In the past, maleic anhydride (maleic anhydride) was mainly powder. Because maleic anhydride had the smell of choking nose and spicy eyes, the powder was more irritating to people, and the production was too low, so it was slowly replaced by flake maleic anhydride. At this stage, there are basically no manufacturers to manufacture powdered maleic anhydride. Some of them are manufactured in a small amount as commodities of unique customer groups, which is not large-scale.

片狀順酐（馬來酸酐）由于流水線的切割刀鋼度較為強(qiáng)，而順酐自身是結(jié)晶，因此所切的片的樣子沒辦法操縱，沒辦法保證勻稱，會(huì)有許多粉末造成，封進(jìn)包裝袋子后，商品一受潮，一擠壓成型，還是非常容易粘成塊狀，導(dǎo)致加料的不便捷，并且量上提不上，落伍的加工工藝淘汰也不新奇了。

Because the cutting knife of the production line has strong rigidity and the maleic anhydride itself is crystalline, the shape of the cut pieces can not be manipulated and symmetrical, which will be caused by many powders. After being sealed in the packaging bag, once the goods are damp and extruded, they are still very easy to stick into blocks, resulting in inconvenient feeding, Moreover, the production volume can not be raised, and the elimination of outdated processing technology is not novel.

受原材料苯的上漲，各地域剛開始挺價(jià)實(shí)際操作，苯法加工廠受原材料上漲危害團(tuán)體上漲，并且廉價(jià)貨慢慢得勢，持貨商沒有響應(yīng)積極主動(dòng)，廉價(jià)出不來，援手主要加工廠，但是受中下游產(chǎn)銷率不夠危害，預(yù)估上漲力度不容易很大，等主要加工廠出具體指導(dǎo)價(jià)錢。

Due to the rise of raw material benzene, local regions have just begun to support the actual operation of price. Benzene process plants are affected by the rise of raw materials, and cheap goods are slowly gaining momentum. The goods holders do not respond actively and can not come out cheaply to help the main processing plants. However, due to the insufficient production and marketing rate in the middle and lower reaches, it is not easy to estimate the rise, and the main processing plants give specific guidance prices.