CN104386735A - Preparation method of zinc oxide - Google Patents

Abstract

The invention discloses a preparation method of zinc oxide. The method comprises the following steps: 1) heating a zinc sulfate solution to 60 DEG C, adding 0.16g/l of sodium hexametaphosphate, 0.53g/l of magnesium oxide, 0.13g/l of active silica powder and 0.11g/l of ethylene glycol, stirring for 30 minutes, adding 1.5g/l of sodium carbonate, adjusting the pH value to 9.3, stirring and generating a mixture for coating basic zinc carbonate and sodium sulfate, and then carrying out filter pressing; 2) washing the basic zinc carbonate which is obtained in a filter pressing manner, washing until no sulfate radical exists in the material, and then drying until the moisture is smaller than 2.2%; and 3) roasting the dried material at 580 DEG C, so as to obtain a zinc oxide product. According to the preparation method of the zinc oxide disclosed by the invention, the prepared magnesium hydrate is relatively high in purity and good in dispersity; and the activity of the zinc oxide is also improved.

Description

The preparation method of zinc oxide

Technical field

The present invention relates to the preparation method of zinc oxide.

Background technology

The preparation method of existing zinc oxide, its magnesium hydroxide purity prepared is not high enough, and dispersiveness is good not, and activity is not high.

Summary of the invention

The object of the present invention is to provide a kind of preparation method of zinc oxide, its magnesium hydroxide purity prepared is higher, and good dispersity, also improves the activity of zinc oxide.

For achieving the above object, technical scheme of the present invention designs a kind of preparation method of zinc oxide, comprises the steps:

1) solution of zinc sulfate is heated to 60 DEG C, add the Sodium hexametaphosphate 99 of 0.16g/l, the magnesium oxide of 0.53g/l, the active micro silicon powder of 0.13g/l, the ethylene glycol of 0.11g/l, stir 30 minutes, add the sodium carbonate of 1.5g/l, pH value is regulated to be 9.3, stir the mixture generating coated zinc subcarbonate and sodium sulfate, then carry out press filtration;

2) zinc subcarbonate that press filtration obtains is washed, wash sulfate radical-free to material, be then dried to moisture and be less than 2.2%;

3) to dried material in 580 DEG C of roastings, obtain zinc oxide product.

Advantage of the present invention and beneficial effect are: the preparation method providing a kind of zinc oxide, and its magnesium hydroxide purity prepared is higher, and good dispersity, also improves the activity of zinc oxide.

Embodiment

Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.

The technical scheme that the present invention specifically implements is:

A preparation method for zinc oxide, comprises the steps:

1) solution of zinc sulfate is heated to 60 DEG C, add the Sodium hexametaphosphate 99 of 0.16g/l, the magnesium oxide of 0.53g/l, the active micro silicon powder of 0.13g/l, the ethylene glycol of 0.11g/l, stir 30 minutes, add the sodium carbonate of 1.5g/l, pH value is regulated to be 9.3, stir the mixture generating coated zinc subcarbonate and sodium sulfate, then carry out press filtration;

2) zinc subcarbonate that press filtration obtains is washed, wash sulfate radical-free to material, be then dried to moisture and be less than 2.2%;

3) to dried material in 580 DEG C of roastings, obtain zinc oxide product.

 

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (1)

1. the preparation method of zinc oxide, is characterized in that, comprises the steps:

1) solution of zinc sulfate is heated to 60 DEG C, add the Sodium hexametaphosphate 99 of 0.16g/l, the magnesium oxide of 0.53g/l, the active micro silicon powder of 0.13g/l, the ethylene glycol of 0.11g/l, stir 30 minutes, add the sodium carbonate of 1.5g/l, pH value is regulated to be 9.3, stir the mixture generating coated zinc subcarbonate and sodium sulfate, then carry out press filtration;

2) zinc subcarbonate that press filtration obtains is washed, wash sulfate radical-free to material, be then dried to moisture and be less than 2.2%;

3) to dried material in 580 DEG C of roastings, obtain zinc oxide product.