Patents
US 8609879 B2: Method for the separation of acetonitrile from water
- Granted
- 2013-12-17
- Filed
- 2010-07-16 application 12837962
- Type
- Utility · 37 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method for separating acetonitrile from water, comprising (i) providing a stream S1 containing at least 95 wt.-%, based on the total weight of S1, acetonitrile and water, wherein the weight ratio of acetonitrile: water is greater than 1; (ii) adding a stream P, comprising at least 95 wt.-% C3, based on the total weight of stream P, to S1 to obtain a mixed stream S2, C3 being propene optionally admixed with propane with a minimum weight ratio of propene: propane of 7:3; (iii) subjecting S2 to a temperature of 92° C. at most and a pressure of at least 10 bar, obtaining a first liquid phase L1 essentially consisting of C3, acetonitrile, and water, and a second liquid phase L2 essentially consisting of water and acetonitrile wherein the weight ratio of acetonitrile: water in L2 is less than 1; (iv) separating L1 from L2.
Source: PVGPATDIS, file of 2026-04-10 (ipg131217.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| BASF SE 6,481 patents | Foreign company or organization | Ludwigshafen, DE | PVGPATDIS, file of 2026-04-10 | |
| THE DOW CHEMICAL COMPANY 17 patents | US company or organization | Midland, MI | THE DOW CHEMICAL COMPANY Federal lobbying client EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Joaquim Henrique Teles | Otterstadt, DE | 109 | PVGPATDIS, file of 2026-04-10 | |
| Hans-Georg Gobbel | Kallstadt, DE | 1 | PVGPATDIS, file of 2026-04-10 | |
| Peter Baβler | Viernheim, DE | 2 | PVGPATDIS, file of 2026-04-10 | |
| Philip Kampe | Lorsch, DE | 10 | PVGPATDIS, file of 2026-04-10 | |
| Kai Gumlich | Mannheim, DE | 15 | PVGPATDIS, file of 2026-04-10 | |
| Christian Bartosch | Mannheim, DE | 12 | PVGPATDIS, file of 2026-04-10 | |
| Ulrich Müller | Neustadt, DE | 96 | PVGPATDIS, file of 2026-04-10 | |
| Richard Jacubinas | Bloomfield, NJ | 8 | PVGPATDIS, file of 2026-04-10 | |
| Natalia Trukhan | Ludwigshafen, DE | 15 | PVGPATDIS, file of 2026-04-10 | |
| Meinolf Weidenbach | Drochtersen, DE | 14 | PVGPATDIS, file of 2026-04-10 | |
| Martin A. Cogswell | Petrolia, CA | 2 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C07D | Heterocyclic compounds | C07D301/12 | PVGPATDIS, file of 2026-04-10 |
| B01D | Separation | B01D17/0208 | PVGPATDIS, file of 2026-04-10 |
| Y02P | Climate change mitigation technologies in the production or processing of goods | Y02P20/582 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2012-04-12 | Assignment Assignment of assignor's interest | DOW STADE PRODUKTIONS GMBH & CO. OHG signed 2010-10-18 | THE DOW CHEMICAL COMPANY MIDLAND, MI | 28035/945 | ECORSEXC, file of 2026-09-25 |
| 2012-04-12 | Correction Corrective assignment to correct the assignee previously recorded on reel 026597 frame 0483. assignor(s) hereby confirms the assignment of assignor's interest. | WEIDENBACH, MEINOLF signed 2010-01-07 | DOW STADE PRODUKTIONS GMBH & CO. OHG STADE | 28035/857 | ECORSEXC, file of 2026-09-25 |
| 2011-07-19 | Assignment Assignment of assignor's interest | DOW CHEMICAL CANADA INC. signed 2010-08-31 | THE DOW CHEMICAL COMPANY MIDLAND, MI | 26612/713 | ECORSEXC, file of 2026-09-25 |
| 2011-07-19 | Assignment Assignment of assignor's interest | JACUBINAS, RICHARD signed 2010-07-20 TELES, JOAQUIM HENRIQUE signed 2010-08-20 GOEBBEL, HANS-GEORG signed 2010-08-24 BASSLER, PETER signed 2010-08-25 KAMPE, PHILIP signed 2010-08-26 MUELLER, ULRICH signed 2010-08-26 TRUKHAN, NATALIA signed 2010-09-15 GUMLICH, KAI signed 2010-09-16 BARTOSCH, CHRISTIAN signed 2010-09-21 | BASF SE LUDWIGSHAFEN | 26612/677 | ECORSEXC, file of 2026-09-25 |
| 2011-07-15 | Assignment Assignment of assignor's interest | WEIDENBACH, MEINOLF signed 2010-01-07 | DOW DEUTSCHLAND GMBH & CO. OHG SCHWALBACH | 26597/483 | ECORSEXC, file of 2026-09-25 |
| 2011-07-15 | Assignment Assignment of assignor's interest | COGSWELL, MARTIN signed 2010-08-24 | DOW CHEMICAL CANADA INC. ALBERTA | 26597/462 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.