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Preparation method of biological adsorbent for separating sodium cyclamate

A biosorbent and sodium cyclamate technology, applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry, etc., can solve the problems of easy to exceed the standard use, low sweetness, low cost, etc., and achieve easy backwashing, acid resistance, etc. Good properties and alkali resistance, low production cost

Inactive Publication Date: 2020-08-18
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of cyclamate is that it has better sweetness, lower bitterness than saccharin, and lower cost; the disadvantage is that the sweetness is not high, the dosage is large, and it is easy to use beyond the standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Seaweed fiber pretreatment: In the reactor, add deionized water: 760 mL, ammonium carbonate: 100 g, urea: 60 g, mix well, add seaweed fiber: 80 g, soak at room temperature for 20 h, heat up to 65 ~70°C, constant temperature reaction for 40min, solid-liquid separation, washing with deionized water, drying to obtain pretreated seaweed fiber;

[0022] (2) Preparation of surface-modified seaweed fiber: In the reactor, add deionized water: 740 mL, thioglycolic acid: 120 g, sodium sulfide: 60 g, sulfuric acid: 1.0 mL, stir and dissolve, add pre-treated seaweed fiber: 90 g, The temperature was raised to 45±2°C and kept at a constant temperature, refluxed for 6 hours, separated from solid and liquid, washed with deionized water, and dried to obtain surface-modified seaweed fibers;

[0023] (3) Preparation of biosorbent for separating cyclamate: In the reactor, add deionized water: 860 mL, silver nitrate: 80 g, stir to dissolve, add surface modified seaweed fiber: 60 g, adju...

Embodiment 2

[0025] (1) Seaweed fiber pretreatment: In the reactor, add deionized water: 740 mL, ammonium carbonate: 120 g, urea: 80 g, mix well, add seaweed fiber: 60 g, soak at room temperature for 20 h, heat up to 65 ~70°C, constant temperature reaction for 40min, solid-liquid separation, washing with deionized water, drying to obtain pretreated seaweed fiber;

[0026] (2) Preparation of surface-modified seaweed fiber: In the reactor, add deionized water: 720 mL, thioglycolic acid: 140 g, sodium sulfide: 70 g, sulfuric acid: 0.5 mL, stir and dissolve, add pre-treated seaweed fiber: 70 g, The temperature was raised to 45±2°C and kept at a constant temperature, refluxed for 6 hours, separated from solid and liquid, washed with deionized water, and dried to obtain surface-modified seaweed fibers;

[0027] (3) Preparation of biosorbent for separating cyclamate: In the reactor, add deionized water: 880 mL, silver nitrate: 70g, stir to dissolve, add surface modified seaweed fiber: 50g, adjust...

Embodiment 3

[0029] (1) Seaweed fiber pretreatment: In the reactor, add deionized water: 780 mL, ammonium carbonate: 80 g, urea: 50 g, mix well, add seaweed fiber: 90 g, soak at room temperature for 20 h, heat up to 65 ~70°C, constant temperature reaction for 40min, solid-liquid separation, washing with deionized water, drying to obtain pretreated seaweed fiber;

[0030] (2) Preparation of surface-modified seaweed fiber: In the reactor, add deionized water: 730 mL, thioglycolic acid: 130 g, sodium sulfide: 80 g, sulfuric acid: 1.5 mL, stir and dissolve, add pre-treated seaweed fiber: 60 g, The temperature was raised to 45±2°C and kept at a constant temperature, refluxed for 6 hours, separated from solid and liquid, washed with deionized water, and dried to obtain surface-modified seaweed fibers;

[0031] (3) Preparation of biosorbent for separating cyclamate: In the reactor, add deionized water: 850 mL, silver nitrate: 100 g, stir to dissolve, add surface modified seaweed fiber: 50 g, adju...

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Abstract

The invention discloses a preparation method of a biological adsorbent for separating sodium cyclamate, which is characterized by comprising the following steps: pretreating alginate fibers by using ammonium carbonate and urea to obtain pretreated alginate fibers; then, using mercaptoacetic acid and sodium sulfide for carrying out surface modification on the pre-treated alginate fibers under the sulfuric acid condition to obtain surface-modified alginate fibers; finally, in a reactor, adding 85-88% of deionized water and 7-10% of silver nitrate in percentage by mass, stirring for dissolving, adding 4-6% of surface modified alginate fiber, regulating the pH value to 2-3 with dilute nitric acid, soaking at room temperature for 24 hours, carrying out solid-liquid separation, washing with deionized water, and drying to obtain the biological adsorbent for separating sodium cyclamate. The adsorbing material has the advantages of selective adsorption on sodium cyclamate, good mechanical property, good chemical stability, high adsorption speed, easiness in elution and regeneration capacity.

Description

technical field [0001] The invention relates to a preparation method and application technology of an adsorption material, in particular to a preparation method and application of a bioadsorbent for separating cyclamate, and belongs to the technical field of separation material application. Background technique [0002] Cyclamate, whose chemical name is sodium cyclamate, is a commonly used additive in food production. Cyclamate is a commonly used sweetener, and its sweetness is 30 to 40 times that of sucrose. Molecular formula C 6 h 12 NNaO 3 S, molecular weight 201.2. White crystal or white crystalline powder, odorless, sweet taste, easily soluble in water, insoluble in ethanol, insoluble in chloroform and ether. Slightly decomposed under acidic conditions, stable under alkaline conditions. It is a non-nutritive sweetener with a bitter taste when the concentration is greater than 0.4%. The oral median lethal dose for mice is 18g / kg. In June 1984, the Cancer Identifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C07C303/44C07C307/02
CPCB01J20/0233B01J20/0259B01J20/0266B01J20/0277B01J20/0296B01J20/045B01J20/22B01J20/24C07C303/44C07C2601/14C07C307/02
Inventor 许崇娟李慧芝李志英
Owner UNIV OF JINAN
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