公开(公告)号：JPH11292532A

公开(公告)日：1999-10-26

申请号：JP6393399

申请日：1999-03-10

Applicant: DEGUSSA

Inventor： VON HIPPEL LUKAS DR ,  ARNTZ DIETRICH DR ,  VANHEERTUM RUDOLF DR ,  SAUER MANFRED DR ,  KUTTRUF BERND

IPC: C01C3/02

Abstract: PROBLEM TO BE SOLVED: To improve the use of energy by using a catalyst at a high temp. for the reaction of methane as the source gas with ammonia and oxygen to produce hydrogen cyanide, hydrogen and water by self-heating method. SOLUTION: In a reciprocal counterflow type reactor comprising alumina ceramic coaxial two tubes, a platinum-based catalyst 3 disposed on the upper end of the inner tube 1 is preliminarily heated to >=800 deg.C. Methane as the source gas, ammonia and oxygen by 1/2 to 3/2 mol to 1 mol of the hydrogen cyanide to be produced, or air are preliminarily heated to >=800 deg.C and introduced through the lower end of the inner tube 1 to cause the reaction of CH4 + NH4 +1/202 →HCN+H2 O+2H2 at >=1000 deg.C. In This reaction, an excess amt. of oxygen is supplied to compensate the thermal loss. The produced gas mixture passed through the catalyst 3 is changed its direction through the annular intermediate space between the inner tube and the outer tube 2 to descend and then collected. The source gas mixture is heated by self-heating method by heat exchange with the counter flow. The entrance and the exit of the reactor are kept at a low temp. as

公开(公告)号：JPH11236214A

公开(公告)日：1999-08-31

申请号：JP34840598

申请日：1998-12-08

Applicant: DEGUSSA

Inventor： HIPPEL LUKAS VON DR ,  GUTSCH ANDREAS DR ,  SCHAFFER ROLAND ,  SAUER MANFRED DR ,  VANHEERTUM RUDOLF DR

IPC: C01C3/02

Abstract: PROBLEM TO BE SOLVED: To provide a producing method of prussic acid by which the reaction is carried out substantially at a low temp. and is started without a catalyst and which is suitable for the production of a small amt. of prussic acid. SOLUTION: When prussic acid is produced by the gas phase reaction of methane and ammonia at a elevated temp. in >1 ratio of ammonia/methane, the reaction gas mixture is heated to 500 to 1000 deg.C and subjected to corona discharge. The space velocity and the discharge current are preferably controlled in such a manner that charges of 0.02 to 100 coulomb per 1 mol of methane are passed through the reaction gas mixture. By stopping the corona discharge, preparation of prussic acid can be instantly terminated. Also, just after the electric discharge is turned on, the preparation of prussic acid starts at once.

公开(公告)号：JPH10310424A

公开(公告)日：1998-11-24

申请号：JP2078098

申请日：1998-02-02

Applicant: DEGUSSA

Inventor： SCHUETTE RUEDIGER DR ,  ALT CHRISTIAN HANS ,  BECKER-BALFANZ CATRIN ,  SAUER MANFRED DR ,  HIPPEL LUKAS VON DR ,  FEUER OLIVER ,  LOROESCH JUERGEN DR

IPC: C01C3/08 ,  C01C3/10

Abstract: PROBLEM TO BE SOLVED: To obtain the granule of high-purity alkali (earth) metal cyanide by spraying an aq. soln. or suspension of an alkali (earth) metal hydroxide into a reactor, allowing the soln. or suspension to react with gaseous hydrogen cyanide and vaporizing the water introduced into the reactor and generated. SOLUTION: The reaction consists in the spray granulation in a fluidized bed kept at 100-250 deg.C. Hydrogen cyanide is introduced at 120-400 deg.C along with a fluidization gas (e.g. nitrogen). The molar ratio of the hydrogen cyanide to the alkali (earth) hydroxide equivalent is controlled to 1-5. For example, the BMA- or the reacting gas from the Shawingan's process contg. hydrogen contg. hydrogen cyanide and hydrogen as the main components is used or the reacting gas from the Andrussow's process contg. hydrogen cyanide, N2 , H2 , H2 O and CO as the main components is used. The concn. of the alkali metal metal soln. to be sprayed is controlled to 10-70 wt.%.

公开(公告)号：JPH11236215A

公开(公告)日：1999-08-31

申请号：JP34868998

申请日：1998-12-08

Applicant: DEGUSSA

Inventor： HIPPEL LUKAS VON DR ,  ARNTZ DIETRICH DR ,  SAUER MANFRED DR ,  VANHEERTUM RUDOLF DR

IPC: C01C3/02

Abstract: PROBLEM TO BE SOLVED: To preferably control the exothermic reaction and to easily assemble into a large-size device by using the reaction heat generated in the reaction to heat the starting gas to the required reaction temp. by indirect heat exchange based on the countercurrent principle. SOLUTION: As for the reactor, a reversal countercurrent reactor consisting of two concentric tubes comprising a tightly sintered aluminum oxide ceramic material is used. The inner tube 1 is equipped with a catalyst bed 3 at the upper end part, while the outer tube 2 is closed at the top end, namely, the top of the reactor. When the starting gas mixture is introduced from the lower side to the inner tube 1, the mixture passes through the catalyst bed 3 and turns downward in the ringlike space between the inner tube 1 and the outer tube 2. At the initiation of the reaction, it is necessary to heat the starting gas mixture and the catalyst to >=800 deg.C. This heating process is carried out by direct heating of the catalyst by a heater jacket or a current surrounding the outer tube 2. After the reaction is initiated, it is enough to use the generated reaction heat to heat the starting gas mixture to the reaction temp.

公开(公告)号：JPH10259177A

公开(公告)日：1998-09-29

申请号：JP31172397

申请日：1997-11-13

Applicant: DEGUSSA

Inventor： HIPPEL LUKAS VON DR ,  SAUER JOERG DR ,  SCHUETTE RUEDIGER DR ,  SAUER MANFRED DR ,  ARNTZ DIETRICH

IPC: C07D213/84 ,  B01J29/26 ,  C01B17/74 ,  C01C3/02 ,  C07B43/08 ,  C07B61/00 ,  C07C253/24 ,  C07C255/01 ,  C07D213/54

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a cyano compound by such an ammoxidation reaction as enabling to use one or more other ammonia sources instead of gaseous ammonia. SOLUTION: This method for producing a cyano compound comprises subjecting a cyano compound of the formula: R-CN (R is H or an organic group) as an ammoxidizable organic compound to an ammoxidation reaction with an ammonium salt as an ammonia source and with an oxygen source in the presence of an ammoxidation catalyst at a temperature of 100-700 deg.C. The employment of the solution of the ammonium salt enables improved fine dispersion, in its turn, improved contact, and gives the cyano compound of ammoxidation product in an enhanced yield.

公开(公告)号：JPH1052645A

公开(公告)日：1998-02-24

申请号：JP10853297

申请日：1997-04-25

Applicant: DEGUSSA

Inventor： HIPPEL LUKAS VON DR ,  BUSSEK CHRISTIAN DR ,  SAUER JOERG DR ,  SAUER MANFRED DR ,  ARNTZ DIETRICH DR

IPC: B01J23/40 ,  B01J23/42 ,  B01J27/24 ,  B01J37/02 ,  C01C3/02

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a coating with catalytic action for synthesis of hydrogen cyanide on a molding. SOLUTION: In a method for manufacturing a coating with catalytic action, a molding is uniformly moistened with a coating dispersion liquid containing at least, one type of particulate platinum group element and any other coating component in a carrier liquid. In addition, the carrier liquid is evaporated and the coating is gradually heated at 1000-1350 deg.C in the presence of nitrogen and/or ammonium, so that the coating is shifted to a catalytic action effective state. In this case, a particulate nitride which has an average particle diameter considerably less than 100μm and contains elements such as aluminum, boron, titanium and silicon is used alone or in mixture form as another cationic coating component.

公开(公告)号：CZ28998A3

公开(公告)日：1998-08-12

申请号：CZ28998

申请日：1998-01-30

Applicant: DEGUSSA

Inventor： SCHUTTE RUDIGER DR ,  ALT HANS CHRISTIAN ,  BECKER-BALFANZ CATRIN ,  SAUER MANFRED DR ,  VON HIPPEL LUKAS DR ,  FEUER OLIVER ,  LOROSCH JURGEN DR

IPC: C01C3/08 ,  C01C3/10 ,  B01J2/04

Abstract: Preparation of alkali or alkaline earth metal cyanide granules involves spraying an aqueous alkali metal hydroxide solution or an aqueous alkaline earth metal hydroxide suspension onto a fluidised product seed bed at 100-250 degrees C in a fluidised bed spray granulation reactor which is supplied with a hydrogen cyanide-containing gas in amount ≥ 1 mol HCN per metal equivalent, the introduced and formed water being evaporated by the fluidising gas supplied at 110-500 degrees C. Also claimed are sodium or potassium cyanide granules having a spherical particle shape with a smooth or raspberry-like surface structure, 0.1-20 mm particle diameter for 99 wt.% of the granules, ≥ 600 g/dm bulk density, less than 1 wt.% wear measured by the roller wear test (Erwaka TAR wear tester, 20 g sample, 60 minutes, 20 rpm.) and a clumping index of NOTGREATER 4 (measured by 14 day 10g load application onto a 100 g sample in a 5.5 cm inside diameter cylinder), the novelty being that the alkali metal carbonate content is less than 0.5 wt.% and the alkali metal formate content is less than 0.3 wt.%, the alkali metal in these by-products being the same as that in the cyanide. Preferably, the total alkali metal carbonate and alkali metal formate content is less than 0.4 wt.% and the granules are prepared by the above process using reaction gas from a BMA process and superheated steam as fluidising gas.

公开(公告)号：DE19754989A1

公开(公告)日：1999-07-01

申请号：DE19754989

申请日：1997-12-11

Applicant: DEGUSSA

Inventor： HIPPEL LUCAS VON DR ,  GUTSCH ANDREAS DR ,  SCHAFFER ROLAND ,  SAUER MANFRED DR ,  VANHEERTUM RUDOLF DR

IPC: B01J19/08 ,  C07C45/00 ,  C07C47/052 ,  B01J19/12

Abstract: A process for the production of formaldehyde by dehydration of methanol comprises heating methanol vapor to 100-500 deg C and passing it through a corona discharge.

公开(公告)号：DE19754988A1

公开(公告)日：1999-06-17

申请号：DE19754988

申请日：1997-12-11

Applicant: DEGUSSA

Inventor： HIPPEL LUKAS VON DR ,  SAUER MANFRED DR ,  ARNTZ DIETRICH DR ,  VANHEERTUM RUDOLF DR

IPC: C01C3/02

公开(公告)号：DE19754982A1

公开(公告)日：1999-06-17

申请号：DE19754982

申请日：1997-12-11

Applicant: DEGUSSA

Inventor： HIPPEL LUCAS VON DR ,  GUTSCH ANDREAS DR ,  SCHAFFER ROLAND ,  SAUER MANFRED DR ,  VANHEERTUM RUDOLF DR

IPC: C01C3/02