GB671457A - Extractive crystallisation process - Google Patents
Extractive crystallisation processInfo
- Publication number
- GB671457A GB671457A GB4817/48A GB481748A GB671457A GB 671457 A GB671457 A GB 671457A GB 4817/48 A GB4817/48 A GB 4817/48A GB 481748 A GB481748 A GB 481748A GB 671457 A GB671457 A GB 671457A
- Authority
- GB
- United Kingdom
- Prior art keywords
- complexes
- aqueous
- alcohol
- urea
- those described
- 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/82—Purification; Separation; Stabilisation; Use of additives
- C07C209/86—Separation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Urea complexes of straight-chain organic compounds are formed by treating a mixture of organic compounds with urea in the presence of water or of an aqueous alcohol, the water-to-alcohol ratio being from 3 : 1-20 : 1 by volume and separating an aqueous slurry of the crystalline complexes from the raffinate by decantation and centrifuging. The alcohol used, organic compounds treated, reaction conditions and applications of the process are as those described in Specification 671,456. The complexes are preferably decomposed, to regenerate the straight-chain compounds, while still in the form of an aqueous slurry, by methods such as those described in Specification 671,456.ALSO:Oils are refined by treating with urea to form crystalline complexes with the straight-chain components of the oil in the presence of water or of an aqueous alcohol, the water-to-alcohol ratio being from 3 : 1-20 : 1 by volume, and separating an aqueous slurry of the crystalline complexes from the raffinate by decantation or centrifuging. The alcohol used, reaction conditions and applications of the process are those described in Specification 671,456. The complexes are preferably decomposed while still in the form of an aqueous slurry, by methods such as those described in Specification 671,456. In an example, a petroleum pressure distillate of low cetane number boiling from 350 DEG F. to 525 DEG F. was stirred at room temperature with a saturated aqueous solution of urea. The reaction mixture separated into two phases and the lower aqueous phase, containing a suspension of the crystalline complex, was drawn off and heated to 150 DEG F.; the complex decomposed and the aqueous layer formed was separated leaving the diesel fuel of high cetane number.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US671457XA | 1947-02-21 | 1947-02-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB671457A true GB671457A (en) | 1952-05-07 |
Family
ID=22073996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4817/48A Expired GB671457A (en) | 1947-02-21 | 1948-02-18 | Extractive crystallisation process |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE866786C (en) |
| FR (1) | FR961884A (en) |
| GB (1) | GB671457A (en) |
| NL (1) | NL73844C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2886542A (en) * | 1954-10-06 | 1959-05-12 | Atlantic Refining Co | Resins |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1049032B (en) * | 1955-04-29 | 1959-01-22 | Oelwerke Julius Schindler G M | Process for the continuous dewaxing of hydrocarbon oils using urea adducts |
| DE1038684B (en) * | 1955-06-01 | 1958-09-11 | Nac Iacalvo Soteloia De Combus | Process for dewaxing lubricating oils |
| DE1000951B (en) * | 1955-06-02 | 1957-01-17 | Edeleanu Gmbh | Process for the separation of paraffins from hydrocarbon oils |
| DE1107362B (en) * | 1956-07-21 | 1961-05-25 | Scholven Chemie Ag | Process for the production of a non-baking, fine-grained adduct from hydrocarbons and urea |
| DE1055731B (en) * | 1956-08-16 | 1959-04-23 | British Petroleum Co | Process for the separation of straight-chain hydrocarbons |
| DE2637401C3 (en) * | 1976-08-19 | 1988-09-08 | Moskovskij institut neftechimičeskoj i gazovoj promyšlennosti imeni I.M. Gubkina, Moskau/Moskva | Process for the separation of individual n-alkanes from crude oil |
-
1948
- 1948-02-18 GB GB4817/48A patent/GB671457A/en not_active Expired
- 1948-02-18 NL NL138923A patent/NL73844C/xx active
- 1948-02-21 FR FR961884D patent/FR961884A/fr not_active Expired
- 1948-10-02 DE DEP14706D patent/DE866786C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2886542A (en) * | 1954-10-06 | 1959-05-12 | Atlantic Refining Co | Resins |
Also Published As
| Publication number | Publication date |
|---|---|
| DE866786C (en) | 1953-02-12 |
| NL73844C (en) | 1954-01-15 |
| FR961884A (en) | 1950-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB650571A (en) | Hydrocarbon complexes | |
| US1968601A (en) | Preparation of olefine derivatives | |
| GB727564A (en) | Improvements in or relating to process for separating organic compounds | |
| US2734019A (en) | Hydrofining naphthenic lubricating oil | |
| GB671457A (en) | Extractive crystallisation process | |
| GB915601A (en) | Demetallization of petroleum oils | |
| GB671456A (en) | Extractive crystallisation process | |
| GB534856A (en) | An improved catalytic cracking process | |
| GB400844A (en) | Improvements in the treatment of carbonaceous materials with hydrogenating gases | |
| US1827165A (en) | Separation of oil from bleaching clay | |
| GB778700A (en) | Improvements in or relating to the separation of hydrocarbons | |
| US2668138A (en) | Foam depressant | |
| US2405905A (en) | Removal of sulphur compounds from hydrocarbon polymers | |
| US2032527A (en) | Compound for treating petroleums | |
| US2322308A (en) | Treatment of organic compounds | |
| US1365048A (en) | And mortimer j | |
| GB671113A (en) | Improvements in or relating to the refining of waxes | |
| US2397191A (en) | Spreading agent | |
| GB1094523A (en) | Process for the purification of dimethyl sulphoxide | |
| US2093348A (en) | Process for the refining of mineral, vegetable, or animal oils, paraffins, waxes, resins, and the like | |
| GB1243959A (en) | Method of extracting diolefins | |
| GB1504125A (en) | Process for purifying phosphatides | |
| US2666048A (en) | Separation of low molecular weight | |
| GB669981A (en) | Bleaching process for mineral oils and paraffins | |
| GB816540A (en) | Process for the preparation of alumina-containing formed pieces which are suitable as adsorbents |