scholarly journals Researches on manufacture of pulp by nitric acid method

1946 ◽  
Vol 2 (2) ◽  
pp. 73-76
Author(s):  
Isao Shimoda ◽  
Masako Kotani
Keyword(s):  
Nitric Acid ◽  
Acid Method

Comparison of the Bromine and Nitric Acid Methods of Estimating Sulfur in Acetone Extracts

1947 ◽  
Vol 20 (1) ◽  
pp. 315-319 ◽  
Author(s):  
J. F. Morley ◽  
J. R. Scott
Keyword(s):  
Nitric Acid ◽  
Sulfur Content ◽  
Elementary Sulfur ◽  
Total Sulfur ◽  
Total Sulfur Content ◽  
Acid Method ◽  
The Difference ◽  
The One ◽  
Acetone Extracts ◽  
Free Sulfur

Abstract From the experiments described, it appears that neither the bromine method nor the nitric acid method is perfectly satisfactory, for the following reasons. (1) Neither method gives the true free sulfur in rubbers containing sulfur-bearing accelerators, as these cause positive errors of anything up to 0.2–0.3 per cent. (2) The nitric acid method does not give the true free sulfur in rubbers, without sulfur-bearing accelerators, because the result includes some of the sulfur combined with the rubber “resins” the tests do not show definitely whether this applies also to the bromine method. (3) Neither method gives the total sulfur in the acetone extract, since some of the sulfur combined with the “resins” is not included in the result; the presence of certain sulfur-bearing accelerators increases the error. The statement previously referred to (loc. cit.), that the bromine method approximates more nearly to the elementary sulfur content and the nitric acid method more nearly to the total sulfur content of the extract, appears to be a correct generalization. In most cases, however, the difference between the results obtained by the two methods would be less than 0.1 per cent. In respect of simplicity and rapidity of working, the bromine method has the advantage over the nitric acid method, and therefore in all ordinary circumstances is the one to be recommended.

The Nitric Acid Method for Protein Estimation in Biological Samples

2009 ◽  
pp. 35-45
Author(s):  
Scott A. Boerner ◽  
Crescent R. Isham ◽  
Yean Kit Lee ◽  
Jennifer D. Tibodeau ◽  
Scott H. Kaufmann ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Biological Samples ◽  
Protein Estimation ◽  
Acid Method

A non-nitric acid method of adipic acid synthesis: organic solvent- and promoter-free oxidation of cyclohexanone with oxygen over hollow-structured Mn/TS-1 catalysts

2015 ◽  
Vol 17 (3) ◽  
pp. 1884-1892 ◽  
Author(s):  
Guoqiang Zou ◽  
Wenzhou Zhong ◽  
Liqiu Mao ◽  
Qiong Xu ◽  
Jiafu Xiao ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Organic Solvent ◽  
Adipic Acid ◽  
Acid Production ◽  
Acid Synthesis ◽  
Oxidative Cleavage ◽  
Acid Method ◽  
Free Oxidation

A novel hollow-structured Mn/TS-1 catalyst has been reported as a non-nitric acid route for adipic acid production from oxidative cleavage of cyclohexanone.

Determination of Free Carbon in Rubber. The Cresol Method

1941 ◽  
Vol 14 (1) ◽  
pp. 241-248 ◽  
Author(s):  
J. B. Roberts
Keyword(s):  
United States ◽  
Nitric Acid ◽  
Carbon Content ◽  
Accurate Method ◽  
The United States ◽  
Free Carbon ◽  
Simple Apparatus ◽  
Vulcanized Rubber ◽  
Acid Method

Abstract A simple, accurate method for the determination of free carbon in either raw or vulcanized rubber is presented. It has replaced the nitric acid method entirely in the laboratory of the United States Rubber Company, Detroit, Michigan. A study of the effects of interfering substances, and numerous comparisons of results by the cresol and the nitric acid methods, are given. Results by the cresol method, in the absence of interfering substances, are within 1 per cent of the calculated free carbon content. The method requires only simple apparatus readily available.

scholarly journals Extraction and Determination of Various Precipitates in Steel by Cold Nitric Acid Method

1972 ◽  
Vol 58 (14) ◽  
pp. 2067-2077 ◽  
Author(s):  
Kazuo KAWAMURA ◽  
Shiro WATANABE ◽  
Tokio SUZUKI
Keyword(s):  
Nitric Acid ◽  
Acid Method

scholarly journals Researches on manufacture of pulp by nitric acid method (34)

1949 ◽  
Vol 5 (2) ◽  
pp. 79-82
Author(s):  
Isao Shimoda
Keyword(s):  
Nitric Acid ◽  
Acid Method
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