CN1223977A

CN1223977A - Method for copper-contg. ceramic coating of wall of catalytic reactor

Info

Publication number: CN1223977A
Application number: CN 98125746
Authority: CN
Inventors: 高林; 王国平; 赵伟忠
Original assignee: Xinjiang Technical Institute of Physics and Chemistry of CAS
Current assignee: Xinjiang Technical Institute of Physics and Chemistry of CAS
Priority date: 1998-12-16
Filing date: 1998-12-16
Publication date: 1999-07-28
Anticipated expiration: 2018-12-16
Also published as: CN1089319C

Abstract

A process for forming copper-containing ceramic coating on the wall of catalytic reactor includes such steps as pre-treating basic body, preparing glaze slip from basic components, cosolvent, binder, emulsifier, oxidant and multi-element adhering oxide, glazing, drying and firing. Its advantages are refractory nature up to 650 deg.C, thermal shock resistance of 300K temp difference, high adhesion to metal, high thermal expandability and elastic module similar to those of iron and low firing temp (850 deg.C).

Description

The cupric ceramic coating method of catalyzed reaction wall

The present invention relates to a kind of cupric ceramic coating method of catalyzed reaction wall

Lighter hydrocarbons petroleum gas transforms synthetic organic products, and except reasonable process conditions, the effect of catalyzer is very crucial.Can reaction be carried out, and reaction synthetic efficient height depends primarily on catalyzer.Particularly in the organic materials catalyzed reaction, relate to the reaction conditions and the reaction process of comparatively high temps mostly.Reactor for this class reaction, owing in reactor material is selected, contain the characteristic in the reactor material composition, make and react under the effect of organic materials certain element in the wall of reactor material, even have a large amount of carbon distributions to produce, because the generation of carbon distribution worsens some working conditions of reactor.In the reaction engineering device, holding catalyst be nickel austenite stainless steel.Studies show that according to use nickel has toxicity to catalyzer, increasing lives acts on and cupric oxide has catalyzer.The present invention is according to the work of catalytic theory and practice for this reason, so propose to be applied one deck ceramic membrane to containing the sickle stainless steel, screen is kept away the poisoning effect of nickel to catalyzer.To be applied in the ceramic layer simultaneously and be rich in cupric oxide, to increase catalyst function alive.Copper has good katalysis mechanism to organic hydrocarbon and carbon-carbon bond in addition.

The object of the invention is, a kind of cupric ceramic coating method that is used for the catalyzed reaction wall is provided, and this method is to adopt that matrix is prepared, glaze slip is made, be coated with glaze, drying, step such as burn till and finish; Each component during wherein glaze slip is made is base stock, solubility promoter, adhesive agent, opacifying agent, oxygenant, polynary adherence oxide compound.Obtained good effect by practice to this method, and have enamel coating can anti-high temperature below 650 ℃; The thermal shocking of the ability 300k temperature difference; Perfect metal adherence; Be bordering on the thermal expansivity and the Young's modulus of iron; Form 850 ℃ of temperature; The characteristics of double-deck time sintering enamel coating.

Catalyzed reaction wall of the present invention contain the coating process of potting porcelain, this method is to adopt that matrix is prepared, glaze slip is made, be coated with glaze, drying, step such as burn till and finish; Each component during wherein glaze slip is made is base stock, solubility promoter, adhesive agent, opacifying agent, oxygenant, polynary adherence oxide compound; Base stock is agalmatolite, potassium felspar sand, dickite; Solubility promoter is a rhombspar; Adhesive agent, oxygenant are cupric oxide, titania mixture; Opacifying agent is fluorite, sodium hexafluorisilicate; Polynary adherence oxide compound is Cadmium oxide, vanadium oxide, zirconium white, zinc oxide mixture; The each component proportioning is (weight percent): face porcelain wherein: potassium felspar sand 12-25, agalmatolite 15-30, dickite 26-14, sodium hexafluorisilicate 12-25, rhombspar 12-1, adhesive agent, oxygenant 10-18; End porcelain is: potassium felspar sand 14-28, agalmatolite 12-30, dickite 30-15, fluorite 12-25, rhombspar 14-1, polynary adherence oxide compound 2-15.On the make at first the matrix preparation is to adopt mechanical grinding steel pipe firecoat, uses the washing composition oil removing, gets final product with 60% sulphur pickling blister grease removal, washing, yellow soda ash washing neutralization, washing, drying then.It is that various components are crossed 120 mesh sieves respectively that glaze slip is made, mix after 60 mesh sieves, 1250 ℃ fuse, shrend, be crushed to 120 orders then, outer Canadian dollar and bentonite gel and water liquid ball milling, colloidal mill is regulated viscosity and promptly being made glaze slip with detection again.Being coated with glaze, drying, burning till step is that face porcelain, end porcelain are coated with dry cover-coat enamel, the ground-coat enamel of forming of twice glaze slip, and ground-coat enamel burns till in 850 ℃ then, and the time is 3-5 minute; Cover-coat enamel burns till in 820 ℃, and the time is to get final product in 3-5 minute.

Embodiment 1 (weight percent)

At first matrix is prepared; Adopt mechanical grinding steel pipe firecoat, use the washing composition oil removing, then with 60% sulphur pickling blister grease removal, washing, yellow soda ash washing neutralization, washing, dry getting final product.Glaze slip is made then: the face porcelain is potassium felspar sand 12%, agalmatolite 30%, dickite 14%, sodium hexafluorisilicate 25%, rhombspar 1%, cupric oxide 9%, titanium oxide 9%; End porcelain is: potassium felspar sand 14%, agalmatolite 30%, dickite 15%, fluorite 25%, rhombspar 1%, polynary adherence oxide compound are Cadmium oxide 4%, vanadium oxide 2%, zirconium white 5%, zinc oxide 4%, various components are crossed 120 mesh sieves respectively, mix after 60 mesh sieves, 1250 ℃ fuse, shrend, be crushed to 120 orders then, outer Canadian dollar and bentonite gel and water liquid ball milling, colloidal mill is regulated viscosity and is promptly made glaze slip with detection again.To make the steel pipe of ready-made glaze slip after to polishing then and carry out twice porcelain and end porcelain respectively and be coated with glaze, dry cover-coat enamel and the ground-coat enamel of forming, and carry out sintering again, ground-coat enamel burns till in 850 ℃, and the time is 3-5 minute; Cover-coat enamel burns till in 820 ℃, and the time is to get final product in 3-5 minute.

Embodiment 2 (weight percent)

At first matrix is prepared: adopt mechanical grinding steel pipe firecoat, use the washing composition oil removing, then with 60% sulphur pickling blister grease removal, washing, yellow soda ash washing neutralization, washing, dry getting final product.Glaze slip is made then: the face porcelain is potassium felspar sand 25%, agalmatolite 15%, dickite 26%, sodium hexafluorisilicate 12%, rhombspar 12%, cupric oxide 5%, titanium oxide 5%; End porcelain is: potassium felspar sand 28%, agalmatolite 12%, dickite 30%, fluorite 12%, rhombspar 14%, polynary adherence oxide compound are Cadmium oxide 0.5%, vanadium oxide 0.5%, zirconium white 0.5%, zinc oxide 0.5%, various components are crossed 120 mesh sieves respectively, mix after 60 mesh sieves, 1250 ℃ fuse, shrend, be crushed to 120 orders then, outer Canadian dollar and bentonite gel and water liquid ball milling, colloidal mill is regulated viscosity and is promptly made glaze slip with detection again.To make the steel pipe of ready-made glaze slip after to polishing then and carry out twice porcelain and end porcelain respectively and be coated with glaze, dry cover-coat enamel and the ground-coat enamel of forming, and carry out sintering again, ground-coat enamel burns till in 850 ℃, and the time is 3-5 minute; Cover-coat enamel burns till in 820 ℃, and the time is to get final product in 3-5 minute.

Claims

1, a kind of cupric ceramic coating method that is used for the catalyzed reaction wall is characterized in that, this method is to adopt that matrix is prepared, glaze slip is made, be coated with glaze, drying, step such as burn till and finish; Each component during wherein glaze slip is made is base stock, solubility promoter, adhesive agent, opacifying agent, oxygenant, polynary adherence oxide compound; Base stock is agalmatolite, potassium felspar sand, dickite; Solubility promoter is a rhombspar; Adhesive agent, oxygenant are cupric oxide, titania mixture; Opacifying agent is fluorite, sodium hexafluorisilicate; Polynary adherence oxide compound is Cadmium oxide, vanadium oxide, zirconium white, zinc oxide mixture; The each component proportioning is (weight percent): face porcelain wherein: potassium felspar sand 12-25, agalmatolite 15-30, dickite 26-14, sodium hexafluorisilicate 12-25, rhombspar 12-1, adhesive agent, oxygenant 10-18; End porcelain is: potassium felspar sand 14-28, agalmatolite 12-30, dickite 30-15, fluorite 12-25, rhombspar 14-1, polynary adherence oxide compound 2-15.

2, the preparation method of the cupric ceramic coating method of catalyzed reaction wall according to claim 1, it is characterized in that, it is to adopt mechanical grinding steel pipe firecoat that matrix is prepared, use the washing composition oil removing, then with 60% sulphur pickling blister grease removal, washing, yellow soda ash washing neutralization, washing, dry getting final product.

3, the preparation method of the cupric ceramic coating method of catalyzed reaction wall according to claim 1, it is characterized in that, it is that various components are crossed 120 mesh sieves respectively that glaze slip is made, mix after 60 mesh sieves, 1250 ℃ fuse, shrend, be crushed to 120 orders then, outer Canadian dollar and bentonite gel and water liquid ball milling, colloidal mill is regulated viscosity and is promptly made glaze slip with detection again.

4, the preparation method of the cupric ceramic coating method of catalyzed reaction wall according to claim 1, it is characterized in that, being coated with glaze, drying, burning till step is that face porcelain, end porcelain are coated with dry cover-coat enamel, the ground-coat enamel of forming of twice glaze slip, and ground-coat enamel burns till in 850 ℃ then, and the time is 3-5 minute; Cover-coat enamel burns till in 820 ℃, and the time is to get final product in 3-5 minute.