GB1235055A - Process for drying urea solutions - Google Patents

Process for drying urea solutions

Info

Publication number
GB1235055A
GB1235055A GB5355769A GB5355769A GB1235055A GB 1235055 A GB1235055 A GB 1235055A GB 5355769 A GB5355769 A GB 5355769A GB 5355769 A GB5355769 A GB 5355769A GB 1235055 A GB1235055 A GB 1235055A
Authority
GB
United Kingdom
Prior art keywords
urea
heated
solution
tubes
water
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.)
Expired
Application number
GB5355769A
Inventor
John Lewis Graumann
Alfred Napoleon Major
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Whitlock Manufacturing Co
Original Assignee
Whitlock Manufacturing Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Whitlock Manufacturing Co filed Critical Whitlock Manufacturing Co
Priority to GB5355769A priority Critical patent/GB1235055A/en
Publication of GB1235055A publication Critical patent/GB1235055A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
    • C07C273/14—Separation; Purification; Stabilisation; Use of additives
    • C07C273/16—Separation; Purification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,235,055. Evaporators, film type; removal of water from urea solutions. WHITLOCK MFG., CO. 31 Oct., 1969, No. 53557/69. Addition 1,193,221. Heading B1B. [Also in Division C2] In a process for drying an aqueous solution of urea, as claimed in parent Specification, wherein the solution is passed in film-form down the interior surface of vertically-disposed heated tubes and then flows downwardly through packing while a stream of heated inert gas, e.g. air, is passed upwardly through the packing and the tubes, the temperature range for heating the stream of inert gas is extended from 310‹ to 350‹F., and the temperature range to which the urea solution is heated is extended below 280‹ to 260‹F. In an example, a solution of urea containing 31% water is dried by passing it through tubes heated by steam at 295.6‹F., and introducing air at 340‹F into the apparatus. The urea discharged from the apparatus has a temperature of 279‹F and contains 0.29% water.
GB5355769A 1967-01-20 1969-10-31 Process for drying urea solutions Expired GB1235055A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5355769A GB1235055A (en) 1967-01-20 1969-10-31 Process for drying urea solutions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61057267A 1967-01-20 1967-01-20
GB5355769A GB1235055A (en) 1967-01-20 1969-10-31 Process for drying urea solutions

Publications (1)

Publication Number Publication Date
GB1235055A true GB1235055A (en) 1971-06-09

Family

ID=26267288

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5355769A Expired GB1235055A (en) 1967-01-20 1969-10-31 Process for drying urea solutions

Country Status (1)

Country Link
GB (1) GB1235055A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002425A1 (en) * 1979-05-01 1980-11-13 Toyo Engineering Corp Process for concentrating aqueous urea solution

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002425A1 (en) * 1979-05-01 1980-11-13 Toyo Engineering Corp Process for concentrating aqueous urea solution

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee