A Study on NH<sub>4</sub>Cl-HCHO System Ⅰ. The pH Value Variation of NH<sub>4</sub>Cl-HCHO System with Temperature, Concentration, Urea and Methylolurea Compounds

Wu Shuhong Sun; Zhenyian

doi:10.19455/j.mcgy.1989.03.002

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A Study on NH₄Cl-HCHO System Ⅰ. The pH Value Variation of NH₄Cl-HCHO System with Temperature, Concentration, Urea and Methylolurea Compounds
1. Institule of Wood Industry, Chinese Academy of Forestry
Issue 3, Pages: 5-8(1989)
DOI： 10.19455/j.mcgy.1989.03.002

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[1]吴书泓,孙振鸢.氯化铵—甲醛体系的研究——Ⅰ.氯化铵—甲醛体系PH值的研究[J].木材工业,1989(03):5-8.

Wu Shuhong Sun, Zhenyian. A Study on NH₄Cl-HCHO System Ⅰ. The pH Value Variation of NH₄Cl-HCHO System with Temperature, Concentration, Urea and Methylolurea Compounds. [J]. China Wood Industry (3):5-8(1989)
[1]吴书泓,孙振鸢.氯化铵—甲醛体系的研究——Ⅰ.氯化铵—甲醛体系PH值的研究[J].木材工业,1989(03):5-8. DOI： 10.19455/j.mcgy.1989.03.002.

Wu Shuhong Sun, Zhenyian. A Study on NH₄Cl-HCHO System Ⅰ. The pH Value Variation of NH₄Cl-HCHO System with Temperature, Concentration, Urea and Methylolurea Compounds. [J]. China Wood Industry (3):5-8(1989) DOI： 10.19455/j.mcgy.1989.03.002.

摘要

本文阐述了温度、浓度和尿素及其羟甲基衍生物对氯化胺-甲醛体系pH值的影响。试验中发现:1)体系的pH值随温度的上升而增加,随甲醛浓度的增加而下降;2)加入尿素和羟甲基脲化合物使体系的pH值下降。而且,尿素能使pH值下降约1个pH单位。

Abstract

This study focuses on the effects of temperature, concentration, urea and methylolurea compounds on the pH values of NH,4,Cl-HCHO system. Through experiment, the results are obtained as follow: 1) the pH values of the system increase with rise of temperature and decrease with increase of formalde-hyde concentration; 2) addition of urea methylolurea compounds makes the pH value decrease by approximately 1 pH unit.

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A Study on NH4Cl-HCHO System Ⅰ. The pH Value Variation of NH4Cl-HCHO System with Temperature, Concentration, Urea and Methylolurea Compounds

DOI： 10.19455/j.mcgy.1989.03.002

摘要

Abstract

关键词

Keywords

references

A Study on NH₄Cl-HCHO System Ⅰ. The pH Value Variation of NH₄Cl-HCHO System with Temperature, Concentration, Urea and Methylolurea Compounds