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Preparation method and application of N, N-disubstituted sulfamic acid compound

A technology of dihydroxyalkylaminosulfonic acid and dimerized alkoxyaminosulfonic acid, which is applied in the field of chemical industry and can solve problems such as loss of predetermined functions and inability to achieve predetermined functions.

Pending Publication Date: 2022-03-18
NANJING BAOCHUN CHEMICAL INDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During cement grinding, the process environment temperature of these substances may be as high as 230°C, and the cement admixture suddenly enters a high-temperature environment from normal temperature, which will inevitably cause sudden vaporization and loss, or react and convert to other substances, making it impossible to realize part of the process. Predetermined function, in severe cases, will lose all its predetermined functions

Method used

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  • Preparation method and application of N, N-disubstituted sulfamic acid compound
  • Preparation method and application of N, N-disubstituted sulfamic acid compound
  • Preparation method and application of N, N-disubstituted sulfamic acid compound

Examples

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Embodiment 1

[0054] In this embodiment, sodium sulfamate is used as a substrate to react with ethylene oxide to make sodium dihydroxyethylsulfamate.

[0055] Concrete preparation process is as follows:

[0056] 200 grams, configured as a 55% aqueous solution with deionized water, was put into the reactor; vacuumized to -0.01Mpa, replaced with nitrogen to normal pressure, heated to 40°C, and then 74 grams of ethylene oxide was introduced step by step, React while stirring, and control the temperature in the kettle. As the reaction progresses, the pressure in the reactor first increases and then decreases until the pressure in the reactor is reduced to 0.01Mpa; While reacting, the temperature in the kettle is controlled at 80°C. During the reaction, the pressure in the reactor first increases and then decreases. After the pressure in the kettle drops to 0.01Mpa, keep it warm for 2 hours, vacuumize, discharge, and dry at 110°C , to obtain the product sodium dihydroxyethylsulfamate as a pale ...

Embodiment 2

[0059] In this embodiment, sodium sulfamate is used as a substrate to react with propylene oxide to prepare sodium dihydroxypropylsulfamate.

[0060] Concrete preparation process is as follows:

[0061] Put 200 grams of sodium sulfamate into a 55% aqueous solution with deionized water, and put it into the reactor; vacuumize to -0.01Mpa, replace it with nitrogen to normal pressure, raise the temperature to 50°C, and then introduce propylene oxide step by step 97.6 grams, react while stirring, control the temperature in the still, along with the carrying out of reaction, the pressure in the reaction still first increases and then decreases, until the pressure in the still is reduced to 0.01Mpa; then pass into 102.4 grams of propylene oxide step by step, React while stirring. The temperature in the kettle is controlled at 85°C. During the reaction, the pressure in the reactor first increases and then decreases. After the pressure in the kettle drops to 0.01Mpa, keep it warm for 2...

Embodiment 3

[0064] In this example, sodium sulfamate is used as a substrate, which is reacted with propylene oxide and ethylene oxide in sequence to prepare sodium N,N-hydroxyethyl hydroxypropyl sulfamate.

[0065] Concrete preparation process is as follows:

[0066] Put 200 grams of sodium sulfamate into a 55% aqueous solution with deionized water, and put it into the reactor; vacuumize to -0.01Mpa, replace it with nitrogen to normal pressure, raise the temperature to 50°C, and then introduce propylene oxide step by step 97.6 grams, react while stirring, control the temperature in the kettle, as the reaction proceeds, the pressure in the reactor first increases and then decreases, until the pressure in the kettle is reduced to 0.01Mpa; then feed 77.7 grams of ethylene oxide step by step , react while stirring, the temperature in the kettle is controlled at 75°C, during the reaction process, the pressure in the reactor first increases and then decreases, until the pressure in the kettle i...

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Abstract

The invention discloses a preparation method of an N, N-disubstituted sulfamic acid compound, which specifically comprises the following steps: by taking a sulfamic acid compound as a substrate, carrying out addition reaction on the sulfamic acid compound and alkylene oxide to prepare the N, N-disubstituted sulfamic acid compound, and reacting the N, N-disubstituted sulfamic acid compound with the alkylene oxide to prepare the N, N-disubstituted sulfamic acid compound. The N, N-disubstituted sulfamic acid compound is a dihydroxyalkyl sulfamic acid compound or a dimer alkoxy sulfamic acid compound. The invention also discloses an application of the N, N-disubstituted sulfamic acid compound prepared by the method. In the invention, sulfamic acid or salt or ester is used as a substrate and is subjected to addition condensation with alkylene oxide. The method has the advantages of easily available raw materials, low cost, short synthesis route, mild process conditions and simple post-treatment.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a preparation method and application of N,N-disubstituted sulfamic acid compounds. Background technique [0002] Cement admixtures usually refer to cement admixtures mainly composed of small molecular organic surfactants, which are additives composed of one or several surface active substances with organic small molecular organic surfactants containing polar groups as the core. , These additives have the characteristics of small dosage and strong functions, and are called "industrial monosodium glutamate". [0003] Cement admixtures are usually based on alcohol amines, alcohols, or their derivatives, compounded with other chemical raw materials, such as ethanolamine, methyldiethanolamine, isopropanolamine, ethylene glycol, glycerol, diethylene glycol And wood calcium and other components. [0004] Cement admixtures can not only significantly increase the output per hour of cement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26C07C303/34C07C307/02
CPCC08G65/2636C08G65/2696C07C303/34C07C307/02
Inventor 李国华陈云龙张书王来柱
Owner NANJING BAOCHUN CHEMICAL INDUSTRY CO LTD
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