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Sodium alginate, and preparation method and application of sodium alginate

A technology of sodium alginate and alginic acid, applied in dyeing, textile and paper making, etc., can solve the problem of using a large amount of urea, and achieve the effect of reducing water quality requirements, reducing costs, and being easy to implement and popularize.

Inactive Publication Date: 2018-05-22
QINGDAO BRIGHT MOON SEAWEED GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of sodium alginate and its preparation method and application, to solve the defect that a large amount of urea needs to be used when the existing sodium alginate printing paste is used for printing

Method used

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  • Sodium alginate, and preparation method and application of sodium alginate

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preparation example Construction

[0016] The preparation method of sodium alginate of the present invention comprises the steps:

[0017] (1) Soak and wash the brown algae with water, and then mix them evenly with an alkali agent to obtain pasty sodium alginate;

[0018] (2) Dilute the pasty sodium alginate with water and filter, then react with calcium chloride solution to obtain calcium alginate;

[0019] (3) adding the calcium alginate to hydrochloric acid for decalcification to obtain alginic acid;

[0020] (4) Pressing and dehydrating the alginic acid, then adding sodium carbonate for solid-phase neutralization to obtain neutralized sodium alginate;

[0021] (5) adding sorbitol and anhydrous sodium sulfate to the neutralized sodium alginate, mixing uniformly, kneading and granulating and drying to obtain semi-finished sodium alginate;

[0022] (6) Mix and grind the semi-finished sodium alginate with a complexing agent and a preservative to obtain sodium alginate.

[0023] In step (1), the brown algae i...

Embodiment 1

[0043] The preparation method of the sodium alginate of the present embodiment comprises the steps:

[0044] (1) Soak and wash the kelp with water, then mix it evenly with sodium carbonate to obtain pasty sodium alginate; the soaking time is 5 hours, the water consumption is 4 times of the kelp quality, the sodium carbonate consumption is 40% of the kelp quality, and the digestion temperature The temperature is 52°C, and the digestion time is 3h;

[0045] (2) Filtrate the pasty sodium alginate with water to obtain diluted sodium alginate, the dilution viscosity of the diluted sodium alginate is 105S; then react with calcium chloride solution to obtain calcium alginate; in calcium chloride solution The mass fraction of calcium chloride is 10%, the dosage of calcium chloride solution is 2% of the mass of the diluted sodium alginate, and the reaction time is 30min;

[0046] (3) adding calcium alginate to hydrochloric acid for decalcification to obtain alginic acid; the number of...

Embodiment 2

[0052] The preparation method of the sodium alginate of the present embodiment comprises the steps:

[0053] (1) Soak and wash the Ascophyllum nodosum with water, then mix it evenly with sodium carbonate to obtain pasty sodium alginate; the soaking time is 10 hours, the water consumption is 6 times of the quality of the Ascophyllum nodosum, and the amount of sodium carbonate is the quality of the Ascophyllum nodosum 40%, the digestion temperature is 54°C, and the digestion time is 5h;

[0054] (2) Filtrate the pasty sodium alginate with water to obtain diluted sodium alginate, the dilution viscosity of the diluted sodium alginate is 105S; then react with calcium chloride solution to obtain calcium alginate; in calcium chloride solution The mass fraction of calcium chloride is 10%, the dosage of calcium chloride solution is 2% of the mass of the diluted sodium alginate, and the reaction time is 30min;

[0055] (3) adding calcium alginate to hydrochloric acid for decalcificatio...

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Abstract

The invention discloses sodium alginate, and a preparation method and an application of sodium alginate. The preparation method of sodium alginate comprises the steps of adding sorbitol after a neutralization procedure, and performing mixing, granulation, drying and grinding to form a final product. Prepared sodium alginate has the advantages of good appearance, high rheological property and the like; a preparation technology is simple and easy to implement and popularize; a PVI (polyvinyl isobutyl ether) value of printing paste of sodium alginate is 0.65-0.73; defects such as blade streaks and mesh clogging during printing can be effectively reduced; a formula of the printing paste of sodium alginate comprises sorbitol; fixation between a dye and a fabric can be promoted; the fabric is dyed uniformly; the color yield and fastness of the printing are increased, so that the consumption of urea in the printing can be reduced; the rheological property of sodium alginate can also be improved; the generation of the printing defects is reduced; the printing of the fabric is uniform; a color is bright; and a pattern is clear.

Description

technical field [0001] The invention relates to the technical field of sodium alginate for printing, in particular to a sodium alginate and its preparation method and application. Background technique [0002] my country's annual output of printed textiles is about 20 billion meters, of which about 70% are reactive dye printed cloth. Reactive dyes have a complete color spectrum, soft hand feeling and high wet fastness. They are not only widely used in cotton, viscose, tencel, hemp and other cellulose fiber fabrics, but also in silk fabrics. When printing with reactive dyes, the amount of dye used in the printing paste is large and the water is less, so it is difficult for the dye to dissolve completely. And when steaming, the dye must absorb the moisture in the steam to fully develop color, so a large amount of urea needs to be added to the printing paste, it can not only serve as a cosolvent to help the dye fully dissolve, but also because of its hygroscopic performance T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/48D06P1/651D06P1/673C08B37/04
Inventor 郇路恒张宗亮张强刘蕴慧王发合王鹏
Owner QINGDAO BRIGHT MOON SEAWEED GROUP
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