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Preparation method of white carbon black for PE separators

A white carbon black and separator technology, applied in the direction of silica, silicon oxide, etc., can solve the problems of low DBP absorption value and the requirement of sodium sulfate amount, etc., and achieve the effect of fast sieving, less floating dust and fast dispersion

Inactive Publication Date: 2016-12-14
镇江奥美机电设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difference from ZL96109937.2 is that the amount of sodium sulfate in the product is required, while the absorption value of DBP is lower

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Use a 500L stainless steel reaction kettle with stirring, add 123L of water glass with a density of 1.085g / cm3, start stirring, use direct steam to heat up to 85°C, add 20% sulfuric acid dropwise over 40min, when the pH reaches 10.5, add 227L The water glass is added dropwise to the reaction kettle in 55 minutes, and 20% sulfuric acid is added at the same time, and the pH value is kept at 10.5 throughout the process, and then 20% sulfuric acid is added in 20 minutes to completely react the unreacted water glass in the reaction kettle. And use acid to adjust the pH value to 6.0, and age for 30min. The reaction suspension is pumped into the plate and frame filter, and the mother liquor is filtered off, and then the filter cake is washed with clean water until the conductivity of the filtrate reaches 200-300μm / cm At this time, stop washing with water, and blow the filter cake with compressed air to reduce the water content of the filter cake. The filter cake was beaten int...

Embodiment 2

[0028] What differs from embodiment 1 is that bottom material water glass is added to 136L, when the second step adds acid, water glass addition 214L.

Embodiment 3

[0030] Different from Example 1, the water glass density used for reaction is 1.088g / cm3.

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PUM

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Abstract

The invention relates to a preparation method of white carbon black for PE separators for a lead-acid starter battery. The preparation method of white carbon black for the PE separators comprises the following steps that (1) raw material comprises sodium silicate and sulfuric acid; (2) the reaction comprises the following steps that 30-45% of the total amount of the reaction sodium silicate is added as a base material and stirred in the reaction kettle, after the temperature is raised up to 84-87 DEG C, the sulfuric acid is added for reacting, and the reaction time is 30-40 minutes, when the pH value is 10-10.7, the remaining 70-55% of sodium silicate is all added within another 40-55 minutes, but the pH value is held constant; moreover, the addition of the sulfuric acid is continued for another 10-25 minutes until the sodium silicate is entirely reacted, and the pH value is 6.0, then the product is aged for 30-60 minutes under a condition of maintaining the temperature; (3) filtration and washing are performed; (4) slurrying is carried out; (5) spray drying is performed until the moisture content of the product reaches 4.0-5.5%. According to the preparation method of white carbon black for the PE separators, white carbon black is prepared for the special requirements for the PE separators. The preparation method of white carbon black for the PE separators has the advantages of being reasonable and feasible in process, and capable of meeting the technical requirements of the PE separators in purity, physical performance, electrical performance, porosity, etc.

Description

technical field [0001] The invention relates to a preparation method of chemical raw materials, that is, a preparation method of white carbon black used for PE separators of start-up lead-acid storage batteries. Background technique [0002] In the prior art, PE separator is the abbreviation of ultra-high molecular weight polyethylene battery separator. It is made of ultra-high molecular weight polyethylene as the main material, with white carbon black, light calcium stearate, process oil, and trichlorethylene as auxiliary materials. It is refined through a complicated process. The white carbon black in its formula Consumption is more than 60%. [0003] Compared with traditional separators (PVC), PE separators have the following advantages: pore size less than 0.1 μm, porosity greater than 60%, high purity, high oxidation resistance, high puncture resistance, high tear resistance, low acid replacement, Low resistance, weather resistance at -40°C-+80°C, it is the best perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12C08L23/06C08K3/36
CPCC01B33/12C08K3/36
Inventor 张志杰朱彬朱茂文
Owner 镇江奥美机电设备有限公司
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