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Iron-chromium sodium lignin sulfonate and preparation method thereof

A technology of sodium lignosulfonate and iron-chromium, applied in chemical instruments and methods, drilling compositions and other directions, can solve problems such as residual chromium ions, environmental pollution, etc., and achieve the effect of good mud performance

Inactive Publication Date: 2015-10-21
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lignosulfonate for drilling fluid is a commonly used thinner for drilling mud. The traditional preparation method is to prepare by mixing papermaking waste liquid calcium lignosulfonate with ferrous sulfate, sulfuric acid and sodium dichromate; however, Calcium sulfate waste residue will be generated through this preparation method and a certain amount of chromium ions will remain in the waste residue. Such residue is difficult to be used and will cause environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 100g of corncobs were crushed, added with 8g of sulfurous acid, 1.4g of phosphoric acid, and 0.5g of sodium sulfite to hydrolyze at 140°C and 0.5Mpa. After the hydrolysis was completed, the solid and liquid were separated to obtain sugar liquid and xylose residue; Washing at 100°C twice as much, and after solid-liquid separation, sugar liquid and xylose residue are obtained; combined sugar liquid, xylose residue is washed with twice 100°C water, and xylose residue and sugar liquid are obtained after solid-liquid separation.

[0062] Concentrate the obtained sugar solution to a solution with a solid content of 45 wt%, and then settle at 50°C for 48 hours, and add sodium hydroxide at 55°C for neutralization reaction to obtain a solution with a pH value of 5.

[0063] The obtained solution with a pH of 5 is subjected to plate-and-frame filtration twice at a temperature of 50°C. The pre-coating agent for the plate-and-frame filter is diatomaceous earth and waste activated ca...

Embodiment 2

[0073] 200g of corncobs were crushed, added 13g of sulfurous acid, 3g of oxalic acid, and 1.1g of sodium sulfite to hydrolyze at 160°C and 0.5Mpa. After the hydrolysis was completed, the solid and liquid were separated to obtain sugar liquid and xylose residue; Washing at 100°C twice as much, and after solid-liquid separation, sugar liquid and xylose residue are obtained; combined sugar liquid, xylose residue is washed with twice 100°C water, and xylose residue and sugar liquid are obtained after solid-liquid separation.

[0074] Concentrate the obtained sugar solution to a solution with a solid content of 45 wt%, and then settle at 50°C for 48 hours, and add sodium hydroxide at 55°C for neutralization reaction to obtain a solution with a pH value of 5.

[0075] The obtained solution with a pH of 5 is subjected to plate-and-frame filtration twice at a temperature of 50°C. The pre-coating agent for the plate-and-frame filter is diatomaceous earth and waste activated carbon, and ...

Embodiment 3

[0085] 300g of corncobs were crushed, added 10g of sulfurous acid, 5g of sulfuric acid, and 1.3g of sodium sulfite to hydrolyze at 150°C and 0.6Mpa. After the hydrolysis was completed, the solid and liquid were separated to obtain sugar liquid and xylose residue; Washing at 100°C twice as much, and after solid-liquid separation, sugar liquid and xylose residue are obtained; combined sugar liquid, xylose residue is washed with twice 100°C water, and xylose residue and sugar liquid are obtained after solid-liquid separation.

[0086] The obtained sugar solution was concentrated to a solution with a solid content of 45 wt%, and then settled at 50°C for 48 hours, and sodium hydroxide was added at 55°C for neutralization reaction to obtain a solution with a pH value of 4.

[0087] The obtained solution with a pH of 4 is subjected to plate-and-frame filtration twice at a temperature of 50°C. The pre-coating agent for the plate-and-frame filter is diatomaceous earth and waste activate...

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Abstract

The invention provides iron-chromium sodium lignin sulfonate and a preparation method thereof. Sodium lignin sulfonate prepared through a sulfate method, a sugar solution and a complexing agent are mixed for a reaction, and the iron-chromium sodium lignin sulfonate can be obtained, wherein sodium salt in specific lignosulfonate is selected, mixtures of the sugar solution and the sodium lignin sulfonate prepared through the sulfate method serve as initial raw materials, and the prepared iron-chromium sodium lignin sulfonate has very good mud property at both normal temperature and high temperature.

Description

technical field [0001] The invention relates to sodium iron chromium lignosulfonate and a preparation method thereof. Background technique [0002] Lignosulfonate for drilling fluid is a commonly used thinner for drilling mud. The traditional preparation method is to prepare by mixing papermaking waste liquid calcium lignosulfonate with ferrous sulfate, sulfuric acid and sodium dichromate; however, Calcium sulfate waste residue will be generated through the preparation method, and a certain amount of chromium ions will remain in the waste residue. Such residue is difficult to be used and will cause environmental pollution. Therefore, seeking a lignosulfonate for drilling fluid with good mud performance under high temperature conditions and no harmful waste residues in its preparation method is a technical problem that needs to be solved at present. Contents of the invention [0003] In view of this, the technical problem to be solved by the present invention is to provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00C09K8/035
Inventor 唐一林江成真宁辉高绍丰张茜牛延辉
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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