Preparation process of stearate

A technology of stearate and preparation technology, applied in the field of preparation technology of stearate, can solve the problems of affecting the performance of plastic products, difficulty in controlling its wetness, unstable production process, etc., saving reaction time and eliminating caustic soda , The effect of uniform product quality

Active Publication Date: 2019-08-30
DONGGUAN CHNV TECH CO LTD
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  • Application Information

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Problems solved by technology

Although this method overcomes some shortcomings of the metathesis method and the dry method, the stearate produced by this method is powdery, and it is very difficult to control its wetness, which will inevitably affect the performance of plastic products in use.
[0006] CN107311855A discloses a preparation method of stearate, the method comprises first melting stearic acid to obtain material A, stirring and grinding water and part of metal oxides, then adding remaining metal oxides and catalyst to obtain material B , A and B react and heat up to finally obtain molten stearate. This method avoids the defects of intense reaction and uneven reaction. However, as the reaction heats up, the catalyst will gradually fail, resulting in unstable production process, and also due to the failure of the catalyst. while doping with impurities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of preparation technology of zinc stearate, described technology specifically comprises the steps:

[0041] (1) Weigh 500kg of stearic acid and 75.5kg of zinc oxide, the metal compound is ground and passed through a 200-mesh screen, then stearic acid and zinc oxide are added to the reaction kettle in turn, and then 0.86kg of benzoic acid is added.

[0042] (2) Fill the inside of the reaction kettle in step (1) with an inert gas to pressurize to 0.6 MPa, then stir and heat up to 80° C., and react for 4 hours to obtain zinc stearate coarse powder.

[0043] (3) the zinc stearate coarse powder that step (2) obtains is pulverized, finally obtains zinc stearate white powder.

[0044] (4) Using a differential scanning calorimeter to analyze the purity of the powder product obtained in step (3).

[0045] Table 1 is zinc stearate product detection analysis result among the present invention.

[0046] Table 1:

[0047] Test items standard value test value ...

Embodiment 2

[0049] A kind of preparation technology of magnesium stearate, described technology specifically comprises the steps:

[0050] (1) Weigh 500kg of stearic acid and 31.5kg of magnesium oxide, the metal compound is ground and passed through a 200-mesh sieve, then the stearic acid and zinc oxide are added to the reaction kettle in turn, and then 0.53kg of water is added.

[0051] (2) Fill the inside of the reactor in step (1) with an inert gas and pressurize to 0.55 MPa, then stir and heat up to 80° C., and react for 4.5 hours to obtain magnesium stearate coarse powder.

[0052] (3) The magnesium stearate coarse powder obtained in step (2) is pulverized to finally obtain the magnesium stearate white powder product.

[0053] (4) Using a differential scanning calorimeter to analyze the purity of the powder product obtained in step (3).

Embodiment 3

[0055] A kind of preparation technology of magnesium stearate, described technology specifically comprises the steps:

[0056] (1) Weigh 500kg of stearic acid and 61kg of magnesium hydroxide, grind the metal compound and pass through a 200-mesh sieve, then add stearic acid and zinc oxide into the reaction kettle successively, and then add 0.82kg of maleic anhydride.

[0057] (2) Fill the inside of the reactor in step (1) with an inert gas to pressurize to 0.5 MPa, then stir and heat up to 65° C., and react for 5 hours to obtain coarse magnesium stearate powder.

[0058] (3) The magnesium stearate coarse powder obtained in step (2) is pulverized to finally obtain the magnesium stearate white powder product.

[0059] (4) Use a differential scanning calorimeter to detect the powder product obtained in step (3) for analysis.

[0060] Table 2 is the detection analysis result of magnesium stearate product among the present invention.

[0061] Table 2: Standard values: melting poin...

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Abstract

The invention discloses a preparation process of stearate, which is a preparation method for preparing stearate by directly reacting metal oxide or hydroxide with stearic acid. The process has the advantages of short flow, less equipment consumption, low investment, no waste liquid generation, environmental pollution elimination, saving of a large amount of caustic soda, product cost reduction, less process loss of raw materials, contribution to improving the product yield, and the yield of the finished stearate being 98 percent or more calculated by stearic acid. In addition, no other salt isgenerated in the preparation process, and the stearate product has low inorganic salt content, so that the quality of the product is improved, and the technical scheme disclosed by the invention is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a preparation process of stearate. Background technique [0002] At present, the industrial preparation of calcium stearate, barium, zinc, lead, magnesium and such metal oxides and hydroxides insoluble in water stearate adopts water method (double decomposition method) and anhydrous method (dry method) , wherein the metathesis method firstly reacts stearic acid and sodium oxide to generate sodium stearate during preparation, and then uses the prepared sodium stearate to carry out metathesis reaction with corresponding metal water-soluble salts, thereby finally obtaining the required stearates. The advantage of the metathesis method is that the reaction is easy to carry out, and the process operation is easy to master. However, a large amount of sodium hydroxide needs to be consumed in the process, and these sodium are finally converted into sodium salts and released with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C53/126
CPCC07C51/412C07C53/126
Inventor 胡丹荀育军王玉梅张莉石淑敏
Owner DONGGUAN CHNV TECH CO LTD
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