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Aminocyclodextrin, and preparation method and application thereof

A cyclodextrin and amine-based technology, applied in the field of cyclodextrin, achieves the effects of mild reaction conditions, simple process, and good inhibitory performance

Active Publication Date: 2017-02-22
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the application of modified cyclodextrin in drilling fluid used in petroleum exploration and development has not been reported

Method used

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  • Aminocyclodextrin, and preparation method and application thereof
  • Aminocyclodextrin, and preparation method and application thereof
  • Aminocyclodextrin, and preparation method and application thereof

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preparation example Construction

[0032] The present invention provides a method for preparing the aminocyclodextrin described in the above technical scheme, comprising:

[0033] The β-cyclodextrin solution, the chlorinated epoxide and the acidic catalyst are reacted to obtain an intermediate product, and the β-cyclodextrin has the structure shown in formula III:

[0034]

[0035] The chlorinated epoxides include epichlorohydrin or 1,2-epoxychlorobutane;

[0036] The intermediate product is reacted with an organic amine to obtain an amino cyclodextrin; the organic amine includes ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine or pentaethylenehexamine.

[0037] In an embodiment of the present invention, the reaction temperature of the β-cyclodextrin solution, the chlorinated epoxide and the acidic catalyst is 95° C. to 150° C.; in other embodiments, the β-cyclodextrin solution , the reaction temperature of the chlorinated epoxide and the acidic catalyst is 110°C to 140°C; ...

Embodiment 1

[0065] Add 140g of β-cyclodextrin into 200g of water, stir and heat to 80°C to fully dissolve the cyclodextrin to obtain a β-cyclodextrin solution;

[0066] Add 70g of epichlorohydrin and 8g of sulfuric acid to the above-mentioned β-cyclodextrin solution, and react at a temperature of 95°C for 3.0h to obtain an intermediate product;

[0067] Add 60 g of ethylenediamine to the above intermediate product, stir and mix evenly, react at a temperature of 60° C. for 3.0 h, dry the obtained reaction product to remove water, and obtain amino cyclodextrin with a yield of 96.52%.

[0068] The aminocyclodextrin prepared in Example 1 of the present invention has the structure shown in Formula 1:

[0069]

[0070] In formula 1, R is:

[0071]

[0072] Wherein, m is 1, and n is 0.

[0073] According to the method described in the above technical scheme, the primary recovery rate of shale, the relative recovery rate of shale, and the extreme pressure lubrication coefficient of the am...

Embodiment 2

[0075] Add 160g of β-cyclodextrin into 210g of water, stir and heat to 80°C to fully dissolve the cyclodextrin to obtain a β-cyclodextrin solution;

[0076] Add 80g of 1,2-epoxychlorobutane and 9g of p-toluenesulfonic acid to the above β-cyclodextrin solution, and react at a temperature of 100°C for 4.0h to obtain an intermediate product;

[0077] Add 70 g of diethylenetriamine to the above intermediate product, stir and mix evenly, react at a temperature of 70° C. for 4.0 h, dry the obtained reaction product to remove water, and obtain amino cyclodextrin with a yield of 97.32%.

[0078] The aminocyclodextrin prepared in Example 2 of the present invention has the structure shown in formula 2:

[0079]

[0080] In formula 2, R is:

[0081]

[0082] Wherein, m is 2, and n is 1.

[0083] According to the method described in the above technical scheme, the primary recovery rate of shale, the relative recovery rate of shale, and the extreme pressure lubrication coefficient ...

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Abstract

The invention provides an aminocyclodextrin. The aminocyclodextrin has a structure represented by formula I; and R in the formula I is a group having a structure represented by formula II, m in the formula II is 1~2, and n in the formula II is 0~4. The invention also provides a preparation method of the aminocyclodextrin. The preparation method comprises the following steps: carrying out a reaction on a beta-cyclodextrin solution, chloroepoxide and an acidic catalyst to obtain an intermediate; and carrying out a reaction on the intermediate and organic amine to obtain the aminocyclodextrin. An amino group is introduced to the primary hydroxyl group of cyclodextrin to obtain star-shaped aminocyclodextrin, and the aminocyclodextrin has good inhibition performances, lubrication performances and filter loss reduction performances. The aminocyclodextrin can be applied to drilling fluids, can be used as a shale inhibitor, a lubricant and a filter loss reducer of the drilling fluids to make the drilling fluids have good inhibition performances, lubrication performances and filter loss reduction performances.

Description

technical field [0001] The invention relates to the technical field of cyclodextrin, in particular to an amino cyclodextrin and its preparation method and application. Background technique [0002] Cyclodextrin is a general term for a series of cyclic oligosaccharides produced by amylose under the action of cyclodextrin glucosyltransferase, usually containing 6 to 12 D-glucopyranose units; Most and of great practical significance are cyclodextrins containing molecules of 6, 7, and 8 D-glucopyranose units, called α-cyclodextrin, β-cyclodextrin and γ-cyclodextrin, respectively. At present, cyclodextrin is widely used in medicine, analytical chemistry, daily chemical industry, environmental protection, agriculture and other fields. In order to overcome the shortcomings of cyclodextrin itself, researchers have tried to modify cyclodextrin in different ways. The molecular structure of cyclodextrin presents a hollow cylindrical structure with a wide top and narrow bottom, open en...

Claims

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Application Information

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IPC IPC(8): C08B37/16C09K8/035
Inventor 司西强王中华魏军吕跃滨
Owner 中石化石油工程技术服务有限公司