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Plant heteropolysaccharide sulfonate, as well as preparation method and application thereof

A sugar sulfonate and heteropolysaccharide technology, which is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve the problem of excessive dosage, non-degradable chemicals, secondary pollution, etc. problems, to achieve the effect of wide source of raw materials and obvious scale inhibition effect

Inactive Publication Date: 2014-12-10
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They have the following disadvantages: 1. When the pH>7.5 or pH2+ Generate calcium phosphate scale; 2. Provide rich nutrients for algae, resulting in a large number of bacteria and algae, bringing new problems of sterilization and algae to the system; 3. The hydrolysis speed increases with the increase of concentration and temperature. When it exceeds 90°C, it will undergo hydrolysis like inorganic polyphosphate, and its hydrolyzed product will react with divalent metal cations to form scale. 4. Many properties are similar to phosphate, and the dosage should not be too high, otherwise it is easy to form scale; It adheres to the surface of the equipment and is prone to emulsification with oil. It needs to add anti-emulsifier when used in oil fields; 6. The agent is not degradable and will cause secondary pollution

Method used

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  • Plant heteropolysaccharide sulfonate, as well as preparation method and application thereof
  • Plant heteropolysaccharide sulfonate, as well as preparation method and application thereof
  • Plant heteropolysaccharide sulfonate, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take fresh and mature corn stalks from the North China Plain, cut them into sections about 50 cm long, rinse them with tap water and distilled water in turn, and dry them in a blast drying oven at 60 °C to constant weight; then cut the dried corn stalks into 1cm-long fragments, using water as the extraction solution, leaching with 30mL deionized water per gram of corn stalks, the extraction temperature is 90°C, continuous extraction for 2.5h, collecting and filtering the extraction solution from the corn stalk residue, and refilling the residue with Repeat the leaching 2~3 times under the same conditions; collect 1000ml of the extract, and carry out rotary evaporation and concentration until the volume is 100mL, add 20mL of sevag solution to extract and separate and remove a small amount of protein components in the concentrate; then add 50mL of twice the volume of the concentrate Precipitation was separated with absolute ethanol, and the precipitate was collected by fil...

Embodiment 2

[0045] Other steps are the same as in Example 1, except that the plant heteropolysaccharide raw material is obtained by using 90 mL of absolute ethanol as a precipitating agent to precipitate the product, and n in its structure is 10. The degree of substitution DS of the sulfonated product was measured to be 1.87.

Embodiment 3

[0047] The other steps were the same as in Example 2, except that 50 mL of absolute ethanol was used as the precipitating agent to precipitate the product, n in the structure was 38, and the degree of sulfonation substitution DS=0.83 was measured.

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Abstract

The invention discloses a plant heteropolysaccharide sulfonate. A preparation method of the plant heteropolysaccharide sulfonate comprises the following steps of: dissolving plant heteropolysaccharide in deionized water, regulating pH to 8.0 by 5% of NaOH at first, then adding a sulfonating agent and elemental iodine, keeping the temperature within 50-80 DEG C to have a reaction for 6-10 hours, cooling the solution to room temperature, using absolute ethyl alcohol to precipitate out a product, then performing centrifugal separation, methanol washing and vacuum drying at 40 DEG C, and finally obtaining sulfonated and modified plant heteropolysaccharide sulfonate, wherein the product is yellow or orange-yellow solid powder. The plant heteropolysaccharide sulfonate disclosed by the invention adopts plant heteropolysaccharide as a raw material, and the raw material is widely sourced, belongs to a regenerative resource, is inexhaustible, causes no secondary pollution and has a remarkable scale inhibition effect when being used for calcium sulfate scale resistance of water. 250mg / L of scale inhibitor is added after scale inhibition is performed for 10 hours in a constant-temperature water bath at 80 DEG C when the initial calcium ion concentration is 1600mg / L, sulfate radical concentration is 3820mg / L and pH is equal to 9.0, and the scale inhibiting ratio of the scale inhibitor is as high as 100%.

Description

technical field [0001] The present invention relates to the sulfonated modification of plant heteropolysaccharides and the research on its application performance in water treatment, in particular to the preparation of a sulfonated modified plant heteropolysaccharide scale inhibitor and its modification with sulfonates Application method of antiscalant. technical background [0002] Plant heteropolysaccharides are a kind of heterosaccharide ring polymeric macromolecular compounds that widely exist in plant straws, roots, fruits and seeds, and are rich in resources and widely distributed. The title: "Crop Straw Resources and Utilization Status in China" (Han Lujia et al., Journal of Agricultural Engineering, 2002, 18 (3): 87~89) reported that the world's annual straw production is about 40×10 8 tons, distributed in Asia, Africa, America and other regions; its molecular structure is composed of a series of five- or six-membered sugar units such as glucose, rhamnose, and arabi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/00C02F5/10
Inventor 张惠欣王枫朱玉超窦倩孙冬雪
Owner HEBEI UNIV OF TECH