FR2480280A1 - Perfectionnements aux procedes pour la synthese de l'uree - Google Patents

Perfectionnements aux procedes pour la synthese de l'uree Download PDF

Info

Publication number
FR2480280A1
FR2480280A1 FR8107634A FR8107634A FR2480280A1 FR 2480280 A1 FR2480280 A1 FR 2480280A1 FR 8107634 A FR8107634 A FR 8107634A FR 8107634 A FR8107634 A FR 8107634A FR 2480280 A1 FR2480280 A1 FR 2480280A1
Authority
FR
France
Prior art keywords
synthesis
silicon carbide
urea
corrosion
materials
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.)
Granted
Application number
FR8107634A
Other languages
English (en)
French (fr)
Other versions
FR2480280B1 (cs
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.)
Toyo Engineering Corp
Original Assignee
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 Toyo Engineering Corp filed Critical Toyo Engineering Corp
Publication of FR2480280A1 publication Critical patent/FR2480280A1/fr
Application granted granted Critical
Publication of FR2480280B1 publication Critical patent/FR2480280B1/fr
Granted 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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Lift Valve (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Details Of Valves (AREA)
FR8107634A 1980-04-15 1981-04-15 Perfectionnements aux procedes pour la synthese de l'uree Granted FR2480280A1 (fr)

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 (2)

Publication Number Publication Date
FR2480280A1 true FR2480280A1 (fr) 1981-10-16
FR2480280B1 FR2480280B1 (cs) 1983-07-01

Family

ID=12808989

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8107634A Granted FR2480280A1 (fr) 1980-04-15 1981-04-15 Perfectionnements aux procedes pour la synthese de l'uree

Country Status (9)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2608234B2 (ja) * 1992-02-26 1997-05-07 東洋エンジニアリング株式会社 尿素合成プラント用減圧弁
US20110033018A1 (en) * 2009-08-10 2011-02-10 Caldera Engineering, Lc Method for bonding ceramic materials
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
US9446367B2 (en) 2014-08-15 2016-09-20 Rec Silicon Inc Joint design for segmented silicon carbide liner in a fluidized bed reactor
EP4436703B1 (en) * 2022-03-28 2025-07-16 Stamicarbon B.V. Urea plant with valve; urea production process; use and method

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CA1973 *
CA1974 *
CA1980 *

Also Published As

Publication number Publication date
BR8102284A (pt) 1981-12-01
GB2073751A (en) 1981-10-21
IN155840B (cs) 1985-03-16
IT1137354B (it) 1986-09-10
DE3114218A1 (de) 1982-03-04
NL8101499A (nl) 1981-11-02
JPS56147756A (en) 1981-11-16
GB2073751B (en) 1984-02-01
CA1250314A (en) 1989-02-21
IT8121139A0 (it) 1981-04-14
FR2480280B1 (cs) 1983-07-01

Similar Documents

Publication Publication Date Title
US5833838A (en) Cracking processes
US20060065635A1 (en) Deposition chamber surface enhancement and resulting deposition chambers
AU2011331909B2 (en) Surface treatment of metal objects
FR2992331A1 (fr) Alliage de zirconium comportant une couche de revetement contenant une couche mixte formee sur une surface et son procede de preparation
FR2472035A1 (fr) Procede pour traiter a temperature elevee des matieres contenant un hydrocarbure afin d'eviter des depots de carbone a la surface des reacteurs
CN102405307A (zh) 工厂操作方法和工厂操作系统
FR2480280A1 (fr) Perfectionnements aux procedes pour la synthese de l'uree
Nolan et al. Chemically enhanced synergistic wear: a copper chemical mechanical polishing case study
FR2604188A1 (fr) Element tubulaire en acier inoxydable presentant une resistance a l'usure amelioree
EP0010484A1 (fr) Perfectionnement dans la chromisation des aciers par voie gazeuse
Hertweck et al. Applicability of metals as liner materials for ammonoacidic crystal growth
EP3431186B1 (en) Cold spray nozzle
US7147823B2 (en) High temperature cooling system and method
WO1986000345A1 (fr) Procede de realisation de revetements de carbures de bore et revetements obtenus
Hermse et al. Metal dusting: relationship between alloy composition and degradation rate
KR20210139311A (ko) 금속성 코팅을 갖는 터보기계 구성요소
Gozhenko et al. Damage to the heat exchange surface of steam generator PGV-1000
JPH11230365A (ja) 摺動材
Halverson et al. Plasma assisted chemical vapor deposition on ‘‘three‐dimensional’’substrates
CH635869A5 (fr) Alliage a base de nickel.
JP2608234B2 (ja) 尿素合成プラント用減圧弁
JPS60206567A (ja) 耐食・耐摩耗性肉盛層の形成方法
FR2527226A1 (fr) Procede de revetement en phase gazeuse de petits orifices menages dans des pieces en aciers
Prenzlow High temperature oxidation of alumina forming cast austenitic stainless steels within an environment of pure steam
CAZACU Modifying the Structure and Surface Properties of Ti6Al4V Alloy by Carbonitriding in Fluidized Bed

Legal Events

Date Code Title Description
ST Notification of lapse