DE2420471B2 - Verfahren zur Abtrennung und Rückgewinnung von Restmonomeren aus wäßrigen Dispersionen von Acrylnitrilpolymerisaten - Google Patents
Verfahren zur Abtrennung und Rückgewinnung von Restmonomeren aus wäßrigen Dispersionen von AcrylnitrilpolymerisatenInfo
- Publication number
- DE2420471B2 DE2420471B2 DE2420471A DE2420471A DE2420471B2 DE 2420471 B2 DE2420471 B2 DE 2420471B2 DE 2420471 A DE2420471 A DE 2420471A DE 2420471 A DE2420471 A DE 2420471A DE 2420471 B2 DE2420471 B2 DE 2420471B2
- Authority
- DE
- Germany
- Prior art keywords
- polymer
- vapors
- thin
- monomers
- percent
- 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.)
- Ceased
Links
- 239000000178 monomer Substances 0.000 title claims description 66
- 238000000034 method Methods 0.000 title claims description 42
- 239000006185 dispersion Substances 0.000 title claims description 16
- 238000000926 separation method Methods 0.000 title claims description 12
- 238000011084 recovery Methods 0.000 title claims description 8
- 229920002239 polyacrylonitrile Polymers 0.000 title claims description 5
- 239000004815 dispersion polymer Substances 0.000 claims description 27
- 239000010409 thin film Substances 0.000 claims description 27
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 23
- 239000007791 liquid phase Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 14
- 238000001704 evaporation Methods 0.000 claims description 12
- 238000006116 polymerization reaction Methods 0.000 claims description 12
- 230000008020 evaporation Effects 0.000 claims description 9
- 239000003380 propellant Substances 0.000 claims description 9
- 238000004821 distillation Methods 0.000 claims description 8
- 239000012071 phase Substances 0.000 claims description 8
- 239000008346 aqueous phase Substances 0.000 claims description 5
- 238000001577 simple distillation Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 30
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 15
- 238000009833 condensation Methods 0.000 description 10
- 230000005494 condensation Effects 0.000 description 10
- 238000009835 boiling Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 6
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 5
- 238000007334 copolymerization reaction Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000010626 work up procedure Methods 0.000 description 4
- 239000012736 aqueous medium Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- UZKWTJUDCOPSNM-UHFFFAOYSA-N 1-ethenoxybutane Chemical compound CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 2
- ZGHFDIIVVIFNPS-UHFFFAOYSA-N 3-Methyl-3-buten-2-one Chemical compound CC(=C)C(C)=O ZGHFDIIVVIFNPS-UHFFFAOYSA-N 0.000 description 2
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Substances C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- FUSUHKVFWTUUBE-UHFFFAOYSA-N buten-2-one Chemical compound CC(=O)C=C FUSUHKVFWTUUBE-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000000578 dry spinning Methods 0.000 description 2
- FJKIXWOMBXYWOQ-UHFFFAOYSA-N ethenoxyethane Chemical compound CCOC=C FJKIXWOMBXYWOQ-UHFFFAOYSA-N 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 238000004383 yellowing Methods 0.000 description 2
- OZCMOJQQLBXBKI-UHFFFAOYSA-N 1-ethenoxy-2-methylpropane Chemical compound CC(C)COC=C OZCMOJQQLBXBKI-UHFFFAOYSA-N 0.000 description 1
- LWJHSQQHGRQCKO-UHFFFAOYSA-N 1-prop-2-enoxypropane Chemical compound CCCOCC=C LWJHSQQHGRQCKO-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- PHMRPWPDDRGGGF-UHFFFAOYSA-N 2-bromoprop-1-ene Chemical compound CC(Br)=C PHMRPWPDDRGGGF-UHFFFAOYSA-N 0.000 description 1
- GNUGVECARVKIPH-UHFFFAOYSA-N 2-ethenoxypropane Chemical compound CC(C)OC=C GNUGVECARVKIPH-UHFFFAOYSA-N 0.000 description 1
- HCHJSQGMAQVHNO-UHFFFAOYSA-N 2-prop-2-enoxypropane Chemical compound CC(C)OCC=C HCHJSQGMAQVHNO-UHFFFAOYSA-N 0.000 description 1
- OHXAOPZTJOUYKM-UHFFFAOYSA-N 3-Chloro-2-methylpropene Chemical compound CC(=C)CCl OHXAOPZTJOUYKM-UHFFFAOYSA-N 0.000 description 1
- FASUFOTUSHAIHG-UHFFFAOYSA-N 3-methoxyprop-1-ene Chemical compound COCC=C FASUFOTUSHAIHG-UHFFFAOYSA-N 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- INLLPKCGLOXCIV-UHFFFAOYSA-N bromoethene Chemical compound BrC=C INLLPKCGLOXCIV-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- ULYZAYCEDJDHCC-UHFFFAOYSA-N isopropyl chloride Chemical compound CC(C)Cl ULYZAYCEDJDHCC-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- JFZUABNDWZQLIJ-UHFFFAOYSA-N methyl 2-[(2-chloroacetyl)amino]benzoate Chemical compound COC(=O)C1=CC=CC=C1NC(=O)CCl JFZUABNDWZQLIJ-UHFFFAOYSA-N 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 150000003839 salts Chemical group 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000002166 wet spinning Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F6/00—Post-polymerisation treatments
- C08F6/14—Treatment of polymer emulsions
- C08F6/16—Purification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0082—Regulation; Control
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S159/00—Concentrating evaporators
- Y10S159/10—Organic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S526/00—Synthetic resins or natural rubbers -- part of the class 520 series
- Y10S526/922—Polymerization process of ethylenic monomers using manipulative technique
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Priority Applications (15)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2420471A DE2420471B2 (de) | 1974-04-27 | 1974-04-27 | Verfahren zur Abtrennung und Rückgewinnung von Restmonomeren aus wäßrigen Dispersionen von Acrylnitrilpolymerisaten |
| US05/569,932 US3980529A (en) | 1974-04-27 | 1975-04-21 | Process for separating and recovering residual monomers from aqueous suspensions of acrylonitrile polymers |
| GB17011/75A GB1499732A (en) | 1974-04-27 | 1975-04-24 | Process for separating and recovering residual monomers from aqueous suspensions of acrylonitrile polymers |
| DK180175AA DK138954B (da) | 1974-04-27 | 1975-04-24 | Fremgangsmaade til fraskillelse og genvinding af restmonomere fra vandige suspensioner af acrylonitrilpolymerisater |
| IT22754/75A IT1037646B (it) | 1974-04-27 | 1975-04-24 | Procedimento per la separazione e il ricupero di monomeri residui da sospensioni acquose di polimeri di acrilonitrile |
| NL7504961A NL7504961A (nl) | 1974-04-27 | 1975-04-25 | Werkwijze voor het afscheiden en het terugwin- nen van resterende monomeren uit waterrijke suspensies van acrylonitrilepolymeren. |
| CA225,486A CA1036296A (en) | 1974-04-27 | 1975-04-25 | Process for separating and recovering residual monomers from aqueous suspensions of acrylonitrile polymers |
| AT319075A AT342864B (de) | 1974-04-27 | 1975-04-25 | Verfahren zur abtrennung und ruckgewinnung von restmonomeren aus wasserigen suspensionen von acrylnitrilpolymerisaten |
| JP50049878A JPS517094A (OSRAM) | 1974-04-27 | 1975-04-25 | |
| BR3205/75A BR7502525A (pt) | 1974-04-27 | 1975-04-25 | Processo para separar e recuperar acrilonitrila nao reagida e comonomeros |
| ES436994A ES436994A1 (es) | 1974-04-27 | 1975-04-25 | Procedimiento para separar y recuperar monomeros residuales a partir de suspensiones acuosas de polimeros de acriloni- trilo. |
| LU72359A LU72359A1 (OSRAM) | 1974-04-27 | 1975-04-25 | |
| BE155763A BE828381A (fr) | 1974-04-27 | 1975-04-25 | Procede de separation et de recuperation de monomeres residuels a partir de suspensions aqueuses de polymeres d'acrylunitrile |
| FR7513109A FR2268813B1 (OSRAM) | 1974-04-27 | 1975-04-25 | |
| IE928/75A IE41234B1 (en) | 1974-04-27 | 1975-04-25 | A process for seperating and recovering residual monomers from aqueous suspensions of acrylonitrile polymers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2420471A DE2420471B2 (de) | 1974-04-27 | 1974-04-27 | Verfahren zur Abtrennung und Rückgewinnung von Restmonomeren aus wäßrigen Dispersionen von Acrylnitrilpolymerisaten |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2420471A1 DE2420471A1 (de) | 1975-11-06 |
| DE2420471B2 true DE2420471B2 (de) | 1979-01-25 |
Family
ID=5914138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2420471A Ceased DE2420471B2 (de) | 1974-04-27 | 1974-04-27 | Verfahren zur Abtrennung und Rückgewinnung von Restmonomeren aus wäßrigen Dispersionen von Acrylnitrilpolymerisaten |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US3980529A (OSRAM) |
| JP (1) | JPS517094A (OSRAM) |
| AT (1) | AT342864B (OSRAM) |
| BE (1) | BE828381A (OSRAM) |
| BR (1) | BR7502525A (OSRAM) |
| CA (1) | CA1036296A (OSRAM) |
| DE (1) | DE2420471B2 (OSRAM) |
| DK (1) | DK138954B (OSRAM) |
| ES (1) | ES436994A1 (OSRAM) |
| FR (1) | FR2268813B1 (OSRAM) |
| GB (1) | GB1499732A (OSRAM) |
| IE (1) | IE41234B1 (OSRAM) |
| IT (1) | IT1037646B (OSRAM) |
| LU (1) | LU72359A1 (OSRAM) |
| NL (1) | NL7504961A (OSRAM) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4151141A (en) * | 1977-11-16 | 1979-04-24 | The Dow Chemical Company | Process for continuously removing volatile organic material from aqueous dispersions of synthetic polymers |
| IT1121511B (it) * | 1979-05-28 | 1986-04-02 | Montedison Spa | Procedimento per l'estrazione del cloruro di vinile monomero dai lattici di cloruro di polivinile ed apparecchiatura per la sua realizzazione |
| DE2948541A1 (de) * | 1979-12-03 | 1981-06-04 | Nukem Gmbh, 6450 Hanau | Verfahren und vorrichtung zur mehrstufigen verdampfung |
| US4414063A (en) * | 1982-04-12 | 1983-11-08 | E. I. Du Pont De Nemours & Co. | Removing residual acrylonitrile in aqueous dispersions |
| DE3531834C1 (de) * | 1985-09-06 | 1986-09-18 | Starcosa Gmbh, 3300 Braunschweig | Pervaporationsverfahren |
| IT1226303B (it) * | 1988-07-26 | 1990-12-27 | Montedipe Spa | Processo ed apparato per la devolatilizzazione di soluzioni di polimeri. |
| US7128815B2 (en) * | 2003-03-25 | 2006-10-31 | Council Of Scientific And Industrial Research | Process for recovery of pure acrylonitrile |
| CN100402493C (zh) * | 2003-03-31 | 2008-07-16 | 科学与工业研究委员会 | 回收纯丙烯腈的方法 |
| CN106317296B (zh) * | 2015-06-18 | 2018-07-06 | 中国石油化工股份有限公司 | 用于干法腈纶的单体回收工艺 |
| CN108569739B (zh) * | 2018-03-22 | 2021-05-14 | 福建三农新材料有限责任公司 | 用于回收聚四氟乙烯浓缩分散液废液中op-10的系统及方法 |
| US10731001B2 (en) * | 2018-11-09 | 2020-08-04 | Arkema France | Method for the recovery of compounds deriving from the synthesis of poly aryl ether ketone polymers |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2348328A (en) * | 1941-01-10 | 1944-05-09 | Du Pont | Process of and apparatus for treating sulphuric acid containing dissolved nitro bodies |
| US3073380A (en) * | 1962-03-27 | 1963-01-15 | Parkson Ind Equipment Company | Concentration of foaming materials |
| US3223534A (en) * | 1962-11-07 | 1965-12-14 | Libby Mcneill & Libby | Method of improving flavor constituents |
| NL129660C (OSRAM) * | 1964-08-24 | |||
| US3467162A (en) * | 1966-07-11 | 1969-09-16 | Charles W Putnam | Process of making concentrated phosphoric acid of improved clarity characteristics |
| BE758596A (fr) * | 1969-11-08 | 1971-05-06 | Basf Ag | Procede pour l'elimination de monomeres volatils a partir de solutions de polymeres d'acrylonitrile ainsi que leur concentration |
-
1974
- 1974-04-27 DE DE2420471A patent/DE2420471B2/de not_active Ceased
-
1975
- 1975-04-21 US US05/569,932 patent/US3980529A/en not_active Expired - Lifetime
- 1975-04-24 IT IT22754/75A patent/IT1037646B/it active
- 1975-04-24 GB GB17011/75A patent/GB1499732A/en not_active Expired
- 1975-04-24 DK DK180175AA patent/DK138954B/da unknown
- 1975-04-25 AT AT319075A patent/AT342864B/de not_active IP Right Cessation
- 1975-04-25 IE IE928/75A patent/IE41234B1/xx unknown
- 1975-04-25 BE BE155763A patent/BE828381A/xx unknown
- 1975-04-25 NL NL7504961A patent/NL7504961A/xx not_active Application Discontinuation
- 1975-04-25 JP JP50049878A patent/JPS517094A/ja active Pending
- 1975-04-25 CA CA225,486A patent/CA1036296A/en not_active Expired
- 1975-04-25 LU LU72359A patent/LU72359A1/xx unknown
- 1975-04-25 FR FR7513109A patent/FR2268813B1/fr not_active Expired
- 1975-04-25 BR BR3205/75A patent/BR7502525A/pt unknown
- 1975-04-25 ES ES436994A patent/ES436994A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2268813B1 (OSRAM) | 1979-03-30 |
| CA1036296A (en) | 1978-08-08 |
| IE41234B1 (en) | 1979-11-21 |
| DK138954B (da) | 1978-11-20 |
| ES436994A1 (es) | 1977-01-16 |
| DE2420471A1 (de) | 1975-11-06 |
| GB1499732A (en) | 1978-02-01 |
| FR2268813A1 (OSRAM) | 1975-11-21 |
| ATA319075A (de) | 1977-08-15 |
| IE41234L (en) | 1975-10-27 |
| LU72359A1 (OSRAM) | 1976-03-17 |
| BE828381A (fr) | 1975-10-27 |
| JPS517094A (OSRAM) | 1976-01-21 |
| US3980529A (en) | 1976-09-14 |
| AT342864B (de) | 1978-04-25 |
| BR7502525A (pt) | 1976-04-13 |
| IT1037646B (it) | 1979-11-20 |
| NL7504961A (nl) | 1975-10-29 |
| DK180175A (da) | 1975-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2804449C2 (de) | Verfahren zum Inhibieren der Polymerisation einer leicht polymerisierbaren aromatischen Vinylverbindung | |
| DE2437846C2 (OSRAM) | ||
| DE69221610T2 (de) | Verfahren zur herstellung von terephtalsäure | |
| DE3102948C2 (OSRAM) | ||
| DE1618755A1 (de) | Verfahren zur Reinigung von AEthylenglykol | |
| DE2135806A1 (de) | Verfahren zur Entfernung von PoIymeren-Rückst änden | |
| DE2504417A1 (de) | Verfahren zur herstellung von methylmethacrylatpolymerisaten | |
| DE2164767A1 (OSRAM) | ||
| DE2420471B2 (de) | Verfahren zur Abtrennung und Rückgewinnung von Restmonomeren aus wäßrigen Dispersionen von Acrylnitrilpolymerisaten | |
| DE2552683A1 (de) | Verfahren zum abziehen nicht-umgesetzter monoolefinischer monomerer | |
| DE2626561C2 (OSRAM) | ||
| DE1570989B1 (de) | Verfahren zur Wiedergewinnung von Acrylnitril und einem oder mehreren anderen Vinylmonomeren aus einer durch Polymerisation erhaltenen Aufschlaemmung | |
| DE69010083T2 (de) | Kontinuierliches Verfahren zur Trennung von teils in wasserlöslichen Bestandteilen aus einem Schlamm. | |
| DE1956286A1 (de) | Verfahren zum Entfernen von fluechtigen Monomeren aus Acrylnitrilpolymerisat-Loesungen sowie deren Konzentrierung | |
| DE2816568C2 (OSRAM) | ||
| DE4302539C2 (de) | Kalk-und/oder Magnesiumhydroxid-Aufschlämmung und ihre Herstellung | |
| DE2914342A1 (de) | Verfahren zur rueckgewinnung nicht umgesetzter olefinischer monomerverbindungen | |
| DE69011860T2 (de) | Verfahren zur herstellung von polyvinylalkoholmischungen in wässeriger lösung und erhaltene produkte. | |
| DE2628700C2 (de) | Verfahren zur Entfernung von Vinylchloridmonomer aus Polyvinylchloridpolymeren und Copolymeren | |
| EP1048646B1 (de) | Verfahren zur kontinuierlichen Destillation von thermolabilen Monomeren | |
| DE2530895C2 (de) | Verfahren zur Dehydratisierung von Maleinsäure zu Maleinsäureanhydrid | |
| DE1543815A1 (de) | Verfahren zur Herstellung von sehr reinem Trioxan | |
| DE19711925B4 (de) | Verfahren zur Reinigung von N-Vinylformamid | |
| DE2432411A1 (de) | Verfahren zur abtrennung und wiedergewinnung von schwefeldioxid und monomer aus einem bei der herstellung von acrylnitrilpolymerisaten anfallenden polymerisationsgemisch | |
| DE2441289B2 (de) | Verfahren zur Verringerung des Gehaltes an monomeren Vinylchlorid in Polymerisaten des Vinylchlorids |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8235 | Patent refused | ||
| 8235 | Patent refused |