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A kind of method for catalyzing synthesis of ethylene bis-stearamide by quaternary ammonium titanium salt of phosphotungstate

A technology of ethylene bis-stearamide and phosphotungstic acid is applied in the preparation of carboxylic acid amides, chemical instruments and methods, preparation of organic compounds, etc. Yellow and other problems, to achieve the effect of excellent catalytic performance, good affinity and light color

Active Publication Date: 2022-06-28
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 quaternary ammonium titanium salt of phosphotungstate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of catalyst: Weigh 0.5 mmol cetyltrimethylammonium chloride, 0.5 mmol titanium sulfate and 1 mmol phosphotungstic acid and dissolve them in 20 ml deionized water respectively; , first slowly add the cetyltrimethylammonium chloride solution dropwise to the phosphotungstic acid solution, and then continue to slowly add the titanium sulfate 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 Ti 0.5 H 0.5 PW 12 O 40 phosphotungstate quaternary ammonium titanium salt.

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 titanium sulfate is changed to 0.6 mmol, and the available molecular formula is [(C 16 H 33 )N(CH 3 ) 3 ] 0.4 Ti 0.6 H 0.2 PW 12 O 40 phosphotungstate quaternary ammonium titanium salt.

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 titanium sulfate is changed to 0.4 mmol, and the available molecular formula is [(C 16 H 33 )N(CH 3 ) 3 ] 0.6 Ti 0.4 H 0.8 PW 12 O 40 phosphotungstate quaternary ammonium titanium salt.

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Abstract

The invention relates to a method for catalyzing the synthesis of ethylene bisstearamide by quaternary ammonium titanium phosphotungstate, which is characterized in that ethylene bisstearamide is synthesized from stearic acid and ethylenediamine by using quaternary ammonium titanium phosphotungstate as a catalyst. Stearamide, the structural formula of the quaternary ammonium titanium phosphotungstic acid is: wherein, R=-C 16 h 33 , x=0.4~0.6, y=0.4~0.6. The present invention has the advantages that the molecular structure of the involved quaternary ammonium titanium phosphotungstic acid catalyst contains lipophilic groups, has good affinity to raw material stearic acid, has higher specific surface area, suitable acid strength and comparative High surface acid content has excellent catalytic performance for the reaction of synthesizing ethylene bisstearamide, the yield of the product is high, the color is light, and the purity is high.

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 phosphotungstic acid quaternary ammonium titanium salt. Background technique [0002] Ethylene bis-stearamide (abbreviated as EBS) is an important plastic additive with functions such as lubricating, releasing, antistatic 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 Chem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C231/02C07C233/36B01J31/02B01J27/188
CPCC07C231/02B01J31/0239B01J27/188C07C233/36
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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