I.　Process　Introduction

This　process　takes　industrial　boric　acid　as　raw　material.　First　prepare　metaboric　acid,　then　further　dehydrate　it　under　static,　negative　pressure　or　dynamic　atmospheric　condition　to　change　into　diboron　trioxide　particles,　then　produce　finished　product　through　packaging.

II.　Technical　Advancement

The　presently　domestic　popular　process　is　atmospheric　dehydrating　process.　The　process　procedures　include:　metaboric　acid　preparation,　fusion,　spinning　or　back　cutting,　pulverizing,　screening　and　packaging.　This　technology　has　complicated　processes,　high　production　cost　and　low　yield.　Product　quality　cannot　be　guaranteed.　

This　process　enables　boric　acid　to　be　dehydrated　under　static　negative　pressure　or　dynamic　atmospheric　conditions　and　produces　diboron　trioxide,　opening　up　one　new　path　for　the　production　of　diboron　trioxide.　This　process　is　featured　by　simple　flow,　little　equipment　investment,　easy　operation,　low　dehydrating　temperature,　little　energy　consumption,　product　free　of　pulverization　and　good　quality,　belonging　to　updating　technology　for　boron　anhydride　production.

III.　Market　Prospect

Diboron　trioxide　is　used　as　flux　during　silicate　decomposition,　doping　agent　of　semiconductor　material,　fire-resistant　addictive　of　heat　resisting　glass　utensils　and　paint,　and　raw　material　for　manufacturing　element　boron　and　various　boron　compounds;　in　metallurgy　industry,　it　is　used　in　alloy　steel　production　and　used　as　catalyst　of　organic　synthesis,　addictive　of　high-temperature　lubricating　oil　and　various　chemical　reagent.　The　market　prospect　is　considerable.

IV.　Technical　Sources

Autonomous　research　and　development,　and　industrialization　has　been　realized.

V.　Product　Quality

Indicator　Name	Indicator/%	Indicator　Name	Indicator/%
B2O3	98-99.6	Fe2O3	≤0.015
SiO2	≤0.01	CaO	≤0.005
Na	≤0.1	Al2O3	≤0.0002

VI.　Investment　Scale

According　to　annual　production　of　600t　diboron　trioxide,　equipment　investment　is　900,000　Yuan.　The　scale　can　be　determined　according　to　the　actual　situation.

VII.　Environmental　Protection　

No　“three　wastes”　discharge.

VII.　Environmental　Protection　

No　“three　wastes”　discharge.

IX.　Form　of　Cooperation

Technical　transfer.　Taking　responsibility　for　process　flow　design,　supporting　equipment　of　standard　equipment,　non-standard　equipment　manufacture　design,　equipment is　plane　layout　design,　equipment　installation　design,　pipe　network　design,　equipment　installation　guidance,　equipment　commissioning,　production　commissioning,　training　for　production　engineers,　analysis　staff　and　technicians,　process　operation　specifications,　raw　material　and　product　analysis　method,　and　preparation　of　intermediate　control　analysis　method;　ensuring　output,　yield　and　quality　to　reach　the　standard;　and　undertaking　turn-key　projects.