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Method for catalytic synthesis of ethylene bis stearamide with phosphotungstate

A technology of ethylene bis-stearamide and phosphotungstate, which is used in the preparation of carboxylic acid amides, chemical instruments and methods, preparation of organic compounds, etc. Yellowing and other problems, to achieve excellent catalytic performance, high surface acid content, light color effect

Inactive Publication Date: 2019-12-20
湖南雄创新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Catalyst preparation: Weigh 0.25 mmol of ammonium carbonate, 0.5 mmol of titanium sulfate and 1 mmol of phosphotungstic acid and dissolve them in 20ml of deionized water; after dissolving, slowly add the titanium sulfate solution dropwise to the phosphorus In the tungstic acid solution, react for 0.5 hours, then slowly add ammonium carbonate solution dropwise, and gradually form white precipitate; Molecular formula can be obtained as (NH 4 ) 0.5 Ti 0.5 h 0.5 PW 12 o 40 of phosphotungstate.

Embodiment 2

[0018] The preparation of catalyst: preparation process is the same as embodiment 1, only the add-on of ammonium carbonate is changed into 0.2 mmol, the add-on of titanium sulfate is changed into 0.6 mmol, molecular formula can be obtained as (NH 4 ) 0.4 Ti 0.6 h 0.2 PW 12 o 40 of phosphotungstate.

Embodiment 3

[0020] The preparation of catalyst: preparation process is the same as embodiment 1, only the add-on of ammonium carbonate is changed into 0.3 mmol, the add-on of titanium sulfate is changed into 0.4 mmol, molecular formula can be obtained as (NH 4 ) 0.6 Ti 0.4 h 0.8 PW 12 o 40 of phosphotungstate.

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Abstract

The invention relates to a method for catalytic synthesis of ethylene bis stearamide with a phosphotungstate. The method is characterized in that the phosphotungstate is used as a catalyst to catalyzestearic acid and ethylenediamine to synthesize ethylene bis stearamide, the structural formula of the phosphotungstate is (NH<4>)<x>Ti<y>H<3-x-4y>PW<12>O<40>, x= 0.4-0.6, and y=0.4-0.6. The phosphotungstate catalyst provided by the invention has the advantages of relatively high specific surface area, proper acid strength, relatively high surface acid amount, excellent catalytic performance on the reaction for synthesizing ethylene bis stearamide; and an obtained product is high in yield, light in color and luster, and high in purity.

Description

technical field [0001] The invention relates to a method for synthesizing ethylene bis-stearamide, in particular to a method for catalyzing the synthesis of ethylene bis-stearamide with phosphotungstate. Background technique [0002] Ethylene bisstearamide (abbreviated as EBS) is an important plastic additive, which has the functions of lubrication, mold release, 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, the cost of preparing EBS is relatively low by using stearic acid and ethylenediamine as raw materials through two-step reactions of neutralization to salt and catalytic dehydration, which is the main method of industrial production at present. [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), whi...

Claims

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Application Information

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IPC IPC(8): C07C231/02C07C233/36B01J27/24B01J27/188
CPCC07C231/02B01J27/24B01J27/188C07C233/36
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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