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Sulfonated tannin extract and preparation method thereof

A technology for sulfonated tannin extract and tannin extract, which is applied in the field of sulfonated tannin extract and its preparation, can solve the problems of low sulfonation efficiency and further improvement of compatibility effect, and achieve the effects of low pollution, high compatibility effect and high content

Active Publication Date: 2017-08-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of sulfonated tannin extract, thus solve the problems of low sulfonation efficiency in the preparation of sulfonated tannin extract in the prior art, and the compatibility effect with SMP resin needs to be further improved

Method used

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  • Sulfonated tannin extract and preparation method thereof
  • Sulfonated tannin extract and preparation method thereof
  • Sulfonated tannin extract and preparation method thereof

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Embodiment 1

[0038] The sulfonated tannin extract of this embodiment is prepared by the following steps:

[0039] 1) Add 100g of tannin extract powder to 900g of deionized water at 65°C under stirring, heat and stir for 30min, then let stand for 24h and then filter, discard the insoluble matter to obtain a purified solution;

[0040] 2) Add 30 g of sodium hydroxide to the purified solution, then add 5 g of formaldehyde solution with a mass concentration of 30%, and react at 90° C. for 0.5 h to obtain a methylation solution;

[0041] 3) Add 8 g of sodium bisulfite to the methylation solution, and react at 90° C. for 4 hours to obtain a sulfonation solution;

[0042] 4) Add 1 g of titanium sulfate solution with a mass concentration of 25% to the sulfonation solution, react at 90° C. for 0.5 h, concentrate and granulate to obtain sulfonated tannin extract for SMP resin quality evaluation test.

Embodiment 2

[0044] The sulfonated tannin extract of this embodiment is prepared by the following steps:

[0045] 1) Add 100g of tannin extract powder to 1000g of deionized water at 60°C under stirring, heat and stir for 30min, then let stand for 24h and then filter, discard the insoluble matter to obtain a purified solution;

[0046] 2) Add 30 g of sodium hydroxide to the purified solution, then add 6 g of formaldehyde solution with a mass concentration of 30%, and react at 90° C. for 0.5 h to obtain a methylation solution;

[0047] 3) Add 9 g of sodium bisulfite to the methylation solution, and react at 90° C. for 4 hours to obtain a sulfonation solution;

[0048] 4) Add 2 g of titanium sulfate solution with a mass concentration of 30% to the sulfonation solution, react at 90° C. for 0.5 h, concentrate and granulate to obtain sulfonated tannin extract for SMP resin quality evaluation test.

Embodiment 3

[0050] The sulfonated tannin extract of this embodiment is prepared by the following steps:

[0051] 1) Add 100g of tannin extract powder to 1200g of deionized water at 70°C under stirring, heat and stir for 30min, let stand for 24h, filter, discard insoluble matter, and obtain a purified solution;

[0052] 2) Add 30 g of sodium hydroxide to the purified solution, then add 7 g of formaldehyde solution with a mass concentration of 30%, and react at 90° C. for 0.5 h to obtain a methylation solution;

[0053] 3) Add 10 g of sodium bisulfite to the methylation solution, and react at 90° C. for 4 hours to obtain a sulfonation solution;

[0054] 4) Add 3 g of titanium sulfate solution with a mass concentration of 30% to the sulfonation solution, react at 90° C. for 0.5 h, concentrate and granulate to obtain sulfonated tannin extract for SMP resin quality evaluation test.

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Abstract

The invention relates to a sulfonated tannin extract and a preparation method thereof. The preparation method of the sulfonated tannin extract comprises the following steps of (1) mixing tannin extract powder with water and filtering to obtain a purified liquid; (2) adding a methylating agent to the purified liquid for methylation reaction to obtain a methylated solution; (3) adding a sulfonating agent to the methylated solution for sulfonation reaction to obtain a sulfonated solution; and (4) adding a metal salt complexing agent to the sulfonated solution for chelation reaction. According to the sulfonated tannin extract, a soluble matter in the tannin extract is extracted to participate into subsequent methylation reaction and sulfonation reaction in the purification process in the step (1), so that the subsequent reaction efficiency is improved, the dosage of the methylating agent and the sulfonating agent is reduced, the obtained sulfonated tannin extract is high in tannic acid content, the influence of an insoluble matter in the tannin extract on the compatibility effect of SMP resin is avoided and the stability of a quality evaluation test of the SMP resin is improved.

Description

technical field [0001] The invention belongs to the field of quality inspection of sulfomethyl phenolic resin (SMP) for drilling fluid, and in particular relates to a sulfonated tannin extract and a preparation method thereof. Background technique [0002] With the increase of formation drilling depth, the downhole temperature and pressure gradually increase, and more and more people pay more and more attention to high-efficiency high-temperature-resistant drilling fluids. Three-sulfur drilling fluid is one of the most important high-temperature drilling fluid systems at present, and sulfomethyl phenolic resin (SMP) is the core chemical for preparing three-sulfur drilling fluid, and the drilling fluid prepared with qualified sulfomethyl phenolic resin as the main agent , can maintain good fluid loss control performance in the formation environment above 180°C, but if the product quality of the sulfomethyl phenolic resin used is not up to standard, it will easily lead to a de...

Claims

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Application Information

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IPC IPC(8): C09F1/04C09K8/035
CPCC09F1/04C09K8/035
Inventor 孙明卫何卫谢勇军王振华刘军王小卫白秋红孙桂春
Owner CHINA PETROLEUM & CHEM CORP
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