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公开(公告)号：CA1145289A
公开(公告)日：1983-04-26
申请号：CA347097
申请日：1980-03-06
Applicant: BASF AG
Inventor： VOLKAMER KLAUS , BROELLOS KLAUS , LINDNER ALFRED , WAGNER ULRICH , WEITZ HANS-MARTIN , SCHNEIDER KLAUS-JUERGEN
Abstract: of the disclosure: A process for isolating a conjugated diolefin from a C4- or C5-hydrocarbon mixture containing the diolefin, by single-stage or multi-stage extractive distillation using a selective solvent, wherein the selective solvent is a solvent mixture which comprises (a) from 50 to 98 percent by weight of an N-alkyl-substituted lower aliphatic acid amide or of an N-alkyl-substituted alicyclic acid amide having 5 ring members and (b) from 2 to 50 percent by weight of an aliphatic ether boiling at from 30.degree.C to 200.degree. of the general formula R-O-R', where the aliphatic radical R is a hydrocarbon radical of 1 to 6 carbon atoms and the aliphatic radical R' is a hydrocarbon radical of 2 to 6 carbon atoms, or a dialkyl ether of a dihydric alcohol boiling at from 30.degree.C to 200.degree.C, of the general formula R1-¢OCH2-CHR-!nOR2, where R is hydrogen or CH3, R1 and R2 are each a hydrocarbon radical of 1 to 5 carbon atoms, and n is an integer from 1 to 3, or an alicyclic ether boiling at from 50.degree.C to 125.degree.C.
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Patent Agency Ranking
公开(公告)号：NO821058L
公开(公告)日：1982-10-01
申请号：NO821058
申请日：1982-03-30
Applicant: BASF AG
Inventor： WAGNER ECKHART , WAGNER ULRICH , VOLKAMER KLAUS , VODRAZKA WOLFGANG
Abstract: A process for removing condensable aliphatic hydrocarbons and acidic gases such as H2S, CO2 and COS from natural gas containing these, wherein the natural gas is initially treated with polyethylene glycol dialkyl ethers, as the solvent, in a first absorption stage to effect absorption of the condensable aliphatic hydrocarbons; the natural gas drawn off from the first absorption stage is then treated with polyethylene glycol dialkyl ethers, as the solvent, under superatmospheric pressure in a second absorption stage, the acidic gases being completely or partly absorbed; the solvent charged with the condensable aliphatic hydrocarbons which is obtained from the first absorption stage is treated with water in an extraction stage, to form a hydrocarbon phase containing the condensable aliphatic hydrocarbons and an aqueous dialkyl ether phase, and the hydrocarbon phase is separated from the aqueous dialkyl ether phase. The solvent charged with acid gases which is obtained from the second absorption stage is regenerated by expansion and/or stripping in a regeneration stage and the regenerated solvent is recycled to the absorption.
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公开(公告)号：NO821058A
公开(公告)日：1982-10-01
申请号：NO821058
申请日：1982-03-30
Applicant: BASF AG
Inventor： WAGNER ECKHART , WAGNER ULRICH , VOLKAMER KLAUS , VODRAZKA WOLFGANG
CPC classification number: C10G5/04 , B01D53/1456 , B01D53/1487 , B01D53/1493 , C07C7/11 , C10G2300/1025 , C07C9/04
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公开(公告)号：AU520943B2
公开(公告)日：1982-03-11
申请号：AU3861778
申请日：1978-08-03
Applicant: BASF AG
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公开(公告)号：GB1094992A
公开(公告)日：1967-12-13
申请号：GB939765
申请日：1965-03-05
Applicant: BASF AG
Inventor： WEITZ HANS-MARTIN , KROEPER HUGO , WAGNER ULRICH , RITZ JOSEF
Abstract: Cyclopentadiene is recovered from C5 hydrocarbon containing diolefins, prior to the separation of isoprene, by counter-current contact with sufficient selective solvent to dissolve substantially only the cyclopentadiene, the solvent being a heterocyclic compound having a nitrogen or oxygen heteroatom adjacent to a single carbonyl group, contacting the resultant solution with an inert liquid or gas to remove dissolved diolefins other than cyclopentadiene and expelling cyclopentadiene from the remaining solution; recovered solvent may be recycled preferably after removing cyclopentadiene dimer from a bleed stream. The solvent may be a lactam, lactone, N-alkyllactam, N-hydroxyalkyllactam, N-acylpyrrolidine or N-acylpiperidine, and may contain up to 40% of water; preferably the same solvent is used in the subsequent isoprene recovery. In a preferred embodiment the mixture as a gas enters tower 1 by line 4 and the solvent by line 5. The solution is passed to tower 2 where it is contacted with an inert gas, e.g. cyclopentadiene, hydrocarbons less soluble than diolefins, nitrogen or steam; in an example C5 gas from the process after removal of isoprene enters by line 8 and steam by line 9. In the absence of steam, heat may also be applied. The gases obtained are returned to tower 1 by line 4. From the bottom solution then enters tower 3 where it is heated to expel cyclopentadiene recovered as a side stream 10. Overhead gases may be returned to tower 2 as all or part of the stripping gas. The gas-liquid absorption step may be replaced by liquid-liquid absorption using a counter-solvent (hydrocarbons) or anti-solvent (water) introduced near the point of removal of solution, or by an extractive distillation.
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公开(公告)号：GB974879A
公开(公告)日：1964-11-11
申请号：GB4377562
申请日：1962-11-20
Applicant: BASF AG
Inventor： KROEPER HUGO , WAGNER ULRICH , WEITZ HANS-MARTIN
IPC: C07C7/11
Abstract: Conjugated 1,3-dienes with 4 or 5 carbon atoms are separated from mixtures of the said diene and up to 5% by weight of C4-C5 alkynes and C4-C5 1,2-alkadienes, by passing the mixture at -10 DEG to + 150 DEG C. at 1-15 atmospheres absolute pressure counter-currently to a liquid stream of a selective solvent, said solvent being furfural, acetonitrile, saturated lactams or lactones with 4 or 5 carbon atoms in the ring, N-alkyl substituted lactams with 4 or 5 carbon atoms in the ring and 1-4 carbon atoms in the N-alkyl group, N-hydroxyalkyl lactams with 4 or 5 carbon atoms in the ring and 1-4 carbon atoms in the N-hydroxyalkyl group, or N-acylated cyclic amines with 4 or 5 carbon atoms and a nitrogen atom in the ring and 1-3 carbon atoms in the N-acyl group. The solvent may be used in pure form or in admixture with up to 25% by weight of water. The examples describe the separation of 1,3-butadiene from 1,2-butadiene and 1- and 2-butyne and isoprene from 3-methyl-1,2-butadiene and 1- and 2-pentyne.
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