Chemistry of inorganic compounds – Phosphorus or compound thereof – Halogen containing
Patent
1992-09-28
1994-05-10
Langel, Wayne
Chemistry of inorganic compounds
Phosphorus or compound thereof
Halogen containing
423DIG5, C01B 2510
Patent
active
053105290
ABSTRACT:
There is disclosed an improved process for the preparation of phosphorus trichloride wherein elemental phosphorus is caused to react with chlorine. The improvement comprises continuous, high speed analysis of the contents of the reactor whereby the reaction is controlled to produce less phosphorus pentachloride and other by-products. The analysis is performed by a laser Raman spectrometer associated with an optrode having a remotely located probe head and a circulating sampling system to continuously provide fresh sample to the probe head continuously. Also disclosed is apparatus for the automatic control of the reaction by control of the reactant feed to the reactor in response to the on-line, continuous analysis of the reactor contents.
REFERENCES:
patent: 4263010 (1981-04-01), Randolph
patent: 4319894 (1982-03-01), Kempner et al.
patent: 4802761 (1989-02-01), Bowen et al.
patent: 4816226 (1989-03-01), Jordan et al.
patent: 4892383 (1990-01-01), Klainer et al.
patent: 4929561 (1990-05-01), Hirschfeld
patent: 5102625 (1992-04-01), Milo
patent: 5114864 (1992-05-01), Walt
Schumann, Rudolph; Rapid Method for Determining Elemental Phosphorus Trichloride; Chem. Tech. (Leipzig) vol. 24, No. 6, p. 363 (1972).
Kirievskaya et al; Gas-Chromatographic Determination of White Phosphorus and of Certain Phosphorus Chloride; Zhurnal Prickladnoi Khimmi, vol. 45, No. 9, pp. 2074-2076 (1972).
Gantner et al; Applications of Lasa Raman Spectrometry in Process Central Using Optical Fibers; Fresenius J. Anal Chem. vol. 338 pp. 2-8 (1990).
Keeler, R. A. et al; Analysis of Mixtures of White Phosphorus, Phosphorus Oxychloride and Phosphorus Trichloride; Anal Chem. vol. 26, No. 5, pp. 933-934 (1954).
Feld Macaulay S.
Fisher David O.
Freeman John J.
Gervasio Gregory J.
Hochwalt Mark A.
Langel Wayne
Loyer R.
Monsanto Company
LandOfFree
Process for preparing phosphorus trichloride does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for preparing phosphorus trichloride, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing phosphorus trichloride will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2411502