GB1401616A - Manufacture of phosphorus acids - Google Patents
Manufacture of phosphorus acidsInfo
- Publication number
- GB1401616A GB1401616A GB3388971A GB3388971A GB1401616A GB 1401616 A GB1401616 A GB 1401616A GB 3388971 A GB3388971 A GB 3388971A GB 3388971 A GB3388971 A GB 3388971A GB 1401616 A GB1401616 A GB 1401616A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- pcl
- ortho
- reaction mixture
- hcl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
Abstract
1401616 Phosphorous acids ALBRIGHT & WILSON Ltd 4 July 1972 [20 July 1971] 33889/71 Heading C1A Ortho and pyrophosphorous acids are prepared by adding cone. HCl to a soln. of PCl 3 in an inert water-immiscible organic solvent. The solvent may be petroleum ether, benzene, toluene, monochlorobenzene or CCl 4 . The HCl gas evolved may be absorbed in a countercurrent of water to form cone. HCl, cooled and then recycled to the reaction mixture. Solid ortho acid may be obtained by using a stoichiometric ratio of PCl 3 /H 2 O in the reaction mixture, an anhydrous ortho/pyro acid mixture by using an excess of PCl 3 , and an aq. ortho acid soln. by using an excess of H 2 O. The PCl 3 concn. is preferably 5-15% by wt. and the reaction temp. is preferably 20-40‹ C. Solid acid may be removed from the reaction mixture by melting the acid.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3388971A GB1401616A (en) | 1971-07-20 | 1971-07-20 | Manufacture of phosphorus acids |
NL7209962A NL7209962A (en) | 1971-07-20 | 1972-07-19 | |
IT6933472A IT964718B (en) | 1971-07-20 | 1972-07-19 | PROCEDURE FOR THE PRODUCTION OF PHOSPHOROUS ACIDS |
FR7226087A FR2146402B1 (en) | 1971-07-20 | 1972-07-19 | |
DE19722235425 DE2235425A1 (en) | 1971-07-20 | 1972-07-19 | PROCESS FOR THE PRODUCTION OF PHOSPHORUS ACIDS |
CH1082272A CH573869A5 (en) | 1971-07-20 | 1972-07-19 | |
AU44743/72A AU464489B2 (en) | 1971-07-20 | 1972-07-20 | Improvements inthe manufacture of orthophosphorous acids pyrophosphorous acid and mixtures thereof |
CA147,554A CA973681A (en) | 1971-07-20 | 1972-07-20 | Manufacture of phosphorous acids |
BE786524A BE786524A (en) | 1971-07-20 | 1972-07-20 | IMPROVEMENTS IN THE MANUFACTURING OF PHOSPHORUS ACIDS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3388971A GB1401616A (en) | 1971-07-20 | 1971-07-20 | Manufacture of phosphorus acids |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1401616A true GB1401616A (en) | 1975-07-16 |
Family
ID=10358766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3388971A Expired GB1401616A (en) | 1971-07-20 | 1971-07-20 | Manufacture of phosphorus acids |
Country Status (9)
Country | Link |
---|---|
AU (1) | AU464489B2 (en) |
BE (1) | BE786524A (en) |
CA (1) | CA973681A (en) |
CH (1) | CH573869A5 (en) |
DE (1) | DE2235425A1 (en) |
FR (1) | FR2146402B1 (en) |
GB (1) | GB1401616A (en) |
IT (1) | IT964718B (en) |
NL (1) | NL7209962A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103864038A (en) * | 2012-12-15 | 2014-06-18 | 临沭县华盛化工有限公司 | Removal method for hydrochloric acid in production of phosphorous acid |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3725583A1 (en) * | 1987-08-01 | 1989-02-09 | Budenheim Rud A Oetker Chemie | Phosphorous acid solns. of low iron and arsenic content - prepd. by converting sec. calcium phosphite to prim. calcium phosphite solns., removing iron and arsenic by pptn. etc |
GB9008406D0 (en) * | 1990-04-12 | 1990-06-13 | Albright & Wilson | Process for producing phosphorous acid |
-
1971
- 1971-07-20 GB GB3388971A patent/GB1401616A/en not_active Expired
-
1972
- 1972-07-19 DE DE19722235425 patent/DE2235425A1/en active Pending
- 1972-07-19 NL NL7209962A patent/NL7209962A/xx unknown
- 1972-07-19 CH CH1082272A patent/CH573869A5/xx not_active IP Right Cessation
- 1972-07-19 FR FR7226087A patent/FR2146402B1/fr not_active Expired
- 1972-07-19 IT IT6933472A patent/IT964718B/en active
- 1972-07-20 AU AU44743/72A patent/AU464489B2/en not_active Expired
- 1972-07-20 BE BE786524A patent/BE786524A/en unknown
- 1972-07-20 CA CA147,554A patent/CA973681A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103864038A (en) * | 2012-12-15 | 2014-06-18 | 临沭县华盛化工有限公司 | Removal method for hydrochloric acid in production of phosphorous acid |
CN103864038B (en) * | 2012-12-15 | 2016-01-20 | 临沭县华盛化工有限公司 | Phosphorous acid removes the method for hydrochloric acid in producing |
Also Published As
Publication number | Publication date |
---|---|
CA973681A (en) | 1975-09-02 |
NL7209962A (en) | 1973-01-23 |
CH573869A5 (en) | 1976-03-31 |
AU464489B2 (en) | 1975-08-28 |
DE2235425A1 (en) | 1973-02-15 |
AU4474372A (en) | 1974-01-24 |
FR2146402B1 (en) | 1974-07-26 |
FR2146402A1 (en) | 1973-03-02 |
IT964718B (en) | 1974-01-31 |
BE786524A (en) | 1972-11-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |