Abstract

The invention provides an olefin-olefinic alcohol copolymer and a preparation method thereof, said copolymer comprising a spherical and/or spherical-like polymer. The copolymer provided by the invention exhibits a good morphology and has good prospects in industrial use.

IPC Classes  ?

• C08L 23/08 - Copolymers of ethene
• C08F 210/02 - Ethene
• C08F 216/08 - Allyl alcohol
• C08F 2/38 - Polymerisation using regulators, e.g. chain terminating agents
• C08F 2/06 - Organic solvent
• C08F 4/70 - Iron group metals, platinum group metals, or compounds thereof
• C08F 4/14 - Boron halides or aluminium halidesComplexes thereof with organic compounds containing oxygen
• C08F 216/06 - Polyvinyl alcohol

Abstract

The present invention refers to a flame retardant comprising a complex formed by phosphine oxide and transition metal salt, wherein has good flame retardant property. The present invention also refers to a composite flame retardant and flame retardant antistatic composition. The present invention also further refers to a flame resistant method, which adds the abovementioned flame retardant, composite flame retardant or flame retardant antistatic composition into the material, so that said material has flame retardance or flame retardance and antistatic, and has excellent mechanical properties.

IPC Classes  ?

• C08J 9/00 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof
• C08K 5/52 - Phosphorus bound to oxygen bound to oxygen only
• C09K 21/12 - Organic materials containing phosphorus
• D01F 9/15 - Carbon filamentsApparatus specially adapted for the manufacture thereof by decomposition of organic filaments from pitch or distillation residues from coal pitch
• C09K 21/02 - Inorganic materials
• C09K 21/04 - Inorganic materials containing phosphorus
• C08J 9/12 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
• C08L 23/12 - Polypropene
• C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers
• C09K 3/32 - Materials not provided for elsewhere for treating liquid pollutants, e.g. oil, gasoline or fat
• C08K 3/017 - Antistatic agents
• C08K 5/00 - Use of organic ingredients
• C08K 3/04 - Carbon
• C08K 3/32 - Phosphorus-containing compounds

Abstract

An ethylene cracking furnace with multipass radiant furnace tubes comprises at least a radiant section, a bottom burner and/or a side wall burner being arranged in the radiant section, and at least one set of multipass radiant furnace tubes being arranged longitudinally in the radiant section. The multipass radiant furnace tubes are four to ten rows of radiant tubes and at least one row of furnace tube thereof, does not neighbor another connecting one in space. By means of this arrangement, the influence of thermal radiant among high temperature tube rows can be reduced and the tubes with low wall temperature can absorb radiant heat from the tubes with high wall temperature, which is advantageous to reduce the surface temperature of furnace tube with a high temperature and to achieve the object of prolonging operating period of cracking furnace and service lifetime of radiant tubes.

IPC Classes  ?

• C10G 9/20 - Tube furnaces
• C07C 11/04 - Ethene
• C07C 4/02 - Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by cracking a single hydrocarbon or a mixture of individually defined hydrocarbons or a normally gaseous hydrocarbon fraction