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Catalyst for producing polyethylene polyamine, application of catalyst and preparation method of polyethylene polyamine

A polyvinylpolyamine and catalyst technology, which is applied in chemical instruments and methods, disproportionate preparation of amino compounds, heterogeneous catalyst chemical elements, etc., can solve the problem of low diethylenetriamine/piperazine ratio, producing more piperazine, problems such as low economic value, to achieve the effect of excellent performance, less content and high proportion

Inactive Publication Date: 2019-04-05
SHANDONG YUHUANG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A certain amount of polyethylene polyamines can be produced by the hydrogenation method of ethanolamine, and the process is environmentally friendly, but the typical product content of polyethylene polyamines is about 10wt%. To increase the output of polyethylene polyamines, piperazine and other rings will be caused. The production of cyclic amines, while the economic value of cyclic amines is lower than that of polyethylene polyamines
[0004] In the mid-1970s, foreign countries carried out research on the preparation of polyethylene polyamines. BASF’s patent GB1508460A first proposed the use of ethylenediamine to prepare diethylenetriamine at a temperature of 100-150°C and a hydrogen pressure of 2.5-4.5MPa. , using nickel-copper or cobalt catalyst, the conversion rate is lower than 70%, the main disadvantage of this patent is that more piperazine is produced, and the ratio of diethylenetriamine / piperazine is low

Method used

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  • Catalyst for producing polyethylene polyamine, application of catalyst and preparation method of polyethylene polyamine
  • Catalyst for producing polyethylene polyamine, application of catalyst and preparation method of polyethylene polyamine

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preparation example Construction

[0047] In a third aspect, the present invention provides a method for preparing polyethylene polyamine, comprising the following steps:

[0048]Provide C1-C6 amine substances as reaction raw materials, the amine substances are fed with hydrogen under the condition of heating and pressure, and a catalytic reaction occurs under the catalysis of the catalyst of the present invention, and the polyethylene is obtained after the reaction Polyamines.

[0049] C1-C6 amine substances are used as reaction raw materials, and the catalyst provided by the invention is used to catalyze the reaction, so that the amino groups in the amine substances are transferred, thereby preparing polyethylene polyamines. The preparation method of polyethylene polyamine provided by the invention has the advantage of high yield of diethylene triamine / piperazine.

[0050] Wherein, the amines include but are not limited to at least one of ethylenediamine, diethylenetriamine, triethylenetetramine or aminoethy...

Embodiment 1

[0056] This example is a catalyst for the production of polyethylene polyamines, consisting of 30% NiO-30% CoO-10% CuO-30% Al 2 o 3 .

[0057] The preparation method of this catalyst comprises the following steps:

[0058] S1) Add water to 6.04g copper nitrate trihydrate, 23.28g cobalt nitrate hexahydrate, 23.28g nickel nitrate hexahydrate and 44.12g aluminum nitrate nonahydrate to 200g to obtain a solution containing metal elements;

[0059] S2) prepare a certain amount of 20wt%Na 2 CO 3 alkaline solution;

[0060] S3) Add the solution in step S1) and the alkali solution in step S2) at 70°C and mechanical stirring at a certain ratio and mix at a constant speed, keep the pH of the precipitation process = 7, age for 2 hours after precipitation, wash with water, pump The filter cake was obtained by filtration and drying, calcined at 500°C for 4 hours, and the catalyst was obtained after tableting and granulation.

Embodiment 2

[0062] This example is a catalyst for producing polyethylene polyamine, which is composed of 5% Ni-10% Co-1.5% Ru-1.2% B-silicon-aluminum composite oxide carrier.

[0063] The preparation method of this catalyst comprises the following steps:

[0064] Take by weighing 5g processed silicon-aluminum composite oxide as catalyst carrier, 1.24g nickel nitrate hexahydrate, 2.47g cobalt nitrate hexahydrate, 2.3ml ethylenediamine and 0.15g ruthenium chloride, 0.34 boric acid are dissolved in 10ml water, in Dissolve at 50°C, add half of the impregnation solution evenly to the catalyst carrier, dry at room temperature, dry in an oven at 120°C for 4 hours, and then bake in a muffle furnace at 550°C for 4 hours; repeat the above preparation process until the required loading capacity is reached, and get catalyst.

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Abstract

The invention provides a catalyst for producing polyethylene polyamine, an application of the catalyst and a preparation method of the polyethylene polyamine, and relates to the field of polyethylenepolyamine preparation. The catalyst takes Cu and / or Ni as active components and takes boron and / or at least one of transition metal elements as catalysis promoting components, CuO and / or NiO account for 10-60% of the weight of the catalyst, and boron oxide and / or transition metal oxide account for 5-15% of the weight of the catalyst. The catalyst is used for preparing the polyethylene polyamine, the problem of low selectivity of polyethylene polyamine in an existing production method can be relieved, and the selectivity of the polyethylene polyamine can be improved.

Description

technical field [0001] The invention relates to the field of preparation of polyethylene polyamines, in particular to a catalyst for producing polyethylene polyamines, its application and a preparation method of polyethylene polyamines. Background technique [0002] Polyethylene polyamine is widely used as a fine chemical, and it is involved in the production of preservatives, chelating agents, surfactants, crosslinking agents, and curing agents. It occupies an important position in the industry and is known as an industrial MSG. [0003] At present, the relatively mature polyethylene polyamines are mostly by-products of ammonolysis reaction, and the production methods include dichloroethane ammonolysis method, ethanolamine reductive ammoniation method, etc. Among them, the ammonolysis method of dichloroethane has cheap raw materials and mature technology, but produces a large amount of halogen-containing wastewater and is severely corroded. Under the current environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/89C07C211/14C07C209/64
CPCB01J23/002B01J23/755B01J23/892B01J23/8986B01J2523/00C07C209/64C07C211/14B01J2523/17B01J2523/31B01J2523/845B01J2523/847B01J2523/305B01J2523/41B01J2523/821B01J2523/48B01J2523/74
Inventor 杜宝磊李雪侯红霞冯善宾徐伟伟杨慧王金书
Owner SHANDONG YUHUANG CHEM CO LTD
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