UST875023I4 - Continuous melt phase manufacture of - Google Patents

Continuous melt phase manufacture of Download PDF

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Publication number
UST875023I4
UST875023I4 US875023DH UST875023I4 US T875023 I4 UST875023 I4 US T875023I4 US 875023D H US875023D H US 875023DH US T875023 I4 UST875023 I4 US T875023I4
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United States
Prior art keywords
melt phase
continuous melt
phase manufacture
molecular weight
low molecular
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Publication of UST875023I4 publication Critical patent/UST875023I4/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
    • B01J10/005—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor carried out at high temperatures in the presence of a molten material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
    • C08G69/28—Preparatory processes

Definitions

  • Water-free, low molecular weight polyamides may be prepared from aqueous solutions of polyamide salts un der superatmospheric pressure by passing a solution of a polyamide salt through a plurality of heated zones at a superatmospheric pressure while under essentially plugflow conditions, the zones being heated to a temperature sufficient to eliminate water in vapor form from the resulting low molecular weight polyamide, and the zones providing a decreasing ratio of heating surface to volume of material being treated in the direction of flow, and withdrawing a substantially water-free low molecular weight polyamide from the last of the zones at a pressure below thatof the said last zone.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Glass Compositions (AREA)

Description

DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.
Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED JUNE 23, 1970 T875,023 CONTINUOUS MELT PHASE MANUFACTURE OF LOW MOLECULAR WEIGHT POLYAMIDES M B Knowles, Harrell Julian Lewis, and Roy Clilford Stephens, all of PD. Box 511, Kingsport, Tenn.
37662 Continuation of application Ser. No. 685,734, Nov. 16,
1967. This application Dec. 12, 1969, Ser. No. 880,506 Int. Cl. C08g 20/20 US. Cl. 260-78 2 Sheets Drawing. 18 Pages Specification Water-free, low molecular weight polyamides may be prepared from aqueous solutions of polyamide salts un der superatmospheric pressure by passing a solution of a polyamide salt through a plurality of heated zones at a superatmospheric pressure while under essentially plugflow conditions, the zones being heated to a temperature sufficient to eliminate water in vapor form from the resulting low molecular weight polyamide, and the zones providing a decreasing ratio of heating surface to volume of material being treated in the direction of flow, and withdrawing a substantially water-free low molecular weight polyamide from the last of the zones at a pressure below thatof the said last zone.
June 23, 1970 l M.B.KNOIWLES ETAL T T875,023
CONTINUOUS MELT PHASE MANUFACTURE OF I LOW MOLECULAR WEIGHT POLYAMIDES Original F'uea Nov 16, 1967 FIG? 2 Sheets-Sheet 1 INVENTORS MB KNOWLES HARRELL J. LEWIS ROY C. STEPHENS Jaw ATTORNEYS M. B. KNOWLES ET AL T875,023
coumuuous MELT PHASE MANUrnuIURE 01- LOW MOLECULAR WEIGHT POLYAMIDES June 23, N10
Original Fneu NOV 16, 1967 2 Sheets- Sheet 2 a j r Y l5 T --fi I 7 7 7 F F 7 A Z Z -1... -4 K I INVENTORS MB KNOWLES HARRELL J. LEWIS ROY o STEPHENS ATTORNEYS
US875023D 1969-12-12 1969-12-12 Continuous melt phase manufacture of Pending UST875023I4 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88050669A 1969-12-12 1969-12-12

Publications (1)

Publication Number Publication Date
UST875023I4 true UST875023I4 (en) 1970-06-23

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ID=25376424

Family Applications (1)

Application Number Title Priority Date Filing Date
US875023D Pending UST875023I4 (en) 1969-12-12 1969-12-12 Continuous melt phase manufacture of

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US (1) UST875023I4 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6075117A (en) * 1998-12-21 2000-06-13 E.I. Dupont De Nemours & Company Process for the hydrolysis of adiponitrile and the production of nylon 6,6 using dicarboxylic acids as the sole catalyst
US6084056A (en) * 1998-12-22 2000-07-04 E. I. Dupont De Nemours & Company Process for the hydrolysis of adiponitrile and the production of nylon 6,6 utilizing low catalyst levels
US6103863A (en) * 1998-12-22 2000-08-15 E. I. Dupont De Nemours & Company Process for preparation of polyamide from dinitrile and diamine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6075117A (en) * 1998-12-21 2000-06-13 E.I. Dupont De Nemours & Company Process for the hydrolysis of adiponitrile and the production of nylon 6,6 using dicarboxylic acids as the sole catalyst
US6084056A (en) * 1998-12-22 2000-07-04 E. I. Dupont De Nemours & Company Process for the hydrolysis of adiponitrile and the production of nylon 6,6 utilizing low catalyst levels
US6103863A (en) * 1998-12-22 2000-08-15 E. I. Dupont De Nemours & Company Process for preparation of polyamide from dinitrile and diamine

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