I.　Technical　Background:　

At　present,　when　preparing　boric　acid　with　industrial　borax,　nitric　acid　process　and　sulfuric　acid　process　are　commonly　used　in　China.　Nanyang　Pengmei　Industrial　Technology　Research　Institute　developed　the　production　technology　of　using　sulfuric　acid　to　dispose　borax　ore　and　directly　prepare　boric　acid　in　2008　and　smoothly　accomplished　industrialization　in　2009.　However,　nitric　acid　borax　process,　sulfuric　acid　borax　process,　and　boric　acid　preparation　process　of　disposing　borax　ore　with　sulfuric　acid　need　to　evaporate　mother　liquid.　While　ensuring　the　yield,　produce　by-product　-　sodium　nitrate　or　sodium　sulfate,　so　energy　consumption　in　the　production　process　is　relatively　high.　Individual　enterprises　do　not　evaporate　mother　liquid　but　partially　discharge　mother　liquid,　thus　resulting　in　serious　loss　of　boron,　and　the　yield　level　is　below　70%.　If　boric　acid　is　produced　with　28%　grade　borax　ore,　ore　consumption　per　ton　is　more　than　2,700kg.

II.　Features　of　this　Process:　

Using　sulfuric　acid　to　dispose　borax　ore　or　industrial　borax　and　prepare　industrial　boric　acid　by-product　sodium　sulfate　is　featured　by　free　of　evaporation　and　concentration,　little　equipment　investment,　low　energy　consumption,　good　boric　acid　product　quality,　low　production　cost　and　significant　economic　benefits,　belonging　to　the　newest　process　that　uses　sulfuric　acid　to　dispose　borax　ore　or　industrial　borax　and　prepare　industrial　boric　acid　in　China.

III.　Production　Principle:　

Make　borax　ore　react　with　sulfuric　acid,　with　the　existence　of　aid,　control　certain　temperature　and　process　conditions,　respectively　output　boric　acid　and　sodium　nitrate.　Implement　separation,　washing,　whirling,　drying　and　packaging　for　boric　acid　from　sodium　nitrate　to　produce　high　quality　industrial　boric　acid　and　sodium　sulfate　product.　The　technological　process　does　not　need　evaporation.

IV.　Product　Yield　and　Quality:　

B2O3　yield　is　above　95%,　and　boric　acid　product　quality　is　in　conformity　with　international　standard.　Sodium　sulfate　yield　is　above　85%.

V.　Main　Economic　and　Technological　Indicators:　

Consumption　for　producing　t　boric　acid:　borax　ore　(grade　28%)　2,280kg;　sulfuric　acid　550kg;　electricity　100kw·h;　and　coal　200kg.

VI.　Equipment　Investment:　

Annual　production　is　5,000t,　and　equipment　investment　is　about　2.5　million　Yuan.　Transformation　of　the　old　factory　does　not　need　any　additional　investment,　only　need　to　adjust　process　conditions.

VII.　Form　of　Cooperation　and　Service　Method:　

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.