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Automatic test method and instrument for modules of sodium silicate

A technology for measuring the modulus of water glass and measuring instruments, which is applied in the direction of chemical reaction of materials and material analysis by observing the influence of chemical indicators. Sodium back drop and other problems, to achieve the effect of easy operation, shorten the measurement cycle, and improve the accuracy of judgment

Inactive Publication Date: 2012-09-05
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The task of the present invention is to provide a water glass modulus test method, which solves the problem that the existing measurement method is complicated in operation, mainly relies on manual operation, difficult to judge the titration end point, low measurement accuracy, possible repeated titration, long test cycle, and difficult measurement process. Problems requiring back dripping of sodium hydroxide

Method used

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  • Automatic test method and instrument for modules of sodium silicate
  • Automatic test method and instrument for modules of sodium silicate
  • Automatic test method and instrument for modules of sodium silicate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1 The inventive method is measured to known low modulus water glass modulus

[0057] (1) Sample solution preparation: According to the national standard "Industrial Sodium Silicate GB / T 4209-2008", weigh 5g of solid water glass with a known modulus of 1.03, transfer it into a 250mL volumetric flask, add distilled water to the 250mL scale of the volumetric flask , Shake well, this solution is the test solution C, use a pipette to pipette 50mL test solution C and place it in a 150mL beaker.

[0058](2) Titration of sodium oxide: titrate test solution C in the 150mL beaker with the processor to control the precise liquid addition titration device with 0.5mol / L hydrochloric acid standard solution, and record the volume of the used 0.5mol / L hydrochloric acid standard solution for titration with the processor, at the same time Use the pH electrode connected to the processor to monitor the pH value change of the test solution C in real time. When the potential signa...

Embodiment 2

[0063] Embodiment 2 The inventive method is measured to known middle modulus water glass modulus

[0064] Take by weighing 5g known modulus and be the solid water glass of 2.03, concrete steps are with embodiment 1.

[0065] The three titrations of this embodiment are respectively V 1 =8.65mL, V 2 =36.05mL, V 3 =0.75mL, then the modulus of the water glass is m=2.039, consistent with the known water glass modulus m=2.03.

Embodiment 3

[0066] Embodiment 3 The inventive method measures the modulus of high modulus water glass

[0067] Take by weighing 5g known modulus and be the solid water glass of 2.85, concrete steps are with embodiment 1.

[0068] The three titrations of this embodiment are respectively V 1 =5.50mL, V 2 =32.24mL, V 3 =0.87mL, then the modulus of the water glass is m=2.852, consistent with the known water glass modulus m=2.85.

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Abstract

The invention provides an automatic test method and instrument for modules of sodium silicate, so as to solve the problems that in the existing measuring method, naked eyes are adopted to judge the titration end point, the measuring precision is low, and the manual operation is adopted, back titration is required to be carried out on sodium hydroxide solution in the measuring process, and the test cycle is longer. In the invention, an electric potential signal collected by a pH electrode is adopted to replace the naked eyes to judge the titration end point, manual liquid-adding titration is replaced by accurate liquid-adding titration carried out by an accurate liquid-adding titration apparatus, a processor is adopted to control the titration process and processing data, and a magnetic force heating stirrer is adopted to heat and stir in the whole measuring process. The instrument in the invention consists of a liquid-adding titration unit, a reaction unit, a signal acquisition amplifying unit, a data processing unit and a result output unit. By utilizing the method and instrument provided by the invention, rapid and accurate measurement of modules of the sodium silicate is realized, and the labor intensity of experimenters is alleviated.

Description

technical field [0001] The invention relates to a water glass modulus measuring technology, in particular to a method and an instrument capable of automatically measuring the water glass modulus. Background technique [0002] Water glass, also known as sodium silicate, chemical name is sodium silicate, molecular formula is Na 2 O nSiO 2 ·xH 2 O. Water glass is cheap, abundant in sources, colorless, odorless, and non-toxic. It is used in the chemical industry to manufacture silica gel, white carbon black, zeolite molecular sieve, sodium metasilicate, silica sol, layer silicon, and instant powdered sodium silicate. , Potassium sodium silicate and other silicate products are the basic raw materials of silicon compounds. In the light industry, it is an indispensable raw material for detergents such as washing powder and soap, and it is also a water softener and sedimentation aid; it is used in dyeing, bleaching and sizing in the textile industry; it is widely used in casting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/80G01N21/79
Inventor 樊自田刘蒙汪华方龙威胡雪婷
Owner HUAZHONG UNIV OF SCI & TECH