Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for producing high-concentration efficient naphthalene water reducer by virtue of binary azeotropic method
The invention provides a method of producing high-concentration efficient naphthalene water reducer by virtue of a binary azeotropic method. The method comprises the following steps of sulfonation, hydrolysis, condensation, neutralization and the like, wherein during sulfonation, much sulfonic acid as possible can be converted into sulfonic acid groups so that free sulfate ions in a product are decreased to the lowest level and the water phase in the product is reduced by virtue of binary azeotropic method, the production of 2-naphthalene sulfonic acid is increased and the yield is also increased; during condensation, a process for recovering formaldehyde is added and thus the cost is reduced, the emission of formaldehyde is decreased and the environment friendliness is achieved; furthermore, since the sulfate ions are controlled in the sulfonation stage, lime does not need to be added in the later process to remove the sulfate ions and thus the process is greatly simplified, the production time is shortened, the cost is saved again and no solid wastes can be generated which is conductive to environmental protection. The process provided by the invention is superior to the traditional process in terms of production efficiency, economic efficiency, environmental protection and the like.
Method for producing high-concentration efficient naphthalene water reducer by virtue of binary azeotropic method
The invention provides a method of producing high-concentration efficient naphthalene water reducer by virtue of a binary azeotropic method. The method comprises the following steps of sulfonation, hydrolysis, condensation, neutralization and the like, wherein during sulfonation, much sulfonic acid as possible can be converted into sulfonic acid groups so that free sulfate ions in a product are decreased to the lowest level and the water phase in the product is reduced by virtue of binary azeotropic method, the production of 2-naphthalene sulfonic acid is increased and the yield is also increased; during condensation, a process for recovering formaldehyde is added and thus the cost is reduced, the emission of formaldehyde is decreased and the environment friendliness is achieved; furthermore, since the sulfate ions are controlled in the sulfonation stage, lime does not need to be added in the later process to remove the sulfate ions and thus the process is greatly simplified, the production time is shortened, the cost is saved again and no solid wastes can be generated which is conductive to environmental protection. The process provided by the invention is superior to the traditional process in terms of production efficiency, economic efficiency, environmental protection and the like.
Method for producing high-concentration efficient naphthalene water reducer by virtue of binary azeotropic method
SHI JUN (Autor:in) / GUO CHANGSHUN (Autor:in)
08.04.2015
Patent
Elektronische Ressource
Englisch
IPC:
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C07C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
,
Acyclische oder carbocyclische Verbindungen
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