JPS56147756A - Synthetic method of urea using silicon carbide material in apparatus - Google Patents

Synthetic method of urea using silicon carbide material in apparatus

Info

Publication number
JPS56147756A
JPS56147756A JP4864180A JP4864180A JPS56147756A JP S56147756 A JPS56147756 A JP S56147756A JP 4864180 A JP4864180 A JP 4864180A JP 4864180 A JP4864180 A JP 4864180A JP S56147756 A JPS56147756 A JP S56147756A
Authority
JP
Japan
Prior art keywords
silicon carbide
urea
carbide material
corrosion
cavitation
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.)
Pending
Application number
JP4864180A
Other languages
Japanese (ja)
Inventor
Morihisa Hidaki
Tateaki Deguchi
Keiichi Matsumoto
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.)
Mitsui Toatsu Chemicals Inc
Toyo Engineering Corp
Original Assignee
Mitsui Toatsu Chemicals Inc
Toyo Engineering Corp
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 Mitsui Toatsu Chemicals Inc, Toyo Engineering Corp filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP4864180A priority Critical patent/JPS56147756A/en
Priority to IN323/CAL/81A priority patent/IN155840B/en
Priority to NL8101499A priority patent/NL8101499A/en
Priority to GB8110277A priority patent/GB2073751B/en
Priority to DE19813114218 priority patent/DE3114218A1/en
Priority to IT21139/81A priority patent/IT1137354B/en
Priority to BR8102284A priority patent/BR8102284A/en
Priority to CA000375434A priority patent/CA1250314A/en
Priority to FR8107634A priority patent/FR2480280A1/en
Publication of JPS56147756A publication Critical patent/JPS56147756A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K25/00—Details relating to contact between valve members and seats
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/02—Apparatus characterised by being constructed of material selected for its chemically-resistant properties
    • 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
    • C07C273/04—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 from carbon dioxide and ammonia
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/02—Apparatus characterised by their chemically-resistant properties
    • B01J2219/0204—Apparatus characterised by their chemically-resistant properties comprising coatings on the surfaces in direct contact with the reactive components
    • B01J2219/0218—Apparatus characterised by their chemically-resistant properties comprising coatings on the surfaces in direct contact with the reactive components of ceramic

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Lift Valve (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Details Of Valves (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

PURPOSE: To synthesize urea through a highly stable method continuable for a long term regardless of the operating conditions, by using a silicon carbide material having corrosion and abrasion resistance in a part which is subject to corrosion, cavitation or erosion in an apparatus.
CONSTITUTION: A silicon carbide material, desirably a high-density one with a specific gravity ≥2.9, is used in a part which is subject to violent corrosion, cavitation, and erosion, e.g. a plug tip 4 and the inner surface 6 of a seat ring 5, in a reducing valve body 1 to synthesize urea. The silicon carbide material includes any of simple silicon carbide and a coated material prepared by coating the surface of a base material, e.g. a metal or ceramic, with silicon carbide by the coating technique, e.g. spraying or chemical deposition. The silicon carbide material can be used in all the parts to be in contact with a process fluid having strong corrosiveness at high temperature and pressure in the urea synthesizig process, and the change of valves is eliminated.
COPYRIGHT: (C)1981,JPO&Japio
JP4864180A 1980-04-15 1980-04-15 Synthetic method of urea using silicon carbide material in apparatus Pending JPS56147756A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP4864180A JPS56147756A (en) 1980-04-15 1980-04-15 Synthetic method of urea using silicon carbide material in apparatus
IN323/CAL/81A IN155840B (en) 1980-04-15 1981-03-25
NL8101499A NL8101499A (en) 1980-04-15 1981-03-26 METHOD FOR THE PREPARATION OF UREA.
GB8110277A GB2073751B (en) 1980-04-15 1981-04-01 Urea synthesis
DE19813114218 DE3114218A1 (en) 1980-04-15 1981-04-08 "METHOD FOR THE SYNTHETIC PRODUCTION OF UREA USING SILICON CARBIDE MATERIALS IN THE PLANT"
IT21139/81A IT1137354B (en) 1980-04-15 1981-04-14 PROCESS FOR THE SYNTHESIS OF UREA USING IN ITS EQUIPMENT SILICON CARBIDE-BASED MATERIALS
BR8102284A BR8102284A (en) 1980-04-15 1981-04-14 UREA SYNTHESIS PROCESS
CA000375434A CA1250314A (en) 1980-04-15 1981-04-14 Urea synthesizing process utilizing silicon carbide materials in its equipment
FR8107634A FR2480280A1 (en) 1980-04-15 1981-04-15 IMPROVEMENTS TO PROCESSES FOR SYNTHESIS OF UREA

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4864180A JPS56147756A (en) 1980-04-15 1980-04-15 Synthetic method of urea using silicon carbide material in apparatus

Publications (1)

Publication Number Publication Date
JPS56147756A true JPS56147756A (en) 1981-11-16

Family

ID=12808989

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4864180A Pending JPS56147756A (en) 1980-04-15 1980-04-15 Synthetic method of urea using silicon carbide material in apparatus

Country Status (9)

Country Link
JP (1) JPS56147756A (en)
BR (1) BR8102284A (en)
CA (1) CA1250314A (en)
DE (1) DE3114218A1 (en)
FR (1) FR2480280A1 (en)
GB (1) GB2073751B (en)
IN (1) IN155840B (en)
IT (1) IT1137354B (en)
NL (1) NL8101499A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06136516A (en) * 1992-02-26 1994-05-17 Toyo Eng Corp Reducing valve for urea synthesis plant

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110033018A1 (en) * 2009-08-10 2011-02-10 Caldera Engineering, Lc Method for bonding ceramic materials
US9446367B2 (en) 2014-08-15 2016-09-20 Rec Silicon Inc Joint design for segmented silicon carbide liner in a fluidized bed reactor
US9238211B1 (en) 2014-08-15 2016-01-19 Rec Silicon Inc Segmented silicon carbide liner
US9662628B2 (en) 2014-08-15 2017-05-30 Rec Silicon Inc Non-contaminating bonding material for segmented silicon carbide liner in a fluidized bed reactor
WO2023191620A1 (en) * 2022-03-28 2023-10-05 Stamicarbon B.V. Urea plant with valve; urea production process; use and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06136516A (en) * 1992-02-26 1994-05-17 Toyo Eng Corp Reducing valve for urea synthesis plant

Also Published As

Publication number Publication date
FR2480280A1 (en) 1981-10-16
FR2480280B1 (en) 1983-07-01
IT8121139A0 (en) 1981-04-14
IT1137354B (en) 1986-09-10
NL8101499A (en) 1981-11-02
GB2073751B (en) 1984-02-01
CA1250314A (en) 1989-02-21
GB2073751A (en) 1981-10-21
BR8102284A (en) 1981-12-01
DE3114218A1 (en) 1982-03-04
IN155840B (en) 1985-03-16

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