GB812680A - Improvements in or relating to separation of hydrocarbons with molecular sieves - Google Patents
Improvements in or relating to separation of hydrocarbons with molecular sievesInfo
- Publication number
- GB812680A GB812680A GB34327/57A GB3432757A GB812680A GB 812680 A GB812680 A GB 812680A GB 34327/57 A GB34327/57 A GB 34327/57A GB 3432757 A GB3432757 A GB 3432757A GB 812680 A GB812680 A GB 812680A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sodium
- zone
- hydrocarbons
- aromatics
- hydrocarbon
- 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
- C07C7/00—Purification; Separation; Use of additives
- C07C7/12—Purification; Separation; Use of additives by adsorption, i.e. purification or separation of hydrocarbons with the aid of solids, e.g. with ion-exchangers
- C07C7/13—Purification; Separation; Use of additives by adsorption, i.e. purification or separation of hydrocarbons with the aid of solids, e.g. with ion-exchangers by molecular-sieve technique
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/12—Purification; Separation; Use of additives by adsorption, i.e. purification or separation of hydrocarbons with the aid of solids, e.g. with ion-exchangers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A molecular sieve adsorbent known as a molecular template comprises a resin or gel, such as polystyrene or silica gel, formed in the presence of the material it is subsequently desired to adsorb, e.g. esters or hydrocarbons, and for which it subsequently shows selectivity. The adsorbent may be used in a fixed or fluidized bed. A sodium aluminosilicate for use as a molecular sieve adsorbent is prepared by reaction of a sodium silicate having a high ratio of sodium to silica, e.g. sodium metasilicate, is reacted with a sodium aluminate having a sodium to alumina ratio of 1 : 1 to 3 : 1, the amounts being such that the ratio of silica to alumina is at least 3 : 1 and preferably between 4 : 1 and 10 : 1. The sodium aluminate is added to the sodium metasilicate solution at ambient temperature with stirring and the paste obtained heated at 180-215 DEG F. for a time which may be as long as 200 hours or more to ensure the crystals have the desired pore size, e.g. about 13 . The sodium aluminosilicate is then filtered, washed, dried and activated in a calcining zone at 700-900 DEG F.ALSO:Aromatic hydrocarbons or mixtures of aromatic and olefinic hydrocarbons are separated from hydrocarbon mixtures containing them using molecular sieves by passing the hydrocarbon feed through two separate zones containing molecular sieves for a time at least sufficient to desorb from the first zone all hydrocarbons, other than olefines and aromatics, initially adsorbed in said first zone, discontinuing the flow of hydrocarbons, desorbing the adsorbed hydrocarbons from said first zone then repeating the operation with a reversed direction of flow of hydrocarbon feed. The sieves used preferably have pore sizes of 8-15 and particularly useful are those having a pore size of about 13 . They may be of the alumino-silicate type such as a natural or synthetic zeolite, or the molecular template type, i.e. a resin or gel, such as a polystyrene or silica gel formed in the presence of the hydrocarbon it is subsequently desired to adsorb. The preparation of a particular sodium aluminosilicate is described (see Group III). The adsorption is preferably performed in the vapour phase. Useful conditions are 100-500 DEG F. and feed rates of 0.1-10 volumes of liquid feed per volume of sieve per hour. Desorption may be accomplished (1) by purging with an unreactive gas or vapour at 450-750 DEG F.; (2) by evacuation at temperatures about the same as or above that used for adsorption; (3) by displacement with an aromatic hydrocarbon of different boiling point from the adsorbed material and from which it can be subsequently separated by distillation; (4) steaming followed by dehydration at relatively low temperatures. When separating aromatics alone the feed flow is continued until all non-aromatics are desorbed from the first zone (with reference to hydrocarbon flow) whereupon the aromatics are desorbed from this zone; when separating aromatics and olefines the flow is continued until olefines appear in the effluent from the second zone and aromatics and olefines then desorbed from the first.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US812680XA | 1956-12-07 | 1956-12-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB812680A true GB812680A (en) | 1959-04-29 |
Family
ID=22163114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34327/57A Expired GB812680A (en) | 1956-12-07 | 1957-11-04 | Improvements in or relating to separation of hydrocarbons with molecular sieves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB812680A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3098814A (en) * | 1959-09-08 | 1963-07-23 | Exxon Research Engineering Co | Two-stage adsorption process |
US20130206606A1 (en) * | 2011-05-19 | 2013-08-15 | Calera Corporation | Electrochemical hydroxide systems and methods using metal oxidation |
US9187834B2 (en) | 2011-05-19 | 2015-11-17 | Calera Corporation | Electrochemical hydroxide systems and methods using metal oxidation |
US9828313B2 (en) | 2013-07-31 | 2017-11-28 | Calera Corporation | Systems and methods for separation and purification of products |
US9957621B2 (en) | 2014-09-15 | 2018-05-01 | Calera Corporation | Electrochemical systems and methods using metal halide to form products |
US10266954B2 (en) | 2015-10-28 | 2019-04-23 | Calera Corporation | Electrochemical, halogenation, and oxyhalogenation systems and methods |
US10556848B2 (en) | 2017-09-19 | 2020-02-11 | Calera Corporation | Systems and methods using lanthanide halide |
US10590054B2 (en) | 2018-05-30 | 2020-03-17 | Calera Corporation | Methods and systems to form propylene chlorohydrin from dichloropropane using Lewis acid |
US10619254B2 (en) | 2016-10-28 | 2020-04-14 | Calera Corporation | Electrochemical, chlorination, and oxychlorination systems and methods to form propylene oxide or ethylene oxide |
-
1957
- 1957-11-04 GB GB34327/57A patent/GB812680A/en not_active Expired
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3098814A (en) * | 1959-09-08 | 1963-07-23 | Exxon Research Engineering Co | Two-stage adsorption process |
US9957623B2 (en) | 2011-05-19 | 2018-05-01 | Calera Corporation | Systems and methods for preparation and separation of products |
US9187835B2 (en) | 2011-05-19 | 2015-11-17 | Calera Corporation | Electrochemical systems and methods using metal and ligand |
US9200375B2 (en) * | 2011-05-19 | 2015-12-01 | Calera Corporation | Systems and methods for preparation and separation of products |
US20130206606A1 (en) * | 2011-05-19 | 2013-08-15 | Calera Corporation | Electrochemical hydroxide systems and methods using metal oxidation |
US9187834B2 (en) | 2011-05-19 | 2015-11-17 | Calera Corporation | Electrochemical hydroxide systems and methods using metal oxidation |
US10287223B2 (en) | 2013-07-31 | 2019-05-14 | Calera Corporation | Systems and methods for separation and purification of products |
US9828313B2 (en) | 2013-07-31 | 2017-11-28 | Calera Corporation | Systems and methods for separation and purification of products |
US9957621B2 (en) | 2014-09-15 | 2018-05-01 | Calera Corporation | Electrochemical systems and methods using metal halide to form products |
US10266954B2 (en) | 2015-10-28 | 2019-04-23 | Calera Corporation | Electrochemical, halogenation, and oxyhalogenation systems and methods |
US10844496B2 (en) | 2015-10-28 | 2020-11-24 | Calera Corporation | Electrochemical, halogenation, and oxyhalogenation systems and methods |
US10619254B2 (en) | 2016-10-28 | 2020-04-14 | Calera Corporation | Electrochemical, chlorination, and oxychlorination systems and methods to form propylene oxide or ethylene oxide |
US10556848B2 (en) | 2017-09-19 | 2020-02-11 | Calera Corporation | Systems and methods using lanthanide halide |
US10590054B2 (en) | 2018-05-30 | 2020-03-17 | Calera Corporation | Methods and systems to form propylene chlorohydrin from dichloropropane using Lewis acid |
US10807927B2 (en) | 2018-05-30 | 2020-10-20 | Calera Corporation | Methods and systems to form propylene chlorohydrin from dichloropropane using lewis acid |
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