Unlock instant, AI-driven research and patent intelligence for your innovation.

Ureido-pentane sulfinate and preparation method thereof

A technology of ureido pentane sulfinate and dithionite, which is applied in the field of ureido pentane sulfinate and its preparation, can solve the problems of reduced yield, achieve mild reaction, simple production process, The effect of short production cycles

Active Publication Date: 2012-04-18
FUZHOU UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Filby et al. used thiols to oxidize sulfinates by weak oxidants at lower temperatures. However, Marvel et al. pointed out that when thiols were in excess, the product sulfinates could react with thiols to obtain disulfides, making the yield reduce

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ureido-pentane sulfinate and preparation method thereof
  • Ureido-pentane sulfinate and preparation method thereof
  • Ureido-pentane sulfinate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Specific steps are as follows:

[0028] Raw material and formula (unit-kg):

[0029] Sodium dithionite: 36 kg

[0030] Glutaraldehyde (50% content): 40.5 kg

[0031] Urea: 12.4 kg

[0032] Sodium hydroxide: 0.8 kg

[0033] Ethylene glycol: 0.5 kg

[0034] h 2 O: 9.8 kg.

[0035] Process steps and process parameters: Slowly add glutaraldehyde into the reactor containing ethylene glycol, sodium dithionite, 0.7 kg of sodium hydroxide, and water, control the temperature below 15°C, stir at a speed of 50r / min, and complete the feeding Afterwards, the temperature was raised to 18°C, and urea and 0.1 kg of sodium hydroxide were added after reacting for 30 minutes. After adding the materials, the temperature was raised to 45°C, and after reacting for 55 minutes, vacuum-dried to obtain white ureidopentane with a purity of 83.5%. Sodium sulfinate powder. At 25°C: under the condition of 5.0g / L reducing agent, its reduction potential is -11mV; under the condition of 5.0g / L ...

Embodiment 2

[0037] Specific steps are as follows:

[0038] Raw material and formula (unit-kg):

[0039] Zinc dithionite: 31.5 kg

[0040] Glutaraldehyde (25% content): 49.4 kg

[0041] Urea: 12 kg

[0042] Sodium carbonate: 1.9 kg

[0043] Propylene glycol: 0.2 kg

[0044] h 2 O: 5 kg.

[0045] Process steps and process parameters: Slowly add glutaraldehyde into the reactor containing propylene glycol, zinc dithionite, 1.6 kg of sodium carbonate, and water, control the temperature below 15°C, stir at a speed of 300r / min, and complete the feeding Afterwards, the temperature was raised to 25°C, and urea and 0.3 kg of sodium carbonate were added after reacting for 50 minutes. After the addition, the temperature was raised to 55°C, and after reacting for 60 minutes, vacuum-dried to obtain white ureidopentane with a purity of 87%. Zinc sulfinate powder. At 25°C: under the condition of 5.0g / L reducing agent, its reduction potential is -13mV; under the condition of 5.0g / L reducing agent+...

Embodiment 3

[0047] Specific steps are as follows:

[0048] Raw material and formula (unit-kg):

[0049] Potassium dithionite: 35.8 kg

[0050] Glutaraldehyde (50% content): 37.5 kg

[0051] Urea: 10.5 kg

[0052] Potassium carbonate: 2.3 kg

[0053] Butanediol: 0.3 kg

[0054] h 2 O: 13.6 kg.

[0055]Process steps and process parameters: Slowly add glutaraldehyde into the reactor containing butanediol, potassium dithionite, 1.8 kg of potassium carbonate, and water, control the temperature below 15°C, stir at a speed of 65r / min, and feed After completion, the temperature will be raised to 28°C, after 60 minutes of reaction, urea and 0.5 kg of potassium carbonate will be added, after the addition of materials, the temperature will be raised to 60°C, and after 70 minutes of reaction, vacuum drying will give white ureidopentane with a purity of 88%. Potassium sulfinate powder. At 25°C: under the condition of 5.0g / L reducing agent, its reduction potential is -15mV; under the condition ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a ureido-pentane sulfinate and a preparation method thereof, wherein the ureido-pentane sulfinate is white powder and has good chemical stability; and the preparation method comprises the following steps: hyposulphite is used for generatting hyposulfite in alkaline condition and then glutaric dialdehyde and carbamide are added to synthetize the ureido-pentane sulfinate. Theproduct of the invention does not generate hazardous and noxious sulfur dioxide, formaldehyde or hydrogen sulphide gas at high temperature and in alkaline condition, and simultaneously has very high negative reduction potential; the chemical property of the prepared product is similar to that of formaldehydesulfoxylate as far as possible; and the product solves the problem of the existing reducing agents such as rongalite C and rongalite that sulfur dioxide, formaldehyde and other hazardous and noxious gases are released at high temperature and in alkaline condition.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a ureido pentane sulfinate and a preparation method thereof. Background technique [0002] In the chemical and printing and dyeing industries, reducing agent is a kind of chemical auxiliary with large amount and wide application. At present, the reducing agents used at home and abroad mainly include sodium hydrosulfite, sodium sulfide, diaoba powder, degulin and thiourea dioxide. Among them, sodium hydrosulfite, dibafen, degulin, and thiourea dioxide are all sulfinate reducing agents. In addition, Rongalite FD and Rongal A products produced by BASF also belong to this kind of substances, and the composition of Rongalite FD is about NH(CH 2 SO 2 Na) 2 with N(CH 2 SO 2 Na) 3 A mixture of vat dyes, which was used in the dyeing of vat dyes, but the color yield is low; the component of Rongal A is NaN(CH 3 CHSO 2 ) 3 , Soluble in water, more stable than hydrosulfite ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C313/04
Inventor 刘明华刘剑锋叶莉
Owner FUZHOU UNIV