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Lignosulfonate for drilling fluid and lignosulfonate preparation method

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

Inactive Publication Date: 2015-09-09
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, The preparation method of lignosulfonate for drilling fluid will generate calcium sulfate waste residue 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

[0042] 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.

[0043] 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.

[0044] 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

[0052] Grind 100g corncobs, add 6.5g sulfurous acid, 1.5g oxalic acid, 0.55g sodium sulfite to hydrolyze at 160°C and 0.5Mpa, after hydrolysis, separate solid and liquid to obtain sugar liquid and xylose residue; combine sugar liquid and xylose residue Add four times of 100°C water for washing, and after solid-liquid separation, sugar liquid and xylose residue are obtained; combine the sugar liquid, add twice the 100°C water for washing the xylose residue, and obtain xylose residue and sugar liquid after solid-liquid separation.

[0053] 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.

[0054] 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 carb...

Embodiment 3

[0062] 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.

[0063] 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.

[0064] 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 activate...

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Abstract

The invention provides lignosulfonate for drilling fluid and a lignosulfonate preparation method. The lignosulfonate is obtained by mixed reaction of a complexing agent and sodium lignin sulfonate prepared from liquid glucose. By selection of special sodium salt of lignosulfonate and taking of the sodium lignin sulfonate prepared from liquid glucose as a starting material, the prepared lignosulfonate for drilling fluid has an excellent mud property no matter at the normal temperature or the high temperature, and generation of harmful waste residues in a preparation process is avoided.

Description

technical field [0001] The invention relates to a lignosulfonate for drilling fluid 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, The method for preparing lignosulfonate for drilling fluid will generate calcium sulfate waste residue 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 the preparation process 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...

Claims

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Application Information

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IPC IPC(8): C08H7/00C09K8/035
Inventor 唐一林江成真高绍丰宁辉张茜刘洁
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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