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Production method for continuously synthesizing polyether amine through static bed

A production method and a technology for chemical synthesis, which are applied in the field of continuous synthesis of polyetheramines in a fixed bed, can solve problems such as being unsuitable for large-scale industrialization, high reaction pressure and temperature, insufficient ammonia conversion rate, etc., and achieve easy automatic control, Low pressure and temperature, low cost effect

Active Publication Date: 2015-06-10
扬州晨化新材料股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned continuous method adopts multiple fixed-bed reactors, and the residence time of the reaction materials in the reactors is short, and the production cost is low; but the production equipment is complex, the process conditions are high, the reaction pressure and temperature are relatively high, and the catalyst requirements are diversified. Insufficient transformation rate, not suitable for large-scale industrialization

Method used

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  • Production method for continuously synthesizing polyether amine through static bed

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Embodiment 1

[0023] Activated skeleton nickel catalyst: The skeleton nickel catalyst used is supported by alumina, and the supported metal content (reduced state) is: 60% nickel, 10% copper, and 3% lanthanum. The catalyst is loaded in the reactor in sections, and the reduction temperature is 150°C, the heating rate is 0.1°C / min, and the reduction time is 40h, to obtain a fixed-bed reactor containing an activated skeleton nickel catalyst loaded with nickel, copper and lanthanum.

[0024] Preparation of polyether amine: first pour polypropylene glycol ether (molecular weight 200) and liquid ammonia into each raw material tank respectively, and then pour polypropylene glycol ether and liquid ammonia into the pipeline with a volume ratio of 1:1.35 after being metered by a metering pump Mix, and then spray through the nozzle to form a uniform mixed liquid, and then fully mix the mixed liquid with hydrogen (the hydrogen source is continuously provided by decompression of the pressure regulator) a...

Embodiment 2

[0028] Activated skeleton nickel catalyst: The skeleton nickel catalyst used is based on alumina as the carrier, and the supported metal content (reduced state) is: nickel 70%, copper 8%, lanthanum 2%; the catalyst is packed in the reactor in sections, after reduction The temperature is 270° C., the heating rate is 1° C. / min, and the reduction time is 30 h, and a fixed-bed reactor containing an activated skeleton nickel catalyst loaded with nickel, copper and lanthanum is obtained.

[0029] Preparation of polyether amine: Pour polypropylene glycol ether (molecular weight: 2000) and liquid ammonia into the raw material tank respectively. After the polypropylene glycol ether and liquid ammonia are metered by the metering pump, they are poured into the pipeline with a volume ratio of 1:1.98 for mixing. Then spray through the nozzle to form a uniform mixed liquid, and then fully mix the mixed liquid with hydrogen (the hydrogen source is continuously provided by a pressure regulator...

Embodiment 3

[0033] Activated skeleton nickel catalyst: The skeleton nickel catalyst used is based on silicon oxide, and the supported metal content (reduced state) is: 80% nickel, 5% copper, and 1.5% lanthanum; the catalyst is mixed in the reactor, and the reduction temperature 300° C., a heating rate of 2° C. / min, and a reduction time of 25 hours to obtain a fixed-bed reactor containing an activated skeleton nickel catalyst loaded with nickel, copper, and lanthanum.

[0034] Preparation of polyether amine: Pour trimethylolpropane polypropylene glycol ether (molecular weight 430) and liquid ammonia into the raw material tank respectively, and trimethylolpropane polyoxypropylene ether and liquid ammonia are respectively measured by a metering pump and then calculated according to the volume ratio The ratio of 1:2.29 is poured into the pipeline for mixing, and then sprayed through the nozzle to form a uniform mixed liquid, and then the mixed liquid and hydrogen (the hydrogen source is contin...

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Abstract

The invention provides a production method for continuously synthesizing polyether amine through a static bed, and relates to the technical field of gydrogenated (amination) ammoniation of polyether polyol, long-chain fatty alcohol or aromatic alcohol compounds. The method comprises the steps of carrying out uniform spray mixing on polyether polyol and liquid ammonia and then mixing the mixture with hydrogen; carrying out hydrogen-present ammoniation reaction on a static bed reactor containing nickel / copper / lanthanum-loaded activated framework catalyst at the temperature 130 DEG C-280 DEG C and at the pressure of 3.0MPa-15.0MPa; and carrying out gas-liquid separation on reactants, dehydrating and deaminating a liquid material by virtue of an evaporator, continuously discharging, thereby obtaining polyether amine. The production method disclosed by the invention is a production method for continuous synthesis of polyether amine, which easily realize automation control.

Description

technical field [0001] The invention relates to the technical field of hydrogenation ammonia (amine) of polyether polyols, long-chain aliphatic alcohols or aromatic alcohols, in particular to a production method for continuous fixed-bed synthesis of polyetheramines. Background technique [0002] A series of amine compounds can be prepared by subjecting polyether polyols, long-chain aliphatic alcohols or aromatic alcohols containing terminal hydroxyl groups to hydrogenation (amine) reactions, which can be widely used in epoxy resin curing agents, Wind energy blade curing agent, polyurethane polyurea elastomer, gasoline cleaning agent, water-based coating, textile finishing agent and epoxy toughening and other fields. [0003] Patent CN 201110188767.8 discloses a preparation process of amino-terminated polyether. The method uses polyether polyols with a number-average Preparation of polyetheramines by catalytic reductive amination. [0004] Patent CN201110188776.7 discloses ...

Claims

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Application Information

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IPC IPC(8): C08G65/00C07C217/28C07C213/02
Inventor 房连顺董晓红安淑强管丹王仕林毕继辉崔强祥郑军峰
Owner 扬州晨化新材料股份有限公司
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