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Method for membrane technology-modified MF production

A technology of production process and membrane technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as residual solid content, achieve the effect of improving recovery rate and reducing energy loss

Active Publication Date: 2018-01-19
绍兴齐英膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The process method involved in the present invention solves the problem of residual solid content in the prior art, and reasonably separates sodium sulfate from MF, and at the same time reduces the energy consumption of subsequent MF solution spray drying

Method used

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  • Method for membrane technology-modified MF production
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Examples

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Embodiment Construction

[0024] Below in conjunction with specific embodiment the present invention is described in further detail:

[0025] The test solution treated in Examples 1-6 is the neutralization solution after the formaldehyde condensation reaction solution is neutralized by alkali during the MF preparation process.

[0026] The process parameter of embodiment 1~embodiment 6 is shown in Table 1:

[0027] Table 1 The technological parameter of embodiment 1~embodiment 6

[0028]

[0029] The energy saving rate of the MF recovery rate of embodiment 1~embodiment 6, residual sodium sulfate and spray tower is shown in Table 2:

[0030] Table 2 MF recovery rate, residual sodium sulfate and energy saving ratio of spray tower in Example 1~Example 6

[0031]

[0032] It can be seen from Examples 1 to 6 that the MF recovery rate of the present invention can reach more than 99.1%, the residual sodium sulfate mass fraction is less than 0.02%, and the energy consumption of the spray tower is saved...

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Abstract

The invention discloses a method for membrane technology-modified MF production and relates to the technical field of disperser preparation. The method is used for treating a reagent obtained by alkali neutralization of a formaldehyde condensation reaction solution in the MF preparation and comprises 1, microfiltration treatment: cooling a test solution to be detected to 40-50 DEG C and treating the test solution through a microfiltration film to obtain microfiltration filtrate, 2, ultrafiltration treatment: treating the microfiltration filtrate through an ultrafiltration film to obtain MF anda solution of sodium sulfate, and 3, electrodialysis concentration: carrying out concentration on the sodium sulfate solution through an electrodialysis film to obtain a concentrated sodium sulfate solution and recovering the residual MF. The method solves the problem of the residual solid content of the prior art, realizes reasonable separation of sodium sulfate and MF and reduces the later MF solution spray-drying energy consumption.

Description

technical field [0001] The invention relates to the technical field of dispersant preparation, in particular to a method for improving the MF production process by adopting membrane technology. Background technique [0002] MF is a dispersant, also known as a diffusing agent, which is a formaldehyde condensation product of sodium methylnaphthalenesulfonate, and its chemical name is sodium methylenebismethylnaphthalenesulfonate. [0003] The common synthesis process of MF is to use the distillate of coal tar with a distillation range of 235-250°C (α-methylnaphthalene and β-methylnaphthalene as the main components) as the main raw material, and sulfonate it with concentrated sulfuric acid to obtain methylnaphthalenesulfonic acid. Then add a certain amount of water, condense with formaldehyde, and then neutralize with liquid caustic soda or lime to make a slurry. The slurry can be spray-dried, and the final slurry or powder is the finished product. [0004] The Chinese inventi...

Claims

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Application Information

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IPC IPC(8): C07C303/44C07C309/36
Inventor 王刚杜志超
Owner 绍兴齐英膜科技有限公司