preparation of formaldehyde

{"cid":"91221131","title":"SNF-A Sodium Naphthalene Formaldehyde Na2SO4 Content 5%","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/7d\/62\/c028f3e5e05b2f579675c101bb06-200x200-1.jpg","attrs":{"Price":"500USD-800USD","Brand Name":"ATET","Model Number":"SNF-A","Minimum Order Quantity":"1MT","Delivery Time":"7-10 DAYS","Certification":"ISO","Place of Origin":"CHINA","Payment Terms":"T\/T, L\/C, D\/A, D\/P, Western Union, MoneyGram","Supply Ability":"3000MT\/MONTH","Packaging Details":"20KG\/BAG,25KG\/BAG,50KG\/BAG,500KG\/BAG,550KG\/BAG,600KG\/BAG,","Appearance":"Yellow Brown Powder","Solids content (%)":"92min","Content of cl- (%)":"0.3max","PH value":"7-9","Liquidity of Cement Paste\u00a0\uff08mm\uff09":"240min","Na2SO4 content (%)":"5max","Air Content(%)":"3.0max","Water-reducing\u00a0rate":"18min","Initial Setting tim":"-90~+120","Terminal Setting time":"-90~+120"}}

{"cid":"91183760","title":"Water Solubility Phenol Resorcinol Formaldehyde Resin , Liquid Phenolic Resin For Floral Foams Blocks","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/21\/0f\/8662d6ab02dc3e0de81787036cc0-200x200-1.jpg","attrs":{"Price":"Negotiation","Brand Name":"HONINGLITE","Model Number":"Y3624","Minimum Order Quantity":"1000KGS","Place of Origin":"CHINA","Payment Terms":"T\/T, L\/C, D\/P","Supply Ability":"5000TONS PRT MONTH","Packaging Details":"25KGS BAG","Appearance":"Red Brown Liquid","Package":"200KG drum","Monomers":"Phenol And Formaldhyde","Solubility":"Water","Features1":"Improved toughness","Features2":"Improved heat resistance","Features3":"Improved Impact Strength"}}