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Filtering material and application thereof in preparation of high-purity guanidine carbonate

A technology of multi-walled carbon nanotubes and polymers, applied in the field of filter materials, can solve problems such as difficult to completely remove and obtain high-purity guanidine carbonate, and achieve strong anti-interference ability, good adsorption performance, and good repeatability.

Active Publication Date: 2021-07-27
石嘴山市鹏盛化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The domestic production of guanidine carbonate mainly adopts the method of melting dicyandiamide and ammonium chloride to generate guanidine hydrochloride, then generating free guanidine under the action of alkali, and then reacting guanidine with carbon dioxide to generate guanidine carbonate. When this route is melted at high temperature, it is easy to generate guanidine hydrochloride such as melamine and its dimers, polymers and other impurities, and there are Cl in the system - 、Na + , it is difficult to completely remove the net during purification, even for guanidine carbonate with a purity greater than 99%, its ash content is still as high as 0.2%, so it is not easy to obtain high-purity guanidine carbonate

Method used

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  • Filtering material and application thereof in preparation of high-purity guanidine carbonate
  • Filtering material and application thereof in preparation of high-purity guanidine carbonate
  • Filtering material and application thereof in preparation of high-purity guanidine carbonate

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Embodiment 1

[0054] A method for preparing magnetic molecularly imprinted polymers,

[0055]Modified multi-walled carbon nanotubes: Sonicate the multi-walled carbon nanotubes in an acidic solution for 2 hours, separate them, rinse until neutral, dry, add toluene and sonicate for 1 hour, add acrylic acid at a temperature of 60°C, and then add AIBN, Reacted for 9 hours, separated by suction filtration, washed with deionized water, and dried to obtain modified multi-walled carbon nanotubes. The acidic solution is a mixed solution of sulfuric acid and nitric acid, and the mixing ratio of sulfuric acid and nitric acid in the acidic solution is a mass ratio of 1:0.3; the amount of multi-walled carbon nanotubes is 0.3wt% of the acidic solution; the multi-walled carbon after acid solution treatment The addition amount of nanotube is 0.2wt% of toluene; the addition amount of acrylic acid is 1.5wt% of toluene; the addition amount of AIBN is 1wt% of acrylic acid.

[0056] Preparation of modified cou...

Embodiment 2

[0061] Compared with Example 1, the present invention differs only in that in the preparation of modified multi-walled carbon nanotubes, the amount of acrylic acid added is 2.8wt% of that of toluene, in the preparation of modified halloysite nanotubes, the modified coupling The addition amount of agent is 23wt% of ethanol solution.

Embodiment 3

[0063] Compared with Example 1, the present invention is only different in that in the preparation of modified multi-walled carbon nanotubes, the amount of acrylic acid added is 4.2wt% of that of toluene, and in the preparation of modified halloysite nanotubes, the modified coupling The addition amount of agent is 34wt% of ethanol solution.

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Abstract

The invention discloses a filter material and application thereof in preparation of high-purity guanidine carbonate, belongs to the technical field of filter materials, and particularly relates to a magnetic molecularly imprinted polymer and a preparation method thereof. Amagnetic molecularly imprinted polymer taking a compound containing a modified multi-walled carbon nanotube as a composite carrier, and polyacrylic acid is grafted on the modified multi-walled carbon nanotube; the magnetic molecularly imprinted polymer is prepared by taking dopamine as a functional monomer and melamine as a template molecule. The magnetic molecularly imprinted polymer prepared by the method disclosed by the invention has good adsorption performance on melamine, and the adsorption capacity is more than 25mg / g after adsorption is performed for 1 hour; the anti-interference performance is high in melamine adsorption, and the adsorption capacity is 23 mg / g or above under the interference of cyanuric acid and diaminoazine; and after the active desorption agent is desorbed, the repeated adsorption performance is good, and the repeated number of times is 24 or above when the adsorption performance is reduced by 90%.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and in particular relates to a filter material and its application in the preparation of high-purity guanidine carbonate. Background technique [0002] Guanidine carbonate is an organic fine chemical product with a wide range of uses, mainly used in the synthesis of flame retardants, flocculants, foaming agents, and sulfonamides. Guanidine carbonate is also used as a synergist for synthetic detergents and as a raw material for high-end cosmetics. The domestic production of guanidine carbonate mainly adopts the method of melting dicyandiamide and ammonium chloride to generate guanidine hydrochloride, then generating free guanidine under the action of alkali, and then reacting guanidine with carbon dioxide to generate guanidine carbonate. When this route is melted at high temperature, it is easy to generate guanidine hydrochloride such as melamine and its dimers, polymers and other impuri...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/06C08G73/06B01J20/26B01J20/28B01J20/30B01D39/16C07C279/02C07C277/06
CPCB01D39/16B01J20/268B01J20/28009B01J20/3057C07C277/06C08F292/00C08G73/0672C08F220/06C07C279/02
Inventor 周鹏
Owner 石嘴山市鹏盛化工有限公司
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