Abstract: The invention relates to textile surface structures containing A) 20 to 90 wt % melamine fibres A), and B) 10 to 80 wt % flameproof polyester fibres B).

Abstract: The invention relates to a thread for producing fabric, containing a) 5 to 90 wt. % of melamine fibres, b) 5 to 90 wt. % of natural fibres, and c) 0.1 to 30 wt. % of polyamide fibres consisting of polyamide 66, polyamide 6 or mixtures thereof.

Abstract: The present invention relates to flame-proof fabrics based on melamine resin fibers, fire-safety blankets and clothing manufactured therefrom and their use for extinguishing fires and for protecting persons and objects from fire, combustion products and/or extinguishants.

Abstract: The present invention relates to flameproof fabrics based on melarnine resin fibres, fireproof blankets and clothing made therewith and their use for extinguishing fires and protecting people and objects from fire, combustion products and/or extinguishing agents.

Abstract: A fiber blend of(a) from 10 to 90 parts by weight of metal-coated melamine resin fibers or a blend of uncoated and metal-coated resin fibers and(b) from 90 to 10 parts by weight of natural fibers and wovens, nonwovens, yarns, tapes or moldings formed from the blend.

Abstract: Catalysts of the formula I?A.sub.a B.sub.b O.sub.x !.sub.p ?C.sub.c D.sub.d Fe.sub.e Co.sub.f E.sub.i F.sub.j O.sub.y !.sub.q I,whereA is bismuth, tellurium, antimony, tin and/or copper,B is molybdenum and/or tungsten,C is an alkali metal, thallium and/or samarium,D is an alkaline earth metal, nickel, copper, cobalt, manganese, zinc, tin, cerium, chromium, cadmium, molybdenum, bismuth and/or mercury,E is phosphorus, arsenic, boron and/or antimony,F is a rare-earth metal, vanadium and/or uranium,a is from 0.01 to 8,b is from 0.1 to 30,c is from 0 to 4,d is from 0 to 20,e is from 0 to 20,f is from 0 to 20,i is from 0 to 6,j is from 0 to 15,x and y are numbers determined by the valency and frequency of the elements other than oxygen in I, and p and q are numbers whose ratio p/q is in the range from 0.001 to 0.

Abstract: A process for regenerating deactivated metal oxide catalysts comprising at least one of the elements antimony, iron, bismuth, molybdenum, vanadium, tungsten and/or uranium and a peptizable carrier, comprises the steps of:a) grinding the metal oxide catalyst in the presence of water to a particle size of from 10 nm to 10 .mu.m,b) heating the aqueous suspension of the metal oxide catalyst of stage a) to 30-100.degree. C. and adding an acid which peptizes the carrier,c) spray drying the acidic suspension of the metal oxide catalyst,d) heating the fluidizable metal oxide catalyst particles of stage c) to 500.degree.-850.degree. C.

Abstract: Acrylonitrile is prepared by a process which comprises the ammoxidation of propylene with ammonia and molecular oxygen or a gas containing molecular oxygen at from 300.degree. to 600.degree. C. in the presence of a metal oxide catalyst which contains tellurium and one or more of the metals iron, molybdenum and antimony, in a fluidized bed, with regeneration of the catalyst during the reaction by the addition of oxidic tellurium compounds or tellurium compounds which form oxidic tellurium compounds under the reaction conditions, in dissolved or suspended form.

Abstract: A molded supported catalyst which contains from 2 to 13% by weight of copper ions in the form of copper(II) chloride and/or copper oxychloride and from 0.2 to 3% by weight of alkali metal ion on a columnar carrier and has a diameter of from 4 to 7 mm and a height which is from 0.35 to 0.75 times the diameter is particularly suitable for preparing 1,2-dichloroethane by oxychlorination of ethylene.

Abstract: 1,2-Dichloroethane is prepared by oxychlorination of ethylene in the presence of a catalyst which contains, on a conventional carrier, copper(II) chloride in a concentration such that the amount of copper ions is from 1 to 20% by weight, based on the total weight of the catalyst, by a process in which the catalyst is obtained by impregnating the carrier with an aqueous solution which contains copper(II) chloride and hydrogen chloride in amounts such that the weight ratio of copper ions to hydrogen chloride is from 13:1 to 130:1.