Method of purifying Fischer-Tropsch derived water
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-061/00
B01D-015/00
B01D-015/04
B01D-003/00
출원번호
US-0015308
(2004-12-16)
우선권정보
ZA-2002/4846(2002-06-18)
발명자
/ 주소
Kohler,Luis Pablo Fidel Dancuart
Du Plessis,Gert Hendrik
Du Toit,Francois Jacobus
Koper,Edward Ludovicus
Phillips,Trevor David
Van Der Walt,Janette
출원인 / 주소
Sasol Technology (Pty) Ltd.
대리인 / 주소
Knobbe Martens Olson &
인용정보
피인용 횟수 :
8인용 특허 :
14
초록▼
A process for the production of highly purified water 38 from Fischer-Tropsch reaction water 12, includes at least the steps of a primary treatment stage comprising an equilibrium staged separation process 14 having at least one stage for removing at least a fraction of non-acid oxygenated hydrocar
A process for the production of highly purified water 38 from Fischer-Tropsch reaction water 12, includes at least the steps of a primary treatment stage comprising an equilibrium staged separation process 14 having at least one stage for removing at least a fraction of non-acid oxygenated hydrocarbons from the Fischer-Tropsch reaction water 12 to produce a primary water-enriched stream 16, a secondary treatment stage comprising at least one membrane separation process 28 for removing at least some suspended solids and acidic oxygenated hydrocarbons from at least a portion of the primary water-enriched stream 16 to produce a secondary water-enriched stream 34 and a tertiary treatment stage comprising a dissolved salt and organic removal stage 36 for removing at least some dissolved salts and organic constituents from at least a portion of the secondary water-enriched stream 34.
대표청구항▼
What is claimed is: 1. A process for production of a purified water from a Fischer-Tropsch reaction water, the Fischer-Tropsch reaction water comprising at least one component selected from the group consisting of oxygenated hydrocarbons, aliphatic hydrocarbons, aromatic hydrocarbons, cyclic hydroc
What is claimed is: 1. A process for production of a purified water from a Fischer-Tropsch reaction water, the Fischer-Tropsch reaction water comprising at least one component selected from the group consisting of oxygenated hydrocarbons, aliphatic hydrocarbons, aromatic hydrocarbons, cyclic hydrocarbons, inorganic compounds, and mixtures thereof, wherein the process comprises the steps of: a) conducting a distillation or a liquid-liquid extraction of the Fischer-Tropsch reaction water in a primary treatment stage, whereby at least a fraction of non-acid oxygenated hydrocarbons are removed from the Fischer-Tropsch reaction water to produce a primary water-enriched stream; and b) subjecting the primary water-enriched stream to a membrane separation process in a secondary treatment stage, whereby at least some suspended solids and acidic oxygenated hydrocarbons are removed from at least a portion of the primary water-enriched stream, whereby a purified water is obtained, the purified water comprising an aqueous stream having a chemical oxygen demand of from 20 to 500 mg/l, a pH of from 6.0 and 9.0, a suspended solids content of less than 250 mg/l, and a total dissolved solids content of less than 600 mg/l. 2. The process as claimed in claim 1, wherein the non-acid oxygenated hydrocarbons are selected from the group consisting of alcohols, aldehydes, ketones, and mixtures thereof, and wherein the acidic oxygenated hydrocarbons are selected from the group consisting of formic acid, acetic acid, propionic acid, butyric acid, valeric acid, hexanoic acid, heptanoic acid, octanoic acid, and mixtures thereof. 3. The process as claimed in claim 1, wherein the membrane processes used in the secondary treatment stage are selected from the group consisting of micro-filtration, ultra-filtration, reverse osmosis, pervaporation, and combinations thereof. 4. The process as claimed in claim 3, wherein micro-filtration comprises micro-filtration with a capillary polypropylene membrane with a nominal cut-off of 0.2 micrometers or a molecular weight cut-off of 90,000 at a pressure of 1,000 kPa, a pH of from 4 to 7, and a temperature of less than 40째 C. 5. The process as claimed in claim 3, wherein ultra-filtration comprises ultra-filtration with a tubular poly-ether sulphone membrane with a molecular weight cut-off of from 10,000 to 40,000 at a pressure of less than 2,000 kPa, a pH of from 4 to 7, and a temperature of less than 40째 C. 6. The process as claimed in claim 3, wherein reverse osmosis comprises reverse osmosis with a spiral wound poly-amide membrane with a point rejection of greater than 99.6%. 7. The process as claimed in claim 3, wherein reverse osmosis comprises reverse osmosis with a poly-ether composite membrane with a point rejection of greater than 99.6% at a pressure of less than 60 bar, a pH of from 4 to 7, and a temperature of less than 40째 C. 8. The process as claimed in claim 3, wherein pervaporation comprises pervaporation by membrane distillation. 9. The process as claimed in claim 1, wherein a pH of the primary water-enriched stream is adjusted prior to step b), thereby converting organic acids into organic salts. 10. A process for production of a purified water from a Fischer-Tropsch reaction water, the Fischer-Tropsch reaction water comprising at least one component selected from the group consisting of oxygenated hydrocarbons, aliphatic hydrocarbons, aromatic hydrocarbons, cyclic hydrocarbons, inorganic compounds, and mixtures thereof, wherein the process comprises the steps of: a) conducting a distillation or a liquid-liquid extraction of the Fischer-Tropsch reaction water in a primary treatment stage, whereby at least a fraction of non-acid oxygenated hydrocarbons are removed from the Fischer-Tropsch reaction water to produce a primary water-enriched stream; and b) subjecting the primary water-enriched stream to a membrane separation process in a secondary treatment stage, whereby at least some suspended solids and acidic oxygenated hydrocarbons are removed from at least a portion of the primary water-enriched stream, whereby a purified water is obtained, the purified water comprising an aqueous stream having a chemical oxygen demand of from 20 to 500 mg/l, a pH of from 6.0 and 9.0, a suspended solids content of less than 250 mg/l, and a total dissolved solids content of less than 600 mg/l, wherein the membrane separation process is pervaporation with at least one membrane selected from the group consisting of a flat sheet membrane, a chemically cross linked poly-vinyl alcohol membrane, and a membrane comprising a polymer blend of poly-vinyl alcohol and poly-acrylic acid membrane, whereby organics which do not form azeotropes at a pressure of less than 4 mm Hg, a pH of about 7, and a temperature of from 30째 C. to 70째 C. are removed. 11. A process for production of a highly purified water from a Fischer-Tropsch reaction water, the Fischer-Tropsch reaction water comprising at least one component selected from the group consisting of oxygenated hydrocarbons, aliphatic hydrocarbons, aromatic hydrocarbons, cyclic hydrocarbons, inorganic compounds, and mixtures thereof, wherein the process comprises the steps of: a) conducting a distillation or a liquid-liquid extraction of the Fischer-Tropsch reaction water in a primary treatment stage, whereby at least a fraction of non-acid oxygenated hydrocarbons are removed from the Fischer-Tropsch reaction water to produce a primary water-enriched stream; b) subjecting the primary water-enriched stream to a membrane separation process in a secondary treatment stage, whereby at least some suspended solids and acidic oxygenated hydrocarbons are removed from at least a portion of the primary water-enriched stream to produce a secondary water-enriched stream; and c) removing at least some dissolved salts and organic constituents from at least a portion of the secondary water-enriched stream in a tertiary treatment stage, whereby a highly purified water is obtained, the highly purified water comprising an aqueous stream having a chemical oxygen demand of less than 50 mg/l, a pH of from 6.0 to 9.0, a suspended solids content of less than 50 mg/l, and a total dissolved solids content of less than 100 mg/l. 12. The process as claimed in claim 11, wherein the non-acid oxygenated hydrocarbons are selected from the group consisting of alcohols, aldehydes, ketones, and mixtures thereof, and wherein the acidic oxygenated hydrocarbons are selected from the group consisting of formic acid, acetic acid, propionic acid, butyric acid, valeric acid, hexanoic acid, heptanoic acid, octanoic acid, and mixtures thereof. 13. The process as claimed in claim 11, wherein the membrane processes used in the secondary treatment stage are selected from the group consisting of micro-filtration, ultra-filtration, reverse osmosis, pervaporation, and combinations thereof. 14. The process as claimed in claim 13, wherein micro-filtration comprises micro-filtration with a capillary polypropylene membrane with a nominal cut-off of 0.2 micrometers or a molecular weight cut-off of 90,000 at a pressure of 1,000 kPa, a pH of from 4 to 7, and a temperature of less than 40째 C. 15. The process as claimed in claim 13, wherein ultra-filtration comprises ultra-filtration with a tubular poly-ether sulphone membrane with a molecular weight cut-off of from 10,000 to 40,000 at a pressure of less than 2,000 kPa, a pH of from 4 to 7, and a temperature of less than 40째 C. 16. The process as claimed in claim 13, wherein reverse osmosis comprises reverse osmosis with a spiral wound poly-amide membrane with a point rejection of greater than 99.6%. 17. The process as claimed in claim 13, wherein reverse osmosis comprises reverse osmosis with a poly-ether composite membrane with a point rejection of greater than 99.6% at a pressure of less than 60 bar, a pH of from 4 to 7, and a temperature of less than 40째 C. 18. The process as claimed in claim 13, wherein pervaporation comprises pervaporation by membrane distillation. 19. The process as claimed in claim 11, wherein a pH of the primary water-enriched stream is adjusted prior to step b), thereby converting organic acids into organic salts. 20. A process for production of a highly purified water from a Fischer-Tropsch reaction water, the Fischer-Tropsch reaction water comprising at least one component selected from the group consisting of oxygenated hydrocarbons, aliphatic hydrocarbons, aromatic hydrocarbons, cyclic hydrocarbons, inorganic compounds, and mixtures thereof, wherein the process comprises the steps of: a) conducting a distillation or a liquid-liquid extraction of the Fischer-Tropsch reaction water in a primary treatment stage, whereby at least a fraction of non-acid oxygenated hydrocarbons are removed from the Fischer-Tropsch reaction water to produce a primary water-enriched stream: b) subjecting the primary water-enriched stream to a membrane separation process in a secondary treatment stage, whereby at least some suspended solids and acidic oxygenated hydrocarbons are removed from at least a portion of the primary water-enriched stream to produce a secondary water-enriched stream, wherein the membrane processes used in the secondary treatment stage is pervaporation with at least one membrane selected from the group consisting of a flat sheet membrane, a chemically cross linked poly-vinyl alcohol membrane, and a membrane comprising a polymer blend of poly-vinyl alcohol and poly-acrylic acid membrane, whereby organics which do not form azeotropes at a pressure of less than 4 mm Hg, a pH of about 7, and a temperature of from 30째 C. to 70째 C. are removed; and c) removing at least some dissolved salts and organic constituents from at least a portion of the secondary water-enriched stream in a tertiary treatment stage, whereby a highly purified water is obtained, the highly purified water comprising an aqueous stream having a chemical oxygen demand of less than 50 mg/l, a pH of from 6.0 to 9.0, a suspended solids content of less than 50 mg/l, and a total dissolved solids content of less than 100 mg/l. 21. The process as claimed in claim 11, wherein the organic constituents removed during the tertiary treatment stage are selected from the group consisting of acetaldehyde, propionaldehyde, butyraldehyde, acetone, methyl propyl ketone, methanol, ethanol, propanol, butanol, pentanol, hexanol, heptanol, formic acid, acetic acid, propionic acid, butyric acid, valeric acid, and mixtures thereof. 22. The process as claimed in claim 11, wherein step c) comprises removing dissolved salts from the secondary water-enriched stream by a method selected from the group consisting of ion exchange, high rejection reverse osmosis, methods using activated carbon, methods using organic scavenger resins, methods using chemical oxidation, and combinations thereof.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (14)
Kuroshita Kazumasa (Kawasaki JPX) Ishida Toshihiro (Kawasaki JPX) Sekihata Osamu (Kawasaki JPX), Bus load distributing method suitable for data communications equipment and bus switching control device for data commun.
Zhang, Jianping; Espinoza, Rafael L.; Mohedas, Sergio R.; Ortego, Beatrice C., Method for reducing the maximum water concentration in a multi-phase column reactor.
Yarrington Robert M. (Westfield NJ) Buchanan William (Westfield NJ), Preparation of normally liquid hydrocarbons and a synthesis gas to make the same, from a normally gaseous hydrocarbon fe.
Grieves Colin G. (Batavia IL) Baechle Robert J. (Savannah GA) Considine John M. (Savannah GA) Bristow Lawrence M. (Savannah GA), Process for treating sour water in oil refineries.
Belt, Barbara A.; Kopponen, Sara Irina; Goodwin, III, Ralph T.; Raven, Mariella L.; Beck, Blaine E., Conversion of produced oxygenates to hydrogen or synthesis gas in a carbon-to-liquids process.
Miglio, Roberta; Carnelli, Lino; Clerici, Gabriele Carlo Ettore; Zennaro, Roberto, Process for the purification of an aqueous stream coming from the fischer-tropsch reaction.
Miglio, Roberta; Bignazzi, Renzo, Process for the treatment of the aqueous stream coming from the fischer-tropsch reaction by means of ion exchange resins.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.