The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2000
Filed:
Jun. 09, 1997
Kinya Tawara, Saitama, JP;
Other;
Abstract
In a sulfur determining process, comprising a hydrocracking step of a sample in a ceramic reactor and darkness measuring step of lead acetate soaked tape by reaction of produced H.sub.2 S, an improvement is made. The improvement comprises at least one of procedure selected from the group consisting of introduction of CO.sub.2 in the ceramic reactor, using an inverted AC current from stabilized DC current as an electric supply for the darkness measuring step, covering a box containing the darkness measuring sensor and a sensor circuit with a heat insulating material, A/D converting a differential output and making moving averages for making a noiseless record, and charging the differential output to a condenser through an electric resistance for making a noiseless record. Sulfur content is measured from a record of improved output. According to the improvements, an economic conventional ceramic reactor becomes available, and limit of sulfur determination of 25 ppb is improved to 2 ppb in the best case.