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:
Feb. 11, 1986
Filed:
Feb. 02, 1982
Robert T Moore, Mountain View, CA (US);
Yoshihiro Takahashi, San Jose, CA (US);
Xertex Corporation, Santa Clara, CA (US);
Abstract
A sulfur dioxide-containing analysis stream, such as formed by the oxidative pyrolysis of a sulfur-containing liquid, is passed through a trapping medium comprising metal or metal oxide, preferably nickel oxide, wherein the sulfur dioxide is retained while the remainder of the gas flows through. Thereafter, the flow of analysis gas is discontinued and the trap zone is heated to release the sulfur dioxide, which is passed in an inert carrier gas stream through a sulfur dioxide detector such as a conductivity cell. Halides in the analysis stream are removed prior to trapping by being dissolved in an aqueous liquid in a scrubbing chamber. Such chamber is regenerated by vaporizing the halide-containing aqueous solution and venting it. Also, a system of the foregoing type including two traps and a single detector whereby two samples are alternately analyzed and trapped to reduce the overall analysis time.