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Method for determining content of sodium chloride in hexamethylene 1, 6-disodium dithiosulfate dihydrate

A technology of disodium dithiosulfate and hexamethylene is applied in the field of determination of sodium chloride content and can solve problems such as large error in the method of sodium chloride content

Inactive Publication Date: 2015-03-25
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the invention is to solve the problem that there is a large error in the existing method for measuring sodium chloride content in HTS, and provide a method for measuring sodium chloride content in hexamethylene 1,6-dithiosulfuric acid disodium salt dihydrate

Method used

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  • Method for determining content of sodium chloride in hexamethylene 1, 6-disodium dithiosulfate dihydrate
  • Method for determining content of sodium chloride in hexamethylene 1, 6-disodium dithiosulfate dihydrate
  • Method for determining content of sodium chloride in hexamethylene 1, 6-disodium dithiosulfate dihydrate

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specific Embodiment approach 1

[0037] Specific embodiment one: this embodiment is the determination method of sodium chloride content in the hexamethylene 1,6-dithiosulfate disodium salt dihydrate, specifically completes according to the following steps:

[0038] 1. Solution preparation: ①. Prepare NaCl standard solution: Dissolve sodium chloride in distilled water, and use a volumetric flask to constant volume to obtain a NaCl standard solution with a concentration of 0.05mol / L; ②. Prepare AgNO 3 Solution: AgNO 3 Dissolve in distilled water, and use a brown volumetric flask to make constant volume to obtain AgNO with a concentration of 0.1mol / L 3 solution; ③, preparation of NH 4 SCN solution: NH 4 Dissolve SCN in distilled water and use a volumetric flask to constant volume to obtain NH 4 SCN solution; ④, preparation of ferric ammonium sulfate indicator: first add nitric acid to distilled water, then add NH 4 Fe(SO 4 ) 2 12H 2 O, stirred to NH 4 Fe(SO 4 ) 2 12H 2 O completely dissolves, namely o...

specific Embodiment approach 2

[0079] Specific embodiment two: the difference between this embodiment and specific embodiment one is: step one 4. prepare ferric ammonium sulfate indicator: first add nitric acid to distilled water, then add NH 4 Fe(SO 4 ) 2 12H 2 O, stirred to NH 4 Fe(SO 4 ) 2 12H 2 O completely dissolves, namely obtains the ferric ammonium sulfate indicator that mass fraction is 10%, the volume ratio of described distilled water and sulfuric acid is 10:1, and the mass fraction of described nitric acid is 65%. Others are the same as the first embodiment.

[0080] Adopt following test verification effect of the present invention

[0081] Test 1: The determination method of sodium chloride content in hexamethylene 1,6-dithiosulfate disodium salt dihydrate, specifically, it is completed according to the following steps:

[0082] 1. Solution preparation: ①. Prepare NaCl standard solution: Dissolve sodium chloride in distilled water, and use a volumetric flask to constant volume to obtain...

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Abstract

The invention discloses a method for determining the content of sodium chloride in hexamethylene 1, 6-disodium dithiosulfate dihydrate, relates to a method for determining the content of sodium chloride in HTS, and aims to solve the problem of high errors of the existing method for determining the content of sodium chloride in HTS. The method comprises the following steps of firstly, preparing a solution, namely, preparing NaCl standard solution, preparing AgNO3 solution, preparing NH4SCN solution, and preparing an ammonium ferric sulfate indicator; secondly, calibrating the NH4SCN solution; and thirdly, titrating an HTS specimen. The method is mainly used for determining the content of sodium chloride in hexamethylene 1, 6-disodium dithiosulfate dehydrate.

Description

technical field [0001] The invention relates to a method for determining sodium chloride content in HTS Background technique [0002] Hexamethylene 1,6-dithiosulfate disodium salt dihydrate, chemical formula C 6 h 16 o 8 S 4 Na 2 , the molecular structure is Hexamethylene 1,6-dithiosulfate disodium salt dihydrate is used as an excellent post-vulcanization stabilizer in the rubber industry. Adding a small amount can make the rubber form a cross-linked structure and effectively improve the service life of the rubber. It is generally sold as Duralink HTS in domestic and foreign markets, and it is usually abbreviated as HTS internationally. [0003] The industrially synthesized reaction equation of HTS is: [0004] 2Na 2 S 2 o 3 +Cl-(CH 2 ) 6 -Cl→NaO 3 SS-(CH 2 ) 6 -SSO 3 Na+2NaCl [0005] It can be seen from the reaction equation that there will be a certain amount of sodium chloride impurity in HTS. If the sodium chloride mixed in HTS is excessive, it will s...

Claims

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Application Information

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IPC IPC(8): G01N31/16
Inventor 杨春晖宋梁成李季张磊
Owner HARBIN INST OF TECH
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