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A kind of method for catalyzing synthesis of ethylene bis-stearamide by compound doped heteropoly acid salt

A technology of ethylene bisstearamide and heteropolyacid salt, which is applied in the field of catalyzed synthesis of ethylene bisstearamide by composite doping of heteropolyacid salt, which can solve the impact of product quality and application, product whiteness needs to be improved, product Yellowing and other problems, to achieve excellent catalytic performance, good affinity, light color effect

Active Publication Date: 2022-08-09
湖南雄创新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, industrial production of EBS mainly uses sulfuric acid or phosphoric acid as catalysts (Hu Dan et al., Fine Chemical Intermediates, 2013, 43(1): 59-62), which have high catalytic activity, but due to the high reaction temperature, the catalyst It has oxidizing ability, it is easy to cause the product to turn yellow and the color is high
Even if antioxidants are added and nitrogen is introduced into the reaction system, the whiteness of the product still needs to be improved
In addition, sulfuric acid and other corrosive reaction equipment remain in the product after the reaction is completed, which has an impact on the quality and application of the product

Method used

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  • A kind of method for catalyzing synthesis of ethylene bis-stearamide by compound doped heteropoly acid salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of catalyst: 0.5 mmol cetyltrimethylammonium chloride, 0.5 mmol zirconium nitrate and 1 mmol phosphotungstic acid were weighed and dissolved in 20 ml of deionized water, respectively; after complete dissolution, at room temperature and under continuous stirring conditions , first slowly add the cetyltrimethylammonium chloride solution dropwise to the phosphotungstic acid solution, and then continue to slowly add the zirconium nitrate solution dropwise to gradually form a white precipitate; after the dropwise addition, continue to stir for 0.5 h, Set to age for 1 h. After the white precipitate is separated by filtration and dried, the molecular formula is [(C 16 H 33 )N(CH 3 ) 3 ] 0.5 Zr 0.5 H 0.5 PW 12 O 40 of complex doped heteropolyacid salts.

Embodiment 2

[0018] The preparation of catalyst: the preparation process is the same as in Example 1, only the addition of cetyltrimethylammonium chloride is changed to 0.4 mmol, and the addition of zirconium nitrate is changed to 0.6 mmol, and the available molecular formula is [(C 16 H 33 )N(CH 3 ) 3 ] 0.4 Zr 0.6 H 0.2 PW 12 O 40 of complex doped heteropolyacid salts.

Embodiment 3

[0020] The preparation of catalyst: the preparation process is the same as in Example 1, only the addition of cetyltrimethylammonium chloride is changed to 0.6 mmol, and the addition of zirconium nitrate is changed to 0.4 mmol, and the available molecular formula is [(C 16 H 33 )N(CH 3 ) 3 ] 0.6 Zr 0.4 H 0.8 PW 12 O 40 of complex doped heteropolyacid salts.

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Abstract

The invention relates to a method for catalyzing and synthesizing ethylene bisstearamide by compound doped heteropoly acid salt, which is characterized in that the compound doped heteropoly acid salt is used as a catalyst to catalyze stearic acid and ethylene diamine to synthesize ethylene bis-stearamide. Stearamide, the structural formula of described compound doped heteropoly acid salt is: wherein, R=-C 16 H 33 , x=0.4~0.6, y=0.4~0.6. The advantages of the present invention lie in that the molecular structure of the compound-doped heteropolyacid salt catalyst involved contains lipophilic groups, has good affinity for the raw material stearic acid, has a relatively high specific surface area, suitable acid strength and comparatively low acidity. The high surface acid content has excellent catalytic performance for the reaction of synthesizing ethylene bis-stearamide, and the product has high yield, light color and high purity.

Description

technical field [0001] The invention relates to a method for synthesizing ethylene bis-stearamide, in particular to a method for catalyzing and synthesizing ethylene bis-stearamide by compound doped heteropoly acid salt. Background technique [0002] Ethylene bis-stearamide (abbreviated as EBS) is an important plastic additive with functions such as lubrication, mold release, anti-static and increasing the surface gloss of plastic products. It is widely used in thermoplastic resins such as ABS, PVC and PC. processing. In the EBS synthesis method reported in the literature, using stearic acid and ethylenediamine as raw materials, the cost of preparing EBS through the two-step reaction of neutralization, salt formation and catalytic dehydration is relatively low, and it is the main method for industrial production at present. [0003] At present, the industrial production of EBS mainly uses sulfuric acid or phosphoric acid as catalysts (Hu Dan et al., Fine Chemical Intermedia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C231/02C07C233/36B01J27/188B01J31/34B01J35/10
CPCC07C231/02B01J27/188B01J31/34B01J35/60B01J35/61C07C233/36Y02P20/584
Inventor 周喜蒋邵武邱政友
Owner 湖南雄创新材料科技有限公司
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