fields of energy, electromagnetic shielding and electrochromism. Related industries involve electronic chemicals, Many aspects such as shipbuilding industry, petrochemical industry, and military stealth materials have become popular materials for research and development by countries all over the world. [0003] Conductive ...

Claims

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Application Information

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IPC IPC(8): C08G73/02
Inventor 陈永平吴其建金汉强杨爱军司马维维周亚苓
Owner CHINA PETROLEUM & CHEM CORP
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