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Continuous hydro-ammonization or amination reaction method

A technology of amination reaction and hydrogenation ammoniation, which is applied in the field of hydrogenation ammonia (amination), can solve problems such as short lifespan, and achieve the effect of improving efficiency and reducing back-mixing

Active Publication Date: 2015-01-21
扬州晨化新材料股份有限公司 +1
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

However, in some cases it is also necessary to prepare and use specially prepared catalysts
Catalysts with short lifetimes and deactivation are often not suitable for use in fixed bed reactors

Method used

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Examples

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Embodiment Construction

[0015] 1. Mix the polyether polyol and the catalyst in a certain proportion and then pump it into the batching storage tank intermittently through the vacuum system, so that the polyether polyol mixed with the catalyst particles is preheated and stirred in the batching storage tank and then put into the belt In the buffer tank with stirring paddle, the material in the buffer tank is kept at about 80°C under stirring conditions, and then it is preheated to about 170-250°C by the preheater and then sent to the first-stage reaction kettle.

[0016] 2. The reaction raw material amine (ammonia) agent is pumped into the preheater, heated to about 80°C in the preheater, and then sent to the first-stage reactor and the fourth-stage reactor.

[0017] 3. The hydrogen from the hydrogen cylinder is decompressed to 1.0MPa and then enters the hydrogen buffer tank, then enters the diaphragm compressor and is multi-stage compressed to 8-15.0MPa, then enters the constant pressure buffer tank, a...

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Abstract

The invention discloses a continuous hydro-ammonization or amination reaction method, relating to the field of hydrogenation amination technology of polyether, long-chain fatty alcohol or aromatic alcohol compounds. The method comprises the steps: mixing polyether polyol with a catalyst, and then preheating to 80+ / -2DEG C for later use; increasing the temperature of the polyether polyol and the catalyst to 170-250 DEG C, then reacting with an aminating agent or an ammonia agent which is preheated to 80+ / -2DEG C, and hydrogen with pressure of 8-15MPa in a plurality of multilevel reaction kettles which are connected in series; and conducting ammonia or amine recovery and catalyst separation recovery to the crude polyether polyamine products in the last level of reaction kettle to obtain the fine polyether polyamine product. The method is conducted through heterogeneous hydro-ammonization or amination in a manner of suspension reaction, back mixing can be reduced through the plurality of multilevel reaction kettles which are connected in series, and the ammoniation (or amination) efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of hydrogenation ammonia (amine) of polyether, long-chain fatty alcohol or aromatic alcohol compound. Background technique [0002] A series of amine compounds can be prepared by subjecting polyethers, long-chain aliphatic alcohols or aromatic alcohols containing terminal hydroxyl groups to hydrogenation (amine) reaction, which can be widely used in epoxy resin curing agents, surface active medicines and other fields. [0003] Patent US3128311 discloses a method for preparing primary aliphatic amines. The reaction uses special framework nickel as a catalyst, and the prepared primary aliphatic amines have high selectivity. The reaction is implemented in a batch-type reactor. [0004] Patent CN200310112615 discloses a production method of aliphatic amino-terminated polyether and the preparation of its special catalyst. The catalyst is a special-purpose skeleton nickel catalyst. The invention adopts gap kettle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/00
Inventor 董晓红顾雄毅杨建张成宝
Owner 扬州晨化新材料股份有限公司
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