Modified white sugar reducer and preparation method thereof and application thereof in printing and dyeing industry

A technology of reducing agent and sugar, applied in dyeing, textile and papermaking, etc., can solve the problems of poor stability, harmful components, decomposition of the body, etc., and achieve the effects of good stability, small reducing ability and short production cycle

Inactive Publication Date: 2009-11-11
FUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a reducing agent that can completely replace or partially replace sodium sulfide and hydrosulfite in the printing and dyeing industry, and solve the problem of poor stability of traditional reducing agents during storage an

Method used

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  • Modified white sugar reducer and preparation method thereof and application thereof in printing and dyeing industry
  • Modified white sugar reducer and preparation method thereof and application thereof in printing and dyeing industry
  • Modified white sugar reducer and preparation method thereof and application thereof in printing and dyeing industry

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preparation example Construction

[0032] The preparation method steps are as follows: slowly add fatty aldehyde into the reactor containing sugar, buffer and water, control the mixing reaction temperature below 15°C, and stir at the speed of 50-100r / min. After adding fatty aldehyde, The temperature of the mixing reaction is raised to 20-80℃ at a rate of 1~5℃ / min. After mixing and reacting for 30min~120min, add the sulfonating agent. During the feeding process, the mixing reaction temperature is 20~80℃. After the chemical agent, the mixing reaction temperature is increased to 90-150°C at a heating rate of 1 to 5°C / min. After mixing and reacting for 30-210 minutes, the temperature of the mixing reaction is lowered to 80-90°C, and stabilizers and accelerators are added. After mixing and reacting for 20-60 minutes, dry to obtain a white or light yellow powdery mixture product.

[0033] For the application of the modified sugar reducing agent prepared above in the printing and dyeing industry, the reduction potential o...

Embodiment 1

[0034] Example 1 The raw material quality ratio of the present invention is as follows:

[0035] Sugar: 54.2 kg

[0036] Formaldehyde: 5.5 kg

[0037] Sodium metabisulfite: 15 kg

[0038] Sodium hydroxide: 0.1 kg

[0039] Erythorbic acid: 0.1 kg

[0040] Ethylenediaminetetraacetic acid divalent iron double salt: 0.1 kg

[0041] H 2 O: 25 kg.

[0042]The preparation method of the present invention has the following steps: slowly add formaldehyde (concentration 37%-40%) to the reactor containing sugar, sodium hydroxide and water, control the mixing reaction temperature below 15°C, stir at a speed of 50r / min, and add After the formaldehyde is finished, the mixing reaction temperature is raised to 20°C at a heating rate of 1°C / min. After 30 minutes of reaction, sodium metabisulfite is added. The mixing reaction temperature during the addition is 20°C. After the sulfonating agent is added, the temperature is 1°C. The temperature of the mixed reaction is raised to 90℃ with a heating rat...

Embodiment 2

[0043] Example 2 The raw material quality ratio of the present invention is as follows:

[0044] Raw materials and formula (unit-kg):

[0045] Sugar: 50.8 kg

[0046] Paraformaldehyde: 12.1 kg

[0047] Sodium bisulfite: 15.4 kg

[0048] Sodium acetate: 0.3 kg

[0049] Ascorbic acid: 0.9 kg

[0050] Ethylenediaminetetraacetic acid disodium divalent iron double salt: 0.6 kg

[0051] H 2 O: 19.9 kg.

[0052] The preparation method of the present invention has the following steps: slowly add paraformaldehyde (concentration: 95%-97%) to the reactor containing sugar, sodium acetate, and water, control the mixing reaction temperature below 15°C, and stir at 60r / min After the addition of fatty aldehydes, the temperature of the mixing reaction was raised to 30℃ at a temperature increase rate of 1℃ / min, and sodium bisulfite was added after the mixing reaction for 40 minutes. The mixing reaction temperature during the addition was 30℃, and the sulfonation was completed. After the preparation...

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Abstract

The invention provides a modified white sugar reducer and a preparation method thereof and application thereof in printing and dyeing industry. The preparation method thereof includes the following steps: acetaldehyde (concentration of 40%) is slowly added into a reactor containing white sugar, monosodium orthophosphate and water, the temperature of mixing reaction is controlled to be below 15 DEG C, stirring is carried out at the speed of 75r/min, the temperature of the mixing reaction is heated up to 60 DEG C at the speed of 3 DEG C per minute after fatty aldehyde is added, the mixing reaction is carried out for 65 minutes and then sodium sulfite is added at the temperature of 65 DEG C, the temperature of the mixing reaction is heated up to 120 DEG C at the speed of 2 DEG C per minute after sulfonating agent is added, after the mixing reaction is carried out for 150 minutes the temperature is reduced to 85 DEG C, sodium arabo-ascorbate and succinic acid are added and the mixing reaction is carried out for 45 minutes, and white or straw yellow powdery product is obtained by drying. The product is easy to be dissolved in water, has high chemical durability and low manufacturing cost with environmentally friendly production environment, and has the characteristic of efficient and environmentally friendly application in the printing and dyeing industry.

Description

Technical field [0001] The invention belongs to the field of printing and dyeing auxiliary agents in fine chemicals, and particularly relates to a modified white sugar reducing agent, a preparation method thereof, and its application in the printing and dyeing industry. Background technique [0002] Reducing agents have been widely used in printing and dyeing. Currently, sodium sulfide, sodium sulfide, thiourea dioxide and their mixtures, β-mercaptoethanol, stannous chloride, etc. are widely used. However, the sulphur powder will ignite spontaneously, especially after it absorbs moisture, it will naturally heat up and burn. The storage stability is very poor, and it will decompose in the air, causing the active ingredients to continue to decline; and when it is used for stripping, it will release sulfur dioxide gas, which is harmful to human health. . The survey results show that the harm of insurance powder to the human body is mainly manifested as damage to the upper respirator...

Claims

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Application Information

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IPC IPC(8): D06P1/48D06P1/30D06P1/22
Inventor 刘明华刘剑锋蒋晓丽叶莉
Owner FUZHOU UNIV
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